Localized Collection of Airborne Analytes: A Transport Driven Approach to Improve the Response Time of Existing Gas Sensor Designs including SERS based Detection of Small Molecules. Issue 1746 (8th May 2015)

• Record Type: Journal Article
• Authors: Fang, Jun; Park, Se-Chul; Schlag, Leslie; Stauden, Thomas; Pezoldt, Joerg; Jacobs, Heiko O.
• Editors: Gao, P-X; Ohodnicki, P.; Shao, L.
• Is Part Of: MRS proceedings. Issue 1746:(2015)
• Publication Date: 2015-05-08
• Subjects: sensor, -- Raman spectroscopy, -- electrodeposition; Electrical engineering -- Congresses; Physics -- Congresses; Materials -- Research -- Congresses; Materials science -- Congresses; 620.11
• DOI: 10.1557/opl.2015.398
• Languages: English
• ISSNs: 0272-9172

Abstract

ABSTRACT: The detection of single molecular binding events has been a recent trend in sensor research introducing various sensor designs where the active sensing elements are nanoscopic in size. Currently, diffusion-only-transport is often used and it becomes increasingly unlikely for an analyte molecule to "find" and interact with sensing structures where the active area is shrunk in size, trading an increased sensitivity with a long response time. This report introduces electrodynamic nanolens based analyte concentration concepts to transport airborne analytes to nanoscopic sensing points to improve the response time of existing gas sensor designs. In all cases we find that the collection rate is several orders of magnitudes higher than in the case where the collection is driven by diffusion.