Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, USA.
J Am Chem Soc. 2010 Dec 15;132(49):17358-9. doi: 10.1021/ja1074272. Epub 2010 Nov 22.
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 × 10(-4)) in bulk refractive index when the gas was switched between He(g) and Ar(g) or He(g) and N2(g). We also demonstrate submonolayer sensitivity to adsorbed water from exposure of the sensor to air (40% humidity) versus dry N2(g). These measurements significantly expand the applications space and characterization tools for plasmonic nanosensors.
我们报告了基于高分辨率局域表面等离子体共振（HR-LSPR）光谱的第一种惰性气体传感和特性研究。当气体在 He(g)和 Ar(g)或 He(g)和 N2(g)之间切换时，HR-LSPR 用于检测体折射率的极小变化（<3×10(-4))。我们还展示了对暴露于空气（40%湿度）与干燥 N2(g)的传感器吸附水的亚单层灵敏度。这些测量显著扩展了等离子体纳米传感器的应用空间和特性化工具。
