Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 132, Issue 49, Pages 17358-17359Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja1074272
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Funding
- Defense Threat Reduction Agency [HDTRA 1-09-1-0007]
- National Science Foundation [EEC-0647560, DMR-0520513, CHE-0911145]
- National Cancer Institute [1 U54 CA119341-01]
- Ruth L. Kirschstein National Research Service Award [5 F32 GM077020]
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [0911145] Funding Source: National Science Foundation
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We report the first inert gas sensing and characterization studies based on high-resolution localized surface plasmon resonance (HR-LSPR) spectroscopy. HR-LSPR was used to detect the extremely small changes (<3 x 10(-4)) in bulk refractive index when the gas was switched between He(g) and Ar(g) or He(g) and N-2(g). We also demonstrate submonolayer sensitivity to adsorbed water from exposure of the sensor to air (40% humidity) versus dry N-2(g). These measurements significantly expand the applications space and characterization tools for plasmonic nanosensors.
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