Browsing Electronic & Electrical Eng (Scholarly Publications) by Subject "Nanoscience & Materials"
Now showing items 1-20 of 62
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Accounting for the Local Field When Determining the Dielectric Loss Spectra of Metals in the Region of the Frequencies of Volume, Surface, and Localized Plasmon Oscillations
(2020)The optical constant of bulk metal is used to determine the dispersion of the local field under one-dimensional (1D), two-dimensional (2D) and three-dimensional (3D) confinement. 3D confinement, expressed as ε 2 m i c ( ω ... -
Antiferroelectric and ferroelectric orderings in frustrated chiral tilted smectics and a continuous change from anticlinic SmCA* to synclinic SmC*
(2010)In a frustrated binary-mixture system of ferroelectric and antiferroelectric liquid crystals, where the border line between SmCA* and SmC* in the temperature-concentration phase diagram runs almost parallel to the ordinate ... -
Characterisation of thin film silicon films deposited by plasma enhanced chemical vapour deposition at 162MHz, using a large area, scalable, multi-tile-electrode plasma source
(2011)Large area (600 ? 720 mm) depositions of hydrogenated microcrystalline silicon (?c-Si:H) have been achieved at high deposition rates using a scalable, multi-tile electrode topology. Depositions have shown local results of ... -
Characterization of Rapid Melt Growth (RMG) Process for High Quality Thin Film Germanium on Insulator
(2012)Germanium is one of the most promising materials for high performance infra-red photovoltaic devices. High quality singlecrystal germanium on insulator structures can be produced by a Rapid Melt Growth process. Experiments ... -
Composition and strain in thin Si1-xGex virtual substrates measured by micro-Raman spectroscopy and X-ray diffraction
(2011)Micro-Raman spectroscopy was employed for the determination of the germanium content, x and strain, , in ultrathin SiGe virtual substrates grown directly on Si by molecular beam epitaxy. The growth of highly relaxed ... -
Concentration-dependent fluorescence emission of quercetin
(2021)Quercetin (Q) is an important antioxidant with high bioactivity and the potential of being used as SARS-CoV-2 inhibitor. The fluorescence (FL) emission from Q solutions made with different polar and non-polar solvents ... -
Design of three-component one-dimensional photonic crystals for alteration of optical contrast and omni-directional reflection
(2010)In this study, three-component One-Dimensional (1D) Photonic Crystal (PC) structures were investigated by modeling them as two-component PCs with an additional regular layer. The Gap Map approach and the Transfer Matrix ... -
Design, fabrication and optical characterization of Fabry-Pérot tunable resonator based on microstructured Si and liquid crystal
(2010)The results of a simulation of the optical properties of a silicon Fabry-Perot resonator (with liquid crystal filler in the cavity), operated on the shift of the interference bands in the infrared range are presented. The ... -
Design, fabrication and Optical Characterization of Multi-Component Photonic Crystals for Integrated Si Microphotonics
(2011)This paper reports on investigation and possible applications of the optical elements based on one-dimensional (1D) multi-component photonic crystal (PCs). The gap map approach and the transfer matrix method were used in ... -
Dielectric and electro-optic studies of a bimesogenic liquid crystal composed of bent-core and calamitic units
(2014)A bimesogen, BR1, composed of a bent-core and calamitic unit, linked laterally via a flexible spacer is investigated by dielectric and electro-optic techniques. X-ray results show the presence of clusters in the nematic ... -
Doped quantum dots for photovoltaics
(OSA, 2014) -
Double-Cavity Fabry-Perot Resonators Based on One-Dimensional Silicon Photonic Crystals
(AIP Publisher, 2018) -
Electrically tunable Fabry-Pérot resonator based on microstrcutured Si containing liquid crystal
(2012)We have built Fabry-Perot resonators based on mi-crostructured silicon and a liquid crystal. The devices exhibit tuning of the resonance peaks over a wide range, with relative spectral shifts of up to ??/? = 10%. In order ... -
Electrooptic, pyroelectric, dielectric spectroscopic studies of nematic and twist-bend nematic phases of achiral hockey-shaped bent-core liquid crystal
(2022)Experimental and theoretical investigations of the twist-bend nematic (NTB) phase in liquid crystals have recently received significant attention for reasons of unusual and interesting characteristics of the NTB. Though ... -
Electrospun Fibres of Chitosan/PVP for the effective chemotherapeutic drug delivery of 5-Fluorouracil
(2021)Electrospun nanofibrous mats consisting of chitosan (CS) and polyvinylpyrrolidone (PVP) were constructed. Tuning of solution and process parameters was performed and resulted in an electrospun system containing a 6:4 ... -
Enhanced FTIR Spectroscopy of Biological Liquid Samples Confined Between Ge Hemispherical ATR Element and Al Coated Glass Substrate
(2020)We demonstrated a modified SEIRA approach, which can be easily utilized for measurements of various liquid samples, including biological specimens. In addition, the possibility of using Al, known as non-typical ... -
Enhancement of photoluminescence signal from ultrathin layers with silicon nanocrystals
(2012)Using the model of oscillating dipoles, we simulated the photoluminescence intensity of a triple-layered structure where the silicon nanocrystals layer was enclosed by buffer and capping silicon dioxide layers. It was ... -
Fabrication of one-dimensional photonic crystals by photoelectrochemical etching of silicon
(2010)The conditions of formation of deep periodic trenches by photoelectrochemical etching of n-Si (100) with linear seeds on the surface are analyzed. Criteria for the proper choice of the period of seed grooves and the etching ... -
Formation and development of nanometer-sized cybotactic clusters in bent-core nematic liquid crystalline compounds
(2018)Two homologue achiral bent-core liquid crystals (LCs), BCN66 and BCN84, in their nematic phases are studied by dielectric spectroscopy in the frequency range 10 Hz–10 MHz. In each of these compounds, two relaxation processes ...