Статья

Nociceptive Memristor

Yumin KimDepartment of Materials Science and Engineering, and Inter‐University Semiconductor Research Center College of Engineering Seoul National University Seoul 151‐744 Republic of KoreaYoung Jae KwonDepartment of Materials Science and Engineering, and Inter‐University Semiconductor Research Center College of Engineering Seoul National University Seoul 151‐744 Republic of KoreaDae Eun KwonDepartment of Materials Science and Engineering, and Inter‐University Semiconductor Research Center College of Engineering Seoul National University Seoul 151‐744 Republic of KoreaKyung Jean YoonDepartment of Materials Science and Engineering, and Inter‐University Semiconductor Research Center College of Engineering Seoul National University Seoul 151‐744 Republic of KoreaJung Ho YoonDepartment of Electrical and Computer Engineering University of Massachusetts Amherst MA 01003 USASijung YooDepartment of Materials Science and Engineering, and Inter‐University Semiconductor Research Center College of Engineering Seoul National University Seoul 151‐744 Republic of KoreaHae Jin KimDepartment of Materials Science and Engineering, and Inter‐University Semiconductor Research Center College of Engineering Seoul National University Seoul 151‐744 Republic of KoreaTae Hyung ParkDepartment of Materials Science and Engineering, and Inter‐University Semiconductor Research Center College of Engineering Seoul National University Seoul 151‐744 Republic of KoreaJin‐Woo HanCenter for Nanotechnology NASA Ames Research Center Moffett Field CA 94035 USAKyung Min KimHewlett Packard Laboratories Hewlett Packard Enterprise Palo Alto CA 94304 USACheol Seong HwangDepartment of Materials Science and Engineering, and Inter‐University Semiconductor Research Center College of Engineering Seoul National University Seoul 151‐744 Republic of Korea

2018en

ABI

Аннотация

Abstract The biomimetic characteristics of the memristor as an electronic synapse and neuron have inspired the advent of new information technology in the neuromorphic computing. The application of the memristors can be extended to the artificial nerves on condition of the presence of electronic receptors which can transfer the external stimuli to the internal nerve system. In this work, nociceptor behaviors are demonstrated from the Pt/HfO 2 /TiN memristor for the electronic receptors. The device shows four specific nociceptive behaviors; threshold, relaxation, allodynia, and hyperalgesia, according to the strength, duration, and repetition rate of the external stimuli. Such nociceptive behaviors are attributed to the electron trapping/detrapping to/from the traps in the HfO 2 layer, where the depth of trap energy level is ≈0.7 eV. Also, the built‐in potential by the work function mismatch between the Pt and TiN electrodes induces time‐dependent relaxation of trapped electrons, providing the appropriate relaxation behavior. The relaxation time can take from several milliseconds to tens of seconds, which corresponds to the time span of the decay of biosignal. The material‐wise evaluation of the electronic nociceptor in comparison with other material, which did not show the desired functionality, Pt/Ti/HfO 2 /TiN, reveals the importance of careful material design and fabrication.

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Идентификаторы

DOI: 10.1002/adma.201704320

Цитирования и источники

Цитирований: 2Использованных источников: 0

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