Thin Films of Amorphous and Hydrated Vanadium Oxides: Growth, Properties and Applications

Pergament, A. L.; Стефанович, Г. Б.; Kazakova, E. L.; Stefanovich, D. G.; Velichko, Andrei

doi:10.4028/www.scientific.net/ssp.90-91.97

Cited by 4 publications

(8 citation statements)

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“…For anodic oxidation of vanadium the electrolyte was made up of 22 g of benzoic acid (C 6 H 5 COOH) and 2-50 ml of a saturated aqueous solution of borax (Na 2 B 4 O 7 × 10H 2 O) per 1 l of acetone [9,22]. Salicylic (o-oxybenzoic) and gallic (trioxybenzoic) acids were also used instead of benzoic acid in some cases.…”

Section: Methodsmentioning

confidence: 99%

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Anodic oxidation of vanadium and properties of vanadium oxide films

Стефанович

Pergament

Velichko

et al. 2004

J. Phys.: Condens. Matter

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Thin films of amorphous vanadium oxide have been prepared by electrochemical anodic oxidation. The phase composition of anodic films on vanadium has been shown to depend on the oxidation conditions (electrolyte composition, oxidation current, and time), and the stoichiometry can be controlled from VO 2 to V 2 O 5 . Physical properties of the oxide films, including the metal-insulator transition in amorphous VO 2 , are studied. In addition, it is shown that non-equilibrium electrochemical oxidation leads to the formation of metastable vanadium oxides with extremely high sensitivity to laser (∼1 mJ cm −2 ) and electron-beam (∼10 µC cm −2 ) irradiation. Such films are of considerable technical interest, particularly because of potential applications as an efficient resist material for both photonanolithography and electron-beam nanolithography.

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Section: Methodsmentioning

confidence: 99%

“…Exposure doses were varied in the ranges from 0.1 to 100 mJ cm −2 and 5 to 1000 µC cm −2 , respectively. The sample preparation procedures, as well as some details of experimental and analytical techniques, have been described previously [5,9,22].…”

Section: Methodsmentioning

confidence: 99%

Anodic oxidation of vanadium and properties of vanadium oxide films

Стефанович

Pergament

Velichko

et al. 2004

J. Phys.: Condens. Matter

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“…Switchings in films based on vanadium and its oxides present a matter of much discussion. Both the magnitude and pattern of the effect depend on the composition of the oxide, on the structure of the film (continuous chemical vapor deposition (CVD)‐grown film or suspension consisting of separate nanoparticles), and on the synthesis and formation conditions of the structures . In the case of VO 2 , a temperature‐dependent resistive switching effect was observed: for a VO 2 ‐based film to be switched into the low‐resistive state, heating of the samples to 60–70 °C was required .…”

Section: Introductionmentioning

confidence: 99%

Resistive Switching Effect with ON/OFF Current Relation up to 10⁹ in 2D Printed Composite Films of Fluorinated Graphene with V₂O₅ Nanoparticles

Ivanov

Гутаковский

Kotin

et al. 2019

Adv Elect Materials

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and sulfides (MoS), [10][11][12] have been studied. Extensive studies of composites prepared from conducting and dielectric materials, whose combination enhances the resistive switching effect and improves its stability are underway. For instance, a resistive switching effect with the relation of current in low-resistive (ON) and highresistive (OFF) states amounting to three to five orders was observed in composites consisting of a polymer base and nonorganic nanoparticles, [13][14][15][16][17][18][19][20][21] fully organic polymers, [22] films consisting of a polymer in combination with carbon nanotubes, [23,24] titanium nanotubes, [25] or Cu-SiO 2 nanofilaments. [26] Also, it was shown that graphene oxide (GO) based structures with Au nanoparticles can demonstrate an ON/ OFF current ratio reaching nine orders. [27] Switchings in films based on vanadium and its oxides present a matter of much discussion. Both the magnitude and pattern of the effect depend on the composition of the oxide, [28,29] on the structure of the film (continuous chemical vapor deposition (CVD)-grown film or suspension consisting of separate nanoparticles), [30,31] and on the synthesis and formation conditions of the structures. [32] In the case of VO 2 , a temperature-dependent resistive switching effect was observed: for a VO 2 -based film to be switched into the low-resistive state, heating of the samples to 60-70 °C was required. [33] VO x films (a mixed-valency phase which can contain various compounds, for instance, V 2 O 3 , V 3 O 5 , V 3 O 7, etc. [34] ), synthesized using CVD or application of a nanoparticle suspension (crystal hydrates prepared by sol-gel method, incorporating water molecules V 2 O 5 •nH 2 O with n ≤ 2, and dependent on the annealing temperature of the sample), [35] demonstrate a resistive switching effect due to the action of an electric field. In the majority of cases, this effect was attributed to the formation of filaments which, with the passage of time, (under the action of the field) can become indestructible because of the irreversible migration of oxygen, with the resistive cell no longer returning into the high-resistive state. Oxide V 2 O 5 in the context of the irreversible migration of oxygen proved to be a more stable material, with the resistive switching effect observed without additional heating of the structure. On the whole, in vanadium oxide (V 2 O 5 ) compounds a resistive switching effect with an ON/OFF current Composite films consisting of fluorinated graphene flakes with vanadium oxide (V 2 O 5 ) nanoparticles exhibit a stable bipolar resistive switching effect that depends on the size of the composite particles, on the proportion between the film components, on the heat-treatment conditions of the films (or on the hydration degree of V 2 O 5 nanoparticles), and on the area of the structures. The ON/OFF current ratio of printed crossbar structures reaches 10 6 -10 9 for films 20-50 nm thick, with the switching voltage varying in the range from 1.5 to 3.7 V, 30 ns time for structure switchi...

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“…[22][23][24] RS can be volatile or non-volatile, which can be used to emulate neuron or synapse behaviors, respectively. [25][26][27][28][29][30][31][32][33] Multiple groups have used RS to achieve synaptic functionalities, and memristor crossbar arrays have already been used to perform pattern recognition. [34][35][36][37][38] These synapse realizations, however, still rely on traditional electronics to play the role of neurons (neuristors).…”

Section: Introductionmentioning

confidence: 99%

Thermal Management in Neuromorphic Materials, Devices, and Networks

2023

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Machine learning has experienced unprecedented growth in recent years, often referred to as an “artificial intelligence revolution.” Biological systems inspire the fundamental approach for this new computing paradigm: using neural networks to classify large amounts of data into sorting categories. Current machine‐learning schemes implement simulated neurons and synapses on standard computers based on a von Neumann architecture. This approach is inefficient in energy consumption, and thermal management, motivating the search for hardware‐based systems that imitate the brain. Here, the present state of thermal management of neuromorphic computing technology and the challenges and opportunities of the energy‐efficient implementation of neuromorphic devices are considered. The main features of brain‐inspired computing and quantum materials for implementing neuromorphic devices are briefly described, the brain criticality and resistive switching‐based neuromorphic devices are discussed, the energy and electrical considerations for spiking‐based computation are presented, the fundamental features of the brain's thermal regulation are addressed, the physical mechanisms for thermal management and thermoelectric control of materials and neuromorphic devices are analyzed, and challenges and new avenues for implementing energy‐efficient computing are described.

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Thin Films of Amorphous and Hydrated Vanadium Oxides: Growth, Properties and Applications

Cited by 4 publications

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Anodic oxidation of vanadium and properties of vanadium oxide films

Anodic oxidation of vanadium and properties of vanadium oxide films

Resistive Switching Effect with ON/OFF Current Relation up to 10⁹ in 2D Printed Composite Films of Fluorinated Graphene with V₂O₅ Nanoparticles

Thermal Management in Neuromorphic Materials, Devices, and Networks

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Thin Films of Amorphous and Hydrated Vanadium Oxides: Growth, Properties and Applications

Cited by 4 publications

References 0 publications

Anodic oxidation of vanadium and properties of vanadium oxide films

Anodic oxidation of vanadium and properties of vanadium oxide films

Resistive Switching Effect with ON/OFF Current Relation up to 109 in 2D Printed Composite Films of Fluorinated Graphene with V2O5 Nanoparticles

Thermal Management in Neuromorphic Materials, Devices, and Networks

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Resistive Switching Effect with ON/OFF Current Relation up to 10⁹ in 2D Printed Composite Films of Fluorinated Graphene with V₂O₅ Nanoparticles