Subnanogram Mass Measurements on Plasmonic Nanoparticles for Temperature-Programmed Thermal Analysis

    Authors

    C. M. Wang; M. H. Zhang; H. N. Wang; S. L. Zou;M. Su

    Comments

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    Abbreviated Journal Title

    J. Phys. Chem. Lett.

    Keywords

    ALKANETHIOLATE MONOLAYERS; X-RAY; DESORPTION; RESONANCE; SPECTROSCOPY; GOLD; PRESSURE; BALANCE; ARRAYS; METAL; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, ; Multidisciplinary; Physics, Atomic, Molecular & Chemical

    Abstract

    Ultrasensitive thermogravimetric analysis of adsorbed organic molecules has been achieved on an ordered array of gold nanoparticles used as' a novel plasmonic nanobalance. The extinction peaks of the resonating surface plasmon of nanoparticle arrays shift upon loading molecules and return to the original position after a linear temperature rise process. A good correlation exists between the film thickness and magnitude of peak shifts. The detection range of plasmonic nanobalance derived from our results can reach a subnanogram level (1.8 pg on an active area of 100 mu m(2)), which is much lower than those of mechanical or electronic mass-measuring devices. Such high mass sensitivity, combined with the remote detection capability and high-temperature operation of plasmonic sensors, allows the in situ detections of the masses of loaded material and thermally desorbed molecules.

    Journal Title

    Journal of Physical Chemistry Letters

    Volume

    1

    Issue/Number

    1

    Publication Date

    1-1-2010

    Document Type

    Article

    Language

    English

    First Page

    79

    Last Page

    84

    WOS Identifier

    WOS:000276905600018

    ISSN

    1948-7185

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