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Scalable Syntheses of Graphene Oxide and Reduced Graphene Oxide using Cascade Design Oxidation and Highly Basic Reduction Reactions
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Highly Stable Persistent Photoconductivity with Suspended Graphene Nanoribbons
Hiroo Suzuki1, Noritada Ogura1, Toshiro Kaneko1
1Department of Electronic Engineering, Tohoku University, Aoba 6-6-05, Aramaki, Aoba-ku, Sendai, 980-8579, Japan.
Scientific Reports
|August 9, 2018
Summary
Graphene nanoribbons (GNRs) demonstrate persistent photoconductivity (PPC) and stable memory operation, paving the way for advanced optoelectrical devices and sensors.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Nanotechnology
Background:
- Graphene nanoribbons (GNRs), or 1D graphene, possess a tunable band gap, making them promising for electronics.
- While GNRs show potential in electrical devices, their optoelectrical applications remain largely unexplored.
Purpose of the Study:
- To investigate the optoelectrical properties of suspended GNR devices.
- To assess the potential of GNRs in applications like non-volatile memory and sensors.
Main Methods:
- Fabrication and characterization of suspended GNR devices.
- Measurement of photoconductivity decay times and environmental stability.
- Demonstration of non-volatile memory operation using GNR-based PPC devices.
Main Results:
- Suspended GNR devices exhibit persistent photoconductivity (PPC) with exceptionally long decay times exceeding 72 hours.
- These GNR devices demonstrate adequate environmental stability.
- Repeated non-volatile memory operations were successfully achieved using the integrated PPC device.
Conclusions:
- Graphene nanoribbons show significant promise for optoelectrical applications due to their stable persistent photoconductivity.
- The developed GNR-based PPC devices are suitable for ultra-low-power non-volatile memory, nanoscale imaging, and biological sensing.
- This research opens new avenues for exploring GNRs in diverse optoelectrical fields.
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