Jim Davazoglou | National Centre of Scientific Research "DEMOKRITOS" (original) (raw)
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Papers by Jim Davazoglou
Surface and Coatings Technology, 2007
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International Conference on Transparent Optical Networks, 2013
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Surface and Coatings Technology, 2007
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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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Microelectronic Engineering, 2007
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Thin Solid Films, 2003
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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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Le Journal de …, 2001
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Journal of applied physics, 2002
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Thin solid films, 2003
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Thin solid films, 1998
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Thin Solid Films, 1997
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Surface and Coatings Technology, 2007
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International Conference on Transparent Optical Networks, 2013
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Surface and Coatings Technology, 2007
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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.
Bookmarks Related papers MentionsView impact
Microelectronic Engineering, 2007
Bookmarks Related papers MentionsView impact
Thin Solid Films, 2003
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
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
Le Journal de …, 2001
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Journal of applied physics, 2002
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Thin solid films, 2003
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Thin solid films, 1998
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Thin Solid Films, 1997
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