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author:

Gao, Zhuangqiang (Gao, Zhuangqiang.) [1] | Lin, Yuping (Lin, Yuping.) [2] | He, Yu (He, Yu.) [3] (Scholars:何聿) | Tang, Dianping (Tang, Dianping.) [4] (Scholars:唐点平)

Indexed by:

Scopus SCIE

Abstract:

The authors describe an enzyme-free amperometric method for the determination of glucose at nanomolar levels at near neutral pH values. A hybrid nanostructure composed of molybdenum disulfide and copper sulfide (MoS2-CuS) was prepared using L-cysteine as both the sulfur donor and the reducing agent. The nanohybrid was then immobilized on a glassy carbon electrode (GCE) by incorporating it into a film of poly(vinyl butyral). Transmission electron microscopy and Raman spectroscopy were utilized to characterize the MoS2-CuS nanohybrids. Three modified GCEs (MoS2/GCE, CuS/GCE and MoS2-CuS/GCE) were investigated with respect to their sensitivity to glucose, and the MoS2-CuS/GCE was found to perform best in displaying a limit of detection as low as 0.3 mu M in pH 7.2 buffer at an applied potential of +0.18 V (versus Ag/AgCl). The repeatability and intermediate precision are below 7.0% at 0.05, 0.5 and 1.0 mM concentration levels. The method was applied to the determination of glucose in spiked human serum samples, and recoveries were between 92.3 and 110.7%. This detection scheme is rapid and cost-effective. Natural enzymes and additional electron mediators are not required.

Keyword:

CuS nanocrystals HRTEM MoS2 nanocrystals Poly(vinyl butyral) Raman spectroscopy Transmission electron microscopy

Community:

  • [ 1 ] [Gao, Zhuangqiang]Fuzhou Univ, Inst Nanomed & Nanobiosensing, Dept Chem, MOE Key Lab Anal & Detect Food Safety, Fuzhou 350108, Peoples R China
  • [ 2 ] [Lin, Yuping]Fuzhou Univ, Inst Nanomed & Nanobiosensing, Dept Chem, MOE Key Lab Anal & Detect Food Safety, Fuzhou 350108, Peoples R China
  • [ 3 ] [He, Yu]Fuzhou Univ, Inst Nanomed & Nanobiosensing, Dept Chem, MOE Key Lab Anal & Detect Food Safety, Fuzhou 350108, Peoples R China
  • [ 4 ] [Tang, Dianping]Fuzhou Univ, Inst Nanomed & Nanobiosensing, Dept Chem, MOE Key Lab Anal & Detect Food Safety, Fuzhou 350108, Peoples R China

Reprint 's Address:

  • 何聿

    [He, Yu]Fuzhou Univ, Inst Nanomed & Nanobiosensing, Dept Chem, MOE Key Lab Anal & Detect Food Safety, Fuzhou 350108, Peoples R China

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Source :

MICROCHIMICA ACTA

ISSN: 0026-3672

Year: 2017

Issue: 3

Volume: 184

Page: 807-814

5 . 7 0 5

JCR@2017

5 . 4 0 0

JCR@2023

ESI Discipline: CHEMISTRY;

ESI HC Threshold:226

JCR Journal Grade:1

CAS Journal Grade:2

Cited Count:

WoS CC Cited Count: 33

SCOPUS Cited Count: 34

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 0

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