本研究利用簡易之靜電紡絲技術配合溶-凝膠法製備氧化鋅奈米線，首先將高分子聚乙烯醇溶入醋酸鋅溶液中，形成前驅物溶膠，將此前驅物溶膠經靜電紡絲術形成一維結構，所製備之前驅物電紡絲經由煅燒處理移除有機相形成氧化鋅奈米線，藉由改變其前驅物溶膠特性、靜電紡絲製程參數(噴射距離、噴射速率)，煅燒處理溫度和時間以及升溫速率等，可瞭解各種參數對於氧化鋅電紡絲結構與性質的影響，並以熱重分析儀去分析電紡絲的熱性質，掃描式電子顯微鏡觀察其表面型貌，X-ray量測其成份以及晶面，陰極螢光激發光譜探討其氧化鋅電紡絲的光學性質，從X-ray分析得知氧化鋅電紡絲結構與結晶性會受到煅燒處理的影響，在電子顯微鏡下觀察所製備之氧化鋅電紡絲可發現生成的直徑藉由參數的改變可從500nm到90nm，直徑會隨著煅燒溫度升高與時間增長而變細，也會因前驅物導電特性變好而變細，陰極激發光譜證明氧化鋅在紫外光處(368nm)有明顯波峰，可見光激發則相對微弱，說明所製備之氧化鋅電紡絲結構與紫外光發光特性良好，並利用靜電紡絲術直接將前驅物電紡絲沉積在感測電極上形成電極間之架橋，並在煅燒處理後，對乙醇氣體進行感測特性的探討。

This paper reports a simple method for large-scale fabrication of ZnO nanowires by combining a sol-gel process and an electrospinning process. Gel containing polyvinyl acetate (PVA) and zinc acetate was first prepared as the precursor. The precursor was then electrospun to nanowires. The polymeric nanowires thus obtained were calcined to form ZnO nanowires. By varying the precursor gel properties, the electrospinning conditions (injection rate and spray distance), calcination temperature, and calcination time, the ZnO nanowires having desired characteristics were obtained. The nanowires were characterized using thermogravimetry analysis for the thermo properties, scanning electron microscopy for the morphology, X-ray diffractometry (XRD) and cathode luminescence spectrometry for the luminescence property. The XRD results show that crystal structure of zinc oxide nanowires largely depends on the calcination temperature and time. The SEM analysis reveals that the zinc oxide nanowires have diameters in the range of 90-500nm. The diameter of the zinc oxide nanowires decreases with increasing zinc acetate concentration, and also decreases as the calcination temperature and time increase. The CL results show that the ZnO nanowires obtained exhibit very weak visible band emission and very strong UV band emission at 368 nm, indicating a good structure quality. This electrospinning technique allows the direct placement of ZnO nanowires during their synthesis to bridge the sensor electrodes. Ethanol-sensing characteristics were also studied.

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