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Title: Chemical sensing by interfacial voltage
"Developing methods for chemical sensing is of importance in broad ap­ plications, including food safety, healthcare, and ecology. The work herein describes an approach to chemical sensing by interfacial voltage. A test electrode is coated with a dielectric and a receptor. When the test electrode contacts an electrolyte, the receptor adsorbs an analyte from the electrolyte. The adsorption generates an interfacial voltage, a measurement of which reports the concentration of the an­ alyte. This design de-integrates two aspects of sensing: adsorption and detection. Consequently, the test electrode can be made of any elec­ tronic conductor. This flexibility enables sensors to be fabricated without microelectronic facilities. Several species of ions and organic molecules are detected, and a wearable chemical sensor worn on a fingertip is demonstrated. Needle-shaped electrodes are developed to test soft biological tissues. Chemical sensing by interfacial voltage holds promise for the development of ubiquitous sensing technology."  more » « less
Award ID(s):
2011754
PAR ID:
10500423
Author(s) / Creator(s):
; ; ; ;
Publisher / Repository:
Cell Reports
Date Published:
Journal Name:
Cell Reports Physical Science
Volume:
3
Issue:
11
ISSN:
2666-3864
Page Range / eLocation ID:
101119
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
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