在自我协调的有机质子突触突触中接近零功率操作极限
Shuzhi Liu1,2, Zhilong He1, Bin Zhang3
1School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|October 23, 2023
概括
研究人员使用TPPS分子开发了一种有机质子记忆器,用于大脑启发的计算. 这种人工突触实现了非易失性记忆和超低功耗,克服了神经形态工程中的关键挑战.
科学领域:
- 材料科学 材料科学 材料科学
- 神经科学是一个神经科学.
- 电气工程 电气工程
背景情况:
- 开发人工突触对于大脑启发的计算 (神经形态工程) 是至关重要的.
- 在人工突触中同时实现非挥发性内存和超低功耗仍然是一个重大挑战,因为能量屏障悖论.
- 现有的人工突触技术难以满足对能源效率和稳定内存调制的严格要求.
研究的目的:
- 为了合成一种新的有机分子并制造用于高性能人工突触的质子记忆器.
- 为了证明设备导电率的有效和非挥发性调制,以最小的功耗.
- 通过展示神经形态学习规则 (如SRDP和STDP) 来验证人工突触的功能.
主要方法:
- 一个质子储类型分子的合成:4,4',4′′,4'''-(氨酸-5,10,15,20-tetrayl) 四氧化 (硫酸) (TPPS).
- 有机质子记忆器的制造,设备宽度从10μm到100nm不等.
- 设备导电度调制,保留,功耗和突触可塑性 (SRDP,STDP) 的表征.
主要成果:
- 基于TPPS的memristor在64个状态中表现出非挥发性电导度调制,保留时间超过30分钟.
- 实现了对调制 (16.25pW至2.06nW) 和读取 (6.5fW至0.83pW) 的超低功耗,接近零功率极限.
- 成功证明了人工突触行为,包括高峰速度依赖的可塑性 (SRDP) 和高峰时间依赖的可塑性 (STDP),功耗低至0.66-0.82 pW,以及100个LTD/LTP周期.
结论:
- 合成的TPPS分子和制造的有机质子记忆器为高性能人工突触提供了一个有希望的解决方案.
- 该设备有效地解决了能源障碍悖论,使非易失性存储器和超低功耗运行成为可能.
- 这项工作为节能的神经形态计算系统和以大脑为灵感的人工智能铺平了道路.
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