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Data on Macromolecular Research Reported by Researchers at University of Chicago (Alignment and Structural Evolution of Cylinder-Forming Diblock...

August 15, 2014



Data on Macromolecular Research Reported by Researchers at University of Chicago (Alignment and Structural Evolution of Cylinder-Forming Diblock Copolymer Thin Films in Patterned Tapered-Width Nanochannels)

By a News Reporter-Staff News Editor at Science Letter -- A new study on Macromolecular Research is now available. According to news reporting out of Chicago, Illinois, by NewsRx editors, research stated, "Control over the orientation of cylindrical block copolymer microdomains and the position of dislocations using tapered nanochannels is herein demonstrated. Dislocations are introduced periodically as the channels become progressively wider."

Our news journalists obtained a quote from the research from the University of Chicago, "Our high-temperature atomic force microscopy (AFM) enables us to probe real-time and real-space dislocation movement directly. Upon annealing, dislocations are observed to move to their equilibrium positions, where the average free energy of the polymer chains reaches a minimum. Smaller confinement widths impose a powerful guiding field for templating domain alignment, as the deviations of the dislocations at the narrower end of the channel from their equilibrium positions are minimal. Finally, the fluctuations of dislocations across the wedge are studied under different temperatures, and the perpendicular diffusion coefficients and activation energy are determined. These experiments demonstrate the ability to control the placement of periodically located dislocations along tapered nanochannels, offering an efficacious route to placing defects at predetermined locations in such hierarchically assembled nanostructures."

According to the news editors, the research concluded: "This also suggests the possibility of transporting and concentrating defect-seeking species such as nanoparticle additives into intentionally selected locations along the tapered channel."

For more information on this research see: Alignment and Structural Evolution of Cylinder-Forming Diblock Copolymer Thin Films in Patterned Tapered-Width Nanochannels. Macromolecules, 2014;47(13):4236-4242. Macromolecules can be contacted at: Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA. (American Chemical Society - www.acs.org; Macromolecules - www.pubs.acs.org/journal/mamobx)

Our news journalists report that additional information may be obtained by contacting Q.Q. Tong, University Chicago, Dept. of Chem, Chicago, IL 60637, United States. Additional authors for this research include Q. Zheng and S.J. Sibener (see also Macromolecular Research).

Keywords for this news article include: Chicago, Illinois, United States, Macromolecular Research, North and Central America

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Science Letter


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