Zinc Oxide Nanorods Grown on Printed Circuit Board for Extended-Gate Field-Effect Transistor pH Sensor
| Autor: | Nguyen Viet Tuyen, Hong Hanh Mai, Pham Van Thanh, Sai Cong Doanh, Le Thi Quynh Nhu, Nguyen Canh Viet, Do Trung Kien |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Photoluminescence Cost effectiveness Scanning electron microscope Analytical chemistry chemistry.chemical_element 02 engineering and technology Zinc 010402 general chemistry 01 natural sciences symbols.namesake Materials Chemistry Electrical and Electronic Engineering business.industry 021001 nanoscience & nanotechnology Condensed Matter Physics Copper 0104 chemical sciences Electronic Optical and Magnetic Materials chemistry symbols Optoelectronics Field-effect transistor Nanorod 0210 nano-technology business Raman spectroscopy |
| Zdroj: | Journal of Electronic Materials. 46:3732-3737 |
| ISSN: | 1543-186X 0361-5235 |
| DOI: | 10.1007/s11664-017-5369-0 |
| Popis: | Zinc oxide (ZnO) nanorods (NRs) were grown directly on printed circuit boards with a 35-μm-thick copper layer using a seedless galvanic-cell hydrothermal process. The hexagonal structure of the synthesized ZnO NRs was observed by scanning electron microscopy. The microstructural characteristics of the as-grown ZnO NRs were investigated by x-ray diffraction analysis, revealing preferred (002) growth direction. Raman and photoluminescence spectra confirmed the high crystalline quality of the ZnO NRs. As-grown ZnO NRs were then grown for 7 h using the galvanic effect for use as the pH membrane of an extended-gate field-effect transistor pH sensor (pH-EGFET). The current–voltage characteristics showed sensitivity of 15.4 mV/pH and 0.26 (μA)1/2/pH in the linear and saturated region, respectively. Due to their cost effectiveness, low-temperature processing, and ease of fabrication, such devices are potential candidates for use as flexible, low-cost, disposable biosensors. |
| Databáze: | OpenAIRE |
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