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A novel lifting-off method of ZnO nanowires from Si substrate and embedded in flexible films have been proposed in this study. Compared with peeling-off method by polydimethyl- siloxane (PDMS), the embedded ZnO nanowires may suffer from external forces to change the dimension. The shape of ZnO nanowires remained almost unchanged after using the novel lifting-off process. Flexible films served as the...
The use of carbon nanotubes (CNTs) for electrical interconnections is hinder by the possibility of growing CNT directly onto metallization. The introduction of barrier layer between catalyst and metallization is thus essential to permit the direct growth of vertically aligned CNT bundles using CVD approaches. As a result, the resultant CNT bundle resistivity is not only a function of the densities...
Ordered nanostructures of conventional plasmonic metals (Ag, Au etc.) in a dielectric matrix are candidate materials for fabrication of metamaterials. Control over the dimensions of these building blocks offers tunability in the metamaterial design. To that effect we demonstrated the large area fabrication of poly(styrene-b-4-vinyl pyridine) (PS-b-P4VP) diblock copolymer films wherein the self assembly...
Optical radiation efficiency is the ratio of scattering cross section to extinction cross section. Optical radiation efficiency has been calculated, using classical electrostatics, for spherical nanoparticles of Ag, Au, Cu, Co, Cr, Ni, Pd, Pt, Sn, and Ti. The particle diameter was varied and calculated for the wavelengths in the range of 400–1200nm. The change in radiation efficiency in glass medium...
In this study, we proposed a new sensing configuration for enhancing the surface plasmon resonance (SPR) based on graphene and gold nanorods (Au NRs). Both analytical modeling based on Fresnel equations and numerical analyses through finite element method (FEM) are performed to optimize the number of graphene layers and the aspect ratio (AR) of Au NRs. The improved sensitivity up to 106 degree/ RIU...
We proposed a concept of meta-surface composed of sub-wavelength groove arrays in gold film on chromium(Cr) layer with designable parameters, which allows for flexible manipulations of the Surface Plasmon Polaritons (SPPs). The SPP propagation and dispersion properties were systematically studied in the theoretical meta-surface scheme by numerical simulations. For details, a conventional SPP wave...
Temperature distribution of microheaters during electromigration (EM) was observed by near-infrared (NIR) charge coupled device (CCD) imaging system. The temperature of the hot spot, located at the tip of the microheater, was well controlled with varying the applied voltage. Microheaters were broken during EM processes, and breakdown region clearly corresponded to the position of the hot spot. These...
In this paper, we introduce an electro-chemical doping method of amorphous selenium (a-Se) using NaClaq. Recently, an a-Se photovoltaic device fabricated using this method [1], has been announced and opened up the potential of a new impurity doping method. This study will further explore its possibilities by doping chlorine (Cl) and sodium (Na) and aim to fabricate a p-n junction by reversing the...
We demonstrate experimentally the improvement of the external quantum efficiency (EQE) and current-matching of the triple-junction GaAs-based solar cell using periodic-patterns incorporated with random nano-sized indium-nanoparticles plasmonics. The average EQE decreased of −9.8% in top-cell and increased of +2.4% in middle-cell were obtained as the solar cell with periodic-patterns random nano-size...
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