憎水性金属纳米粒子及其LB膜的制备与光谱表征

用油酸钠和十四烷基硫醇作为稳定剂，制备了高度单分散的疏水性银和金纳米溶胶。考察了单粒子层的π－Ａ曲线并建造了纳米粒子的ＬＢ膜。通过紫外可见光谱讨论了纳米粒子的分散状态，由红外光谱结果讨论了纳米粒子表面有机吸附层的状态。

Preparation and Spectroscopic Characterization of Hydrophobic Metallic Nanoparticles and Their LB Films

Hydrophilic silver and gold nano-colloids were synthesized using sodium oleate as a stabilizer, and their hydrophobic nano-colloids were further obtained using tetradecanethiol as a co-stabilizer and using concentrated hydrogen chloride acid as an initiator. UV-visible spectra of the gold and silver nanoparticles at different states were recorded and compared. The spectra show that surfactant stabilized colloids are stable and monodispersed both in aqueous solution and in organic solvents. Surface pressure (pi)-area (A) curves of the nanoparticulate monolayers were measured and their LB films were constructed. IR spectra show that polar head group of the oleate was adsorbed on the surface of the nanoparticles.