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Papers by Annemarie Pucci

Research paper thumbnail of Roadmap on biosensing and photonics with advanced nano-optical methods

Journal of Optics, 2016

This roadmap, through the contributions of ten groups worldwide, contains different techniques, m... more This roadmap, through the contributions of ten groups worldwide, contains different techniques, methods and materials devoted to sensing in nanomedicine. Optics is used in different ways in the detection schemes. Raman, fluorescence and infrared spectroscopies, plasmonics, second harmonic generation and optical tweezers are all used in applications from single molecule detection (both in highly diluted and in highly concentrated solutions) to single cell manipulation. In general, each optical scheme, through device miniaturization and electromagnetic field localization, exploits an intrinsic optical enhancement mechanism in order to increase the sensitivity and selectivity of the device with respect to the complex molecular construct. The materials used for detection include nanoparticles and nanostructures fabricated with different 2D and 3D lithographic methods. It is shown that sensitivity to a single molecule is already accessible whether the system under study is a single cell or a multitude of cells in a molecular mixture. Throughout the roadmap there is an attempt to foresee and to suggest future directions in this interdisciplinary field.

Research paper thumbnail of Water Infiltration in Methylammonium Lead Iodide Perovskite: Fast and Inconspicuous

Chemistry of Materials, 2015

Research paper thumbnail of Importance of Plasmonic Scattering for an Optimal Enhancement of Vibrational Absorption in SEIRA with Linear Metallic Antennas

The Journal of Physical Chemistry C, 2015

Surface-enhanced infrared absorption (SEIRA) and surface-enhanced Raman scattering (SERS) represe... more Surface-enhanced infrared absorption (SEIRA) and surface-enhanced Raman scattering (SERS) represent very effective techniques to detect molecular vibrational fingerprints. These techniques can be improved thanks to the use of plasmonic antennas that produce strong resonant near-fields in their vicinity, enhancing the signal of vibrational samples. Here we study the role of plasmonic absorption and scattering of the hosting antennas in the resulting SEIRA signal. Using numerical simulations of the antenna−sample infrared response, we show that the optimal SEIRA signal measured in transmittance (as extinction) is achieved when the spectral maxima of absorption and scattering of the antennas are of similar magnitude. Paradoxically, when the optimal condition for SEIRA is fulfilled, the decomposition of the signal into the contribution from scattering and from absorption show that the vibrational fingerprint is exclusively a result of the scattering, with no contribution from absorption. Using a simple analytical model for the description of the fundamental resonance of linear nanoantennas made of a Drude-type metal, we provide guidelines for controlling the plasmonic light scattering and light absorption properties, thus showing how the optimal condition for SEIRA can be achieved in practical situations.

Research paper thumbnail of Enhanced Infrared Absorption of SERS-Active Lines of Ethylene on Cu

Physica Status Solidi (a), 2001

Vibrational modes of adsorbates on rough metal films can show surface enhanced Raman scattering (... more Vibrational modes of adsorbates on rough metal films can show surface enhanced Raman scattering (SERS) as well as surface enhancedinfrared(IR) absorption (SEIRA). Both effects are a consequence of fieldenhancement andof a so-calledchemical effect. Our experiments show that chemical contribu- tions to SERS andto SEIRA from ethylene on Cu may have the same origin. We investigatedethylene adsorbed on ultrathin Cu films

Research paper thumbnail of Infrared Spectral Analysis of Plasmonic Polarons in Doped P3HT Films

physica status solidi (b)

Research paper thumbnail of Interface properties and dopability of an organic semiconductor: TAPP-Br variable as molecule but inert in the condensed phase

Journal of Materials Chemistry C

The behaviour of an organic semiconductor (TAPP-Br) is found to be variable upon condensation on ... more The behaviour of an organic semiconductor (TAPP-Br) is found to be variable upon condensation on various surfaces and as mixtures with typical dopants.

Research paper thumbnail of Plasmonic Light Scattering and Infrared Vibrational Signal Enhancement

ACS Symposium Series

Vibrational signals from weakly infrared-active modes of small amounts of molecules can be detect... more Vibrational signals from weakly infrared-active modes of small amounts of molecules can be detected if the molecules are placed into the confined near-fields of resonant plasmonic nanoparticles, which gives extraordinary signal enhancement. The highest such signals can be achieved with plasmonic objects that equally absorb and scatter the infrared light at resonance. In this chapter we introduce plasmonic nanowires as the simplest of such objects and we demonstrate how they produce the vibrational signal enhancement, why the enhanced signals have an unusual line shape, and how nevertheless quantitative information can be obtained.

Research paper thumbnail of Analytical Study of Solution‐Processed Tin Oxide as Electron Transport Layer in Printed Perovskite Solar Cells

Advanced Materials Technologies

Research paper thumbnail of Non-stoichiometric amorphous magnesium-iron silicates in circumstellar dust shells

Astronomy & Astrophysics

Aims. We study the growth of dust in oxygen-rich stellar outflows in order to find out to which e... more Aims. We study the growth of dust in oxygen-rich stellar outflows in order to find out to which extent dust growth models can quantitatively reconcile with the quantities and nature of dust as derived from observations of the infrared emission from circumstellar dust shells. Methods. We use a set of nine well-observed massive supergiants with optically thin dust shells as testbeds because of the relatively simple properties of the outflows from massive supergiants, contrary to the case of AGB stars. Models of the infrared emission from their circumstellar dust shells are compared to their observed infrared spectra to derive the essential parameters that rule dust formation in the extended envelope of these stars. The results are compared with a model for silicate dust condensation. Results. For all objects, the infrared emission in the studied wavelength range, between 6 and 25 μm, can be reproduced rather well by a mixture of non-stoichiometric iron-bearing silicates, alumina, and ...

Research paper thumbnail of Deposition Dependent Morphology and Infrared Vibrational Spectra of Brominated Tetraazaperopyrene Layers

The Journal of Physical Chemistry C

Research paper thumbnail of Impedance Spectra Analysis of P-Doped Organic Thin Films by Charge Carrier Distribution Evaluation

ACS Applied Electronic Materials

Research paper thumbnail of Present and Future of Surface Enhanced Raman Scattering

ACS Nano

This is an open access article published under an ACS AuthorChoice License, which permits copying... more This is an open access article published under an ACS AuthorChoice License, which permits copying and redistribution of the article or any adaptations for non-commercial purposes.

Research paper thumbnail of How Intrinsic Phonons Manifest in Infrared Plasmonic Resonances of Crystalline Lead Nanowires

The Journal of Physical Chemistry C

Research paper thumbnail of How adsorbates alter the metallic behavior of quasi-one-dimensional electron systems of the Si(553)-Au surface

Journal of Physics: Condensed Matter

The plasmonic signals of quasi-one-dimensional electron systems are a clear and direct measure of... more The plasmonic signals of quasi-one-dimensional electron systems are a clear and direct measure of their metallic behavior. Due to the finite size of such systems in reality, plasmonic signals from a gold-induced superstructure on Si(553) can be studied with infrared spectroscopy. The infrared spectroscopic features have turned out to be extremely sensitive to adsorbates. Even without geometrical changes of the surface superstructure, the effects of doping, of the adsorbate induced electronic surface scattering, and of the electronic polarizability changes on top of the substrate surface give rise to measurable changes of the plasmonic signal. Especially strong changes of the plasmonic signal have been observed for gold, oxygen, and hydrogen exposure. The plasmonic resonance gradually disappears under these exposures, indicating the transion to an insulating behavior, which is in accordance with published results obtained from other experimental methods. For C70 and, as shown here for the first time, TAPP-Br, the plasmonic signal almost retains its original intensity even up to coverages of many monolayers. For C70, the changes of the spectral shape, e.g. of electronic damping and of the resonance position, were also found to be marginal. On the other hand, TAPP-Br adsorption shifts the plasmonic resonance to higher frequencies and strongly increases the electronic damping. Given the dispersion relation for plasmonic resonances of one-dimensional electron systems, the findings for TAPP-Br indicate a push-back effect and therefore stronger confinement of the free charge carriers in the quasi-one-dimensonal channel due to the coverage by the flat TAPP-Br molecules. On the gold-doped Si(553)-Au surface TAPP-Br acts as counter dopant and increases the plasmonic signal.

Research paper thumbnail of C70 increases the plasmonic signal of gold-atom chains on Si(553)

Research paper thumbnail of Controlled Molecular Orientation of Inkjet Printed Semiconducting Polymer Fibers by Crystallization Templating

Research paper thumbnail of Impact of Metal-Optical Properties on Surface-Enhanced Infrared Absorption

The Journal of Physical Chemistry C

Research paper thumbnail of Chemical Identification of Individual Fine Dust Particles with Resonant Plasmonic Enhancement of Nanoslits in the Infrared

Research paper thumbnail of Surface pre-melting and surface flattening of Bi nanofilms on Si(111)-7×7

Surface Science

We report on the in situ observation of temperature-driven drastic morphology evolution and surfa... more We report on the in situ observation of temperature-driven drastic morphology evolution and surface pre-melting of the Bi(0 0 1) nanofilm deposited on the Si(1 1 1)-7 • 7 surface by use of spot-profile-analyzing low-energy electron diffraction (SPA-LEED). Surface step density of the single-crystalline, epitaxial Bi(0 0 1) film decreases above 350 K in a critical manner. On annealed Bi(0 0 1) films, we have detected surface pre-melting with a transition temperature of 350 K, which yields reversible diffraction intensity drop in addition to the harmonic Debye-Waller behavior. The observed surface flattening of the as-deposited film is driven by the increased amount of mobile adatoms created through the surface pre-melting.

Research paper thumbnail of One-Dimensional Plasmonic Excitations in Gold-Induced Superstructures on Si(553): Impact of Gold Coverage and Silicon Step Edge Polarization

The Journal of Physical Chemistry C

Research paper thumbnail of Roadmap on biosensing and photonics with advanced nano-optical methods

Journal of Optics, 2016

This roadmap, through the contributions of ten groups worldwide, contains different techniques, m... more This roadmap, through the contributions of ten groups worldwide, contains different techniques, methods and materials devoted to sensing in nanomedicine. Optics is used in different ways in the detection schemes. Raman, fluorescence and infrared spectroscopies, plasmonics, second harmonic generation and optical tweezers are all used in applications from single molecule detection (both in highly diluted and in highly concentrated solutions) to single cell manipulation. In general, each optical scheme, through device miniaturization and electromagnetic field localization, exploits an intrinsic optical enhancement mechanism in order to increase the sensitivity and selectivity of the device with respect to the complex molecular construct. The materials used for detection include nanoparticles and nanostructures fabricated with different 2D and 3D lithographic methods. It is shown that sensitivity to a single molecule is already accessible whether the system under study is a single cell or a multitude of cells in a molecular mixture. Throughout the roadmap there is an attempt to foresee and to suggest future directions in this interdisciplinary field.

Research paper thumbnail of Water Infiltration in Methylammonium Lead Iodide Perovskite: Fast and Inconspicuous

Chemistry of Materials, 2015

Research paper thumbnail of Importance of Plasmonic Scattering for an Optimal Enhancement of Vibrational Absorption in SEIRA with Linear Metallic Antennas

The Journal of Physical Chemistry C, 2015

Surface-enhanced infrared absorption (SEIRA) and surface-enhanced Raman scattering (SERS) represe... more Surface-enhanced infrared absorption (SEIRA) and surface-enhanced Raman scattering (SERS) represent very effective techniques to detect molecular vibrational fingerprints. These techniques can be improved thanks to the use of plasmonic antennas that produce strong resonant near-fields in their vicinity, enhancing the signal of vibrational samples. Here we study the role of plasmonic absorption and scattering of the hosting antennas in the resulting SEIRA signal. Using numerical simulations of the antenna−sample infrared response, we show that the optimal SEIRA signal measured in transmittance (as extinction) is achieved when the spectral maxima of absorption and scattering of the antennas are of similar magnitude. Paradoxically, when the optimal condition for SEIRA is fulfilled, the decomposition of the signal into the contribution from scattering and from absorption show that the vibrational fingerprint is exclusively a result of the scattering, with no contribution from absorption. Using a simple analytical model for the description of the fundamental resonance of linear nanoantennas made of a Drude-type metal, we provide guidelines for controlling the plasmonic light scattering and light absorption properties, thus showing how the optimal condition for SEIRA can be achieved in practical situations.

Research paper thumbnail of Enhanced Infrared Absorption of SERS-Active Lines of Ethylene on Cu

Physica Status Solidi (a), 2001

Vibrational modes of adsorbates on rough metal films can show surface enhanced Raman scattering (... more Vibrational modes of adsorbates on rough metal films can show surface enhanced Raman scattering (SERS) as well as surface enhancedinfrared(IR) absorption (SEIRA). Both effects are a consequence of fieldenhancement andof a so-calledchemical effect. Our experiments show that chemical contribu- tions to SERS andto SEIRA from ethylene on Cu may have the same origin. We investigatedethylene adsorbed on ultrathin Cu films

Research paper thumbnail of Infrared Spectral Analysis of Plasmonic Polarons in Doped P3HT Films

physica status solidi (b)

Research paper thumbnail of Interface properties and dopability of an organic semiconductor: TAPP-Br variable as molecule but inert in the condensed phase

Journal of Materials Chemistry C

The behaviour of an organic semiconductor (TAPP-Br) is found to be variable upon condensation on ... more The behaviour of an organic semiconductor (TAPP-Br) is found to be variable upon condensation on various surfaces and as mixtures with typical dopants.

Research paper thumbnail of Plasmonic Light Scattering and Infrared Vibrational Signal Enhancement

ACS Symposium Series

Vibrational signals from weakly infrared-active modes of small amounts of molecules can be detect... more Vibrational signals from weakly infrared-active modes of small amounts of molecules can be detected if the molecules are placed into the confined near-fields of resonant plasmonic nanoparticles, which gives extraordinary signal enhancement. The highest such signals can be achieved with plasmonic objects that equally absorb and scatter the infrared light at resonance. In this chapter we introduce plasmonic nanowires as the simplest of such objects and we demonstrate how they produce the vibrational signal enhancement, why the enhanced signals have an unusual line shape, and how nevertheless quantitative information can be obtained.

Research paper thumbnail of Analytical Study of Solution‐Processed Tin Oxide as Electron Transport Layer in Printed Perovskite Solar Cells

Advanced Materials Technologies

Research paper thumbnail of Non-stoichiometric amorphous magnesium-iron silicates in circumstellar dust shells

Astronomy & Astrophysics

Aims. We study the growth of dust in oxygen-rich stellar outflows in order to find out to which e... more Aims. We study the growth of dust in oxygen-rich stellar outflows in order to find out to which extent dust growth models can quantitatively reconcile with the quantities and nature of dust as derived from observations of the infrared emission from circumstellar dust shells. Methods. We use a set of nine well-observed massive supergiants with optically thin dust shells as testbeds because of the relatively simple properties of the outflows from massive supergiants, contrary to the case of AGB stars. Models of the infrared emission from their circumstellar dust shells are compared to their observed infrared spectra to derive the essential parameters that rule dust formation in the extended envelope of these stars. The results are compared with a model for silicate dust condensation. Results. For all objects, the infrared emission in the studied wavelength range, between 6 and 25 μm, can be reproduced rather well by a mixture of non-stoichiometric iron-bearing silicates, alumina, and ...

Research paper thumbnail of Deposition Dependent Morphology and Infrared Vibrational Spectra of Brominated Tetraazaperopyrene Layers

The Journal of Physical Chemistry C

Research paper thumbnail of Impedance Spectra Analysis of P-Doped Organic Thin Films by Charge Carrier Distribution Evaluation

ACS Applied Electronic Materials

Research paper thumbnail of Present and Future of Surface Enhanced Raman Scattering

ACS Nano

This is an open access article published under an ACS AuthorChoice License, which permits copying... more This is an open access article published under an ACS AuthorChoice License, which permits copying and redistribution of the article or any adaptations for non-commercial purposes.

Research paper thumbnail of How Intrinsic Phonons Manifest in Infrared Plasmonic Resonances of Crystalline Lead Nanowires

The Journal of Physical Chemistry C

Research paper thumbnail of How adsorbates alter the metallic behavior of quasi-one-dimensional electron systems of the Si(553)-Au surface

Journal of Physics: Condensed Matter

The plasmonic signals of quasi-one-dimensional electron systems are a clear and direct measure of... more The plasmonic signals of quasi-one-dimensional electron systems are a clear and direct measure of their metallic behavior. Due to the finite size of such systems in reality, plasmonic signals from a gold-induced superstructure on Si(553) can be studied with infrared spectroscopy. The infrared spectroscopic features have turned out to be extremely sensitive to adsorbates. Even without geometrical changes of the surface superstructure, the effects of doping, of the adsorbate induced electronic surface scattering, and of the electronic polarizability changes on top of the substrate surface give rise to measurable changes of the plasmonic signal. Especially strong changes of the plasmonic signal have been observed for gold, oxygen, and hydrogen exposure. The plasmonic resonance gradually disappears under these exposures, indicating the transion to an insulating behavior, which is in accordance with published results obtained from other experimental methods. For C70 and, as shown here for the first time, TAPP-Br, the plasmonic signal almost retains its original intensity even up to coverages of many monolayers. For C70, the changes of the spectral shape, e.g. of electronic damping and of the resonance position, were also found to be marginal. On the other hand, TAPP-Br adsorption shifts the plasmonic resonance to higher frequencies and strongly increases the electronic damping. Given the dispersion relation for plasmonic resonances of one-dimensional electron systems, the findings for TAPP-Br indicate a push-back effect and therefore stronger confinement of the free charge carriers in the quasi-one-dimensonal channel due to the coverage by the flat TAPP-Br molecules. On the gold-doped Si(553)-Au surface TAPP-Br acts as counter dopant and increases the plasmonic signal.

Research paper thumbnail of C70 increases the plasmonic signal of gold-atom chains on Si(553)

Research paper thumbnail of Controlled Molecular Orientation of Inkjet Printed Semiconducting Polymer Fibers by Crystallization Templating

Research paper thumbnail of Impact of Metal-Optical Properties on Surface-Enhanced Infrared Absorption

The Journal of Physical Chemistry C

Research paper thumbnail of Chemical Identification of Individual Fine Dust Particles with Resonant Plasmonic Enhancement of Nanoslits in the Infrared

Research paper thumbnail of Surface pre-melting and surface flattening of Bi nanofilms on Si(111)-7×7

Surface Science

We report on the in situ observation of temperature-driven drastic morphology evolution and surfa... more We report on the in situ observation of temperature-driven drastic morphology evolution and surface pre-melting of the Bi(0 0 1) nanofilm deposited on the Si(1 1 1)-7 • 7 surface by use of spot-profile-analyzing low-energy electron diffraction (SPA-LEED). Surface step density of the single-crystalline, epitaxial Bi(0 0 1) film decreases above 350 K in a critical manner. On annealed Bi(0 0 1) films, we have detected surface pre-melting with a transition temperature of 350 K, which yields reversible diffraction intensity drop in addition to the harmonic Debye-Waller behavior. The observed surface flattening of the as-deposited film is driven by the increased amount of mobile adatoms created through the surface pre-melting.

Research paper thumbnail of One-Dimensional Plasmonic Excitations in Gold-Induced Superstructures on Si(553): Impact of Gold Coverage and Silicon Step Edge Polarization

The Journal of Physical Chemistry C