Onset of Tethered Chain Overcrowding

William Y. Chen, Joseph X. Zheng, Stephen Z. D. Cheng, Christopher Y. Li, Ping Huang, Lei Zhu, Huiming Xiong, Qing Ge, Ya Guo, Rodric P. Quirk, Bernard Lotz, Lingfeng Deng, Chi Wu, and Edwin L. Thomas
Phys. Rev. Lett. 93, 028301 – Published 7 July 2004


We proposed an approach to precisely control the density of tethered chains on solid substrates using PEO-b-PS and PLLA-b-PS. As the crystallization temperature Tx increased, the PEO or PLLA lamellar crystal thickness dL increased as well as the reduced tethering density σ˜ of the PS chains. The onset of tethered PS chains overcrowding in solution occurs at σ˜*3.73.8 as evidenced by an abrupt change in the slope between (dL)1 and Tx. This results from the extra surface free energy created by the tethered chain that starts to affect the growth barrier of the crystalline blocks.

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  • Received 3 October 2003


©2004 American Physical Society

Authors & Affiliations

William Y. Chen1, Joseph X. Zheng1, Stephen Z. D. Cheng1,*, Christopher Y. Li2, Ping Huang1, Lei Zhu3, Huiming Xiong1, Qing Ge1, Ya Guo1, Rodric P. Quirk1, Bernard Lotz4, Lingfeng Deng5, Chi Wu5, and Edwin L. Thomas6

  • 1Maurice Morton Institute and Department of Polymer Science, The University of Akron, Akron, Ohio 44325-3909, USA
  • 2Department of Materials Science and Engineering, Drexel University, Philadelphia, Pennsylvania, 19104, USA
  • 3Polymer Program, Institute of Materials Science and Department of Chemical Engineering, The University of Connecticut, Storrs, Connecticut 06269-3136, USA
  • 4Institute of Charles Sadron, 6 Rue Boussingault, Strasbourg 67083, France
  • 5Departments of Physics and Chemistry, Hong Kong Chinese University, Sha Tin, Hong Kong
  • 6Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts, 02139, USA

  • *To whom correspondence should be addressed. Email address: scheng@uakron.edu

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Vol. 93, Iss. 2 — 9 July 2004

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Heating up of Superconductors
January 27, 2017

This collection marks the 30th anniversary of the discovery of high-temperature superconductors. The papers selected highlight some of the advances that have been made to date, both in understanding why these compounds behave in the way they do, and in utilizing them in applications. The papers included in the collection have been made free to read.

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