摘要
以 3 三氯锗丙酸和正硅酸乙酯为原料采用溶胶 凝胶法制备了GeO2 SiO2 凝胶玻璃 .室温下以 5 3 2nm激光(Nd :YAG)激发GeO2 SiO2 凝胶玻璃有一强的发光峰 ,这种发光有两个发光带 ,其峰位分别在 5 75nm和 62 4nm .该发光现象是由镶嵌在GeO2 SiO2 凝胶玻璃中GeO2 纳米颗粒产生的 .利用吸收光谱和TEM对GeO2 SiO2 凝胶玻璃进行了表征 ,结果发现随着Ge含量的增加凝胶玻璃中GeO2 纳米颗粒的尺寸越来越大 ,吸收边向低能边移动 .X射线衍射和电子衍射确定GeO2 SiO2 凝胶玻璃中GeO2
The GeO 2 SiO 2 gel glasses were prepared by the sol gel method with tetraethoxysilane (Si (OC 2H 5) 4) and 3 trichlorogermanium propanoic aci (Cl 3GeCH 2CH 2COOH) as starting materials. The gel glasses show a strong room temperature photoluminescence with peaks at 575 and 624 nm under the excitation of the 532 nm line of a Nd∶YAG laser. The photoluminescence spectra are caused by GeO 2 nanoparticles embedded in gel glasses. The GeO 2 SiO 2 gel glasses are characterized by the optical absorption, X\|ray diffraction (XRD) and transmission election mecroscopy. The size of GeO 2 nanoparticles embedded in gel glasses becomes larger as the GeO 2 content increases, and thus the optical absorption edge of the gel glass shifts to the lower\|energy side. The GeO 2 nanoparticle structures are found to be amorphous GeO 2 in the gel glasses by the XRD and the electron diffraction pattern.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2002年第1期178-182,共5页
Acta Physica Sinica
