十八胺LB膜吸附组装金纳米颗粒研究

Study of Au Nanoparticles Absorbed and Assembled on Octadecylamine LB Films

制备了十八胺单层、多层LB膜及粒径为几个纳米的金纳米粒子。pH值小于10.3时十八胺带正电荷,将其置于金纳米溶胶(pH值<10.3)中,带负电荷的金纳米粒子与带正电荷的十八胺之间通过静电作用,金纳米颗粒被成功地吸附组装到十八胺LB膜中,形成纳米薄膜。紫外-可见光谱、红外光谱及扫描电镜显示:金纳米颗粒通过这种方法能够很好的组装在十八胺LB膜上,且其组装层整齐有序,同时也受十八胺LB膜层数及组装时间的影响。

The one-monolayer and multilayer LB films of octadecylamine and the several-nanometer-diameter Au nanoparticles were prepared.When the octadecylamine LB films were placed in the Au colloid solution with pH value smaller than 10.3,by static electronic interaction between the octadecylamine molecules with positive electricity and the negative electric Au nanoparticles,the latter were assembled onto the octadecylamine LB films and ordered nano-films were obtained.Results of FTIR,UV-vis and SEM demonstrated that the Au nanoparticles can be assembled to the octadecylamine LB films effectively.The assembly of Au nanoparticles was highly odered,simultaneously,it was also influenced by the number of monolayer of octadecylamine LB films and time of assembly.