Plasmon enhanced photoelectrochemical sensing of mercury (II) ions in human serum based on Au@Ag nanorods modified TiO2 nanosheets film

Yong Zhang; Anwer Shoaib; Jiaojiao Li; Muwei Ji; Jiajia Liu; Meng Xu; Bin Tong; Jiatao Zhang; Qin Wei

doi:10.1016/j.bios.2016.01.027

Plasmon enhanced photoelectrochemical sensing of mercury (II) ions in human serum based on Au@Ag nanorods modified TiO₂ nanosheets film

Yong Zhang, Anwer Shoaib, Jiaojiao Li, Muwei Ji, Jiajia Liu, Meng Xu, Bin Tong, Jiatao Zhang^*, Qin Wei

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

60 Citations (Scopus)

Abstract

Taking advantages of the monodisperse TiO₂ nanosheets (NSs) with high active crystal face exposure and the tunable localized surface plasmon resonance (LSPR) properties of Au@Ag nanorods (NRs), this study demonstrated that TiO₂ NSs film with trace amount of Au@Ag NRs modification possess a strong enhancement of photocurrent response, which was remarkably inhibited with the addition of mercury (II) ions (Hg²⁺). Based on the selective decrease of photocurrent with the addition of Hg²⁺, a simple photoelectrochemical (PEC) sensor has been assembled. The PEC sensor exhibits wide linear range (0.01-10nM), low detection limit (2.5pM), satisfying selectivity, reproducibility and acceptable stability for Hg²⁺ detection. The feasibility of this method for practical application in human serum has been evaluated and the result was satisfactory. This PEC sensing method would provide a potential application for Hg²⁺ detection in clinical diagnosis.

Original language	English
Pages (from-to)	866-873
Number of pages	8
Journal	Biosensors and Bioelectronics
Volume	79
DOIs	https://doi.org/10.1016/j.bios.2016.01.027
Publication status	Published - 15 May 2016

Keywords

Au@Ag Nanorods
Hg detection
Photoelectrochemical Sensor
TiO nanosheets film

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10.1016/j.bios.2016.01.027

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title = "Plasmon enhanced photoelectrochemical sensing of mercury (II) ions in human serum based on Au@Ag nanorods modified TiO2 nanosheets film",

abstract = "Taking advantages of the monodisperse TiO2 nanosheets (NSs) with high active crystal face exposure and the tunable localized surface plasmon resonance (LSPR) properties of Au@Ag nanorods (NRs), this study demonstrated that TiO2 NSs film with trace amount of Au@Ag NRs modification possess a strong enhancement of photocurrent response, which was remarkably inhibited with the addition of mercury (II) ions (Hg2+). Based on the selective decrease of photocurrent with the addition of Hg2+, a simple photoelectrochemical (PEC) sensor has been assembled. The PEC sensor exhibits wide linear range (0.01-10nM), low detection limit (2.5pM), satisfying selectivity, reproducibility and acceptable stability for Hg2+ detection. The feasibility of this method for practical application in human serum has been evaluated and the result was satisfactory. This PEC sensing method would provide a potential application for Hg2+ detection in clinical diagnosis.",

keywords = "Au@Ag Nanorods, Hg detection, Photoelectrochemical Sensor, TiO nanosheets film",

author = "Yong Zhang and Anwer Shoaib and Jiaojiao Li and Muwei Ji and Jiajia Liu and Meng Xu and Bin Tong and Jiatao Zhang and Qin Wei",

note = "Publisher Copyright: {\textcopyright} 2016 Elsevier B.V.",

year = "2016",

month = may,

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doi = "10.1016/j.bios.2016.01.027",

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T1 - Plasmon enhanced photoelectrochemical sensing of mercury (II) ions in human serum based on Au@Ag nanorods modified TiO2 nanosheets film

AU - Zhang, Yong

AU - Shoaib, Anwer

AU - Li, Jiaojiao

AU - Ji, Muwei

AU - Liu, Jiajia

AU - Xu, Meng

AU - Tong, Bin

AU - Zhang, Jiatao

AU - Wei, Qin

PY - 2016/5/15

Y1 - 2016/5/15

N2 - Taking advantages of the monodisperse TiO2 nanosheets (NSs) with high active crystal face exposure and the tunable localized surface plasmon resonance (LSPR) properties of Au@Ag nanorods (NRs), this study demonstrated that TiO2 NSs film with trace amount of Au@Ag NRs modification possess a strong enhancement of photocurrent response, which was remarkably inhibited with the addition of mercury (II) ions (Hg2+). Based on the selective decrease of photocurrent with the addition of Hg2+, a simple photoelectrochemical (PEC) sensor has been assembled. The PEC sensor exhibits wide linear range (0.01-10nM), low detection limit (2.5pM), satisfying selectivity, reproducibility and acceptable stability for Hg2+ detection. The feasibility of this method for practical application in human serum has been evaluated and the result was satisfactory. This PEC sensing method would provide a potential application for Hg2+ detection in clinical diagnosis.

AB - Taking advantages of the monodisperse TiO2 nanosheets (NSs) with high active crystal face exposure and the tunable localized surface plasmon resonance (LSPR) properties of Au@Ag nanorods (NRs), this study demonstrated that TiO2 NSs film with trace amount of Au@Ag NRs modification possess a strong enhancement of photocurrent response, which was remarkably inhibited with the addition of mercury (II) ions (Hg2+). Based on the selective decrease of photocurrent with the addition of Hg2+, a simple photoelectrochemical (PEC) sensor has been assembled. The PEC sensor exhibits wide linear range (0.01-10nM), low detection limit (2.5pM), satisfying selectivity, reproducibility and acceptable stability for Hg2+ detection. The feasibility of this method for practical application in human serum has been evaluated and the result was satisfactory. This PEC sensing method would provide a potential application for Hg2+ detection in clinical diagnosis.

KW - Au@Ag Nanorods

KW - Hg detection

KW - Photoelectrochemical Sensor

KW - TiO nanosheets film

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M3 - Article

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AN - SCOPUS:84954284944

SN - 0956-5663

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JO - Biosensors and Bioelectronics

JF - Biosensors and Bioelectronics

ER -

Plasmon enhanced photoelectrochemical sensing of mercury (II) ions in human serum based on Au@Ag nanorods modified TiO₂ nanosheets film

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Keywords

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