Department of Chemical Engineering, Columbia University, New York, New York 10027, United States.
Nano Lett. 2011 May 11;11(5):1976-80. doi: 10.1021/nl200286j. Epub 2011 Apr 8.
We present a theoretical description of how continuous monomer production affects the focusing of nanocrystal size distributions in solution. We show that sufficiently high monomer production rates can drive a decrease in the polydispersity even as the average nanocrystal size increases. This is in sharp contrast to Ostwald ripening, where polydispersity increases with mean crystal size. We interpret several experimental nanocrystal studies through our model and show how production-controlled growth promises exquisite control over the size and polydispersity of functional nanocrystals.
我们提出了一个理论描述，说明连续单体生产如何影响纳米晶体在溶液中的尺寸分布聚焦。我们表明，即使平均纳米晶体尺寸增加，足够高的单体生产速率也可以降低多分散性。这与奥斯特瓦尔德成熟过程形成鲜明对比，在奥斯特瓦尔德成熟过程中，多分散性随晶体尺寸的增加而增加。我们通过模型解释了几个实验纳米晶体研究，并展示了生产控制生长如何有望对功能纳米晶体的尺寸和多分散性进行精确控制。
