2012. Hyunhee Baek, Chanwoo Lee, Kwang-il Lim, and Jinhan Cho. "Resistive switching memory properties of layer-by-layer assembled enzyme multilayers" / Nanotechnology (Top 20% journal)

March 28, 2012


The properties of enzymes, which can cause reversible changes in currents through redox reactions in solution, are of fundamental and practical importance in bio-electrochemical applications. These redox properties of enzymes are often associated with their charge-trap sites. Here, we demonstrate that reversible changes in resistance in dried lysozyme (LYS) films can be generated by an externally applied voltage as a result of charge trap/release. Based on such changes, LYS can be used as resistive switching active material for nonvolatile memory devices. In this study, cationic LYS and anionic poly(styrene sulfonate) (PSS) layers were alternately deposited onto Pt-coated silicon substrates using a layer-by-layer assembly method. Then, top electrodes were deposited onto the top of LYS/PSS multilayers to complete the fabrication of the memory-like device. The LYS/PSS multilayer devices exhibited typical resistive switching characteristics with an ON/OFF current ratio above 10(2), a fast switching speed of 100 ns and stable performance. Furthermore, the insertion of insulating polyelectrolytes (PEs) between the respective LYS layers significantly enhanced the memory performance of the devices showing a high ON/OFF current ratio of ~10(6) and low levels of power consumption.




PMID: 22456233  DOI: 10.1088/0957-4484/23/15/155604

Share on Facebook
Share on Twitter
Please reload

Recent Posts
Please reload

© 2023 by Kathy Schulders. Proudly created with Wix.com  

  • Grey Twitter Icon