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|a E 1.99:1876383
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|a Solvent-Free Synthesis of Janus Colloidal Particles
|h [electronic resource]
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|a Washington, D.C. :
|b United States. Department of Energy. Office of Science ;
|a Oak Ridge, Tenn. :
|b Distributed by the Office of Scientific and Technical Information, U.S. Department of Energy,
|c 2008.
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| 300 |
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|a Size: p. 10073-10077 :
|b digital, PDF file.
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|a text
|b txt
|2 rdacontent.
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|a online resource
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|a Published through Scitech Connect.
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|a 08/21/2008.
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|a "Journal ID: ISSN 0743-7463."
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|a Jiang, Shan ; Schultz, Mitchell J. ; Chen, Qian ; Moore, Jeffrey S. ; Granick, Steve ;
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|a Univ. of Illinois at Urbana-Champaign, IL (United States)
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|a Taking advantage of the quick and efficient access of vapor to surfaces, a simple, solvent-free method is demonstrated to synthesize Janus colloidal particles in large quantity and with high efficiency. First, at the liquid?liquid interface of emulsified molten wax and water, untreated silica particles adsorb and are frozen in place when the wax solidifies. The exposed surfaces of the immobilized particles are modified chemically by exposure to silane vapor and, in principle, subsequent dissolution of the wax opens up the inner particle surface for further chemical modification. Applying this scheme, this paper describes the production of amphiphilic Janus particles (hydrophobic on one side, hydrophilic on the other) and dipolar Janus particles (positively charged on one side, negatively charged on the other). Janus geometry is confirmed by fluorescence microscopy and flow cytometry. As a result, amphiphilic Janus particles are found to adsorb strongly to the water?oil interface, whereas dipolar particles assemble into chains in the aqueous phase.
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|b FG02-07ER46471.
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|a 37 inorganic, organic, physical, and analytical chemistry
|2 local.
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|a Chemical modification
|2 local.
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|a Colloidal particles
|2 local.
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|a Deposition
|2 local.
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|a Fluorescence
|2 local.
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|a Nanoparticles
|2 local.
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| 650 |
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|a Inorganic, organic, physical, and analytical chemistry
|2 local.
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|a United States.
|b Department of Energy.
|b Office of Science.
|4 spn.
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|a United States.
|b Department of Energy.
|b Chicago Operations Office.
|f res.
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|a United States.
|b Department of Energy.
|b Office of Scientific and Technical Information
|4 dst.
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|u https://www.osti.gov/servlets/purl/1876383
|z Full Text (via OSTI)
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|a .b127407698
|b 02-28-23
|c 07-29-22
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|a web
|b 12-08-22
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|s 22888c9f-a1a5-5c94-b4dc-9a3f53222045
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|p Can circulate
|a University of Colorado Boulder
|b Online
|c Online
|d Online
|e E 1.99:1876383
|h Superintendent of Documents classification
|i web
|n 1
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