Density-controlled growth of ZnO nanowires via nanoparticle-assisted pulsed-laser deposition and their optical properties
Density-controlled growth of ZnO nanowires via nanoparticle-assisted pulsed-laser deposition and their optical properties
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通过纳米颗粒辅助脉冲激光沉积实现 ZnO 纳米线的密度控制生长及其光学特性
DOI：
10.1143/jjap.47.741
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发表时间：
2008-01-01
影响因子：
1.5
通讯作者：
Okada, Tatsuo
中科院分区：
文献类型：
--
作者：
Guo, Ruiqian;Nishimura, Jun;Okada, Tatsuo
采用纳米粒子辅助脉冲激光沉积（NAPLD）技术成功合成了密度可控的垂直排列ZnO纳米线，将气相中烧蚀物质冷凝形成的纳米粒子传输到衬底上，纳米粒子在密度控制中发挥着重要作用。详细研究了合成条件对ZnO纳米线密度和光学性质的影响。随着重复频率和激光能量的增加，在气相中生成的纳米颗粒数量增多，从而可以得到更高密度的ZnO纳米线。密度控制的生长还取决于衬底-靶距离。由于其优异的结晶性和缺氧缺陷，从所有获得的纳米线观察到在约390 nm处的UV发射，而在500 nm附近没有可见荧光。
Vertically aligned ZnO nanowires with controllable density were successfully synthesized by nanoparticle-assisted pulsed-laser deposition (NAPLD), by which nanoparticles formed in the gas phase by the condensation of the ablated species are transported onto the substrate, and nanoparticles play an important role in density control. The effects of synthesis conditions on the density and optical properties of ZnO nanowires were investigated in detail. With the increase in repetition rate and laser energy, ZnO nanowires with a higher density can be obtained as a result of a larger quantity of nanoparticles formed in the gas phase. The density-controlled growth also depends on substrate-target distance. UV emission was observed from all the obtained nanowires at about 390 nm without visible fluorescence near 500 nm due to their excellent crystallinity and the oxygen-deficient defect.