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Anal Chem

Title:		Chemical Sensor Based Upon Stress-Induced Changes in the Permeability of a Magnetoelastic Wire
Author(s):		Hatab NA; Crane NA; Mee DK; Howell LN; Mooney LR; Hallman RL; Sepaniak MJ; Lamberti VE;
Address:		"Department of Chemistry, University of Tennessee , Knoxville, Tennessee 37996-1600, United States. Consolidated Nuclear Security, LLC , Y-12 National Security Complex, P.O Box 2009, Oak Ridge, Tennessee 37831, United States"
Journal Title:		Anal Chem
Year:		2017
Volume:		20170623
Issue:		13
Page Number:		6976 - 6983
DOI:		10.1021/acs.analchem.7b00120
ISSN/ISBN:		1520-6882 (Electronic) 0003-2700 (Linking)
Abstract:		"We introduce a chemical sensing technology, named ChIMES (Chemical Identification through Magneto-Elastic Sensing), that can detect a broad range of targets and that has the capability of untethered communication through a metallic or nonmetallic barrier. These features enable many applications in which penetrations into the sampled environment are unwanted or infeasible because of health, safety, or environmental concerns, such as following the decomposition of a dangerous material in a sealed container. The sensing element is passive and consists of a target response material hard-coupled to a magnetoelastic wire. When the response material encounters a target, it expands, imposing mechanical stress on the wire and altering its magnetic permeability. Using a remote excitation-detection coil set, the changes in permeability are observed by switching the magnetic domains in the wire and measuring the modifications in the Faraday voltage as the stress is varied. Sensors with different response materials can be arrayed and interrogated individually. We describe the sensor and its associated instrumentation, compare the performance of several types of wire, and evaluate analytical metrics of single and arrayed ChIMES sensors against a suite of volatile organic compounds"
Keywords:
Notes:		"PubMed-not-MEDLINEHatab, Nahla A Crane, Nichole A Mee, David K Howell, L Neville Jr Mooney, Larry R Hallman, Russell L Jr Sepaniak, Michael J Lamberti, Vincent E eng Research Support, U.S. Gov't, Non-P.H.S. 2017/06/24 Anal Chem. 2017 Jul 5; 89(13):6976-6983. doi: 10.1021/acs.analchem.7b00120. Epub 2017 Jun 23"