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Please use this identifier to cite or link to this item: http://hdl.handle.net/1860/1236

Title: Onset of tethered chain overcrowding
Authors: Chen, William Y.
Zheng, Joseph X.
Cheng, Stephen Z. D.
Li, Christopher Y.
Huang, Ping
Zhu, Lei
Xiong, Huiming
Ge, Qing
Guo, Ya
Quirk, Rodric P.
Lotz, Bernard
Deng, Lingfeng
Wu, Chi
Thomas, Edwin L.
Keywords: Grafted Polymer Brush;Surface Interactions;Molecular-Dynamics;Crystallization;Polystyrene;Simulation;Decoration;Crystals;Solvents;Layers
Issue Date: 9-Jul-2004
Publisher: The American Physical Society
Citation: Physical Review Letters, 93(2): pp. 028301-1 -- 028301-4. Retrieved September 19, 2006 from http://www.materials.drexel.edu/SRG/chrisli.html. DOI: http://dx.doi.org/10.1103/PhysRevLett.93.028301
Abstract: 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 T-x increased, the PEO or PLLA lamellar crystal thickness d(L) increased as well as the reduced tethering density (σ) over tilde of the PS chains. The onset of tethered PS chains overcrowding in solution occurs at (σ) over tilde*similar to3.7-3.8 as evidenced by an abrupt change in the slope between (d(L))(-1) and T-x. This results from the extra surface free energy created by the tethered chain that starts to affect the growth barrier of the crystalline blocks.
URI: http://hdl.handle.net/1860/1236
Appears in Collections:Faculty Research and Publications (MSE)

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