SEM ELISA Kit

ZnO thin films were synthesized from precursors of different concentrations via aerosol assisted chemical vapour deposition (AACVD) on glass substrates at 400 degrees C and were sintered in vacuum at 500 degrees C. The effect of the precursor concentration and vacuum sintering on the film growth and optoelectronic properties was investigated. With the precursor concentration increasing, the films grew preferentially along the (002) plane at 0.1 M pre-cursor and then became fully polycrystalline. From images of scanning electron microscopy (SEM), it can be observed that the grain size became larger but simultaneously the particles were physically separate. The lowest electrical resistivity (6.38 Omega cm) was gained at films of (002) preferred orientation and the optical transparency in the visible light range was as high as 82.5%. After sintering, the resistivity of both 0.05 and 0.1 M thin films decreased to 19.04 and 2.28 Omega cm, respectively whist the transparency almost remained unchanged. The improvement of electrical property could be attributed to the better crystallinity and the enlarged grain size, which significantly reduced the scattering of grain boundaries to free electrons.

Physical characteristics and quantitative elemental composition of PM and residual ash produced from sugarcane leaves (SCL) combustion were investigated using TEM-EDS compared with forest leaves (FRL). SEM-EDS was used to analyze the microstructure and chemical composition of biomass raw leaves and PM. XRD analysis was also performed to investigate the characterization of the crystalline nanostructure, structure of PM, and residual ash compared to the TEM image processing method. The oxidation kinetics of biomass raw ma-terials, PM, and residual ash were investigated by TGA. The morphology of fine and ultrafine agglomerate structure of SCL soot and residual ash are not significantly different from the FRL soot and residual ash. The average diameter sizes of single primary nanoparticles of SCL and FRL soot are approximately 37 nm and 35 nm, while the sizes of residual ash are about 18 nm and 22 nm, respectively. The single primary nanoparticles of soot are mainly com-posed of curve line crystallites of carbon fringes, while residual ash is composed of straightline lattice fringes. The average fringe lengths of SCL and FRL soot are about 1.25 nm and 1.04 nm from the outer shell and 0.89 nm and 0.74 nm from the inner core. The interlayer spacing of curve line carbon fringes of SCL and FRL soot is approximately 0.359 nm and 0.362 nm by the TEM image analysis and it was matched with XRD analysis. The biomass PMs are mainly composed of soot, Si, Ca, and K compounds: SiO2, CaCO3, and KCl. (C) 2020 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.