Thermal conductivity of V<sub>2</sub>O<sub>5</sub> nanowires and their contact thermal conductance

Wang, Qilang; Liang, Xing; Liu, Bohai; Song, Yihui; Xu, Xiangfan

doi:10.1039/c9nr08803b

Cited by 22 publications

(10 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[ 17 ] The field has recently expanded into a wider range of nanomaterials, including metal, [ 18 ] metal oxide, [ 19 ] carbon, [12b, 20] silicon, [ 21 ] semiconductor quantum dots, [ 22 ] and their hybrids, [12c, 12d, 13a, 23] while only have some of these properties. In parallel to the developed materials, vanadium displays attractive thermal [ 24 ] and optoelectronic properties, [ 25 ] which can play the role of an electron‐conducting tunnel. In addition, mesoporous silica has attracted considerable attention due to tuneable pore size, excellent stability, and high surface area, [ 26 ] which makes it an ideal candidate as a surface host for vanadium.…”

Section: Introductionmentioning

confidence: 99%

Vanadium Core–Shell Nanorods Inspect Metabolic Changes of Diabetic Retinopathy

Vedarethinam

Huang

Zhang

et al. 2020

Adv Funct Materials

View full text Add to dashboard Cite

Diabetic retinopathy (DR) is the most common microvascular complication of diabetes and ranks as the fifth leading cause of visual impairment, but an understanding of DR development has been hampered by the lack of an efficient metabolomic tool. Herein, vanadium core–shell nanorods are developed for metabolic fingerprinting to probe molecular variation in DR. First, a series of vanadium core–shells are constructed with different elemental composition and structural parameters, using silica nanorods to support vanadium oxide. The plasma metabolic fingerprints (MFs) are extracted by the optimized vanadium core–shell nanorod‐assisted laser desorption/ionization mass spectrometry, by analyzing 500 nL of native plasma in seconds. As a result, DR patients are differentiated from non DR controls with a sensitivity of 94% and specificity of 90% using a classification model built on the plasma MFs. Furthermore, DR progression is monitored by a panel of plasma metabolic signatures with gradual changes. This work provides an advanced molecular tool for the metabolomic characterization of DR and may guide the clinical decision making in DR for personalized medicine in the future.

show abstract

Section: Introductionmentioning

confidence: 99%

Vanadium Core–Shell Nanorods Inspect Metabolic Changes of Diabetic Retinopathy

Vedarethinam

Huang

Zhang

et al. 2020

Adv Funct Materials

View full text Add to dashboard Cite

show abstract

“…The analysis of the thermal conductance would be trivial without considering the contact thermal resistance. To further determine the result of the contact thermal resistance measured in the thermal bridge method, we measured it at room temperature directly by the electron-beam self-heating method [ 24 , 25 , 26 ]. The electron-beam self-heating method was developed on the basis of the suspended thermal bridge method, where the temperature change is monitored by the resistance change of two suspended thermometers, R h and R s .…”

Section: Resultsmentioning

confidence: 99%

Thermal Conductivity of VO2 Nanowires at Metal-Insulator Transition Temperature

Wang

2021

Nanomaterials

Self Cite

View full text Add to dashboard Cite

Vanadium dioxide (VO2) nanowires endowed with a dramatic metal−insulator transition have attracted enormous attention. Here, the thermal conductance of VO2 nanowires with different sizes, measured using the thermal bridge method, is reported. A size-dependent thermal conductivity was observed where the thicker nanowire showed a higher thermal conductivity. Meanwhile, the thermal conductivity jump at metal−insulator transition temperature was measured to be much higher in the thicker samples. The dominant heat carriers were phonons both at the metallic and the insulating regimes in the measured samples, which may result from the coexistence of metal and insulator phases at high temperature. Our results provide a window into exploring the mechanism of the metal−insulator transition of VO2 nanowires.

show abstract

“…The thermal parameters of the vanadium-oxides were taken from literature values. The thermal conductivity of the VO 2 was given by step function, considering that it changes during the phase transition: κ normalV normalO 2 = 3.5 W/mK if T < T c and κ normalV normalO 2 = 6 W/mK if T > T c . , The thermal conductivity of V 2 O 5 varies in wide range in the literature, between 0.45 and 3.84 W/mK, according to the crystalline structure and measurement methods. , We used an intermediate value of κ normalV 2 normalO 5 = 1.75 W/mK, which was measured on crystalline, 150 nm thick film . For the metal electrodes we used the built-in values of κ Au = 311W/mK and κ Ti = 21.9W/mK for the thermal conductivity and σ Au = 45.6 · 10 6 S/m and σ Ti = 2.6 · 10 6 S/m for the electrical conductivity.…”

Section: Methodsmentioning

confidence: 99%

Interplay of Thermal and Electronic Effects in the Mott Transition of Nanosized VO₂ Phase Change Memory Devices

Pósa,

Hornung,

Török

et al. 2023

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

Volatile memory devices relying on the Mott-type insulator-to-metal transition of vanadium oxide (VO2) are widely utilized in the field of neuromorphic computing. Such devices, however, are realized in a nanoscale geometry, where the switching relies on the self-heating of an ultrasmall spot as well as the presence of extremely high electric fields in the active region. In this paper, we investigate the interplay of such nanoscale thermal and nonlinear electronic phenomena by investigating the temperature and voltage dependent conduction properties of our custom-designed VO2 devices, where a V-shaped electrode focuses the switching to an ultrasmall single-spot active region. This simplified spatial structure of the active volume facilitates the device modeling and the identification of physical mechanisms behind the phase transition. We find that purely thermal or electronic effects fail to describe the device operation, however, according to our finite element simulations, a combined electronic and thermal model provides a precise description of the device characteristics. These results facilitate the understanding as well as the thermal and electronic design of novel VO2-based neuronal devices.

show abstract

Thermal conductivity of V₂O₅ nanowires and their contact thermal conductance

Abstract: Thermal measurements of V2O5 nanowires suggest the vital role of interfacial thermal resistance in the heat dissipation in Li-ion batteries.

Cited by 22 publications

References 39 publications

Vanadium Core–Shell Nanorods Inspect Metabolic Changes of Diabetic Retinopathy

Vanadium Core–Shell Nanorods Inspect Metabolic Changes of Diabetic Retinopathy

Thermal Conductivity of VO2 Nanowires at Metal-Insulator Transition Temperature

Interplay of Thermal and Electronic Effects in the Mott Transition of Nanosized VO₂ Phase Change Memory Devices

Contact Info

Product

Resources

About

Thermal conductivity of V2O5 nanowires and their contact thermal conductance

Abstract: Thermal measurements of V2O5 nanowires suggest the vital role of interfacial thermal resistance in the heat dissipation in Li-ion batteries.

Cited by 22 publications

References 39 publications

Vanadium Core–Shell Nanorods Inspect Metabolic Changes of Diabetic Retinopathy

Vanadium Core–Shell Nanorods Inspect Metabolic Changes of Diabetic Retinopathy

Thermal Conductivity of VO2 Nanowires at Metal-Insulator Transition Temperature

Interplay of Thermal and Electronic Effects in the Mott Transition of Nanosized VO2 Phase Change Memory Devices

Contact Info

Product

Resources

About

Thermal conductivity of V₂O₅ nanowires and their contact thermal conductance

Interplay of Thermal and Electronic Effects in the Mott Transition of Nanosized VO₂ Phase Change Memory Devices