Choi Jonghoon, Wang Nam Sun, Reipa Vytas
Biochemical Science Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA.
Langmuir. 2009 Jun 16;25(12):7097-102. doi: 10.1021/la9001829.
An efficient synthesizing procedure of photoluminescent silicon nanocrystals is demonstrated by means of ultrasound assisted electrochemical octyltrichlorosilane reduction that produces octane terminated Si nanocrystals in a single step. The described procedure allows one to make Si nanocrystals with alkyl surface termination and is clean, relatively simple, and potentially scalable to industrial quantities. High resolution transmission electron microscopy, energy dispersive X-ray spectroscopy, UV-vis absorbance, Fourier transform infrared spectroscopy, and photoluminescence spectroscopy are employed to characterize the synthesized photoluminescent Si nanocrystals. Resulting octyl termination provides a stable passivation and could serve as a platform for further particle functionalization. Electrochemical chlorosilane reduction potentially could address the requirement for stable photoluminescent Si nanocrystals in diverse applications.
通过超声辅助电化学还原三氯辛基硅烷，在一步反应中制备出以辛烷封端的硅纳米晶体，展示了一种高效合成光致发光硅纳米晶体的方法。所描述的方法能够制备出具有烷基表面封端的硅纳米晶体，且该方法清洁、相对简单，并且有可能扩大到工业生产规模。利用高分辨率透射电子显微镜、能量色散X射线光谱、紫外可见吸收光谱、傅里叶变换红外光谱和光致发光光谱对合成的光致发光硅纳米晶体进行表征。所得的辛基封端提供了稳定的钝化作用，并可作为进一步对粒子进行功能化修饰的平台。电化学还原氯硅烷有可能满足各种应用中对稳定的光致发光硅纳米晶体的需求。
