α-MoO3/TiO2 core/shell nanorods: Controlled-synthesis and low-temperature gas sensing properties

Quasi-one-dimensional metal-oxide-based heterostructural gas-sensing materials: A review

“…Much more efforts are required to clarify the sophisticated gas-sensing mechanisms. (a) nanocrystals decorated nanowire (type I) [41], (b) brush-like nanostructure (type II) [79], (c) core/shell nanowire(type III) [84], (d) core/shell nanotube (type IV) [48]. M a n u s c r i p t M a n u s c r i p t p-Cr 2 O 3 NPs-functionalized n-SnO 2 NWs were exposed to various reducing gases, such as H 2 , CO, C 7 H 8 , and C 6 H 6 at 300°C.…”

“…The key structural parameters to determine the gas-sensing properties are the amount of activated adsorption sites [120,121], the gas-diffusion ability [53,122], and the modulation of conduction A c c e p t e d M a n u s c r i p t channel [42,84].…”

“…A simplest, yet very useful method is to confine the radial scale within the critical dimensions commiserating with the Debye length of the oxide [134]. Chen et al [84] have fabricated the α-MoO 3 /TiO 2 core/shell nanorods with shell thickness close to its Debye length. In this case, oxygen molecules in air not only deplete completely electrons in bulk of the shell material, but also can further extract electrons in the core material, resulting in very high resistance of the nanocomposites in air.…”

“…[45], α-MoO 3 /TiO 2 core/shell nanorod [84], Ga 2 O 3 /ZnO core/shell nanorod [145], and Fe 2 O 3 /TiO 2 core/shell nanotube [48].…”

Hydrogen sensing properties of multiple networked Nb2O5/ZnO core–shell nanorod sensors

“…Core-shell nanostructures are used widely to enhance the gas sensing performance of 1D nanostructure sensors [17][18][19]. This paper reports the synthesis of Nb 2 O 5 -core/ZnO-shell nanorods by the thermal oxidation of niobium followed by the atomic layer deposition (ALD) of ZnO, as well as the sensing properties of the core-shell nanorods toward hydrogen gas.…”