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Functionalization and Environmental Stabilization of ZnO Nanobridge Sensors Fabricated using Carbonized Photoresist

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Abstract

ZnO nanobridge sensors were selectively grown and electrically connected using lithographically patterned carbonized photoresist (C-PR). As ZnO is known to dissolve in deionized (DI) water, parylene-A was investigated as a moisture barrier and potential functionalization platform. A chemical vapor deposition (CVD) process for parylene-A was developed and it was demonstrated that parylene-A coated ZnO NWs do not show any signs of dissolution after 24 hours in an aqueous solution. The impact of the parylene-A coating on the electrical performance and sensitivity of ZnO nanobridge devices was investigated. A comparison of UV, O2, and H2O sensitivity between uncoated and coated devices revealed that a thin coating of parylene-A attenuated all of these responses, suggesting the ability to modulate environmental sensitivity using this non-covalently bound polymer passivation layer.

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Authors and Affiliations

  1. School of Electrical Engineering and Computer Science, Oregon State University, OR, 97331, Corvallis, USA

    Ashley D. Mason, Chien-Chih Huang, Nate D. Stephon & John F. Conley Jr.

  2. Department of Chemistry, Oregon State University, OR, 97331, Corvallis, USA

    Myra T. Koesdjojo & Vincent T. Remcho

Authors
  1. Ashley D. Mason
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  2. Chien-Chih Huang
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  3. Myra T. Koesdjojo
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  4. Nate D. Stephon
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  5. Vincent T. Remcho
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  6. John F. Conley Jr.
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Mason, A.D., Huang, CC., Koesdjojo, M.T. et al. Functionalization and Environmental Stabilization of ZnO Nanobridge Sensors Fabricated using Carbonized Photoresist. MRS Online Proceedings Library 1350, 1106 (2011). https://doi.org/10.1557/opl.2011.1334

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