Biodegradable and flexible ι-carrageenan based RRAM with ultralow power consumption

• Published in: Chinese physics B 2024-01, Vol.33 (2), p.27301-31
• Main Authors: Bian, Jing-Yao, Tao, Ye, Wang, Zhong-Qiang, Zhao, Xiao-Ning, Lin, Ya, Xu, Hai-Yang, Liu, Yi-Chun
• Format: Article
• Language: English
• Subjects: RRAM; transient electronics; ultralow power consumption; ι-carrageenan
• ISSN: 1674-1056; 2058-3834
• DOI: 10.1088/1674-1056/ad19d4

Transient memories, which can physically disappear without leaving traceable remains over a period of normal operation, are attracting increasing attention for potential applications in the fields of data security and green electronics. Resistive random access memory (RRAM) is a promising candidate for next-generation memory. In this context, biocompatible ι -carrageenan ( ι -car), extracted from natural seaweed, is introduced for the fabrication of RRAM devices (Ag/ ι -car/Pt). Taking advantage of the complexation processes between the functional groups (C–O–C, C–O–H, et al .) and Ag metal ions, a lower migration barrier of Ag ions and a high-speed switching (22.2 ns for SET operation/26 ns for RESET operation) were achieved, resulting in an ultralow power consumption of 56 fJ. And the prepared Ag/ ι -car/Pt RRAM devices also revealed the capacities of multilevel storage and flexibility. In addition, thanks to the hydrophilic groups of ι -car molecule, the RRAM devices can be rapidly dissolved in deionized (DI) water within 13 minutes, showing excellent transient characteristics. This work demonstrates that ι -car based RRAM devices have great potential for applications in secure storage applications, flexible electronics and transient electronics.