Direct growth of tungsten oxide nanorods from heated tungsten foils

Highly selective conversion of guaiacol to tert-butylphenols in supercritical ethanol over a H2WO4 catalyst

“…However, the technique that synthesis H 2 WO 4 through WO 3 has already been realized in the recovery of waste tungsten materials. 54,55 4 Conclusions…”

Thermal‐Oxidative Growth of Substoichiometric WO3–x Nanowires at Mild Conditions

“…The direct thermal oxidation of W metal [ 6,12,25–33 ] has also been proposed as an alternative. Thermal oxidation, which is based on the exposure of a W metal piece or a W‐coated surface to a controlled oxygen‐deficient atmosphere at high temperatures, can in fact enable the growth of oriented WO 3– x NWs.…”

“…The morphology of thermally grown NWs depends on process parameters such as the annealing conditions (atmosphere, temperature, and time) and nature of the substrate (morphology and chemical composition). [ 6,12,25–33 ] The directional growth mechanism provides the resulting NWs high degree of crystallinity, i.e., a single crystalline nature, which can further improve properties such as electron conductivity and consequently the material performances in many applications.…”

纳米粒子薄膜热电子发射性能

“…但是, 随着微波器件对电子束质量要求的进一步提高, 对阴极 的要求也越来越高, 例如要求阴极的发射均匀性要好 [15] , 以免电子注的层流性变差而降低微波器件的 通过率; 要求阴极蒸发要小, 以免降低电子枪的绝缘性能而影响微波器件的可靠性和寿命等特性 [16] . 因此研究人员又把目光转向场发射阴极 [17,18] . 场发射阴极的发射电流密度较大, 但由于它的总电流 偏小, 且发射不均匀, 稳定性差, 以及制备复杂等因素, 从而大大限制了它的应用.…”