ZnO Based, Piezotronic Optical Fiber Sensors for Tracing Volatile Organic Compounds

The detection of volatile organic compounds (VOCs) is a major market and research domain, where optical sensing technologies have shown promising advances [1]. Accordingly, ZnO has been extensively used as a transduction material in the sensing of VOCs in the vapour phase, while employing both resistive [2] and optical [3] detection methodologies. ZnO also exhibits significant piezoelectric properties, which in turn have been recently used in the development of piezotronic [4] self-powered, sensing and actuating devices.