Zhang Tierui, Ge Jianping, Hu Yongxing, Yin Yadong
Department of Chemistry, University of California, Riverside, California 92521, USA.
Nano Lett. 2007 Oct;7(10):3203-7. doi: 10.1021/nl071928t. Epub 2007 Sep 14.
Hydrophobic inorganic nanocrystals have been transferred from organic solvent to aqueous solution through a robust and general ligand exchange procedure. Polyelectrolytes such as poly(acrylic acid) and poly(allylamine) are used to replace the original hydrophobic ligands on the surface of nanocrystals at an elevated temperature in a glycol solvent and eventually render the nanocrystals highly water soluble. The physical properties of the nanocrystals, such as superparamagnetism, photocatalytic activity, and photoluminescence, are maintained or improved after ligand exchange.
疏水性无机纳米晶体已通过一种稳健且通用的配体交换程序从有机溶剂转移至水溶液中。诸如聚丙烯酸和聚烯丙胺之类的聚电解质在二醇溶剂中于高温下用于取代纳米晶体表面上原有的疏水性配体，并最终使纳米晶体具有高度的水溶性。配体交换后，纳米晶体的物理性质，如超顺磁性、光催化活性和光致发光等得以保持或改善。
