Hierarchical silver indium tungsten oxide mesocrystals with morphology-, pressure-, and temperature-dependent luminescence properties

Abstract

Highly hierarchical structures of silver indium tungsten oxide (AgIn(WO 4 ) 2 ) mesocrystals can be rationally fabricated via the microwave-assisted synthesis method by tuning the initial concentrations of the precursors. Photoluminescence spectra of hierarchical AgIn(WO 4 ) 2 mesocrystals were measured to investigate the correlation between the morphology, pressure, and temperature and their luminescence properties. The materials showed interesting white emission when excited by visible light of wavelength 460 nm. AgIn(WO 4 ) 2 materials having different morphologies displayed notable differences in photogenerated emission performance. The emission was strongly correlated with the surface nanostructures of outgrowths, with larger amounts of outgrowths leading to stronger emission intensities. The pressure-and temperature-dependent photoluminescence properties of these materials have also been investigated under hydrostatic pressures up to 16 GPa at room temperature and in the temperature range from 10 to 300 K.

Metal oxide mesocrystals with tailored structures and properties for energy conversion and storage applications

“…Hu et al 84 demonstrated that AgIn(WO 4 ) 2 MCs exhibit a white emission in the visible region when excited by 460-nm light. Their photoluminescence (PL) strongly correlated with the surface nanostructures of outgrowths; a larger amount of outgrowths led to stronger emission intensities.…”

In2O3 microbundles constructed with well-aligned single-crystalline nanorods: F127-directed self-assembly and enhanced gas sensing performance

“…To date, the integration of 1D nanounits into hierarchical structures is of special interest due to their peculiar properties and functional applications [5]. The synthetic strategies have involved the use of hydrothermal/solvothermal reaction [6,7], soft/hard template [8][9][10], structure-directing agent [11], and microwave radiation [12]. Among the many routes to self-assembled hierarchical structures, template-directed synthesis with soft templates, such as microemulsion [13], micelles [14], and gas bubbles [15], has been demonstrated an effective approach.…”

In situ Transmission Electron Microscopy observation of Ag nanocrystal evolution by surfactant free electron-driven synthesis

“…All these effects should be taken into account in order to understand the process characteristics in TEM. Owing to its potential applications in optical fibers, photocatalytic materials, and sensors, α-Ag 2 WO 4 has attracted considerable research and development attention 18 19 20 21 22 23 24 25 26 27 28 29 30 31 . By exposure to the electron beam of an electron microscope, the α-Ag 2 WO 4 undergoes in situ nucleation of Ag filaments on the crystal surface 16 17 32 , and the presence of these Ag nanoparticles leads to unique optical 33 and microbial properties 34 .…”