title: Aminosilane-Assisted Electrodeposition of Gold Nanodendrites and Their Catalytic Properties.
abstract: A promising alternative route for the synthesis of three-dimensional Au dendrites was developed by direct electrodeposition from a solution of HAuCl4containing 3-aminopropyltriethoxysilane (APTS). Ultraviolet-visible spectroscopy, fourier transform infrared spectroscopy and isothermal titration calorimetry were used to study the interaction of APTS in electrolyte. The effect of APTS on the formation of the hierarchical structure of Au dendrites was investigated by cyclic voltammetry, rotating disk electrode, electrochemical impedance spectroscopy and quartz crystal microbalance. The growth directions of the trunks and branches of the Au dendrites can be controlled by sweep-potential electrodeposition to obtain more regular structures. The efficacy of as-synthesised Au dendrites was demonstrated in the enhanced electro-catalytic activity to methanol electro-oxidation and the high sensitivity of glucose detection, which have potential applications in direct-methanol fuel cells and non-enzymatic electrochemical glucose biosensors, respectively.
authors.affiliation: Department of Mechanical Engineering, The University of Hong Kong, Pokfulam, Hong Kong.
authors.forename: Nga Yu
authors.initials: NY
authors.lastname: Hau
authors.affiliation: Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong.
authors.forename: Peixian
authors.initials: P
authors.lastname: Yang
authors.affiliation: Department of Mechanical Engineering, The University of Hong Kong, Pokfulam, Hong Kong.
authors.forename: Chang
authors.initials: C
authors.lastname: Liu
authors.affiliation: Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong.
authors.forename: Jian
authors.initials: J
authors.lastname: Wang
authors.affiliation: Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong.
authors.forename: Po-Heng
authors.initials: PH
authors.lastname: Lee
authors.affiliation: Department of Mechanical Engineering, The University of Hong Kong, Pokfulam, Hong Kong.
authors.forename: Shien-Ping
authors.initials: SP
authors.lastname: Feng
mesh_terms: D002384:Catalysis; D055664:Electrochemical Techniques / Q000379:methods*; D006046:Gold / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D000432:Methanol / Q000737:chemistry; D010084:Oxidation-Reduction; D011437:Propylamines / Q000737:chemistry*; D012821:Silanes / Q000737:chemistry*
chemical_list: D011437:Propylamines; D012821:Silanes; D006046:Gold; C477625:amino-propyl-triethoxysilane; D000432:Methanol