Flexible and Waterproof Resistive Random-Access Memory Based on Nitrocellulose for Skin-Attachable Wearable Devices

Jin Hyeok Lee, Sung Pyo Park, Kyungho Park, Hyun Jae Kim

Research output: Contribution to journalArticlepeer-review

39 Citations (Scopus)


Memory for skin-attachable wearable devices for healthcare monitoring must meet a number of requirements, including flexibility and stability in external environments. Among various memory technologies, organic-based resistive random-access memory (RRAM) devices are an attractive candidate for skin-attachable wearable devices due to the high flexibility of organic materials. However, organic-based RRAMs are particularly vulnerable to external moisture, making them difficult to apply as skin-attachable wearable devices. In this research, RRAMs are fabricated that meet the requirements for skin-attachable wearable devices using a novel organic material, nitrocellulose (NC), which is biocompatible with high water-resistance and high flexibility. The fabricated NC-based RRAMs show a stable bipolar resistive switching characteristic. In addition, the formation of a native Al oxide between Al and NC is verified, which is the source of the bipolar switching characteristic of NC-based RRAMs. Furthermore, electrical and chemical analysis is conducted after dipping and submersion into various solutions as well as deionized water to confirm the water-resistance of the NC-based RRAMs. Finally, it is also confirmed that NC-based RRAMs are suitable for use in skin-attachable wearable devices through a flexibility test. In conclusion, this study suggests that NC-based RRAMs can be applied in skin-attachable wearable devices, simplifying healthcare in the future.

Original languageEnglish
Article number1907437
JournalAdvanced Functional Materials
Issue number1
Publication statusPublished - 2020 Jan 1

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) Grant funded by the Korea government (MSIT) (No. 2017R1A2B3008719).

Publisher Copyright:
© 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics


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