Nanocrystal-Functionalized Materials for Optical Applications

化学系授予布兰迪斯大学的这项初创奖学金支持了林文斌教授的研究。这项研究的主题是用于光学应用的纳米晶功能材料。由于高表面张力，纳米晶本质上是不稳定的，需要与其他基质结合以提高稳定性。这项研究考察了两种通过形成纳米晶功能化聚合物和自组装多层膜来稳定纳米晶的新方法。表面修饰方法被用来制备以三烷氧基硅烷或带负电荷的烷基磺酸基团封端的纳米晶。这些纳米晶功能化的前驱体可用于通过硅氧烷键合或交替吸附聚合阳离子和烷基磺酸盐衍生的纳米晶来形成自组装的纳米晶多层。这项研究将有助于更好地理解纳米晶的基本性质，并生产出有趣的纳米晶功能化材料。这类材料在非线性光学材料、光催化剂和发光二极管等方面有着广阔的应用前景。

This starter grant award of the Chemistry Division to Brandeis University supports the research of Professor Wenbin Lin. The theme of the research is nanocrystal-functionalized materials for optical applications. Nanocrystallites are intrinsically unstable due to high surface tension and need to be incorporated into other matrices to enhance stability. This research examines two new approaches to stabilizing nanocrystals by forming nanocrystal-functionalized polymers and self-assembled multilayers. A surface modification approach is used to prepare nanocrystals terminated with trialkoxysilanes or negatively charged alkylsulfonate groups. These nanocrystal-functionalized precursors are used to form self-assembled multilayers of nanocrystals via siloxane linkages or by alternate adsorption of polymeric cations and alkylsulfonate-derivatized nanocrystals. The research will lead to better understanding of the fundamental properties of nanocrystals and to production of interesting nanocrystal-functionalized materials. Such materials hold the promise for applications as nonlinear optical materials, photo-catalysts, and light-emitting diodes.