Title

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

Authors

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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