In situ and ex situ observations of the growth dynamics of single perylene nanocrystals in water.
In situ and ex situ observations of the growth dynamics of single perylene nanocrystals in water.
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DOI：
10.1021/ja0654276
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发表时间：
2006-11
影响因子：
15
通讯作者：
T. Tachikawa;Hae-Ryong Chung;A. Masuhara;H. Kasai;H. Oikawa;H. Nakanishi;M. Fujitsuka;T. Majima
中科院分区：
文献类型：
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作者：
T. Tachikawa;Hae-Ryong Chung;A. Masuhara;H. Kasai;H. Oikawa;H. Nakanishi;M. Fujitsuka;T. Majima
采用原位和非原位单粒子荧光测量方法研究了再沉淀法制备的荧光性苝纳米晶的生长动力学。通过单粒子荧光光谱测量，观察到随着老化时间的增加，在发射最大值的红移。纳米晶的数量和尺寸随着老化时间的增加而增加。得出的结论是，亚稳态中间体（例如团簇和初始纳米颗粒）与苝纳米晶体的成核和生长的早期阶段有关。
The growth dynamics of fluorescent perylene nanocrystals, which are fabricated by the reprecipitation method, was investigated using in situ and ex situ single-particle fluorescence measurements. A red shift in the emission maxima as the aging time increased was observed by single-particle fluorescence spectral measurements. The number and size of the nanocrystals increased with the increasing aging time in water. It was concluded that the metastable intermediates, such as clusters and initial nanoparticles, are relevant for the early stages of nucleation and growth of the perylene nanocrystals.