摘要
采用Stober溶胶-凝胶法制备出二氧化硅纳米颗粒,用十八烷基三氯硅烷(OTC)进行表面改性,利用SEM、FT-IR对改性纳米粒子进行表征,并对玻璃表面新鲜汗垢手印进行显现。结果表明,合成的双亲性二氧化硅纳米粒子双亲性能良好、形态均一、稳定性较好。此纳米材料显现手印效果显著,具有选择性强、背景干扰小等特点。
Silica nanoparticles were prepared by sol-gel method. Octadecyl trichlorosilane（OTC） was used in the hydrophobic surface-modification of silica nanoparticles. The modified nanoparticles were characterized by SEM and FT-IR. By changing the ratio of nanoparticles and OTC, excellent monodispersed and stable silica nanoparticles were got. This kind of nanomaterial was an effective reagent for latent fingerprints development on smooth and now porous substrates with little background interference.
基金
基本科研业务费专项资金重点项目(2009JB007)
关键词
纳米二氧化硅
溶胶-凝胶法
双亲改性
手印显现
silica nanoparticles, sol-gel method, lipophilic modification, development of fingerprint
