| Autor: |
Atsuyuki Fukano, Hiroyuki Oyanagi, Zhihu Sun, Lulu Zhang, Masato Uehara, Yousong Jiang, Haruki Nakamura, Hideaki Maeda, Kenichi Yamashita, Chul-Ho Lee |
| Rok vydání: |
2011 |
| Předmět: |
|
| Zdroj: |
Journal of Synchrotron Radiation. 18:272-279 |
| ISSN: |
0909-0495 |
| DOI: |
10.1107/s0909049510050545 |
| Popis: |
The design and performance of a compact fluorescense XAFS apparatus equipped with a microfluidic cell for in situ studies of nanoparticles are described. CdSe nanoparticles were prepared by solution reaction starting from trioctylphosphine-Se. Time-resolved experiments were performed by precisely controlling the reactor coordinates (x,y), allowing the synchrotron X-ray beam to travel along a reactor channel, covering nucleation and initial growth of nanoparticles. Detailed analysis of EXAFS data combined with UV-vis spectra allow reliable estimation of particle size and density in the initial growth that cannot be accessible by conventional optical techniques based on a long-range order. The Se K-XANES spectra are interpreted by multi-scattering calculations providing bond formation kinetics consistent with the EXAFS data. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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