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Flexible and fully biodegradable resistance random access memory based on a gelatin dielectric
Shuting Liu1, Shurong Dong1, Xingang Wang2
1Key Laboratory of Micro-nano Electronic Devices and Smart Systems of Zhejiang Province, College of Information Science & Electronic Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China.
Nanotechnology
|February 27, 2020
Summary
Researchers developed fully biodegradable flexible memory devices using gelatin and poly(lactide-co-glycolide) acid (PLGA). These sustainable electronics offer reliable performance and controlled degradation for future implantable applications.
Area of Science:
- Materials Science
- Biomedical Engineering
- Electronics Engineering
Background:
- Growing concerns regarding healthcare waste and environmental sustainability drive the need for biodegradable electronic devices.
- Current electronic implants pose challenges due to their persistence in the body and the environment.
- Development of biocompatible and degradable electronics is crucial for sustainable technological advancement.
Purpose of the Study:
- To develop a fully biodegradable and flexible resistance random-access memory (RRAM) device.
- To utilize low-cost biomaterials for fabricating sustainable electronic components.
- To investigate the performance and degradation characteristics of the developed RRAM.
Main Methods:
- Fabrication of a flexible RRAM device using gelatin as the dielectric layer and poly(lactide-co-glycolide) acid (PLGA) as the substrate.
- Characterization of the device's nonvolatile resistive switching properties, including retention time and on/off resistance ratio.
- Evaluation of the device's mechanical flexibility through bending tests.
- Assessment of the degradation behavior in deionized water and phosphate-buffered saline (PBS) solution.
Main Results:
- The fabricated RRAM devices demonstrated reliable nonvolatile resistive switching characteristics.
- The devices exhibited a long retention time exceeding 10^4 seconds.
- A consistent on/off resistance ratio of approximately 10^2 was maintained even after 200 bending cycles.
- Complete degradation of the devices was observed in aqueous environments, with PLGA degrading in approximately 6 months.
Conclusions:
- A fully biodegradable and flexible RRAM device was successfully developed using gelatin and PLGA.
- The device shows promising potential for flexible electronics applications due to its reliable performance and mechanical robustness.
- The tunable degradation rate of the PLGA substrate allows for the design of biodegradable electronics with specific dissolution times, addressing environmental concerns.
