Large Scale Synthesis of High Quality Semiconductor Nanocrystals from Metal Oxides

化学部的先进材料计划支持阿肯色州大学获得该奖项，以研究纳米颗粒晶体生长的基本机制和方法，使用这些纳米颗粒的尺寸和形状依赖的光学特性。有了这个奖项，Xiaogang Peng教授将开发基于绿色化学的方法，用于从毒性较低的前体氧化镉大规模合成纳米尺寸的硒化镉晶体，这些方法将与目前使用的前体二甲基镉的方法有很大不同，二甲基镉是有毒的，不稳定的和昂贵的。 该奖项将有助于开发新的方法，用于大规模合成尺寸和形状均匀的半导体纳米晶体，用于电光器件。研究生和本科生都将从该奖项提供的材料化学培训和研究机会中受益匪浅。通过该奖项，将利用这些晶体的尺寸和形状依赖的光学特性来研究纳米颗粒晶体的生长。 以氧化镉为前驱体，有望大规模制备纳米级硒化镉晶体。 这种基于绿色化学的方法将是成本有效的，并且使用更少的毒性和更稳定的前体。研究生和本科生将大大受益于该奖项在纳米晶体生长和表征提供的培训和研究机会。

The Advanced Materials Program in the Chemistry Division supports this award to University of Arkansas to study the basic mechanism and method of nanoparticle crystal growth using size- and shape-dependent optical properties of these nano-particles. With this award, Professor Xiaogang Peng will develop green chemistry-based methods for the large scale synthesis of nano-sized cadmium selenide crystals from the less toxic precursor cadmium oxide, and these methods will be quite different from the presently used methods with precursor dimethyl cadmium, which is toxic, unstable and expensive. The award will help to develop new methods for the large-scale synthesis of semiconductor nanocrystals of uniform size and shape for applications in electrooptic devices. Both graduate and undergraduate students will greatly benefit from the training and research opportunities provided by this award in materials chemistry.With this award, nanoparticle crystal growth will be studied using size- and shape-dependent optical properties of these crystals. Nano-sized cadmium selenide crystal will be prepared in large scale using cadmium oxide as the precursor. This green chemistry-based method will be cost effective, and used less toxic and much more stable precursor. Both graduate and undergraduate students will greatly benefit from the training and research opportunities provided by this award in nano-crystal growth and characterization.