Jim Davazoglou | National Centre of Scientific Research "DEMOKRITOS" (original) (raw)

Jim Davazoglou

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Papers by Jim Davazoglou

Research paper thumbnail of Structure and electrical properties of selectively chemically vapor deposited vanadium oxide films from Vanadium tri-i-propoxy oxide vapors

Surface and Coatings Technology, 2007

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Research paper thumbnail of Polymer photonic technologies for optical communications

International Conference on Transparent Optical Networks, 2013

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Research paper thumbnail of Hot-wire assisted chemical vapor deposition of Cu by direct-liquid-injection of CupraSelect®

Surface and Coatings Technology, 2007

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Research paper thumbnail of Emergence of ambient temperature ferroelectricity in meso-tetrakis(1-methylpyridinium-4-yl)porphyrin chloride thin films

Applied Physics Letters, 2013

ABSTRACT Here, we demonstrate that the meso-tetrakis(1-methylpyridinium-4-yl)porphyrin chloride, ... more ABSTRACT Here, we demonstrate that the meso-tetrakis(1-methylpyridinium-4-yl)porphyrin chloride, [H2TMPyP]4+Cl4, with a face-to-face orientation directed along a single direction displays ferroelectric properties at room temperature. This is attributed to its spontaneous polarization, due to an extensive hydrogen-bonded network. From C-V measurements, a remnant polarization of approximately 0.5 μC cm−2 was estimated for pristine porphyrin film, which increases linearly up to about 1.7 μC cm−2 after applying 2 V at the top electrode and further to 9.6 μC cm−2 after 5 V positive poling. This large—for practical utilization—level of remnant polarization of [H2TMPyP]4+Cl4 makes it promising for future applications.

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Research paper thumbnail of Copper metallization based on direct-liquid-injection hot-wire CVD

Microelectronic Engineering, 2007

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Research paper thumbnail of Thermodynamic study and characterization of low pressure chemically vapor deposited silicon oxynitride films from tetraethylorthosilicate, dichlorosilane and ammonia gas mixtures

Thin Solid Films, 2003

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Research paper thumbnail of Hot-wire substoichiometric tungsten oxide films deposited in hydrogen environment with n-type conductivity

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Research paper thumbnail of Interface engineering for efficient organic optoelectronic devices using nanostructured transition metal oxides

2011 International Semiconductor Device Research Symposium (ISDRS), 2011

With the advent of nanotechnology the synthesis of nanostructured materials and their useful appl... more With the advent of nanotechnology the synthesis of nanostructured materials and their useful applications have become increasingly prominent. Nanostructuring can enhance the performance of functional materials and provides them with unique properties [1]. Exceptional qualities of nanostructured materials compared to the bulk include: (i) increased surface-to-volume ratio, which provides more surface area for both chemical and physical interactions, (ii) significantly altered surface energies that allow tuning and engineering of the materials properties, as atomic species near the surface have different bond structures than those embedded in the bulk, and (iii) quantum confinement effects, due to the inherently small size of nanostructured materials, that significantly influences, charge transport, electronic band structure and optical properties.

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Research paper thumbnail of Influence of texture on the absorption threshold of LPCVD silicon films

Le Journal de …, 2001

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Research paper thumbnail of Study of the electronic structure of amorphous and crystallized low pressure chemically vapor deposited silicon films near the absorption threshold

Journal of applied physics, 2002

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Research paper thumbnail of Optical absorption threshold of low pressure chemically vapor deposited silicon oxynitride films from SiCl< sub> 2</sub> H< sub> 2</sub> NH< sub> 3</sub> N< …

Thin solid films, 2003

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Research paper thumbnail of Optical properties of very thin (< 100 nm) sol–gel TiO< sub> 2</sub> films

Thin solid films, 1998

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Research paper thumbnail of Optical properties of SnO< sub> 2</sub> thin films grown by atmospheric pressure chemical vapour deposition oxiding SnCl< sub> 4</sub>

Thin Solid Films, 1997

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Research paper thumbnail of Structure and electrical properties of selectively chemically vapor deposited vanadium oxide films from Vanadium tri-i-propoxy oxide vapors

Surface and Coatings Technology, 2007

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Research paper thumbnail of Polymer photonic technologies for optical communications

International Conference on Transparent Optical Networks, 2013

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Hot-wire assisted chemical vapor deposition of Cu by direct-liquid-injection of CupraSelect®

Surface and Coatings Technology, 2007

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Emergence of ambient temperature ferroelectricity in meso-tetrakis(1-methylpyridinium-4-yl)porphyrin chloride thin films

Applied Physics Letters, 2013

ABSTRACT Here, we demonstrate that the meso-tetrakis(1-methylpyridinium-4-yl)porphyrin chloride, ... more ABSTRACT Here, we demonstrate that the meso-tetrakis(1-methylpyridinium-4-yl)porphyrin chloride, [H2TMPyP]4+Cl4, with a face-to-face orientation directed along a single direction displays ferroelectric properties at room temperature. This is attributed to its spontaneous polarization, due to an extensive hydrogen-bonded network. From C-V measurements, a remnant polarization of approximately 0.5 μC cm−2 was estimated for pristine porphyrin film, which increases linearly up to about 1.7 μC cm−2 after applying 2 V at the top electrode and further to 9.6 μC cm−2 after 5 V positive poling. This large—for practical utilization—level of remnant polarization of [H2TMPyP]4+Cl4 makes it promising for future applications.

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Research paper thumbnail of Copper metallization based on direct-liquid-injection hot-wire CVD

Microelectronic Engineering, 2007

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Research paper thumbnail of Thermodynamic study and characterization of low pressure chemically vapor deposited silicon oxynitride films from tetraethylorthosilicate, dichlorosilane and ammonia gas mixtures

Thin Solid Films, 2003

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Hot-wire substoichiometric tungsten oxide films deposited in hydrogen environment with n-type conductivity

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Interface engineering for efficient organic optoelectronic devices using nanostructured transition metal oxides

2011 International Semiconductor Device Research Symposium (ISDRS), 2011

With the advent of nanotechnology the synthesis of nanostructured materials and their useful appl... more With the advent of nanotechnology the synthesis of nanostructured materials and their useful applications have become increasingly prominent. Nanostructuring can enhance the performance of functional materials and provides them with unique properties [1]. Exceptional qualities of nanostructured materials compared to the bulk include: (i) increased surface-to-volume ratio, which provides more surface area for both chemical and physical interactions, (ii) significantly altered surface energies that allow tuning and engineering of the materials properties, as atomic species near the surface have different bond structures than those embedded in the bulk, and (iii) quantum confinement effects, due to the inherently small size of nanostructured materials, that significantly influences, charge transport, electronic band structure and optical properties.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Influence of texture on the absorption threshold of LPCVD silicon films

Le Journal de …, 2001

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Research paper thumbnail of Study of the electronic structure of amorphous and crystallized low pressure chemically vapor deposited silicon films near the absorption threshold

Journal of applied physics, 2002

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Optical absorption threshold of low pressure chemically vapor deposited silicon oxynitride films from SiCl< sub> 2</sub> H< sub> 2</sub> NH< sub> 3</sub> N< …

Thin solid films, 2003

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Research paper thumbnail of Optical properties of very thin (< 100 nm) sol–gel TiO< sub> 2</sub> films

Thin solid films, 1998

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Research paper thumbnail of Optical properties of SnO< sub> 2</sub> thin films grown by atmospheric pressure chemical vapour deposition oxiding SnCl< sub> 4</sub>

Thin Solid Films, 1997

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