High aspect ratio silver nanowires (Ag NWs) were successfully synthesized by CuCl2-mediated synthesis. Scanning electron microscopy (SEM) and X-Ray diffraction were employed to investigate the morphology and structure of the Ag products, respectively. Suspensions of Ag NW in ethanol were coated on glass substrates by Meyer rod coating to fabricate transparent conducting electrodes (TCE’s). The electrodes were then plasma treated at a power of 75 W. The effects of increasing plasma treatment time and oxygen exposure on the sheet resistance of the transparent electrodes were investigated. A sheet resistance of 8 Ω/sq with an optical transmittance of 80 % at 550nm was obtained for an electrode with a nanowire density of 0.18 mg/cm2 after 5 mins of plasma (Ar) exposure.
We present threefold enhancement of terahertz emission from silicon nanowire (SiNW)-coated gallium-arsenide photoconductive antenna over its uncoated counterpart. The enhancement is attributed to the increased photoabsorption, and possibly additional photoconductive pathways induced by the SiNWs.
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