摘要
通过制备甲基和羧基混合自组装单层膜,然后在羧基基团上选择性地生长银制备二维模板银纳米阵列.利用微接触印刷在金膜上制备模板自组装单层膜,也就是利用具有二维微米图案的弹力印模把有机巯基化合物转移到金膜上.改善的银镜反应被用来制备银纳米结构,银纳米粒子选择性地生长在二维模板有机单分子层的羧基位置.甲醇作为还原剂具有高的选择性和原子经济性,一分子甲醇可以还原六个银离子.利用原子力显微镜和扫描电子显微镜确定了银纳米结构的形貌,用拉曼光谱研究银纳米结构的光学性质.
It has been demonstrated that patterned two-dimensional silver nano-arrays can be readily prepared by forming initially mixed self-assembled monolayers （SAMs） comprised of methyl and carboxylic groups and then allowing the selective growth of silver at the carboxylic acid groups. Microcontact printing was done to prepare patterned SAMs on a gold film, which is a method that uses an elastomeric stamp with micrometer-dimensional features to transfer organic thiols onto the metal surfaces. A modified mirror reaction was employed to prepare a silver nanostructure. The silver nanoparticles were selectively grown mainly on the regions exposed to the carboxylic groups of the patterned SAM gold substrates. Methanol was used as a reductant with high selectivity and atomic economy, and six silver ions can be reduced by only one methanol molecule. The morphologies of the silver nanostructures were confirmed with atomic force microscopy and scanning electron microscopy. The optical properties of the silver nanostructures were studied with Raman spectroscopy.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
2007年第21期2489-2493,共5页
Acta Chimica Sinica
基金
辽宁省教育厅重大基础研究计划(No.2004C067)资助项目.
关键词
自组装单分子层
二维模板银纳米阵列
选择性还原
微接触印刷
甲醇
self-assembled monolayer
patterned 2-dimensional silver nano-array
selective reduction
microcontact printing
methanol
