Electrically induced deflective amplification for adaptive sensing of chemicals | Zendy

Ruhai Tian | Zendy; Liyuan Ma | Zendy; Ming Su | Zendy

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Electrically induced deflective amplification for adaptive sensing of chemicals

Author(s) -

Ruhai Tian,

Liyuan Ma,

Ming Su

Publication year - 2009

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.2999582

Subject(s) - electric field , materials science , polymer , adsorption , monolayer , ion , fiber , nanotechnology , nanoparticle , optoelectronics , sensitivity (control systems) , chemical engineering , composite material , chemistry , electronic engineering , organic chemistry , physics , quantum mechanics , engineering

An adaptive strategy for sensitive detection of chemicals is proved in electrically induced deflections of an optical fiber. The surface of the fiber, close to one end, is modified by a sensing polymer film. Upon contact with solutions, the adsorption of ions onto the polymer changes the surface charge and bends the fiber in an electric field. The concept has been confirmed in several systems including detections of pH and metal ion, nanoparticles, and self-assembled monolayers. The dependence of the sensitivity on the strength of electric field provides an adaptive approach with adjustable sensitivity for chemical sensing.

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