Controlled synthesis of patterned W18O49 nanowire vertical-arrays and improved field emission performance by in situ plasma treatment

Change in crystalline structure of W18O49nanowires induced by X-ray irradiation and its effects on field emission

“…Nanoscale protuberances reduce the diameter of the eld emitter and thereby increase the eld enhancement, which will enhance electron eld emission. 26,41 Therefore, the decrease in the threshold eld of the W 18 O 49 nanowires was observed when the irradiation dose increased to 3.6 Â 10 15 phs cm À2 .…”

“…Excellent eld emission performance, including low turn-on eld, high current density, good stability, and high uniformity, has been reported for various one-dimensional tungsten oxide nanomaterials. [19][20][21][22][23][24][25][26][27][28][29] For example, in 2003, Li et al reported that W 18 O 49 nanotubes and nanowires can be prepared by heating tungsten foil under vacuum conditions and investigated their eld emission properties; the turn-on eld was only 2.6 MV m À1 . 19 Zhou et al used two thermal evaporation processes to grow W 18 O 49 nanotips; stable eld emission with uctuation of 2.0% at an emission current of 1200 mA over 13 hours and a low turn-on eld of 2.0 MV m À1 were obtained.…”

Interfacial failure mechanism in tungsten fiber reinforced copper-based composites fabricated by combustion synthesis melt infiltration under ultra-high gravity

“…5(c) and (d)) reveal that the single crystal nature of the needle, and the d-spacing of 0.38 nm agrees well with the (010) plane of monoclinic W 18 O 49 . The needle-like microstructure is a typical morphology of the W 18 O 49 phase usually formed at high temperature [14,15]. In our work, the hot Cu melt (N 1300 K) produced from the aluminothermic reaction may dissolve minor oxygen.…”

Experimental and theoretical investigation of enhanced cold cathode emission by plasma-etched 3d array of nanotips derived from CuPc nanotube

“…1 Electron eld emission or cold cathode emission is a direct consequence of quantum tunnelling in which electrons from an emitting cathode pass to the anode by overcoming surface potential barrier in the presence of an externally applied electric eld. 1 Electron eld emission or cold cathode emission is a direct consequence of quantum tunnelling in which electrons from an emitting cathode pass to the anode by overcoming surface potential barrier in the presence of an externally applied electric eld.…”