By a News Reporter-Staff News Editor at Science Letter -- Investigators discuss new findings in Macromolecular Research. According to news reporting originating from Beijing, People's Republic of China, by NewsRx correspondents, research stated, "A reversible transformation of overall shape and internal structure as well as surface composition of nanostructured block copolymer particles is demonstrated by solvent-adsorption annealing. Polystyrene-b-poly(4-vinylpyridine) (PS-b-P4VP) pupa-like particles with PS and P4VP lamellar domains alternatively stacked can be obtained by self-assembly of the block copolymer under 3D soft confinement."
Our news editors obtained a quote from the research from the Institute of Chemistry, "Chloroform, a good solvent for both blocks, is selected to swell and anneal the pupa-like particles suspended in aqueous media. Reversible transformation between pupa-like and onion-like structures of the particles can be readily tuned by simply adjusting the particle/aqueous solution interfacial property. Interestingly, poly(vinyl alcohol) (PVA) concentration in the aqueous media plays a critical role in determining the particle morphology. High level of PVA concentration is favorable for pupa-like morphology, while extremely low concentration of PVA is favorable for the formation of onion-like particles. Moreover, the stimuli-response behavior of the particles can be highly suppressed through selective growth of Au nanoparticles within the P4VP domains."
According to the news editors, the research concluded: "This strategy provides a new concept for the reversible transformation of nanostructured polymer particles, which will find potential applications in the field of sensing, detection, optical devices, drug delivery, and smart materials fabrication."
For more information on this research see: Reversible Transformation of Nanostructured Polymer Particles. Macromolecules, 2013;46(17):7012-7017. 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)
The news editors report that additional information may be obtained by contacting R.H. Deng, Chinese Academy Sci, Inst Chem, State Key Lab Polymer Phys & Chem, Beijing 100190, People's Republic of China. Additional authors for this research include F.X. Liang, W.K. Li, Z.Z. Yang and J.T. Zhu (see also Macromolecular Research).
Keywords for this news article include: Asia, Beijing, Macromolecular Research, People's Republic of China
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