Abstract
A high-precision ultraviolet (UV) detector combining ZnO nanostructure and a dual delay line surfaceacoustic wave (SAW) oscillator system is presented. The UV detector is made of ZnO nanorods ona 128°YX-LiNbO3-based two-port SAW oscillator. The ZnO nanorod synthesized by chemical solutionmethod is used as a UV sensing material. The center frequency of the SAW device is at145 MHz. A dual delay line SAW oscillator system was constructed to eliminate externalenvironmental fluctuations. Under illumination of a UV source consisting of an Xe lampand a monochromator, frequency shifts of the UV detector were measured. A maximumfrequency shift of over 40 kHz was observed under 365 nm illumination for several on–offcycles, indicating the ZnO nanorod-based detector was sensitive to UV light and with goodrepeatability. Moreover, frequency shifts reached a value of 19 kHz after 365 nm was turnedon for 10 s, which implies a real-time high-sensitivity UV sensor was successfullyfabricated. Results show a ZnO nanostructure-based SAW oscillator system is apromising candidate for a real-time, fast-response, high-precision UV detector.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
