摘要
采用烷基双硫醇修饰和配体交换的方法,将弱保护剂四辛基溴化铵(TOAB)保护的金纳米粒子(Au NPs)组装到电极表面,详细研究了合成条件和组装时间对纳米粒子的尺寸、形状和表面覆盖度的影响,并运用透射电镜(TEM)和扫描隧道显微镜(STM)进行了表征.采用此纳米粒子修饰的电极获得了良好的细胞色素c(Cyt.c)分子的电化学响应,研究了电极表面纳米粒子的覆盖度对Cyt.c电化学活性的影响,并讨论了Au NPs增强电子长程转移的影响因素.
Thiol-modified surfaces are employed as the template for anchoring Au nanoparticles （AuNPs） which are protected by tetraethyl ammonium bromide （TOAB）. The synthesis and assembly of AuNPs are studied systematically with characterization by transmission electron microscopy and scanning tunneling microscopy. Such nanoparticle-modified electrodes are used to study the electrochemical reactivity of Cyt. c and show enhancement of long-range charge transfer of the Cyt. c. The influence of nanoparticle coverage on electrode for the electrochemical reactivity of Cyt. c is studied, and factors influencing long-range charge transfer are also discussed.
出处
《中国科学：化学》
CAS
CSCD
北大核心
2015年第4期405-411,共7页
SCIENTIA SINICA Chimica
基金
国家自然科学基金项目(21021002和21033007)
欧盟人员交换项目(PIRSES-GA-2012-318990-ELECTRONANO MAT)的资助
关键词
硫醇表面修饰
配体交换
纳米粒子组装
Cyt.c
长程电荷转移
thiol surface modification, ligand exchange, nanoparticles assembly, Cyt. c, long-range charge transfer
