Weintraub Benjamin, Chang Sehoon, Singamaneni Srikanth, Han Won Hee, Choi Young Jin, Bae Joonho, Kirkham Melanie, Tsukruk Vladimir V, Deng Yulin
School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0245, USA.
Nanotechnology. 2008 Oct 29;19(43):435302. doi: 10.1088/0957-4484/19/43/435302. Epub 2008 Sep 22.
A simple, scalable, and cost-effective technique for controlling the growth density of ZnO nanorod arrays based on a layer-by-layer polyelectrolyte polymer film is demonstrated. The ZnO nanorods were synthesized using a low temperature (T = 90 °C), solution-based method. The density-control technique utilizes a polymer thin film pre-coated on the substrate to control the mass transport of the reactant to the substrate. The density-controlled arrays were investigated as potential field emission candidates. The field emission results revealed that an emitter density of 7 nanorods µm(-2) and a tapered nanorod morphology generated a high field enhancement factor of 5884. This novel technique shows promise for applications in flat panel display technology.
展示了一种基于逐层聚电解质聚合物薄膜来控制ZnO纳米棒阵列生长密度的简单、可扩展且经济高效的技术。ZnO纳米棒采用低温（T = 90 °C）、基于溶液的方法合成。密度控制技术利用预先涂覆在基板上的聚合物薄膜来控制反应物向基板的质量传输。对密度可控的阵列作为潜在场发射候选物进行了研究。场发射结果表明，7根纳米棒/µm(-2)的发射极密度和锥形纳米棒形态产生了5884的高场增强因子。这种新技术在平板显示技术应用中显示出前景。
