While galvanic exchange is commonly applied to metallic nanoparticles, recently its applicability was expanded to metal-oxides. Here the galvanic exchange is studied in metal/metal-oxide core/shell nanocrystals. In particular Sn/SnO2 is treated by Ag+, Pt2+, Pt4+, and Pd2+. The conversion dynamics is monitored by in situ synchrotron X-ray diffraction. The Ag+ treatment converts the Sn cores to ...

Two different series of H2 sensors were prepared. The first series was based on n-type semiconducting SnO2 thin films, prepared by the sol–gel method. The effect of Au and Pt nanoparticles in SnO2 was investigated for gas sensor applications. The second series was based on p-type NiO thin films, which were grown by pulsed laser deposition on microscope glass or (100) Si substrates. The effect o...

Miniaturized electronic noses to rapidly detect and differentiate trace amount of chemical agents are extremely attractive. Use of tin oxide nanoparticles as sensing elements has been proved to significantly improve both the response time and the sensitivity of gas sensors or electronic noses. In this paper, we report the synthesis of pure tin oxide nanoparticles using a simple, convenient, and...

The present review on some metal oxide nanoparticles used for pressure sensor, various metal oxide containing such as (SnO2, ZnO, Al2O3, WO3, Fe2O3, Ga2O3, TiO2 and SiC, ...etc.) responds detection pressure measure in kbar unit through oxygen activity as oxidation or reduction process of an integrated in devices sensor (MEMS, CMOS, MOX and MOXQ1D...etc.) that devices measuring of pressure as st...

A rapid, wafer-level, dry process for in-situ synthesis, deposition of stable nanostructured, porous metal-oxide films for gas sensors is presented. Lace-like, nanostructured films of pure SnO2 featuring high porosity (98%) are selfassembled on a target substrate by flame spray pyrolysis (FSP). The nanoparticles are mainly polyhedral and monocrystalline with a grain size of 8.7 nm and crystal s...

State Key Laboratory of Silicon Materials, K Application for Batteries of Zhejiang Provin Engineering, Zhejiang University, Hangzhou edu.cn; Fax: +86 571 87951152; Tel: +86 57 Department of Chemical and Biomolecula College Park, MD 20742, USA. E-mail: cswa † Electronic supplementary information (TGA) prole of the SnO2@C porous com porous composite aer being ultrasoni galvanostatic charge–disc...

Metal complexes might become a new type of promising gene delivery systems because of their low cytotoxicity, structural diversity, controllable aqua- and lipo-solubility, and appropriate density and distribution of positive charges. In this study, Zn2+ complexes (1-10) formed with a series of ligands contained benzimidazole(bzim)were prepared and characterized. They were observed to have diffe...

Fe-doped La0.77Sr0.23Mn1 - y Fe y O3 nanoparticles have been synthesized by sol-gel method, and ceramic samples based on them were sintered at 1613 K. Crystallographic and magnetic properties of obtained nanoparticles and ceramic samples have been studied. It has been established that cell volume for nanoparticles increases with growing of iron content, while this dependence displays an opposit...

Nano-adsorbents are emerging as potential candidates for the treatment of toxic organic pollutants. In this context, spherical SnO2 nanoparticles (NPs) synthesized through a facile hydrothermal method without usage...

Reducing the working temperature and increasing sensitivity selectivity has always been a research hotspot in field of MOS based gas sensors. In this work, improved triethylamine (TEA) sensing performance mechanism SnO2 by doping Pd have investigated. nanoparticles Pd-SnO2 with different amounts (0%, 0.1%, 0.3%, 0.5%, 0.7%) were successfully prepared hydrothermal method. The size is very unifor...