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Oxygen vacancy migration/diffusion induced synaptic plasticity in a single titanate nanobelt.
Nanoscale 2018; 10(13):6069-6079N

Abstract

Neuromorphic computational systems that emulate biological synapses in the human brain are fundamental in the development of artificial intelligence protocols beyond the standard von Neumann architecture. Such systems require new types of building blocks, such as memristors that access a quasi-continuous and wide range of conductive states, which is still an obstacle for the realization of high-efficiency and large-capacity learning in neuromorphoric simulation. Here, we introduce hydrogen and sodium titanate nanobelts, the intermediate products of hydrothermal synthesis of TiO2 nanobelts, to emulate the synaptic behavior. Devices incorporating a single titanate nanobelt demonstrate robust and reliable synaptic functions, including excitatory postsynaptic current, paired pulse facilitation, short term plasticity, potentiation and depression, as well as learning-forgetting behavior. In particular, the gradual modulation of conductive states in the single nanobelt device can be achieved by a large number of identical pulses. The mechanism for synaptic functionality of the titanate nanobelt device is attributed to the competition between an electric field driven migration of oxygen vacancies and a thermally induced spontaneous diffusion. These results provide insight into the potential use of titanate nanobelts in synaptic applications requiring continuously addressable states coupled with high processing efficiency.

Authors+Show Affiliations

Centre for Advanced Materials Joining, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada. nzhou@uwaterloo.ca and Waterloo Institute of Nanotechnology, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada and Department of Mechanics and Mechatronics Engineering, University of Waterloo, Ontario N2L 3G1, Waterloo, Canada.Centre for Advanced Materials Joining, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada. nzhou@uwaterloo.ca and Department of Mechanical Engineering, State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, P. R. China and Department of Physics and Astronomy, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada.Centre for Advanced Materials Joining, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada. nzhou@uwaterloo.ca and Waterloo Institute of Nanotechnology, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada and Department of Mechanics and Mechatronics Engineering, University of Waterloo, Ontario N2L 3G1, Waterloo, Canada.Centre for Advanced Materials Joining, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada. nzhou@uwaterloo.ca and Department of Physics and Astronomy, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada.Centre for Advanced Materials Joining, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada. nzhou@uwaterloo.ca and Waterloo Institute of Nanotechnology, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada and Department of Mechanics and Mechatronics Engineering, University of Waterloo, Ontario N2L 3G1, Waterloo, Canada.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

29546896

Citation

Xiao, Ming, et al. "Oxygen Vacancy Migration/diffusion Induced Synaptic Plasticity in a Single Titanate Nanobelt." Nanoscale, vol. 10, no. 13, 2018, pp. 6069-6079.
Xiao M, Shen D, Musselman KP, et al. Oxygen vacancy migration/diffusion induced synaptic plasticity in a single titanate nanobelt. Nanoscale. 2018;10(13):6069-6079.
Xiao, M., Shen, D., Musselman, K. P., Duley, W. W., & Zhou, Y. N. (2018). Oxygen vacancy migration/diffusion induced synaptic plasticity in a single titanate nanobelt. Nanoscale, 10(13), pp. 6069-6079. doi:10.1039/C7NR09335G.
Xiao M, et al. Oxygen Vacancy Migration/diffusion Induced Synaptic Plasticity in a Single Titanate Nanobelt. Nanoscale. 2018 Mar 29;10(13):6069-6079. PubMed PMID: 29546896.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Oxygen vacancy migration/diffusion induced synaptic plasticity in a single titanate nanobelt. AU - Xiao,Ming, AU - Shen,Daozhi, AU - Musselman,Kevin P, AU - Duley,Walter W, AU - Zhou,Y Norman, PY - 2018/3/17/pubmed PY - 2019/1/11/medline PY - 2018/3/17/entrez SP - 6069 EP - 6079 JF - Nanoscale JO - Nanoscale VL - 10 IS - 13 N2 - Neuromorphic computational systems that emulate biological synapses in the human brain are fundamental in the development of artificial intelligence protocols beyond the standard von Neumann architecture. Such systems require new types of building blocks, such as memristors that access a quasi-continuous and wide range of conductive states, which is still an obstacle for the realization of high-efficiency and large-capacity learning in neuromorphoric simulation. Here, we introduce hydrogen and sodium titanate nanobelts, the intermediate products of hydrothermal synthesis of TiO2 nanobelts, to emulate the synaptic behavior. Devices incorporating a single titanate nanobelt demonstrate robust and reliable synaptic functions, including excitatory postsynaptic current, paired pulse facilitation, short term plasticity, potentiation and depression, as well as learning-forgetting behavior. In particular, the gradual modulation of conductive states in the single nanobelt device can be achieved by a large number of identical pulses. The mechanism for synaptic functionality of the titanate nanobelt device is attributed to the competition between an electric field driven migration of oxygen vacancies and a thermally induced spontaneous diffusion. These results provide insight into the potential use of titanate nanobelts in synaptic applications requiring continuously addressable states coupled with high processing efficiency. SN - 2040-3372 UR - https://www.unboundmedicine.com/medline/citation/29546896/Oxygen_vacancy_migration/diffusion_induced_synaptic_plasticity_in_a_single_titanate_nanobelt_ L2 - https://doi.org/10.1039/C7NR09335G DB - PRIME DP - Unbound Medicine ER -