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Papers by Lydia Caroline

Research paper thumbnail of Growth and characterization of an organic nonlinear optical material: l-alanine alaninium nitrate

Materials Letters, May 1, 2008

L-Histidine malonate is one of the potential organic material for nonlinear optical applications.... more L-Histidine malonate is one of the potential organic material for nonlinear optical applications. Single crystals of L-Histidine malonate were grown by the liquid diffusion method. The lattice parameter values were evaluated from single crystal X-ray diffraction technique. The Fourier Transform Infra Red and Raman spectral studies were employed to identify the different modes of vibrations of molecular groups in the crystal. Optical characterization and the percentage of optical transmission were recorded using UV-vis-NIR spectroscopy. The molecular structure was established by proton and carbon Nuclear magnetic resonance spectral studies. The thermal behavior of the material has been studied by Thermo gravimetric and Differential thermal plots. The second harmonic generation conversion efficiency was found out from the powder technique of Kurtz and Perry.

Research paper thumbnail of Growth and characterization of a nonlinear optical material: l-alanine dl-mandelic acid hemihydrate

Journal of Materials Science: Materials in Electronics, Jul 14, 2018

Abstractl-Alanine dl-mandelic acid hemihydrate (LADLMAH) an organic nonlinear optical chromophore... more Abstractl-Alanine dl-mandelic acid hemihydrate (LADLMAH) an organic nonlinear optical chromophore crystal was synthesized using water as solvent and the crystals were grown by a slow solvent evaporation method. The single crystal X-ray diffraction study reveals that the crystals possess to triclinic system with acentric space group P1. The coordination of different moieties present in the compound and molecular structure were elucidated by vibrational and NMR spectroscopic studies. The lower cut-off wavelength is observed down to 258 nm and direct optical band gap was calculated as 5.20 eV. Second harmonic generation was confirmed by Kurtz–Perry powder method. Discrete thermodynamic properties were carried out by TG–DTA techniques. A multiple shot laser technique was adopted to investigate the surface laser damage of the crystal. The microhardness test was carried out employing one of the as-grown hard crystals and there by hardness number (Hv) and Meyer’s index (n) were assessed. The dielectric behaviour of the grown crystal was studied for different temperatures at different frequencies. The third-order optical nonlinearity parameters of LADLMAH were investigated in detail using a Z-scan technique with Nd:YAG laser at 532 nm.

Research paper thumbnail of Crystal growth, optical, luminescence, SHG and THG exploration of an inorganic noncentrosymmetric alkaline borate crystal: K2B4O5(OH)4·3·6H2O(KBOH) for photonic and optical limiting applications

Journal of Materials Science: Materials in Electronics

Research paper thumbnail of Growth, spectral and thermal properties of Sulphanilic acid single crystals in the presence of L-proline and L-lysine monohydrochloride dihydrate as dopants

Optoelectronics and Advanced Materials-rapid Communications, 2015

Research paper thumbnail of Growth and characterization of some organic and semiorganic amino acid based nonlinear optical single crystals

Research paper thumbnail of Crystal growth and properties of pure L-alanine and boric acid doped L-alanine nonlinear optical single crystals for frequency conversion

Journal of Materials Science: Materials in Electronics

Research paper thumbnail of Growth and Characterization of Second and Third Order Acentric Studies of l-Phenylalanine l-Phenylalaninium Malonate Single Crystal

Crystals

A single crystal of l-phenylalanine l-phenylalanininum malonate (LPPMA) was synthesized by slow e... more A single crystal of l-phenylalanine l-phenylalanininum malonate (LPPMA) was synthesized by slow evaporation and was subjected to nonlinear optical examination and physio-chemical characterization. Studies on single X-ray diffraction confirm the arrangement of monoclinic space group P21 which is a vital criterion for the NLO phenomenon. The assessment of functional groups and diverse vibration modes responsible for the characteristics of the material was performed with an FTIR analysis. The UV-visible spectral examination found the wavelength of UV-cutoff at 233 nm and various optical parameters were evaluated. The mechanical strength and different criteria associated with it were assessed. The electric field response of the material was examined in terms of the dielectric constant, dielectric loss, ac conductivity and activation energy. The spectra of emission were detailed. The efficacy of second harmonic generation was studied. The parameters of nonlinearity were investigated to a...

Research paper thumbnail of Investigations on synthesis, growth and physical characterization of lithium selenoindate single crystals

Journal of Crystal Growth, 2014

Crack free LiInSe 2 single crystal with bottom dimension of 8 mm diameter and 10 mm length and to... more Crack free LiInSe 2 single crystal with bottom dimension of 8 mm diameter and 10 mm length and top dimension of 12 mm diameter and 22 mm length was grown using modified vertical Bridgman-Stockbarger method with steady ampoule rotation. The grown LiInSe 2 crystal was characterized by X-ray diffraction pattern, Rutherford backscattering spectroscopy (RBS) analysis, Thermogravimetric-Differential thermal (TG-DTA) analysis, Optical Transmission and Microhardness measurements. X-ray diffraction pattern gives the orientation of the crystal as <002>. RBS analysis confirms that the composition of the grown crystal is Li 0.8 In 1.16 Se 2.04. TG-DTA analysis confirms that the melting point of the grown crystal is 897.5 ºC. Optical behavior has been assessed by ultraviolet-visible-Near infrared spectroscopy and Fourier transform infrared analysis. LiInSe 2 optical band gap energy is 2.72 eV and the cut off wave length is 450 nm. Mechanical behavior has been studied using Vickers Microhardness measurements.

Research paper thumbnail of Growth and Characterization of Bis(thiourea) Cadmium Acetate Single Crystal: An Efficient Semiorganic Non-linear Optical Single Crystal

Asian Journal of Chemistry, 2013

Bis(thiourea) cadmium acetate, a metal semiorganic non-linear optical crystal, was synthesized fr... more Bis(thiourea) cadmium acetate, a metal semiorganic non-linear optical crystal, was synthesized from thiourea and cadmium acetate using double distilled water. The synthesized salt was used to grow bulk size crystals. The XRD analysis confirmed that bis(thiourea)cadmium acetate has orthorhombic crystal structure. The UV transmission study indicates that there is a very low absorption in the visible light region. FTIR analysis suggests the presence of functional groups in the grown crystal. Thermal studies reveal that the grown crystal has considerable thermal stability and it can be exploited for industrial applications. The non-linear optical study confirms frequency doubling of the sample using Nd:YAG laser.

Research paper thumbnail of Growth and Characterization of Chloro Bis Thiourea Mercury (II) Chloride (CBTMC) Grown by Slow Evaporation Technique for Nonlinear Optical Applications

A noncentrosymmetric hard anisotropy crystals of Chloro bis thiourea mercury (II) chloride (CBTMC... more A noncentrosymmetric hard anisotropy crystals of Chloro bis thiourea mercury (II) chloride (CBTMC),[HgCl [CS(NH2)2]2Cl], was synthesized using water as solvent and grown by slow solvent evaporation method and its properties are reported for the first time to attest its suitability in nonlinear optical applications. CBTMC single crystals possessing good morphology with size up to 0.6 × 0.4 × 0.2 cm3 were collected from the crystallization vessels after 12 days. Crystallography structure diffraction analysis using X-radiation confirms the non-centrosymmetric (polar) space group Pmmn, which is the key requirement to exhibit nonlinear optical activity. The crystals are analyzed by powder X-ray diffraction (PXRD) to assess the good crystalline nature. The existence of various functional groups in the synthesized compound were manifested and examined by FTIR spectrum. The thermal analysis disclosed the maximum temperature of operation of 253 °C for CBTMC. The EDAX spectrum emphasized the ...

Research paper thumbnail of Author's personal copy Growth and characterization of pure and doped bis thiourea zinc acetate: Semiorganic nonlinear optical single crystals

Current Applied Physics

a b s t r a c t Metal–organic coordination complex single crystals bis thiourea zinc acetate (BTZ... more a b s t r a c t Metal–organic coordination complex single crystals bis thiourea zinc acetate (BTZA) and Cd 2+ doped BTZA have been synthesized and grown successfully by slow-cooling technique from their aqueous solutions. Single crystals of pure and Cd 2+ doped BTZA with dimensions of 35 Â 4 Â 2 mm 3 and 10 Â 5 Â 6 mm 3 , respectively were obtained with well defined morphology. The as grown single crystals are characterized by single crystal XRD studies and melting point measurements which reveal the incorporation of metallic dopants has not changed the structure of the parent crystal. The powder X-ray diffractogram of the grown crystals has been recorded and the various planes of reflection identified shows shift in the peak posi-tions. The metal coordination with thiourea through sulphur in pure and Cd 2+ doped BTZA were ascer-tained by FTIR studies and optical absorption study to identify the UV cut-off range. The presence of metals in pure and Cd 2+ doped BTZA crystal lattice we...

Research paper thumbnail of Growth and characterization of dichlorobis l-proline Zn(II): A semiorganic nonlinear optical single crystal

Journal of Crystal Growth, 2009

... crystal. M. Lydia Caroline a , Corresponding Author Contact Information , E-mail The Correspo... more ... crystal. M. Lydia Caroline a , Corresponding Author Contact Information , E-mail The Corresponding Author , A. Kandasamy b , R. Mohan c and S. Vasudevan d , E-mail The Corresponding Author. a ... 13]. Also Kandasamy et al. [14 ...

Research paper thumbnail of Growth and characterization of an efficient new NLO single crystal L -phenylalanine D -methionine for frequency conversion and optoelectronic applications

Physica B: Condensed Matter, 2017

Abstract Optically active single crystals of L -phenylalanine D -methionine (LPDM) were grown by ... more Abstract Optically active single crystals of L -phenylalanine D -methionine (LPDM) were grown by slow evaporation technique by co-crystallization of amino acids L -phenylalanine and D -methionine in water. The unit cell dimensions have been identified from single crystal X-ray diffraction technique. The existences of various hydrocarbyls were examined by FTIR and FT-Raman spectroscopy. The carbon and hydrogen environment of the grown crystals were analyzed by FT NMR spectrum. The optical absorption studies show that the crystal is transparent in the visible region with a lower cut-off wavelength of 259 nm and there by optical band gap energy E g is calculated to be 5.35 eV. The Urbach energy, extinction coefficient, reflectance were calculated from UV-absorption data. Further, the thermal stability and accurate melting point has been investigated by TG/DSC techniques. The Kurtz powder SHG was confirmed using Nd:YAG laser with fundamental wavelength of 1064 nm. The dielectric behavior of the specimen has been determined for various temperatures (313 K, 333 K, 353 K, 373 K) at different frequencies. Fluorescence study and the time resolved decay calculation was also performed for the LPDM crystal. Optical nonlinear susceptibility was measured in LPDM and the real and imaginary part of χ 3 was evaluated by Z-scan technique using open and closed apertures.

Research paper thumbnail of Influence of uranyl on the growth, linear, laser damage threshold and nonlinear optical studies on potential nonlinear optical single crystal: L-alanine

JCHPS Special Issue 11: October 2015 www.jchps.com Page 166 Influence of uranyl on the growth, li... more JCHPS Special Issue 11: October 2015 www.jchps.com Page 166 Influence of uranyl on the growth, linear, laser damage threshold and nonlinear optical studies on potential nonlinear optical single crystal: L-alanine C.Rathika Thaya Kumari, M.Nageshwari, S.Sudha, M. Lydia Caroline, G.Mani PG & Research Department of Physics, Arignar Anna.Govt. Arts College, Cheyyar 604 407, TN, India *Corresponding author: E.Mail: lydiacaroline2006@yahoo.co.in ABSTRACT Effect of uranyl on the growth and properties of L-alanine (LA) single crystals has been studied. Single crystals of pure and uranyl doped LA was obtained with well-defined morphology. The as grown metal doped and pure single crystals were characterized using single crystal XRD technique which confirmed that the incorporation of metallic dopants has not changed the basic structure of the parent crystal. The pure and doped LA crystals have good transmission range extending from the ultraviolet into the infrared region. Fourier transform in...

Research paper thumbnail of Growth and characterization of a nonlinear optical material: l-alanine dl-mandelic acid hemihydrate

Abstractl-Alanine dl-mandelic acid hemihydrate (LADLMAH) an organic nonlinear optical chromophore... more Abstractl-Alanine dl-mandelic acid hemihydrate (LADLMAH) an organic nonlinear optical chromophore crystal was synthesized using water as solvent and the crystals were grown by a slow solvent evaporation method. The single crystal X-ray diffraction study reveals that the crystals possess to triclinic system with acentric space group P1. The coordination of different moieties present in the compound and molecular structure were elucidated by vibrational and NMR spectroscopic studies. The lower cut-off wavelength is observed down to 258 nm and direct optical band gap was calculated as 5.20 eV. Second harmonic generation was confirmed by Kurtz–Perry powder method. Discrete thermodynamic properties were carried out by TG–DTA techniques. A multiple shot laser technique was adopted to investigate the surface laser damage of the crystal. The microhardness test was carried out employing one of the as-grown hard crystals and there by hardness number (Hv) and Meyer’s index (n) were assessed. T...

Research paper thumbnail of Synthesis, growth, optical and third order nonlinear optical properties of l-Phenylalanine d-Mandelic acid single crystal for photonic device applications

Journal of Materials Science: Materials in Electronics

Organic nonlinear optical l-phenylalanine d-mandelic acid (LPDMA) single crystals have been harve... more Organic nonlinear optical l-phenylalanine d-mandelic acid (LPDMA) single crystals have been harvested adopting slow solvent evaporation solution growth technique (SSEST) with growth period of 15 days. The XRD studies of the crystal confirm the non-centrosymmetric nature of the crystal. The presence of functional groups for the formation of the compound was confirmed by Fourier Transform Infrared (FTIR) analysis. The UV–Visible spectral studies ascertained linear optical quality and estimation of optical parameters. The nonlinear optical property was studied from Kurtz-Perry powder technique and Z-scan technique. The quantum chemical calculations such as HOMO–LUMO and Molecular Electrostatic Potential (MEP) were calculated and presented. In order to find out various mechanical parameters such as Vicker’s hardness number (Hv), Mayer’s index (n), yield strength (σy) and stiffness constant (C11), Vicker’s microhardness tester was utilized.

Research paper thumbnail of A Brief Study on Optical and Mechanical Properties of an Organic Material: Urea Glutaric Acid (2/1)—A Third Order Nonlinear Optical Single Crystal

Crystals

Urea glutaric acid (UGA), an organic crystal, was synthesized and grown using a low temperature s... more Urea glutaric acid (UGA), an organic crystal, was synthesized and grown using a low temperature solution technique. Single crystal XRD revealed a monoclinic structure with a C2/C space group. The various cell data were identified. The optical parameters were calculated from UV-visible spectrum. The transmittance spectra showed the cutoff wavelength as 240 nm (low) and the energy gap determined from the spectra was compared with the theoretical energy gap. The transition number revealed the electron transition, which corresponded to direct allowed transition. The diverse optical parameters like reflectance, extinction coefficient, refractive index and optical susceptibility were determined. The least value of Urbach energy caused less defects and a good crystalline nature. The steepness value and electron phonon interaction were calculated. The positions of lower and higher band energy levels were identified. Electronic polarizability was found using the Clausius–Mossoti relation and...

Research paper thumbnail of Spectroscopic (FT-IR, FT-Raman) investigations, chemical properties, antimicrobial and molecular docking analyses of 2-hydroxybenzhydrazied

Materials Today: Proceedings

Research paper thumbnail of Crystal growth, optical, spectroscopic studies, PL behaviour and Hirshfield surface analysis of a third-order nonlinear optical Cesium Hydrogen Oxalate Dihydrate (CHOD) single crystal

Journal of Materials Science: Materials in Electronics

Research paper thumbnail of Linear and nonlinear optical investigation of l-arginium adipate single crystal for photonic applications

Journal of Materials Science: Materials in Electronics

Research paper thumbnail of Growth and characterization of an organic nonlinear optical material: l-alanine alaninium nitrate

Materials Letters, May 1, 2008

L-Histidine malonate is one of the potential organic material for nonlinear optical applications.... more L-Histidine malonate is one of the potential organic material for nonlinear optical applications. Single crystals of L-Histidine malonate were grown by the liquid diffusion method. The lattice parameter values were evaluated from single crystal X-ray diffraction technique. The Fourier Transform Infra Red and Raman spectral studies were employed to identify the different modes of vibrations of molecular groups in the crystal. Optical characterization and the percentage of optical transmission were recorded using UV-vis-NIR spectroscopy. The molecular structure was established by proton and carbon Nuclear magnetic resonance spectral studies. The thermal behavior of the material has been studied by Thermo gravimetric and Differential thermal plots. The second harmonic generation conversion efficiency was found out from the powder technique of Kurtz and Perry.

Research paper thumbnail of Growth and characterization of a nonlinear optical material: l-alanine dl-mandelic acid hemihydrate

Journal of Materials Science: Materials in Electronics, Jul 14, 2018

Abstractl-Alanine dl-mandelic acid hemihydrate (LADLMAH) an organic nonlinear optical chromophore... more Abstractl-Alanine dl-mandelic acid hemihydrate (LADLMAH) an organic nonlinear optical chromophore crystal was synthesized using water as solvent and the crystals were grown by a slow solvent evaporation method. The single crystal X-ray diffraction study reveals that the crystals possess to triclinic system with acentric space group P1. The coordination of different moieties present in the compound and molecular structure were elucidated by vibrational and NMR spectroscopic studies. The lower cut-off wavelength is observed down to 258 nm and direct optical band gap was calculated as 5.20 eV. Second harmonic generation was confirmed by Kurtz–Perry powder method. Discrete thermodynamic properties were carried out by TG–DTA techniques. A multiple shot laser technique was adopted to investigate the surface laser damage of the crystal. The microhardness test was carried out employing one of the as-grown hard crystals and there by hardness number (Hv) and Meyer’s index (n) were assessed. The dielectric behaviour of the grown crystal was studied for different temperatures at different frequencies. The third-order optical nonlinearity parameters of LADLMAH were investigated in detail using a Z-scan technique with Nd:YAG laser at 532 nm.

Research paper thumbnail of Crystal growth, optical, luminescence, SHG and THG exploration of an inorganic noncentrosymmetric alkaline borate crystal: K2B4O5(OH)4·3·6H2O(KBOH) for photonic and optical limiting applications

Journal of Materials Science: Materials in Electronics

Research paper thumbnail of Growth, spectral and thermal properties of Sulphanilic acid single crystals in the presence of L-proline and L-lysine monohydrochloride dihydrate as dopants

Optoelectronics and Advanced Materials-rapid Communications, 2015

Research paper thumbnail of Growth and characterization of some organic and semiorganic amino acid based nonlinear optical single crystals

Research paper thumbnail of Crystal growth and properties of pure L-alanine and boric acid doped L-alanine nonlinear optical single crystals for frequency conversion

Journal of Materials Science: Materials in Electronics

Research paper thumbnail of Growth and Characterization of Second and Third Order Acentric Studies of l-Phenylalanine l-Phenylalaninium Malonate Single Crystal

Crystals

A single crystal of l-phenylalanine l-phenylalanininum malonate (LPPMA) was synthesized by slow e... more A single crystal of l-phenylalanine l-phenylalanininum malonate (LPPMA) was synthesized by slow evaporation and was subjected to nonlinear optical examination and physio-chemical characterization. Studies on single X-ray diffraction confirm the arrangement of monoclinic space group P21 which is a vital criterion for the NLO phenomenon. The assessment of functional groups and diverse vibration modes responsible for the characteristics of the material was performed with an FTIR analysis. The UV-visible spectral examination found the wavelength of UV-cutoff at 233 nm and various optical parameters were evaluated. The mechanical strength and different criteria associated with it were assessed. The electric field response of the material was examined in terms of the dielectric constant, dielectric loss, ac conductivity and activation energy. The spectra of emission were detailed. The efficacy of second harmonic generation was studied. The parameters of nonlinearity were investigated to a...

Research paper thumbnail of Investigations on synthesis, growth and physical characterization of lithium selenoindate single crystals

Journal of Crystal Growth, 2014

Crack free LiInSe 2 single crystal with bottom dimension of 8 mm diameter and 10 mm length and to... more Crack free LiInSe 2 single crystal with bottom dimension of 8 mm diameter and 10 mm length and top dimension of 12 mm diameter and 22 mm length was grown using modified vertical Bridgman-Stockbarger method with steady ampoule rotation. The grown LiInSe 2 crystal was characterized by X-ray diffraction pattern, Rutherford backscattering spectroscopy (RBS) analysis, Thermogravimetric-Differential thermal (TG-DTA) analysis, Optical Transmission and Microhardness measurements. X-ray diffraction pattern gives the orientation of the crystal as <002>. RBS analysis confirms that the composition of the grown crystal is Li 0.8 In 1.16 Se 2.04. TG-DTA analysis confirms that the melting point of the grown crystal is 897.5 ºC. Optical behavior has been assessed by ultraviolet-visible-Near infrared spectroscopy and Fourier transform infrared analysis. LiInSe 2 optical band gap energy is 2.72 eV and the cut off wave length is 450 nm. Mechanical behavior has been studied using Vickers Microhardness measurements.

Research paper thumbnail of Growth and Characterization of Bis(thiourea) Cadmium Acetate Single Crystal: An Efficient Semiorganic Non-linear Optical Single Crystal

Asian Journal of Chemistry, 2013

Bis(thiourea) cadmium acetate, a metal semiorganic non-linear optical crystal, was synthesized fr... more Bis(thiourea) cadmium acetate, a metal semiorganic non-linear optical crystal, was synthesized from thiourea and cadmium acetate using double distilled water. The synthesized salt was used to grow bulk size crystals. The XRD analysis confirmed that bis(thiourea)cadmium acetate has orthorhombic crystal structure. The UV transmission study indicates that there is a very low absorption in the visible light region. FTIR analysis suggests the presence of functional groups in the grown crystal. Thermal studies reveal that the grown crystal has considerable thermal stability and it can be exploited for industrial applications. The non-linear optical study confirms frequency doubling of the sample using Nd:YAG laser.

Research paper thumbnail of Growth and Characterization of Chloro Bis Thiourea Mercury (II) Chloride (CBTMC) Grown by Slow Evaporation Technique for Nonlinear Optical Applications

A noncentrosymmetric hard anisotropy crystals of Chloro bis thiourea mercury (II) chloride (CBTMC... more A noncentrosymmetric hard anisotropy crystals of Chloro bis thiourea mercury (II) chloride (CBTMC),[HgCl [CS(NH2)2]2Cl], was synthesized using water as solvent and grown by slow solvent evaporation method and its properties are reported for the first time to attest its suitability in nonlinear optical applications. CBTMC single crystals possessing good morphology with size up to 0.6 × 0.4 × 0.2 cm3 were collected from the crystallization vessels after 12 days. Crystallography structure diffraction analysis using X-radiation confirms the non-centrosymmetric (polar) space group Pmmn, which is the key requirement to exhibit nonlinear optical activity. The crystals are analyzed by powder X-ray diffraction (PXRD) to assess the good crystalline nature. The existence of various functional groups in the synthesized compound were manifested and examined by FTIR spectrum. The thermal analysis disclosed the maximum temperature of operation of 253 °C for CBTMC. The EDAX spectrum emphasized the ...

Research paper thumbnail of Author's personal copy Growth and characterization of pure and doped bis thiourea zinc acetate: Semiorganic nonlinear optical single crystals

Current Applied Physics

a b s t r a c t Metal–organic coordination complex single crystals bis thiourea zinc acetate (BTZ... more a b s t r a c t Metal–organic coordination complex single crystals bis thiourea zinc acetate (BTZA) and Cd 2+ doped BTZA have been synthesized and grown successfully by slow-cooling technique from their aqueous solutions. Single crystals of pure and Cd 2+ doped BTZA with dimensions of 35 Â 4 Â 2 mm 3 and 10 Â 5 Â 6 mm 3 , respectively were obtained with well defined morphology. The as grown single crystals are characterized by single crystal XRD studies and melting point measurements which reveal the incorporation of metallic dopants has not changed the structure of the parent crystal. The powder X-ray diffractogram of the grown crystals has been recorded and the various planes of reflection identified shows shift in the peak posi-tions. The metal coordination with thiourea through sulphur in pure and Cd 2+ doped BTZA were ascer-tained by FTIR studies and optical absorption study to identify the UV cut-off range. The presence of metals in pure and Cd 2+ doped BTZA crystal lattice we...

Research paper thumbnail of Growth and characterization of dichlorobis l-proline Zn(II): A semiorganic nonlinear optical single crystal

Journal of Crystal Growth, 2009

... crystal. M. Lydia Caroline a , Corresponding Author Contact Information , E-mail The Correspo... more ... crystal. M. Lydia Caroline a , Corresponding Author Contact Information , E-mail The Corresponding Author , A. Kandasamy b , R. Mohan c and S. Vasudevan d , E-mail The Corresponding Author. a ... 13]. Also Kandasamy et al. [14 ...

Research paper thumbnail of Growth and characterization of an efficient new NLO single crystal L -phenylalanine D -methionine for frequency conversion and optoelectronic applications

Physica B: Condensed Matter, 2017

Abstract Optically active single crystals of L -phenylalanine D -methionine (LPDM) were grown by ... more Abstract Optically active single crystals of L -phenylalanine D -methionine (LPDM) were grown by slow evaporation technique by co-crystallization of amino acids L -phenylalanine and D -methionine in water. The unit cell dimensions have been identified from single crystal X-ray diffraction technique. The existences of various hydrocarbyls were examined by FTIR and FT-Raman spectroscopy. The carbon and hydrogen environment of the grown crystals were analyzed by FT NMR spectrum. The optical absorption studies show that the crystal is transparent in the visible region with a lower cut-off wavelength of 259 nm and there by optical band gap energy E g is calculated to be 5.35 eV. The Urbach energy, extinction coefficient, reflectance were calculated from UV-absorption data. Further, the thermal stability and accurate melting point has been investigated by TG/DSC techniques. The Kurtz powder SHG was confirmed using Nd:YAG laser with fundamental wavelength of 1064 nm. The dielectric behavior of the specimen has been determined for various temperatures (313 K, 333 K, 353 K, 373 K) at different frequencies. Fluorescence study and the time resolved decay calculation was also performed for the LPDM crystal. Optical nonlinear susceptibility was measured in LPDM and the real and imaginary part of χ 3 was evaluated by Z-scan technique using open and closed apertures.

Research paper thumbnail of Influence of uranyl on the growth, linear, laser damage threshold and nonlinear optical studies on potential nonlinear optical single crystal: L-alanine

JCHPS Special Issue 11: October 2015 www.jchps.com Page 166 Influence of uranyl on the growth, li... more JCHPS Special Issue 11: October 2015 www.jchps.com Page 166 Influence of uranyl on the growth, linear, laser damage threshold and nonlinear optical studies on potential nonlinear optical single crystal: L-alanine C.Rathika Thaya Kumari, M.Nageshwari, S.Sudha, M. Lydia Caroline, G.Mani PG & Research Department of Physics, Arignar Anna.Govt. Arts College, Cheyyar 604 407, TN, India *Corresponding author: E.Mail: lydiacaroline2006@yahoo.co.in ABSTRACT Effect of uranyl on the growth and properties of L-alanine (LA) single crystals has been studied. Single crystals of pure and uranyl doped LA was obtained with well-defined morphology. The as grown metal doped and pure single crystals were characterized using single crystal XRD technique which confirmed that the incorporation of metallic dopants has not changed the basic structure of the parent crystal. The pure and doped LA crystals have good transmission range extending from the ultraviolet into the infrared region. Fourier transform in...

Research paper thumbnail of Growth and characterization of a nonlinear optical material: l-alanine dl-mandelic acid hemihydrate

Abstractl-Alanine dl-mandelic acid hemihydrate (LADLMAH) an organic nonlinear optical chromophore... more Abstractl-Alanine dl-mandelic acid hemihydrate (LADLMAH) an organic nonlinear optical chromophore crystal was synthesized using water as solvent and the crystals were grown by a slow solvent evaporation method. The single crystal X-ray diffraction study reveals that the crystals possess to triclinic system with acentric space group P1. The coordination of different moieties present in the compound and molecular structure were elucidated by vibrational and NMR spectroscopic studies. The lower cut-off wavelength is observed down to 258 nm and direct optical band gap was calculated as 5.20 eV. Second harmonic generation was confirmed by Kurtz–Perry powder method. Discrete thermodynamic properties were carried out by TG–DTA techniques. A multiple shot laser technique was adopted to investigate the surface laser damage of the crystal. The microhardness test was carried out employing one of the as-grown hard crystals and there by hardness number (Hv) and Meyer’s index (n) were assessed. T...

Research paper thumbnail of Synthesis, growth, optical and third order nonlinear optical properties of l-Phenylalanine d-Mandelic acid single crystal for photonic device applications

Journal of Materials Science: Materials in Electronics

Organic nonlinear optical l-phenylalanine d-mandelic acid (LPDMA) single crystals have been harve... more Organic nonlinear optical l-phenylalanine d-mandelic acid (LPDMA) single crystals have been harvested adopting slow solvent evaporation solution growth technique (SSEST) with growth period of 15 days. The XRD studies of the crystal confirm the non-centrosymmetric nature of the crystal. The presence of functional groups for the formation of the compound was confirmed by Fourier Transform Infrared (FTIR) analysis. The UV–Visible spectral studies ascertained linear optical quality and estimation of optical parameters. The nonlinear optical property was studied from Kurtz-Perry powder technique and Z-scan technique. The quantum chemical calculations such as HOMO–LUMO and Molecular Electrostatic Potential (MEP) were calculated and presented. In order to find out various mechanical parameters such as Vicker’s hardness number (Hv), Mayer’s index (n), yield strength (σy) and stiffness constant (C11), Vicker’s microhardness tester was utilized.

Research paper thumbnail of A Brief Study on Optical and Mechanical Properties of an Organic Material: Urea Glutaric Acid (2/1)—A Third Order Nonlinear Optical Single Crystal

Crystals

Urea glutaric acid (UGA), an organic crystal, was synthesized and grown using a low temperature s... more Urea glutaric acid (UGA), an organic crystal, was synthesized and grown using a low temperature solution technique. Single crystal XRD revealed a monoclinic structure with a C2/C space group. The various cell data were identified. The optical parameters were calculated from UV-visible spectrum. The transmittance spectra showed the cutoff wavelength as 240 nm (low) and the energy gap determined from the spectra was compared with the theoretical energy gap. The transition number revealed the electron transition, which corresponded to direct allowed transition. The diverse optical parameters like reflectance, extinction coefficient, refractive index and optical susceptibility were determined. The least value of Urbach energy caused less defects and a good crystalline nature. The steepness value and electron phonon interaction were calculated. The positions of lower and higher band energy levels were identified. Electronic polarizability was found using the Clausius–Mossoti relation and...

Research paper thumbnail of Spectroscopic (FT-IR, FT-Raman) investigations, chemical properties, antimicrobial and molecular docking analyses of 2-hydroxybenzhydrazied

Materials Today: Proceedings

Research paper thumbnail of Crystal growth, optical, spectroscopic studies, PL behaviour and Hirshfield surface analysis of a third-order nonlinear optical Cesium Hydrogen Oxalate Dihydrate (CHOD) single crystal

Journal of Materials Science: Materials in Electronics

Research paper thumbnail of Linear and nonlinear optical investigation of l-arginium adipate single crystal for photonic applications

Journal of Materials Science: Materials in Electronics