In Situ observation of SnO2 nanoparticle formation in the gas phase

We propose an in situ experiment combining small and wide angle X-ray scattering (SAXS & WAXS) to probe the formation process of SnO2 nanoparticles (NPs) by chemical vapor synthesis (CVS) in the gas phase. Utilizing the high-brilliance of ESRF’s ID02 beamline, the formation process within highly diluted aerosols of NPs will be accessible from the first steps of nucleation and growth via agglomeration to the fully developed NP. This experiment on the model system SnO2-NP will widen our understanding of gas-phase based NP formation processes on the nanoscale in general and will find applications on other technological relevant nanoparticle systems.

本研究提出一项结合小角与广角X射线散射（small and wide angle X-ray scattering，SAXS & WAXS）的原位实验，用于探究气相条件下通过化学气相合成（chemical vapor synthesis，CVS）制备二氧化锡纳米颗粒（nanoparticles，NPs）的形成过程。借助欧洲同步辐射光源（European Synchrotron Radiation Facility，ESRF）ID02光束线的高亮度特性，本实验可实现对高稀释气溶胶中纳米颗粒完整形成过程的原位观测，覆盖从成核与生长、团聚直至形成成熟纳米颗粒的全部阶段。该项以二氧化锡纳米颗粒为模型体系的实验，将从整体上深化我们对纳米尺度气相纳米颗粒形成过程的认知，并可推广应用于其他具有技术应用价值的纳米颗粒体系。