Nanopatterned assembling of colloidal gold nanoparticles on silicon

2019-11-09 03:51:59

Gold silicon chemical nanoparticles colloidal

责任者: Jiwen Zheng;Zihua Zhu;Haifeng Cheng;Zhongfan Liu 单位: Center for Nanoscale Sci. & Technol., Beijing Univ., China 来源出处: Langmuir(Langmuir (USA)),2000/05/16,16(10):4409-12 摘要: A quasi-one-dimensional (quasi-1D) Au nanocolloids array has been fabricated on silicon by combining the techniques of atomic force microscopy (AFM)-based nanooxidation and chemical assembling of colloidal nanoparticles. The silicon substrate, modified with an octadecyltrichlorosilane (OTS) monolayer, was first subjected to a localized chemical oxidation by using conductive AFM to form silicon oxide lines. After further modification of the oxidized region with an aminopropyltriethoxylsilane (APTES) monolayer via selective chemical adsorption, the substrate was exposed to a colloidal suspension of gold for deposition of gold nanoparticles. It is found that the Au nanoparticles can be selectively immobilized onto the AFM tip-defined amino-terminating regions of the silicon surface, forming quasi-1D gold nanoparticle arrays. The patterned structure is highly controllable and reproducible, which, we believe, will contribute to studies of nanodevices and mesoscopic phenomena 关键词: atomic force microscopy;colloids;gold;nanostructured materials;nanotechnology;oxidation;self-assembly;semiconductor-metal boundaries;nanopatterned assembling;colloidal gold nanoparticles;quasi-one-dimensional Au nanocolloids array;atomic force microscopy;AFM;nanooxidation;chemical assembling;colloidal nanoparticles;Si substrate;octadecyltrichlorosilane monolayer;localized chemical oxidation;oxidized region;aminopropyltriethoxylsilane monolayer;selective chemical adsorption;colloidal suspension;amino-terminating regions;patterned structure;Si;Au