کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7133215 | 1461822 | 2018 | 54 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Ultrasensitive zinc magnesium oxide nanorods based micro-sensor platform for UV detection and light trapping
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
A cost effective unique approach has been employed to realize high quality zinc magnesium oxide (Zn1-xMgxO) based nanostructures which can replace conventional material i.e. Zinc oxide (ZnO) in detector and sensor applications. High resolution structural studies showed the formation of vertically aligned hexagonal and truncated hexagonal nanorods on RF sputtered ZnO and Zn1-xMgxO seed layer. Single crystal Zn1-xMgxO and ZnO nanorods with dominant c-axis growth along (002) crystal axis and d-spacing of 0.262 and 0.266â¯nm, respectively were obtained from high resolution transmission electron microscopy, selective area diffraction pattern and high resolution X-ray diffraction spectra. The high external quantum efficiency of 12.054% with narrow full width half maxima of 12.63â¯nm was achieved from photoluminescence spectroscopy (Zn1-xMgxO nanorods) performed at room temperature. Approximately two order of enhancement in current density was observed from photodetector fabricated using Zn1-xMgxO nanorods. A state of art peak responsivity of 62.19â¯A/W at 350â¯nm attributed to near band edge emission peak and high current rectification capability with a maximum internal gain of 185 was measured from Zn1-xMgxO detector. Zn1-xMgxO detector exhibited temporal response with reasonable rise and fall time constants along with three order higher detectivity values in comparison to ZnO detector. A DC current based humidity sensor was fabricated and characterized using sample synthesized for longer growth duration. High sensitivity of 1.612 /% RH was achieved and low recovery time was observed as the sample was subjected to annealing treatment.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators A: Physical - Volume 278, 1 August 2018, Pages 127-139
Journal: Sensors and Actuators A: Physical - Volume 278, 1 August 2018, Pages 127-139
نویسندگان
Hemant Ghadi, Punam Murkute, Anupam Ghosh, Shyam Murli Manohar Dhar Dwivedi, Aniruddha Mondal, Subhananda Chakrabarti,