= user generated What's this?
This image provided by:
Zigzag zinc blende ZnS nanowires: Large scale synthesis and their structure evolution induced by electron irradiation
Kim, Daesoo; Shimpi, Paresh; Gao, Pu-XianJournal: Nano Research
Issue 12DOI: 10.1007/s12274-009-9099-3Published: 2009-12-01Institution(s):
University of Connecticut
Large scale zigzag zinc blende single crystal ZnS nanowires have been successfully synthesized during a vapor phase growth process together with a small yield of straight wurtzite single crystal ZnS nanowires. AuPd alloy nanoparticles were utilized to catalyze a vapor-solid-solid growth process of both types of ZnS nanowires, instead of the more common vapor-liquid-solid growth process. Surprisingly, the vapor-phase grown zigzag zinc blende ZnS nanowires are metastable under high-energy electron irradiation in a transmission electron microscope, with straight wurtzite nanowires being much more stable. Upon exposure to electron irradiation, a wurtzite ZnO nanoparticle layer formed on the zigzag zinc blende ZnS nanowire surface with concomitant displacement damage. Both electron inelastic scattering and surface oxidation as a result of electron-beam heating occur during this structure evolution process. When prolonged higher-voltage electron irradiation was applied, local zinc blende ZnS nanowire bodies evolved into ZnS-ZnO nanocables, and dispersed ZnS-ZnO nanoparticle networks. Random AuPd nanoparticles were observed distributed on zigzag ZnS nanowire surfaces, which might be responsible for a catalytic oxidation effect and speed up the surface oxidation-induced structure evolution.
This image is published with open access and made available for noncommercial purposes. For more information on what you are allowed to do with this image, please see the Creative Commons pages.
To request permissions to use any copyrighted material, please visit the source document.
Report a copyright concern regarding this image.
Log in or register to save your favorite images and download them as high-quality PowerPoint or PDF files.
Log in or register to save your search criteria.
© Springer 2013. Produced by Current Medicine Group Ltd, a part of Springer Science+Business Media.Remote Address: 188.8.131.52 Server: 18