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Gold nanoparticle-based miniaturized nanomaterial surface energy transfer probe for rapid and ultrasensitive detection of mercury in soil, water, and fish

Darbha, Gopala Krishna and Ray, Anandhi and Ray, Paresh Chandra (2007) Gold nanoparticle-based miniaturized nanomaterial surface energy transfer probe for rapid and ultrasensitive detection of mercury in soil, water, and fish. ACS NANO, 1 (3). pp. 208-214.

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Official URL: http://dx.doi.org/10.1021/nn7001954

Abstract

Contamination of the environment with mercury has been an important concern throughout the world for decades. Exposure to high Hg levels can be harmful to the brain, heart, kidneys, lungs, and immune system of humans of all ages. Driven by the need to detect trace amounts of mercury in environmental samples, here we present a miniaturized, inexpensive, and battery-operated ultrasensitive gold nanoparticle-based nanomaterial surface energy transfer probe for screening mercury levels in contaminated soil, water, and fish which has excellent sensitivity (2 ppt) and selectivity for Hg(II) over competing analytes, with the largest fluorescence enhancement to date for sensing Hg(II) in environmental samples (1100-fold). The sensitivity of our probe to detect mercury level in soil, water, and fish is about 2-3 orders of magnitude higher than the EPA standard limit. We demonstrate that our probe is suitable to screen the amount of mercury in different fish, shellfish, and water samples from various commercial sources.

Item Type:Article
Uncontrolled Keywords:NSET; nanoprobe; gold nanoparticle; mercury detection; environmental samples
Subjects:Physical Science > Nanophysics
Technology > Nanotechnology and environmental applications
Biomedical Science > Nanotechnology for human health
ID Code:2610
Deposited By:Anuj Seth
Deposited On:09 Jan 2009 16:05
Last Modified:09 Jan 2009 16:05

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