Synthesis of well-aligned ZnO nanowires by simple physical vapor deposition on c-oriented ZnO thin films without catalysts or additives

Abstract

Well-aligned ZnO nanowires were synthesized by simple physical vapor deposition using c-oriented ZnO thin films as substrates without catalysts or additives. The synthesized ZnO nanowires have two typical average diameters: 60nm in majority and 120nm in minority. They are about 4μm in length and well aligned along the normal direction of the substrate. Most of the synthesized ZnO nanowires are single crystalline in a hexagonal structure and grow along the [001] direction. The c-oriented ZnO thin films control the growth direction. Photoluminescence spectrum was measured showing a single strong ultraviolet emission (380nm). Such result indicates that the ZnO nanowire arrays can be applied to excellent optoelectronic devices.

High-quality ZnO nanowire arrays directly synthesized from Zn vapor deposition without catalyst

“…1(b), it is clearly seen that there are two typical diameters among those NWs. The majority of those NWs are individual wires, which have diameters about 120~150 nm, and the other NWs with diameters are in the range of 200~250 nm which can be due to the combination of two thinner NWs [19,20]. However, those NWs have a highly uniform diameter along their lengths, as shown in Fig.…”

Research Progress in Preparation and Applications of ZnO Nanowire/rod Arrays by Hydrothermal Method

“…为了制备出高质量 ZnO 纳米线/棒阵列, 需要选择 良好的制备方法, 而制备纳米线阵列的方法主要分为气 相法和液相法, 其中气相法包括碳热还原法 [15] 、物理气 相沉积法 [16] 和脉冲激光沉积法 [17] 等, 而液相法包括水 热法 [18] 、电化学沉积法 [19] 和模板法 [20] 2 两步水热法可控制备 ZnO 纳米线/棒阵列 水热法(hydrothermal method)属于液相法中的一种, 是指在密封的容器中以水作为溶剂, 并在一定温度和压 强 条 件 下 进 行 的 一 种 化 学 反 应 [21] . 自 从 2003 年 Vayssieres 等 [22,23] 首先将水热法应用于 ZnO 纳米棒阵列 的制备以来, 近几年基于水热法制备 ZnO 纳米线/棒阵 列的工艺得到了很大的发展和改进, 而目前基于两步水 热法在多种基底上可控制备高质量 ZnO 纳米线/棒阵列 受到了越来越多的关注.…”

Study on synthesis and optical properties of Al-doped ZnO hierarchical nanostructures

“…So far, lots of ZnO nanostructures have been fabricated, such as nanobelts, 3 nanoneedles, 4 nanorods, 5 nanoprisms, 6 nanonails, 7 nanotubes, 8 and so on. Many methods have been used to synthesize ZnO nanostructures, including chemical vapor deposition, 9 metal-organic chemical vapor depositions, 10 solution-grown methods, 11 sol-gel synthesis methods, 12 electrochemistry depositions, 13 physical vapor depositions, 14 and laser-assisted growth methods. 15 Although there were a mass of literatures concerning the fabrication of ZnO nanostructures, few reports were about the synthesis of Al-ZnO hierarchical nanostructures.…”