Synthesis, functionalization, and environmental stabilization of ZnO nanobridge transducers for gas and liquid-phase sensing |
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Authors: | A.D. MasonAuthor VitaeC.-C. HuangAuthor Vitae S. KondoAuthor VitaeM.T. KoesdjojoAuthor Vitae Y.H. TennicoAuthor Vitae V.T. RemchoAuthor VitaeJ.F. Conley Jr.Author Vitae |
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Affiliation: | a School of Electrical Engineering and Computer Science, Oregon State University, 1148 Kelley Engineering Center, Corvallis, OR 97331, United States b Department of Chemistry, Oregon State University, 153 Gilbert Hall, Corvallis, OR 97331, United States |
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Abstract: | Three methods of functionalizing ZnO NW surfaces with biotin were demonstrated. Biotinylated ZnO NWs were found to dissolve during exposure to deionized (DI) water, so a chemical vapor deposition (CVD) process was developed for parylene-A, a common moisture barrier with an amine group which allows further functionalization. Parylene-A coated ZnO NWs were found to be resistant to dissolution. Electrical measurements on parylene-A coated nanobridge devices showed normal operation with higher dark current and an attenuated response to UV and O2, indicating the ability to modulate environmental sensitivity. This work demonstrates the novel use of parylene-A coatings as an encapsulation layer as well as a potential starting platform for general functionalization of ZnO NW devices for selective sensing. |
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Keywords: | ZnO Nanowires Functionalization Sensors |
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