Solvothermal synthesis of TiO 2 nanospheres for non-volatile memory and synaptic learning applications.

Autor: Nikam AS; Computational Electronics and Nanoscience Research Laboratory, School of Nanoscience and Biotechnology, Shivaji University, Kolhapur 416004, India., Kamble GU; Optoelectronics Convergence Research Center and Department of Materials Science and Engineering, Chonnam National University, 300, Yongbong-Dong, Buk-Gu, Gwangju, 61186, Republic of Korea., Patil AR; Department of Physics, Shivaji University, Kolhapur 416004, India., Patil SB; Centre for Interdisciplinary Research, D. Y. Patil Education Society (Deemed to be University), Kasaba Bawada, Kolhapur 416006, Maharashtra, India., Sheikh AD; Centre for Nanoscience and Nanotechnology, Amity University Maharashtra, Somathne, Mumbai, 410206, Maharashtra, India., Takaloo AV; Department of Chemical and Process Engineering, University of Canterbury, Christchurch, 8140, New Zealand., Gaikwad PK; Department of Electronics, Shivaji University, Kolhapur 416004, India., Kamat RK; Department of Electronics, Shivaji University, Kolhapur 416004, India.; Dr. Homi Bhabha State University, 15, Madam Cama Road, Mumbai, 400032, India., Kim JH; Optoelectronics Convergence Research Center and Department of Materials Science and Engineering, Chonnam National University, 300, Yongbong-Dong, Buk-Gu, Gwangju, 61186, Republic of Korea., Dongale TD; Computational Electronics and Nanoscience Research Laboratory, School of Nanoscience and Biotechnology, Shivaji University, Kolhapur 416004, India.
Jazyk: angličtina
Zdroj: Nanotechnology [Nanotechnology] 2023 Aug 02; Vol. 34 (42). Date of Electronic Publication: 2023 Aug 02.
DOI: 10.1088/1361-6528/ace830
Abstrakt: In this study, we used the one-pot solvothermal method to synthesize the TiO 2 nanospheres (NSs) and used them for non-volatile memory and neuromorphic computing applications. Several analytical tools were used to understand the structural, optical, morphological, and compositional characteristics of synthesized TiO 2 NSs. The tetragonal crystal structure of anatase TiO 2 was formed, according to the Rietveld refined x-ray diffraction results. The NS morphology was confirmed by field emission scanning electron microscopy and transmission electron microscopy images. X-ray photoelectron spectroscopy was probed to understand the elemental composition and electronic states of the TiO 2 NSs. We specifically looked at the impact of reaction time on the structural, optical, morphological, compositional, and resistive switching (RS) properties of TiO 2 NSs. The fabricated devices (Ag/TiO 2 NSs/FTO) exhibit bipolar RS behavior. The optimized RS device shows good endurance (5000 cycles) and memory retention (5000 s) properties. Moreover, fabricated devices showed double-valued charge-flux characteristics, whereas charge transport was caused by the Ohmic and space charge-limited current mechanisms. Additionally, the optimized device can mimic various synaptic characteristics including potentiation-depression, excitatory post-synaptic current, and paired-pulse facilitation.
(© 2023 IOP Publishing Ltd.)
Databáze: MEDLINE
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