ZnO nanorods array based field-effect transistor biosensor for phosphate detection

被引：93

作者：

Ahmad, Rafiq ^{[1
]}

Ahn, Min-Sang ^{[1
]}

Hahn, Yoon-Bong ^{[1
]}

机构：

[1] Chonbuk Natl Univ, Nanomat Proc Res Ctr, Sch Semicond & Chem Engn, 567 Baekjedaero, Jeonju 54896, Jeollabuk, South Korea

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2017年 / 498卷

基金：

新加坡国家研究基金会;

关键词：

ZnO nanorods; Field-effect transistor; Phosphate biosensor; Pyruvate oxidase; High sensitivity; INORGANIC-PHOSPHATE; PYRUVATE OXIDASE; NITRATE; SENSOR; ELECTRODES; POLYMER; NITRITE; SAMPLES; WATER; IONS;

D O I：

10.1016/j.jcis.2017.03.069

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A promising field-effect transistor (FET) biosensor has been fabricated based on pyruvate oxidase (PyO) functionalized ZnO nanorods (ZnO NRs) array grown on seeded SiO2/Si substrate. The direct and vertically grown ZnO NRs on the seeded SiO2/Si substrate offers high surface area for enhanced PyO immobilization, which further helps to detect phosphate with higher specificity. Under optimum conditions, the fabricated FET biosensor provided a convenient method for phosphate detection with high sensitivity (80.57 mu A mM(-1) cm(-2)) in a wide-linear range (0.1 mu M-7.0 mM). Additionally, it also showed very low effect of electroactive species, stability and good reproducibility. Encouraging results suggest that this approach presents a promising method to be used for field measurements to detect phosphate. (C) 2017 Published by Elsevier Inc.

引用

收藏

页码：292 / 297

页数：6

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