Direct visualization of molecular scale chemical adsorptions on solids using plasmonic nanoparticle arrays
Abbreviated Journal Title
Sens. Actuator B-Chem.
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
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
Sensors and Actuators B-Chemical
"Direct visualization of molecular scale chemical adsorptions on solids using plasmonic nanoparticle arrays" (2010). Faculty Bibliography 2010s. 914.