Single crystal silicon substrate was modified with self-assembled monolayer of 3-aminopropyl-trimethylsilane by aqueous phase silanization. Colloidal gold nanoparticles(12.0±1.0 nm) were adsorbed on such an amino...Single crystal silicon substrate was modified with self-assembled monolayer of 3-aminopropyl-trimethylsilane by aqueous phase silanization. Colloidal gold nanoparticles(12.0±1.0 nm) were adsorbed on such an amino-terminated surface with a submonolayer coverage. Randomly distributed gold nanoparticles were reorganized into two-dimensional close-packed aggregates when treated with alkanthiol molecules.Large size two dimensional domains or ring like structures of gold nanoparticles can be induced by solvent flow and evaporation.展开更多
Patterned nanoparticle arrays on solid surface have drawn much attention because of their potential for fabricating nanoelectronic devices. Here, we report a novel method to realize the site selective assembly of gold...Patterned nanoparticle arrays on solid surface have drawn much attention because of their potential for fabricating nanoelectronic devices. Here, we report a novel method to realize the site selective assembly of gold nanoparticles on silicon, which combines the AFM nano oxidation technique and wet chemical assembly technique. Nanosized oxide dots were generated by AFM nano oxidation on OTS covered silicon, followed by modification of APTMS monolayer on the oxide dots. Because of the specific electrostatic attraction between gold nanoparticles and the amino terminated APTMS monolayers, gold nanoparticles were only deposited on the oxidized regions. With this approach, we have successfully fabricated site selective gold nanoparticle assemblies.展开更多
文摘Single crystal silicon substrate was modified with self-assembled monolayer of 3-aminopropyl-trimethylsilane by aqueous phase silanization. Colloidal gold nanoparticles(12.0±1.0 nm) were adsorbed on such an amino-terminated surface with a submonolayer coverage. Randomly distributed gold nanoparticles were reorganized into two-dimensional close-packed aggregates when treated with alkanthiol molecules.Large size two dimensional domains or ring like structures of gold nanoparticles can be induced by solvent flow and evaporation.
基金国家自然科学基金重大项目 (批准号 :6 9890 2 2 2 )针尖化学基础研究 (批准号 :2 99730 0 1) N SF C-RGC联合资助项目(批准号 :5 9910 16 1982
文摘Patterned nanoparticle arrays on solid surface have drawn much attention because of their potential for fabricating nanoelectronic devices. Here, we report a novel method to realize the site selective assembly of gold nanoparticles on silicon, which combines the AFM nano oxidation technique and wet chemical assembly technique. Nanosized oxide dots were generated by AFM nano oxidation on OTS covered silicon, followed by modification of APTMS monolayer on the oxide dots. Because of the specific electrostatic attraction between gold nanoparticles and the amino terminated APTMS monolayers, gold nanoparticles were only deposited on the oxidized regions. With this approach, we have successfully fabricated site selective gold nanoparticle assemblies.
基金supported by the National Natural Science Foundation of China(No.21021002,No.20235010,No.20475003,No.20420130137 and No.20173058)the special 985 project of the Peking University
