Tsay James M, Doose Sören, Pinaud Fabien, Weiss Shimon
Department of Chemistry and Biochemistry, and Department of Physiology, University of California at Los Angeles, Los Angeles, California 90095, USA.
J Phys Chem B. 2005 Feb 10;109(5):1669-74. doi: 10.1021/jp046828f.
The composition and structure of inorganic shells grown over CdSe semiconductor nanocrystal dots and rods were optimized to yield enhanced photoluminescence properties after ligand exchange followed by coating with phytochelatin-related peptides. We show that, in addition to the peptides imparting superior colloidal properties and providing biofunctionality in a single-step reaction, the improved shells and pretreatment with UV irradiation resulted in high quantum yields for the nanocrystals in water. Moreover, peptide coating caused a noticeable red-shift in the absorption and emission spectra for one of the tested shells, suggesting that exciton-molecular orbital (X-MO) coupling might take place in these hybrid inorganic-organic composite materials.
对生长在CdSe半导体纳米晶点和棒上的无机壳层的组成和结构进行了优化，以便在配体交换后用植物螯合肽相关肽进行包覆，从而产生增强的光致发光特性。我们表明，除了肽在一步反应中赋予优异的胶体性质并提供生物功能外，改进的壳层和紫外线照射预处理使纳米晶体在水中具有高量子产率。此外，肽包覆导致其中一个测试壳层的吸收光谱和发射光谱出现明显的红移，这表明在这些无机-有机杂化复合材料中可能发生了激子-分子轨道（X-MO）耦合。
