M. Stefancich | Consiglio Nazionale delle Ricerche (CNR) (original) (raw)
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Papers by M. Stefancich
J. Mater. Chem. C, 2015
ABSTRACT Composites of paraffin wax and polydimethylsioxane (PDMS) have previously been demonstra... more ABSTRACT Composites of paraffin wax and polydimethylsioxane (PDMS) have previously been demonstrated to exhibit thermally-induced switching between a transparent ‘on’ state and opaque ‘off’ state; however, the transmittance of the on state in previously investigated composites was found to decrease with increasing wax content, limiting the achievable off-on contrast. We present a new paraffin-PDMS composite formulation that exhibits essentially no decrease in on-state transparency up to a 10% wax concentration. We furthermore identify the underlying cause of the switching as a microstructural transformation from a homogeneous, transparent state to an inhomogeneous, light-scattering state as a result of the phase transition of the paraffin. We then present a model based on the theory of turbid media that allows for the estimation of the scattering power of a composite of known composition based on easily observed parameters, and suggests ways in which the contrast between the on and off states may be further enhanced.
Thin Film Solar Technology V, 2013
Journal of Applied Physics, 2014
Progress in Photovoltaics: Research and Applications, 2009
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2005
Journal of Applied Physics, 2002
A semiclassical model for Schottky contacts to be applied to nanosized polycrystalline n-type sem... more A semiclassical model for Schottky contacts to be applied to nanosized polycrystalline n-type semiconductors was developed. To this purpose we determined the density of surface states as a function of the mean grain radius, which establishes the Schottky barrier height. The intergranular potential shape was investigated in depletion approximation under spherical geometry and a critical revision of this method was
Nanoantennas, coupled to rectifying nanodiodes ("rectennas"), could be used for convert... more Nanoantennas, coupled to rectifying nanodiodes ("rectennas"), could be used for converting broadband visible/near-infrared energy to direct current, and could serve as fast, high-Q infrared detectors at designed wavelengths. We study and model the efficiency of antennas ...
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2005
In the last years, the research on channeling of relativistic particles has progressed considerab... more In the last years, the research on channeling of relativistic particles has progressed considerably. A significant contribution has been provided by the development of techniques for quality improvement of the crystals. In particular, a planar etching of the surfaces of the silicon crystals proved useful to remove the superficial layer, which is a region very rich in imperfections, in turn
J. Mater. Chem. C, 2015
ABSTRACT Composites of paraffin wax and polydimethylsioxane (PDMS) have previously been demonstra... more ABSTRACT Composites of paraffin wax and polydimethylsioxane (PDMS) have previously been demonstrated to exhibit thermally-induced switching between a transparent ‘on’ state and opaque ‘off’ state; however, the transmittance of the on state in previously investigated composites was found to decrease with increasing wax content, limiting the achievable off-on contrast. We present a new paraffin-PDMS composite formulation that exhibits essentially no decrease in on-state transparency up to a 10% wax concentration. We furthermore identify the underlying cause of the switching as a microstructural transformation from a homogeneous, transparent state to an inhomogeneous, light-scattering state as a result of the phase transition of the paraffin. We then present a model based on the theory of turbid media that allows for the estimation of the scattering power of a composite of known composition based on easily observed parameters, and suggests ways in which the contrast between the on and off states may be further enhanced.
Thin Film Solar Technology V, 2013
Journal of Applied Physics, 2014
Progress in Photovoltaics: Research and Applications, 2009
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2005
Journal of Applied Physics, 2002
A semiclassical model for Schottky contacts to be applied to nanosized polycrystalline n-type sem... more A semiclassical model for Schottky contacts to be applied to nanosized polycrystalline n-type semiconductors was developed. To this purpose we determined the density of surface states as a function of the mean grain radius, which establishes the Schottky barrier height. The intergranular potential shape was investigated in depletion approximation under spherical geometry and a critical revision of this method was
Nanoantennas, coupled to rectifying nanodiodes ("rectennas"), could be used for convert... more Nanoantennas, coupled to rectifying nanodiodes ("rectennas"), could be used for converting broadband visible/near-infrared energy to direct current, and could serve as fast, high-Q infrared detectors at designed wavelengths. We study and model the efficiency of antennas ...
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2005
In the last years, the research on channeling of relativistic particles has progressed considerab... more In the last years, the research on channeling of relativistic particles has progressed considerably. A significant contribution has been provided by the development of techniques for quality improvement of the crystals. In particular, a planar etching of the surfaces of the silicon crystals proved useful to remove the superficial layer, which is a region very rich in imperfections, in turn