title: Catalase-like and peroxidase-like catalytic activities of silicon nanowire arrays.
abstract: Silicon nanowire arrays (SiNWAs) were found to have catalytic activities similar to those of biological enzymes catalase and peroxidase. Thus not only can these materials catalyze the decomposition reaction of H(2)O(2) into water and oxygen, but they can also catalyze the oxidation of o-phenylenediamine (OPD), a common substrate for peroxidases, by H(2)O(2). The presence of Si-H bonds and the morphology of the SiNWAs are found to be crucial to the occurrence of such catalytic activity. When the SiNWAs are reacted with H(2)O(2), the data from Raman spectroscopy suggests the formation of (Si-H)(2)···(O species) ((Si-H)(2)···Os), which is presumably responsible for the catalytic activity. These findings suggest the potential use of SiNWAs as enzyme mimics in medicine, biotechnology, and environmental chemistry.
authors.affiliation: Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, Department of Polymer Science and Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Ren'ai Road, Suzhou 215123, PR China. wanghw@suda.edu.cn
authors.forename: Hongwei
authors.initials: H
authors.lastname: Wang
authors.forename: Wenwen
authors.initials: W
authors.lastname: Jiang
authors.forename: Yanwei
authors.initials: Y
authors.lastname: Wang
authors.forename: Xiaoli
authors.initials: X
authors.lastname: Liu
authors.forename: Jianlin
authors.initials: J
authors.lastname: Yao
authors.forename: Lin
authors.initials: L
authors.lastname: Yuan
authors.forename: Zhaoqiang
authors.initials: Z
authors.lastname: Wu
authors.forename: Dan
authors.initials: D
authors.lastname: Li
authors.forename: Bo
authors.initials: B
authors.lastname: Song
authors.forename: Hong
authors.initials: H
authors.lastname: Chen
mesh_terms: D002374:Catalase / Q000737:chemistry*; D002384:Catalysis; D006861:Hydrogen Peroxide / Q000737:chemistry; D046228:Microarray Analysis; D015394:Molecular Structure; D053770:Nanowires / Q000737:chemistry*; D010084:Oxidation-Reduction; D010100:Oxygen / Q000737:chemistry; D009195:Peroxidase / Q000737:chemistry*; D012825:Silicon / Q000737:chemistry*
chemical_list: D006861:Hydrogen Peroxide; D002374:Catalase; D009195:Peroxidase; D010100:Oxygen; D012825:Silicon