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Evaluation of Zinc Oxide Nano-Microtetrapods for Biomolecule Sensing Applications
KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics. Acreo Swedish ICT AB, Sweden.
KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics.
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2015 (English)In: MICRO+NANO MATERIALS, DEVICES, AND SYSTEMS, SPIE - International Society for Optical Engineering, 2015, UNSP 966833Conference paper (Refereed)Text
Abstract [en]

Zinc oxide tetrapods (ZnO-Ts) were synthesized by flame transport synthesis using Zn microparticles. This work herein reports a systematical study on the structural, optical and electrochemical properties of the ZnO-Ts. The morphology of the ZnO-Ts was confirmed by scanning electron microscopy (SEM) as joint structures of four nano-microstructured legs, of which the diameter of each leg is 0.7-2.2 mu m in average from the tip to the stem. The ZnO-Ts were dispersed in glucose solution to study the luminescence as well as photocatalytic activity in a mimicked biological environment. The photoluminescence (PL) intensity in the ultraviolet (UV) region decreased with linear dependence on the glucose concentration up to 4 mM. The ZnO-Ts were also attached with glucose oxidase (GOx) and over coated with a thin film of Nafion to form active layers on Si/SiO2/Au substrate for electrochemical glucose sensing. The attachment of GOx and the coating of Nafion onto ZnO-Ts were confirmed by Fourier transform infrared spectroscopy (FT-IR). Furthermore, the current response of the active layers based on ZnO-Ts was investigated by cyclic voltammetry (CV) in various glucose concentration conditions. Stable current response of glucose was detected with linear dependence on the glucose concentration up to 12 mM, which confirms the potential of ZnO-Ts for biomolecule sensing applications.

Place, publisher, year, edition, pages
SPIE - International Society for Optical Engineering, 2015. UNSP 966833
Series
, Proceedings of SPIE, ISSN 0277-786X ; 9668
Keyword [en]
zinc oxide tetrapods, nano-microstructure, glucose oxidase, nafion, glucose, sensor
National Category
Nano Technology
Identifiers
URN: urn:nbn:se:kth:diva-184080DOI: 10.1117/12.2202529ISI: 000370723500040ScopusID: 2-s2.0-84959906456ISBN: 978-1-62841-890-3OAI: oai:DiVA.org:kth-184080DiVA: diva2:913890
Conference
SPIE Conference on Micro+Nano Materials, Devices, and Systems, DEC 06-09, 2015, Sydney, AUSTRALIA
Note

QC 20160322

Available from: 2016-03-22 Created: 2016-03-22 Last updated: 2016-07-22Bibliographically approved

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Zhao, WeiZhao, YichenToprak, Muhammet S.
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