Vaishali Singh
Guru Gobind Singh Indraprastha University, India
Title: Studies of mesoporous silica nanoaprticles and sensing applications
Biography
Biography: Vaishali Singh
Abstract
Mesoporous silica nanoparticles with ordered pore diameters have been synthesized by soft template route. High surface area and pore sizes ranging between 2-50 nm make them effective humidity sensors. Doping of metal oxides in these nanoparticles further enchances sensing characterstics. Mesoporous silica have been doped with alkali metal halides, LiCl and KCl and it has been found that with increased concentration of the dopant, the resistance decreases. Mesoporous silica was taken as hard template for synthesizing porous crystalline transition metal oxide, Fe2O3 which has been further studied for its humidity sensing response. The samples were characterized using Fourier Transform Infra Red Spectroscopy (FTIR), Ultaviolet-Visible Spcetroscopy (UV-Vis), Small angle X-ray Scattering (SAXS), X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM). The surface area and pore size distribution of the as-synthesized materials has been determined from N2 adsorption-desorption isotherms.