In Situ and Ex Situ Studies of Platinum Nanocrystals: Growth and Evolution in Solution.
In situ studies on the growth and evolution of platinum nanocrystals in solution were carried out using synchrotron-based X-ray diffraction (XRD) techniques. Ex situ low- and high-resolution transmission electron microscopy (TEM) were used to investigate the nanocrystal morphologies through the diff...
| Publicado en: | Journal of the American Chemical Society Vol. 131; no. 40; pp. 14590 - 14596 |
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| Autores principales: | , , , , |
| Formato: | Artículo |
| Publicado: |
American Chemical Society
10/14/2009
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| Materias: | |
| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=hlh&AN=44750103&site=ehost-live header: @attributes: shortDbName: hlh uiTerm: 44750103 longDbName: Humanities International Complete uiTag: AN controlInfo: bkinfo: jinfo: jid: 00027863 ACS jtl: Journal of the American Chemical Society issn: 00027863 maglogo: N pubinfo: dt: 10/14/2009 vid: 131 iid: 40 pid: 997 pub: American Chemical Society artinfo: ui: 44750103 10.1021/ja9065688 ppf: 14590 ppct: 6 formats: tig: atl: In Situ and Ex Situ Studies of Platinum Nanocrystals: Growth and Evolution in Solution. aug: au: Soshan Cheong Watt, John lngham, Bridget Toney, Michael F. Tilley, Richard D. affil: School of Chemical and Physical Sciences, Victoria Universily of Wellington, Wellington 6012, New Zealand MacDiarmid Institute for Advanced Materials and Nanotechnology, Victoria Universily of Wellington, Wellington 6012, New Zealand Industrial Research Limited, P.O. Box 31-310, Lower Hutt 5040, New Zealand Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025 su: Platinum Nanocrystals Optical diffraction High resolution electron microscopy Porous materials sug: subj: Platinum Nanocrystals Optical diffraction High resolution electron microscopy Porous materials ab: In situ studies on the growth and evolution of platinum nanocrystals in solution were carried out using synchrotron-based X-ray diffraction (XRD) techniques. Ex situ low- and high-resolution transmission electron microscopy (TEM) were used to investigate the nanocrystal morphologies through the different growth stages. In a reaction with low precursor concentration, both XRD and TEM results show that growth occurs at a relatively slow rate and yields faceted morphologies, which are characteristic of a thermodynamically controlled regime. In contrast, the platinum nanocrystals in the high-concentration reaction form branched structures and grow at much greater rates under a kinetically controlled regime. Additionally the growth mechanism of the high-concentration reaction involves a morphology transformation from octapod-like shapes to porous nanostructures, which is brought about by a novel mechanism involving selective growth and etching processes that occur simultaneously and at comparable rates. pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: Y dt: @attributes: year: 2009 holdings: @attributes: islocal: N |
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