Document Detail

Large-scale fabrication of wafer-size colloidal crystals, macroporous polymers and nanocomposites by spin-coating.
MedLine Citation:
PMID:  15493937     Owner:  NLM     Status:  MEDLINE    
This paper reports a simple spin-coating technique for rapidly fabricating three types of technologically important materials--colloidal crystal, macroporous polymer, and polymeric nanocomposite, each with high crystalline qualities and wafer-scale sizes. Dispersion of monodisperse silica colloids in triacrylate monomers is spin-coated onto a variety of substrates. Shear-induced ordering and subsequent polymerization lead to the formation of three-dimensionally (3D) ordered colloidal crystals trapped inside a polymer matrix. The thickness of as-synthesized colloidal crystal-polymer nanocomposite is highly uniform and can be controlled simply by changing the spin speed and time. Selective removal of the polymer matrix and silica spheres lead to the formation of large-area colloidal crystals and macroporous polymers, respectively. The wafer-scale process is compatible with standard semiconductor microfabrication, as multiple micrometer-sized patterns can be created simultaneously for potential device applications. Normal-incidence transmission spectra in the visible and near-infrared regions show distinct peaks due to Bragg diffraction from 3D ordered structures. The spin-coating process opens a new route to the fundamental studies of shear-induced crystallization, melting and relaxation.
Peng Jiang; Michael J McFarland
Related Documents :
17269807 - Colloidal phase separation of concentrated pnipam solutions.
20585697 - Colloidal and optical stability of peg-capped and phospholipid-encapsulated semiconduct...
11497987 - Colloidal interactions in suspensions of rods.
15055957 - Colloidal titration of aqueous zirconium solutions with poly(vinyl sulfate) by potentio...
1880697 - Tantalum loaded silicone microspheres as particulate emboli.
16491497 - Oxidation chemistry of poly(ethylene glycol)-supported carbonylruthenium(ii) and dioxor...
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of the American Chemical Society     Volume:  126     ISSN:  0002-7863     ISO Abbreviation:  J. Am. Chem. Soc.     Publication Date:  2004 Oct 
Date Detail:
Created Date:  2004-10-20     Completed Date:  2004-11-23     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7503056     Medline TA:  J Am Chem Soc     Country:  United States    
Other Details:
Languages:  eng     Pagination:  13778-86     Citation Subset:  IM    
Copyright Information:
Copyright 2004 American Chemical Society
Corning Science and Technology, Corning Incorporated, Corning, New York 14831, USA.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Colloids / chemical synthesis*,  chemistry
Fourier Analysis
Microscopy, Electron, Scanning
Nanostructures / chemistry*
Polymers / chemical synthesis*,  chemistry
Reg. No./Substance:
0/Colloids; 0/Polymers; 0/Suspensions

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  High-resolution 31p field cycling NMR as a probe of phospholipid dynamics.
Next Document:  Dopant ion size and electronic structure effects on transparent conducting oxides. Sc-doped CdO thin...