Gold nanorod-based mercury sensor using functionalized glass substrates

    Authors

    W. Chemnasiri;F. E. Hernandez

    Comments

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    Abbreviated Journal Title

    Sens. Actuator B-Chem.

    Keywords

    Mercury sensor; Plasmonics; Surface Plasmon resonance; Optical sensor; INORGANIC MERCURY; FLUORESCENT-PROBE; FLOW-INJECTION; AQUEOUS-MEDIA; WATER SAMPLES; HG2+; NANOPARTICLES; VAPOR; ABSORPTION; IONS; Chemistry, Analytical; Electrochemistry; Instruments & Instrumentation

    Abstract

    We report on the development of a gold nanorod-based mercury sensor, immobilizing these anisotropic metal nanoparticles on glass substrates. This novel approach is expected to find applications in the measurement of mercury traces in stream-flow. We present first a "modified" wet chemistry procedure to functionalize glass surfaces with gold nanorods, which confer control on the density of particles on the glass substrate. Then, we demonstrate that this mercury sensor, using immobilized gold nanorods on glass substrates, retains the outstanding selectivity of our previously reported mercury sensor using suspended gold nanorods, presents an extraordinary sensitivity and, does not require any sample separation and/or sample pre-concentration. The analytical figures of merit demonstrate precise and accurate analysis at the parts-per-billion level. figures with great potential for monitoring low levels of mercury in flowing water. The entire procedure in solution takes less than 60 s. (c) 2012 Elsevier B.V. All rights reserved.

    Journal Title

    Sensors and Actuators B-Chemical

    Volume

    173

    Publication Date

    1-1-2012

    Document Type

    Article

    Language

    English

    First Page

    322

    Last Page

    328

    WOS Identifier

    WOS:000311248100046

    ISSN

    0925-4005

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