In situ Transmission Electron Microscopy of Solid–Liquid Phase Transition of Silica Encapsulated Bismuth NanoparticlesNanoscale
AbstractThe solid–liquid phase transition of silica encapsulated bismuth nanoparticles was studied by in situ transmission electron microscopy (TEM). The nanoparticles were prepared by a two-step chemical synthesis process involving thermal decomposition of organometallic precursors for nucleating bismuth and a sol–gel process for growing silica. The microstructural and chemical analyses of the nanoparticles were performed using high-resolution TEM, Z-contrast imaging, focused ion beam milling, and X-ray energy dispersive spectroscopy. Solid–liquid–solid phase transitions of the nanoparticles were directly recorded by electron diffractions and TEM images. The silica encapsulation of the nanoparticles prevented agglomeration and allowed particles to preserve their original volume upon melting, which is desirable for applications of phase changenanoparticles with consistently repeatable thermal properties.
CopyrightCopyright © 2011, Royal Society of Chemistry
PublisherRoyal Society of Chemistry
Citation InformationJianjun Hu, Yan Hong, Christopher Muratore, Ming Su, et al.. "In situ Transmission Electron Microscopy of Solid–Liquid Phase Transition of Silica Encapsulated Bismuth Nanoparticles" Nanoscale Vol. 3 (2011)
Available at: http://works.bepress.com/christopher-muratore/9/