Guangwei Qu

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ZnO microwires have been synthesized by a simple chemical vapour deposition method. The morphology and optical properties were investigated by scanning electron microscopy, photoluminescence, and Raman spectrum, respectively. The strong ultraviolet emission with the weak deep-level emission observed in the photoluminescence spectrum indicates that the ZnO(More)
We present a simple one-step selective liquid-phase epitaxy (LPE) method to prepare peelable GaAs pyramidal microtips for compact scanning near-field optical microscopy (SNOM). A high Al content AlGaAs thin layer, as an etching sacrificial layer, is firstly selectively grown in periodic square windows of SiO2 mask deposited on GaAs substrate, and then GaAs(More)
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