A wireless and sensitive sensing detection of polycyclic aromatic hydrocarbons using humic acid-coated magnetic Fe3O4 nanoparticles as signal-amplifying tags

被引：19

作者：

Lin, Hailan ^{[1
]}

Chen, Zhang ^{[1
]}

Lu, Qingzhu ^{[1
]}

Cai, Qingyun ^{[1
]}

Grimes, Craig A. ^{[2
,3
]}

机构：

[1] Hunan Univ, Dept Chem, State Key Lab Chemobiosensing & Chemometr, Changsha 410082, Hunan, Peoples R China

[2] Penn State Univ, Dept Elect Engn, University Pk, PA 16802 USA

[3] Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2010年 / 146卷 / 01期

基金：

美国国家科学基金会; 美国国家卫生研究院;

关键词：

Polycyclic aromatic hydrocarbons; Biosensor; Nanoparticle; Wireless; Magnetic; REMOTE-QUERY; BIOSENSOR; SENSOR; ADSORPTION; WATER;

D O I：

10.1016/j.snb.2010.02.022

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A wireless magnetoelastic-sensing device for the detection of polycyclic aromatic hydrocarbons (PAHs) with anthracene as the model target is reported using humic acid-modified magnetic Fe3O4 nanoparticles (HMNPs) as signal-amplifying tags. A sandwich-type detection strategy involves the humic acid (HA)/chitosan composite self-assembled on the polyurethane-protected sensor surface and HMNPs, both of which flank the anthracene target in sequence. As the HMNPs-combined anthracene absorbs to the sensor surface, there is an increase in the mass load on the sensor, and consequently a decrease in resonance frequency. Under optimal conditions, the sensor shows a linear response to polycyclic aromatic hydrocarbons with sensitivity depending on the benzene rings. The sensor shows the largest sensitivity to benzo[a]pyrene due to its 5 ring with a detection limit of 3 nM. Tap water, river water and spring water were analyzed with this sensor. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：154 / 159

页数：6

共 31 条

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