Unveiling low-temperature thermal oxidation growth of W₁₈O₄₉ nanowires with metastable β-W films

Abstract

With features of innate tunnels and oxygen vacancies derived from unique geometrical structure and sub-stoichiometric compositions, W18O49 nanowires have been explored as multifunctional materials with diverse applications. Though thermal oxidization...

Voltage driven chemiresistor with ultralow power consumption based on self-heating bridged WO3 nanowires

“…External heating enhances the charge exchange between the analyte gas molecules and MOS and offers sufficient activation energy until the optimal operation temperature is reached. [8][9][10] However, most of the MOS chemiresistors operate at a high temperature of 100-300 °C, 11 suffer from the aggregation of nanoparticles, and result in the instability of the chemiresistors. 2 The high operation temperature also limits its mobile and wireless applications.…”

Prompt Electronic Discrimination of Gas Molecules by Self-Heating Temperature Modulation

“…Rational design of self-heated MOS chemiresistors with both high response (large specific surface area) and high thermal stability (stable heating filament) is a prerequisite for achieving the aforementioned proposal. In this work, oblique angle deposition (OAD) via radio frequency (RF) sputtering was employed to design a porous nanocolumnar MOS film-based sensing layer with both high density of surface active sites and robust thermal stability. − WO 3 , featured by structural diversity and diverse substoichiometric oxides with rich oxygen vacancy defects, has shown outstanding gas sensing performances toward multiple inorganic gases and VOCs. , The high melting temperature of W (3410 °C, higher than In, Sn, Zn, and Ti) also benefits for achieving highly porous nanocolumnars by affecting the size and density of OAD initial nuclei . Herein, the WO 3 nanocolumnar nanorod film was deposited onto a glass substrate with indium–tin oxide (ITO) interdigital electrodes (IDEs) to obtain a chemiresistor device.…”

“…27−30 WO 3 , featured by structural diversity and diverse substoichiometric oxides with rich oxygen vacancy defects, has shown outstanding gas sensing performances toward multiple inorganic gases and VOCs. 31,32 The high melting temperature of W (3410 °C, higher than In, Sn, Zn, and Ti) also benefits for achieving highly porous nanocolumnars by affecting the size and density of OAD initial nuclei. 24 Herein, the WO 3 nanocolumnar nanorod film was deposited onto a glass substrate with indium−tin oxide (ITO) interdigital electrodes (IDEs) to obtain a chemiresistor device.…”