Portable mercury sensor for tap water using surface plasmon resonance of immobilized gold nanorods

The surface plasmon resonance of surface immobilized gold nanorods (Au NRs) was used to quantify mercury in tap water. Glass substrates were chemically functionalized with (3-mercaptopropyl)trimethoxysilane, which chemically bound the nanorods to produce a portable and sensitive mercury sensor. The...

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Bibliographic Details
Published in:Talanta (Oxford) 2012-09, Vol.99, p.180-185
Main Authors: Heider, Emily C., Trieu, Khang, Moore, Anthony F.T., Campiglia, Andres D.
Format: Article
Language:English
Subjects:
Analytical chemistry
Chemistry
Exact sciences and technology
General, instrumentation
Gold nanoparticles
Localized surface plasmon resonance
Mercury detection
Sensors
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Summary:The surface plasmon resonance of surface immobilized gold nanorods (Au NRs) was used to quantify mercury in tap water. Glass substrates were chemically functionalized with (3-mercaptopropyl)trimethoxysilane, which chemically bound the nanorods to produce a portable and sensitive mercury sensor. The analytical capabilities of the sensor were measured using micromolar mercury concentrations. Since the analytical response was dependent upon number of nanorods present, the limit of detection was 2.28×10−19M mercury per nanorod. The possibility to using glass substrates with immobilized Au NRs is a significant step towards the analysis of mercury in tap water flows at this low concentration level. ► The surface plasmon resonance of immobilized gold nanorods was used to quantify mercury in tap water. ► Glass slides were functionalized with MPTMS and chemically bound to nanorods. ► The immobilization on the surface improves the sensitivity of nanorods for mercury. ► The immobilization on the surface improves the limits of mercury detection.
ISSN:0039-9140
1873-3573
DOI:10.1016/j.talanta.2012.05.037