Matsumoto Taketoshi, Maeda Masanori, Kobayashi Hikaru
The Institute of Scientific and Industrial Research, Osaka University , 8-1, Mihogaoka, Ibaraki, Osaka, 567-0047, Japan.
Nanoscale Res Lett. 2016 Dec;11(1):7. doi: 10.1186/s11671-015-1220-9. Epub 2016 Jan 7.
We have fabricated Si nanoparticles from Si swarf using the beads milling method. The mode diameter of produced Si nanoparticles was between 4.8 and 5.2 nm. Si nanoparticles in hexane show photoluminescence (PL) spectra with peaks at 2.56, 2.73, 2.91, and 3.09 eV. The peaked PL spectra are attributed to the vibronic structure of adsorbed dimethylanthracene (DMA) impurity in hexane. The PL intensity of hexane with DMA increases by ~3000 times by adsorption on Si nanoparticles. The PL enhancement results from an increase in absorption probability of incident light by DMA caused by adsorption on the surface of Si nanoparticles.
我们采用珠磨法从硅屑制备了硅纳米颗粒。所制备的硅纳米颗粒的模态直径在4.8至5.2纳米之间。己烷中的硅纳米颗粒显示出光致发光（PL）光谱，其峰值分别位于2.56、2.73、2.91和3.09电子伏特。这些峰值PL光谱归因于己烷中吸附的二甲基蒽（DMA）杂质的振动结构。含有DMA的己烷在吸附到硅纳米颗粒上后，其PL强度增加了约3000倍。PL增强是由于DMA吸附在硅纳米颗粒表面导致入射光吸收概率增加所致。
