Title

Direct visualization of molecular scale chemical adsorptions on solids using plasmonic nanoparticle arrays

Authors

Authors

C. M. Wang; L. Y. Ma; M. Hossain; H. N. Wang; S. L. Zou; J. J. Hickman;M. Su

Comments

Authors: contact us about adding a copy of your work at STARS@ucf.edu

Abbreviated Journal Title

Sens. Actuator B-Chem.

Keywords

Plasmonic nanoparticles; Visual detection; Adsorption; Molecular thin; film; Mercury; SILVER NANOPARTICLES; ULTRASENSITIVE DETECTION; NANOSPHERE LITHOGRAPHY; HG ADSORPTION; GOLD-FILMS; REAL-TIME; MERCURY; SURFACE; RESONANCE; SENSOR; Chemistry, Analytical; Electrochemistry; Instruments & Instrumentation

Abstract

The fast and sensitive detections of chemicals adsorption onto solid substrates are of importance to many fields Ordered arrays of gold or silver nanoparticles with strong surface plasmon resonances allow directly visualized detections of molecular scale adsorptions of polymer multilayers an explosive derivative and mercury vapor on solid substrates The adsorbed species change local dielectric constants surrounding plasmomc nanoparticles leading to shifts of plasmon resonance peaks into either long or short wavelength direction depending on interactions of chemicals with nanoparticles The magnitude of peak shifts is proportional to the amount of adsorbed chemicals in certain range and is sufficiently large so that color changes can be seen directly by naked eyes The ordered nanoparticles can be made over a large area at high yield allowing a quantitative passive and sensitive detection of molecular species (C) 2010 Elsevier B V All rights reserved

Journal Title

Sensors and Actuators B-Chemical

Volume

150

Issue/Number

2

Publication Date

1-1-2010

Document Type

Article

Language

English

First Page

667

Last Page

672

WOS Identifier

WOS:000284339800025

ISSN

0925-4005

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