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Particle size-dependent electrical resistances of WO3 nanofibers

机译:WO3纳米纤维的粒度依赖性电阻

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This work reports the fabrication steps and the particle size-dependent electrical resistances of WO3 nanofibers produced by an electrospinning technique. The nanofibers are prepared by mixing ammonium metatungstate hydrate (AMH) in deionized water at various concentrations with polyvinyl alcohol (PVA). Such mixture is then electrospun onto platinum interdigitated electrodes, following by a hot pressing and calcination processes. It is found that lower precursor concentrations and lower calcination temperatures resulted in smaller WO3 particles consisting in the nanofibers. Particle size-dependent electrical resistances are found in these nanofibers, and are believed to be related to the size of the space-charge layer in individual WO3 particle. This study provides information about synthesis parameters used to control physical dimensions of the WO3 particles and the magnitudes of the electrical resistances associated with the structures.
机译:该工作报告了通过静电纺丝技术生产的WO3纳米纤维的制造步骤和粒径依赖性电阻。纳米纤维通过用聚乙烯醇(PVA)以各种浓度在各种浓度下与去离子水中的咪钨酸盐水合物(AMH)混合来制备。然后将这种混合物电纺在铂中的电极上,通过热压和煅烧方法。发现较低的前体浓度和更低的煅烧温度导致较小的WO3颗粒在纳米纤维中组成。在这些纳米纤维中发现粒径依赖性电阻,并且被认为与个体WO3颗粒中的空穴电荷层的尺寸有关。该研究提供了有关用于控制WO3颗粒的物理尺寸的合成参数的信息以及与结构相关联的电阻的大小。

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