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Keywords = α-Fe2O3 nanowire arrays

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12 pages, 2121 KB  
Article
Facile Hydrothermal Synthesis and Resistive Switching Mechanism of the α-Fe2O3 Memristor
by Zhiqiang Yu, Qingcheng Wang, Jinhao Jia, Wenbo Kang, Meilian Ou and Zhimou Xu
Molecules 2024, 29(23), 5604; https://doi.org/10.3390/molecules29235604 - 27 Nov 2024
Cited by 7 | Viewed by 2391
Abstract
Among the transition metal oxides, hematite (α-Fe2O3) has been widely used in the preparation of memristors because of its excellent physical and chemical properties. In this paper, α-Fe2O3 nanowire arrays with a preferred orientation along the [...] Read more.
Among the transition metal oxides, hematite (α-Fe2O3) has been widely used in the preparation of memristors because of its excellent physical and chemical properties. In this paper, α-Fe2O3 nanowire arrays with a preferred orientation along the [110] direction were prepared by a facile hydrothermal method and annealing treatment on the FTO substrate, and then α-Fe2O3 nanowire array-based Au/α-Fe2O3/FTO memristors were obtained by plating the Au electrodes on the as-prepared α-Fe2O3 nanowire arrays. The as-prepared α-Fe2O3 nanowire array-based Au/α-Fe2O3/FTO memristors have demonstrated stable nonvolatile bipolar resistive switching behaviors with a high resistive switching ratio of about two orders of magnitude, good resistance retention (up to 103 s), and ultralow set voltage (Vset = +2.63 V) and reset voltage (Vreset = −2 V). In addition, the space charge-limited conduction (SCLC) mechanism has been proposed to be in the high resistance state, and the formation and destruction of the conductive channels modulated by oxygen vacancies have been suggested to be responsible for the nonvolatile resistive switching behaviors of the Au/α-Fe2O3/FTO memristors. Our results show the potential of the Au/α-Fe2O3/FTO memristors in nonvolatile memory applications. Full article
(This article belongs to the Topic Advances on the Application of Nanomaterials and 2D Materials for Sensors, Solar Cells, Microelectronics, and Optoelectronics)
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12 pages, 1284 KB  
Article
A Facile Hydrothermal Synthesis and Resistive Switching Behavior of α-Fe2O3 Nanowire Arrays
by Zhiqiang Yu, Jiamin Xu, Baosheng Liu, Zijun Sun, Qingnan Huang, Meilian Ou, Qingcheng Wang, Jinhao Jia, Wenbo Kang, Qingquan Xiao, Tinghong Gao and Quan Xie
Molecules 2023, 28(9), 3835; https://doi.org/10.3390/molecules28093835 - 30 Apr 2023
Cited by 9 | Viewed by 2966
Abstract
A facile hydrothermal process has been developed to synthesize the α-Fe2O3 nanowire arrays with a preferential growth orientation along the [110] direction. The W/α-Fe2O3/FTO memory device with the nonvolatile resistive switching behavior has been achieved. The [...] Read more.
A facile hydrothermal process has been developed to synthesize the α-Fe2O3 nanowire arrays with a preferential growth orientation along the [110] direction. The W/α-Fe2O3/FTO memory device with the nonvolatile resistive switching behavior has been achieved. The resistance ratio (RHRS/RLRS) of the W/α-Fe2O3/FTO memory device exceeds two orders of magnitude, which can be preserved for more than 103s without obvious decline. Furthermore, the carrier transport properties of the W/α-Fe2O3/FTO memory device are dominated by the Ohmic conduction mechanism in the low resistance state and trap-controlled space-charge-limited current conduction mechanism in the high resistance state, respectively. The partial formation and rupture of conducting nanofilaments modified by the intrinsic oxygen vacancies have been suggested to be responsible for the nonvolatile resistive switching behavior of the W/α-Fe2O3/FTO memory device. This work suggests that the as-prepared α-Fe2O3 nanowire-based W/α-Fe2O3/FTO memory device may be a potential candidate for applications in the next-generation nonvolatile memory devices. Full article
(This article belongs to the Collection Green Energy and Environmental Materials)
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10 pages, 2789 KB  
Article
Porous α-Fe2O3@C Nanowire Arrays as Flexible Supercapacitors Electrode Materials with Excellent Electrochemical Performances
by Yidi Dong, Lei Xing, Kunfeng Chen and Xiang Wu
Nanomaterials 2018, 8(7), 487; https://doi.org/10.3390/nano8070487 - 1 Jul 2018
Cited by 35 | Viewed by 5472
Abstract
Porous α-Fe2O3 nanowire arrays coated with a layer of carbon shell have been prepared by a simple hydrothermal route. The as-synthesized products show an excellent electrochemical performance with high specific capacitance and good cycling life after 9000 cycles. A solid [...] Read more.
Porous α-Fe2O3 nanowire arrays coated with a layer of carbon shell have been prepared by a simple hydrothermal route. The as-synthesized products show an excellent electrochemical performance with high specific capacitance and good cycling life after 9000 cycles. A solid state asymmetric supercapacitor (ASC) with a 2 V operation voltage window has been assembled by porous α-Fe2O3/C nanowire arrays as the anode materials, and MnO2 nanosheets as the cathode materials, which gives rise to a maximum energy density of 30.625 Wh kg−1and a maximum power density of 5000 W kg−1 with an excellent cycling performance of 82% retention after 10,000 cycles. Full article
(This article belongs to the Special Issue Smart Nanogenerators)
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