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New Findings from Tsinghua University in the Area of Nanoparticles Described (Coassembly of Janus Nanoparticles in Asymmetric Diblock Copolymer...

August 15, 2014



New Findings from Tsinghua University in the Area of Nanoparticles Described (Coassembly of Janus Nanoparticles in Asymmetric Diblock Copolymer Scaffolds: Unconventional Entropy Effect and Role of Interfacial Topology)

By a News Reporter-Staff News Editor at Science Letter -- Researchers detail new data in Nanoparticles. According to news reporting out of Beijing, People's Republic of China, by NewsRx editors, research stated, "The coassembly of Janus nanoparticles and block copolymers offers a unique approach to control the spatial organization of nanoparticles. Herein, using computer simulations and theoretical analysis, we explore the hierarchical structures and underlying mechanisms of the coassembly of symmetric Janus nanoparticles in asymmetric block copolymers."

Our news journalists obtained a quote from the research from Tsinghua University, "Our simulations constitute the first study clarifying that Janus nanoparticles with two symmetric surface moieties do not take symmetric distribution in the interfaces of asymmetric block copolymers. Rather, they take various but controllable off-center arrangements from the interfaces upon tailoring the molecular architectures of block copolymers and thereby controlling their resulted mesostructural topology. We examine the detailed mechanism of this mesostructural topology-mediated hierarchical assembly and find that the structural asymmetry of the block segments causes unconventional entropy effect at the molecular scale, and the curved interfaces can lead to topology mismatching between Janus nanoparticles and polymer interfaces at the mesoscale. Furthermore, we employ a micromechanical model to demonstrate that the deviation of the Janus nanoparticles from the interface can significantly influence the mechanical properties of the nanocomposites."

According to the news editors, the research concluded: "These findings enrich our understanding on the thermodynamic nature of polymer nanocomposites and may suggest a novel design approach to precisely program the spatial organization of nanoparticles in polymer matrix."

For more information on this research see: Coassembly of Janus Nanoparticles in Asymmetric Diblock Copolymer Scaffolds: Unconventional Entropy Effect and Role of Interfacial Topology. Macromolecules, 2014;47(13):4369-4379. 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 B.J. Dong, Tsinghua Univ, Dept. of Chem Engn, Key Lab Adv Mat MOE, Beijing 100084, People's Republic of China. Additional authors for this research include R.H. Guo and L.T. Yan (see also Nanoparticles).

Keywords for this news article include: Asia, Beijing, Nanocomposite, Nanotechnology, Emerging Technologies, People's Republic of China

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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