【摘要】 通过湿化学方法,利用硅氢化反应,通过对刻蚀体系、脱氧方式、刻蚀后硅粒子的分离方法等工艺的优化,成功地实现了微米硅、纳米硅及硅量子点的表面烃基改性。傅里叶变换红外光谱及扫描电子显微镜测试结果表明,硅粒子的表面是通过Si—C键的连接方式实现了烃基改性。与改性前相比,改性后的硅粒子具有显著提升的抗氧化性和抗团簇能力,能够在有机溶剂中形成稳定的分散体系。值得一提的是,与未经改性的硅量子点相比,经烃基改性后的硅量子点的荧光发射性能有了大幅提高,有望应用于光电领域。更多还原

【Abstract】 Utilizing"wet chemistry"approaches,hydrosilylation was optimized by the etching system,the way of degassing dissolved oxygen,separation method. Silicon microparticles,silicon nanoparticles,silicon quantum dots were successfully grafted with 1-alkenes. FT-IR and SEM were shown that the functionalization of silicon particles with 1-alkenes yielded alkyl-terminated particles via Si—C bond,compared with unfunctionalized silicon particles,they were hydrophobic and had higher kinetic stability,oxidation resistance,which could form a stable dispersion in organic solvents. It was worth mentioning that,the fluorescence properties of functionalized silicon quantum dots had been greatly improved,which could be used in the field of optoelectronics.更多还原