Structural transition and temperature-driven conductivity switching of single crystalline VO<sub>2</sub>(A) nanowires

Wang, Chengqian; Liu, Xiangli; Shao, Jian; Xiong, Weiming; Ma, Wenjing; Zheng, Yue

doi:10.1039/c4ra12392a

Cited by 18 publications

(23 citation statements)

References 37 publications

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“…Table 4 summarize some typical published papers of VO 2 (A), which demonstrates VO 2 (A) does not have rich morphologies as VO 2 (B), and nanorod, nanobelt, or nanowire are the common shapes . Such one‐dimensional nanostructures possess excellent surface activities and have short Li‐ion insertion/extraction distances, which is beneficial for electrochemical batteries .…”

Section: Hydrothermal Combined Thermal Treatment Synthesis Of Vo2(m)mentioning

confidence: 99%

Hydrothermal Synthesis of VO₂ Polymorphs: Advantages, Challenges and Prospects for the Application of Energy Efficient Smart Windows

Magdassi

Gao

et al. 2017

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Vanadium dioxide (VO ) is a widely studied inorganic phase change material, which has a reversible phase transition from semiconducting monoclinic to metallic rutile phase at a critical temperature of τ ≈ 68 °C. The abrupt decrease of infrared transmittance in the metallic phase makes VO a potential candidate for thermochromic energy efficient windows to cut down building energy consumption. However, there are three long-standing issues that hindered its application in energy efficient windows: high τ , low luminous transmittance (T ), and undesirable solar modulation ability (ΔT ). Many approaches, including nano-thermochromism, porous films, biomimetic surface reconstruction, gridded structures, antireflective overcoatings, etc, have been proposed to tackle these issues. The first approach-nano-thermochromism-which is to integrate VO nanoparticles in a transparent matrix, outperforms the rest; while the thermochromic performance is determined by particle size, stoichiometry, and crystallinity. A hydrothermal method is the most common method to fabricate high-quality VO nanoparticles, and has its own advantages of large-scale synthesis and precise phase control of VO . This Review focuses on hydrothermal synthesis, physical properties of VO polymorphs, and their transformation to thermochromic VO (M), and discusses the advantages, challenges, and prospects of VO (M) in energy-efficient smart windows application.

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Section: Hydrothermal Combined Thermal Treatment Synthesis Of Vo2(m)mentioning

confidence: 99%

Hydrothermal Synthesis of VO₂ Polymorphs: Advantages, Challenges and Prospects for the Application of Energy Efficient Smart Windows

Magdassi

Gao

et al. 2017

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“…VO 2 (A) is a TMO at ambient pressure and undergoes a thermally driven IMT at T C 162 • C from a low-T tetragonal phase (LTP-A L ) to a high-T body-center tetragonal phase (HTP-A H ) [17][18][19]. Moreover, reports on VO 2 (A) nanorods [20][21][22] strongly suggest they have coupling of electronic and structural phase transitions (at 210 • C > T C ) weaker than that of VO 2 (M) [2] with a similar band gap ∼ 0.6 eV [23]. The relationship between the IMT and the accompanying structural changes in VO 2 (A) nanorods drives pressureinduced metallization (PIM) and amorphization (PIA) at 300 K [24].…”

Section: Introductionmentioning

confidence: 99%

Phase coexistence and pressure-temperature phase evolution of VO2(A) nanorods near the semiconductor-semiconductor transition

Samanta

Cheng

et al. 2017

Phys. Rev. B

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A comprehensive understanding of the physical origins of the phase transition behaviors of transition metal oxides is still complex due to the interplay among competing interactions of comparable strengths tuning their nature. Widespread interest in such phase transitions has motivated explorations of nanocrystalline vanadium dioxide (VO 2) in various forms and a long-running debate persists over the roles played by electron-electron correlation with lattice distortion. External stimuli like pressure and temperature have strong effects on the appearance, stability, and spacial distribution of the high-resistive (HR) and low-resistive (LR) phases accompanying their structural modification. Our comprehensive experiments establish the pressure-induced and thermally driven evolution of phase coexistence in VO 2 (A) nanorods. Our experimental evidence supports coexisting HR and LR phases, where compression suppressed coexistence at ∼7 GPa, followed by a semiconductor-semiconductor transition at around ∼10 GPa with the absence of pressure-induced metallization. X-ray diffraction revealed lattice distortion with local microscopic strain inhomogeneity in the nanorods, without any discontinuity in the pressure-volume data. We further investigated the vibrational modes and relaxations of the samples related to their thermal expansions. We also found that the pressure-dependent hierarchy of microstructural densification contributed significantly to the resulting transport properties.

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“…A great deal of studies have revealed that the layered structure of VO 2 (B) is helpful to enhance the Li + intercalation performance [6]. However, another layered structure of VO 2 (A) polymorph, which also exhibits a similar structural phase transition from a low-temperature tetragonal structure (A L , P4/ncc) to a high-temperature body-center tetragonal structure (A H , I4/m) [7,8], has gained much less attention. One of the main reasons is that VO 2 (A) is usually absent during preparation of VO 2 polymorphs [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

“…Recently, one-dimensional (1D) VO 2 (A) nanostructures, i.e., nanowires, nanorods, and nanobelts, attracted lots of interests owing to the novel physical and chemical properties [1]. Researchers studied the electric, optical, and electrochemical properties and demonstrated that VO 2 (A) can be potentially used as sensors, optical switching and cathode materials [8,13,14]. However, the studies of VO 2 (A) is still very limited because of the harsh growth conditions.…”

Section: Introductionmentioning

confidence: 99%

PEG-assisted hydrothermal synthesis of VO2(A) nanowires with remarkable optical switching properties

Liu¹,

Xiong²,

Zheng³

2016

Proceedings of the 2016 International Conference on Mechanics, Materials and Structural Engineering

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High quality single crystalline VO 2 (A) nanowires were synthesized by a facile hydrothermal method using oxalic acid as reducing agent and polyethylene glycol 6000 as surfactant. It was found that polyethylene glycol 6000 can effectively accelerate the transformation from V 2 O 5 precursor to VO 2 (B), and there is no intermediate phase V 3 O 7 •H 2 O formed. Thus less time and lower temperature were needed in our hydrothermal method. The investigation of growth mechanism indicates an oriented attachment growth process in the hydrothermal system. In addition, the temperature-dependent optical switching properties have been studied. The results show that VO 2 (A) nanowires exhibit distinct temperature-dependent optical switching properties, which can be potentially explored for optical switching devices.

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Structural transition and temperature-driven conductivity switching of single crystalline VO₂(A) nanowires

Cited by 18 publications

References 37 publications

Hydrothermal Synthesis of VO₂ Polymorphs: Advantages, Challenges and Prospects for the Application of Energy Efficient Smart Windows

Hydrothermal Synthesis of VO₂ Polymorphs: Advantages, Challenges and Prospects for the Application of Energy Efficient Smart Windows

Phase coexistence and pressure-temperature phase evolution of VO2(A) nanorods near the semiconductor-semiconductor transition

PEG-assisted hydrothermal synthesis of VO2(A) nanowires with remarkable optical switching properties

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Structural transition and temperature-driven conductivity switching of single crystalline VO2(A) nanowires

Cited by 18 publications

References 37 publications

Hydrothermal Synthesis of VO2 Polymorphs: Advantages, Challenges and Prospects for the Application of Energy Efficient Smart Windows

Hydrothermal Synthesis of VO2 Polymorphs: Advantages, Challenges and Prospects for the Application of Energy Efficient Smart Windows

Phase coexistence and pressure-temperature phase evolution of VO2(A) nanorods near the semiconductor-semiconductor transition

PEG-assisted hydrothermal synthesis of VO2(A) nanowires with remarkable optical switching properties

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Structural transition and temperature-driven conductivity switching of single crystalline VO₂(A) nanowires

Hydrothermal Synthesis of VO₂ Polymorphs: Advantages, Challenges and Prospects for the Application of Energy Efficient Smart Windows

Hydrothermal Synthesis of VO₂ Polymorphs: Advantages, Challenges and Prospects for the Application of Energy Efficient Smart Windows