SiO_2纳米线簇、C-Si-O纳米球的制备及形貌、红外光谱和光致发光光谱研究

Synthesis of silicon oxide nanocluster and C-Si-O nanospheres morphology and photoluminscence Fourier transform infrared spectroscopy study

以二茂铁和硅油作为催化剂和原料,利用高温裂解硅油为C,Si,O源,在常压N2和H2混合气氛的化学气相沉积管式炉中制备了大量直径为5—40nm、长数百纳米的非晶SiO2纳米线簇及粒径为100—300nm的C-Si-O实心纳米球.利用透射电子显微镜、扫描电子显微镜对产物形貌进行表征.Fourier红外吸收谱显示出非晶SiO2所具有的474,802和1100cm-1三个特征峰;SiO2纳米线簇的光致发光光谱具有较强440nm蓝光发光峰;而C-Si-O(原子数之比为1.13∶1∶2.35)纳米球具有奇特的红绿蓝(625,540,466nm)三色光致发光谱.

Silicon oxide nanocluster and C-Si-O nanospheres are fabricated by the chemical vapor deposition method at 1100℃,in flowing N2/H2 atmosphere using the ferrcene and the silicon oil（20, as the raw material and the catalyzer,respcetively. The silicon oxide nanowires are uniform with diameter of 5-40 nm and length up to hundreds of nanometer. The diameter of the C-Si-O solid-nanospheres is 100-300 nm. Scanning electron microscopy,transmission electron microscopy,electronic data system,Fourier transform infrared spectroscopy（FTIR） and photoluminscence（PL） were used to characterize the microstructure,composition and optical propertics of the nanocluster and the C-Si-O nanospheres. Energy dispersive x-ray spectrum analysis reveals that the C-Si-O nanospheres consist of C,Si and O elements in an atomic ratio of approximately 1.13∶1∶2.35. The nanoclusters show infrared spectroscopy absorption peaks at 474,802 and 1100 cm-1. The PL peak of the nanoclusters is at 440 nm. It is very curious that the PL of the C-Si-O solid-nanospheres possesses the red,green and blue--trichromic luminescent peeks.