Methods for precise and predictable modification of previously synthesized nanocrystals. The methods rely on the solubility behavior of crystalline materials to provide for controlled reversal of the nanocrystal growth process (i.e., dissolution). A method for post-synthesis modification of colloidal nanocrystals includes (1) providing a first nanocrystal having a first size and a first shape, (2) forming a reaction mixture that includes the nanocrystal, at least one ligand capable of binding to at least one component of the nanocrystal, at least one solvent, and an inert gas atmosphere, and (3) modifying the size and/or shape of the nanocrystal in the reaction mixture for a period of time at a temperature in a range from about 100° C. to about 240° C. so as to produce at least a second nanocrystal having a second size and/or a second shape.
对先前合成的纳米晶体进行精确和可预测改性的方法。这些方法依赖于晶体材料的溶解行为,以实现纳米晶体生长过程的可控逆转(即溶解)。合成后修饰胶体纳米晶体的方法包括:(1) 提供具有第一尺寸和第一形状的第一纳米晶体;(2) 形成反应混合物,其中包括纳米晶体、至少一种能够与纳米晶体的至少一种成分结合的
配体、至少一种溶剂和惰性气体环境;(3) 在约 100°C 至约 240°C 的温度范围内,在一段时间内修饰反应混合物中纳米晶体的尺寸和/或形状。至约 240 摄氏度范围内的温度下改变反应混合物中纳米晶体的尺寸和/或形状一段时间,以产生至少具有第二尺寸和/或第二形状的第二纳米晶体。