Thermal evaporation and x-ray photostability of dodecyl-passivated silicon nanoparticles
Thermal evaporation and x-ray photostability of dodecyl-passivated silicon nanoparticles
复制标题
十二烷基钝化硅纳米颗粒的热蒸发和 X 射线光稳定性
DOI:
10.1088/0022-3727/45/35/355303
复制
发表时间:
2012
期刊:
影响因子:
--
通讯作者:
Coxon P
中科院分区:
文献类型:
--
作者:
Coxon P
X-ray photoelectron spectroscopy (XPS) and x-ray absorption spectroscopy have been used to study the makeup of thin films of 6.5 nm diameter dodecyl-capped silicon nanoparticles (SiNPs) formed in a one-pot synthesis method of micelle reduction. Thermostability measurements show the SiNPs undergo thermal desorption at∼ 240 C, a higher temperature than for SiNPs capped by shorter hydrocarbon layers owing to the greater size of the nanoparticle system in this case. Suspensions of SiNPs are found to evaporate in a UHV environment intact with the hydrocarbon passivating layer preserved and form thin films which are visualized with microimaging FTIR spectroscopy. The stability of the capping layer within thick SiNP films under extended exposure (up to 2160 s) to 140 eV photons has been examined where XPS spectra show the breakdown of the passivating layer allowing the underlying silicon core to undergo subsequent oxidation.
DOI:
10.1088/0022-3727/44/49/495301
发表时间:
2011-12
期刊:
Journal of Physics D: Applied Physics
影响因子:
--
作者:
P. Coxon;Qi Wang;Y. Chao
通讯作者:
P. Coxon;Qi Wang;Y. Chao
DOI:
--
发表时间:
2010
期刊:
2010 35th IEEE Photovoltaic Specialists Conference
影响因子:
--
作者:
K. Surana;H. Lepage;D. Bellet;G. Carval;Mathieu Baudrit;Philippe Thony;Pierre Mur
通讯作者:
Pierre Mur