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Ethanol Vapor Sensing Properties of Triangular Silver Nanostructures Based on Localized Surface Plasmon Resonance
Department of Communication Engineering, Chengdu University of Information Technology, Chengdu 610225, China
State Key Lab of Optical Technologies for Microfabrication, Institute of Optics and Electronics, Chinese Academy of Science, Chengdu 610209, China
* Author to whom correspondence should be addressed.
Received: 25 July 2011; in revised form: 28 August 2011 / Accepted: 31 August 2011 / Published: 5 September 2011
Abstract: A sensitive volatile organic vapor sensor based on the LSPR properties of silver triangular nanoprisms is proposed in this paper. The triangular nanoprisms were fabricated by a nanosphere lithography (NSL) method. They have sharp vertices and edges, and are arranged in an ideal hexangular array. These characteristics ensure that they exhibit an excellent LSPR spectrum and a high sensitivity to the exterior environment changes. The LSPR spectra responding to ethanol vapor and four other volatile organic vapors—acetone, benzene, hexane and propanol—were measured with a UV-vis spectrometer in real time. Compared with the other four vapors, ethanol exhibits the highest sensitivity (~0.1 nm/mg L−1) and the lowest detection limit (~10 mg/L) in the spectral tests. The ethanol vapor test process is also fast (~4 s) and reversible. These insights demonstrate that the triangular nanoprism based nano-sensor can be used in ethanol vapor detection applications.
Keywords: localized surface plasmon resonance; volatile organic vapor; triangular nanoprism; sensitivity
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MDPI and ACS Style
Ma, W.; Yang, H.; Wang, W.; Gao, P.; Yao, J. Ethanol Vapor Sensing Properties of Triangular Silver Nanostructures Based on Localized Surface Plasmon Resonance. Sensors 2011, 11, 8643-8653.
Ma W, Yang H, Wang W, Gao P, Yao J. Ethanol Vapor Sensing Properties of Triangular Silver Nanostructures Based on Localized Surface Plasmon Resonance. Sensors. 2011; 11(9):8643-8653.
Ma, Wenying; Yang, Huan; Wang, Weimin; Gao, Ping; Yao, Jun. 2011. "Ethanol Vapor Sensing Properties of Triangular Silver Nanostructures Based on Localized Surface Plasmon Resonance." Sensors 11, no. 9: 8643-8653.