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Title:
Genetically Engineered Phage-Templated MnO2 Nanowires: Synthesis and Their Application in Electrochemical Glucose Biosensor Operated at Neutral pH Condition
Author: Han, Lei1,2,3; Shao, Changxu1,2,3; Liang, Bo3; Liu, Aihua1,2
Source: ACS APPLIED MATERIALS & INTERFACES
Issued Date: 2016-06-08
Volume: 8, Issue:22, Pages:13768-13776
Keyword: MnO2 nanowires ; biotemplate synthesis ; phage display ; electrochemical glucose biosensor ; neutral pH
DOI: 10.1021/acsami.6b03266
DOC Type: Article
English Abstract: To conveniently obtain one-dimensional MnO2 nanowires (NWs) with controlled structure and unique properties for electron transfer, the genetically engineered M13 phages were used as templates for precise nucleation and growth of MnO2 crystals in filamentous phage scaffolds, via the spontaneous oxidation of Mn2+ in alkaline solution. It was found that the morphology of NWs could be tailored by the surface charge of M13 mutants. MnO2 crystals were uniformly distributed on the surface of negatively charged tetraglutamate-fused phage (M13-E4), significantly different from irregular MnO2 agglomeration on the weakly negatively charged wild-type phage and positively charged tetraarginine-fused phage. The as-synthesized M13-E4@MnO2 NWs could catalyze the electro-oxidation of H2O2 at neutral pH. To demonstrate the superiority of the electrocatalytic activity in the solution containing plenty of chloride ions at neutral pH, both glucose oxidase and as-prepared MnO2 NWs were used for fabricating the glucose biosensor. The proposed biosensor showed a wide linear range (5 mu M to 2 mM glucose), a low limit of detection of 1.8 mu M glucose (S/N = 3), good interassay and intra-assay reproducibility and satisfactory storage stability. Due to the superiorities of synthesis and electrochemical performance, the as-prepared MnO2 NWs are promising for applications in electrocatalysis, electrochemical sensor, and supercapacitor.
WOS Headings: Science & Technology ; Technology
WOS Subject: Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS Subject Extended: Science & Technology - Other Topics ; Materials Science
WOS Keyword Plus: HYDROGEN-PEROXIDE ; ALPHA-MNO2 NANOTUBES ; BETA-MNO2 NANORODS ; ION BATTERIES ; VIRUS ; SENSOR ; NANOSTRUCTURES ; NANOPARTICLES ; NANOCOMPOSITE ; ELECTRODE
Indexed Type: SCI
Funder: National Natural Science Foundation of China(21275152 ; 21475144)
Language: 英语
WOS ID: WOS:000377642100013
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Content Type: 期刊论文
URI: http://ir.qibebt.ac.cn/handle/337004/8323
Appears in Collections:生物传感技术团队_期刊论文

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description.institution: 1.Qingdao Univ, Inst Biosensing, Qingdao 266071, Peoples R China
2.Qingdao Univ, Coll Chem & Chem Engn, Qingdao 266071, Peoples R China
3.Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Lab Biosensing, 189 Songling Rd, Qingdao 266101, Peoples R China
4.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China

Recommended Citation:
Han, Lei,Shao, Changxu,Liang, Bo,et al. Genetically Engineered Phage-Templated MnO2 Nanowires: Synthesis and Their Application in Electrochemical Glucose Biosensor Operated at Neutral pH Condition[J]. ACS APPLIED MATERIALS & INTERFACES,2016,8(22):13768-13776.
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