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Creation of Novel Quantum Dot embedded in Glasses by Ion Implantation and Their Optical Properties

通过离子注入制造嵌入玻璃的新型量子点及其光学特性

基本信息

批准号：
06453120
负责人：
HOSONO Hideo
金额：
$ 4.22万
依托单位：
Institute for Molecular Science Okazaki National Cooperation Research Organization (1995)Tokyo Institute of Technology (1994)
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1994
资助国家：
日本
起止时间：
1994 至 1995
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06453120/
关键词：
qunatum dot nanocluster glass Ion implantation Optical properties ナノコンポジィット

项目摘要

The purposes of this research project are to create novel quantum dot embedded in oxide glasses by ion implantation and to examine the optical properties of the resulting materials. The results obtained are summarized as follows :(1) Dual structure nano sized colloid particles (Cu core and a Cu_2O shell) embedded in glasses have been created by sequential implantation of Cu ions followed by F ions in amorphous silica. Although the presence of nanosized clusters and electron diffraction patterns indexed as Cu were observed by TEM observation, no Cu plasmon band which should appear at-2eV was perceived.(2) A striking difference in results from different implantation sequences, the optical absorption spectra and structure of nanosized colloid particles formed by changing the implantation sequence of Cu and F ions. The difference is explained in terms of a model combining energy depositions with chemical interactions of implanted F ions with ions an amorphous SiO_2.(3) Nanometer-sized crystalline Ge colloid particles have been formed by implantation of protons into substrate glasses having a composition of 1GeO_2-9SiO_2 to a fluence of 1x10^<18> cm^<-2> at an energy of 1.5 MeV at toom temperature without post-thermal annealing. Intensities of the absorption band due to Ge particles reach a maximum at-30mum from the surface and their depth profile is close to that of the electronic energy loss.(4) The primary facor controlling Cu-colloid formation in the mplanted glasses is not the change in the continuity of silica network structure but change in the strength of solvation of charged states of implanted ions.

该研究项目的目的是通过离子注入创建嵌入氧化物玻璃中的新型量子点，并检查所得材料的光学特性。所得结果概括如下：(1)通过在无定形二氧化硅中依次注入Cu离子和F离子，制备了嵌入玻璃中的双结构纳米胶体粒子(Cu核和Cu_2O壳)。虽然通过TEM观察观察到存在纳米簇和以Cu为索引的电子衍射图案，但没有观察到应在-2eV处出现的Cu等离子体带。(2)不同注入顺序的结果、改变Cu和F离子注入顺序形成的纳米胶体颗粒的光学吸收光谱和结构存在显着差异。这种差异可以用能量沉积与注入的F离子与非晶SiO_2离子的化学相互作用相结合的模型来解释。(3)通过将质子注入到成分为1GeO_2-9SiO_2的基底玻璃中，在1.5 MeV的能量下，注量为1x10^<18>cm^-2>，形成了纳米尺寸的晶态Ge胶体颗粒。室温，无需后热退火。 Ge粒子的吸收带强度在距表面30μm处达到最大值，其深度分布与电子能量损失的分布接近。(4)控制注入玻璃中Cu胶体形成的主要因素不是二氧化硅网络结构连续性的变化，而是注入离子带电态溶剂化强度的变化。