Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 363, Issue 1, Pages 206-212Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2011.07.045
Keywords
Cellulose nanocrystals; Dielectrophoresis; Ultrathin films; Electric field; Shear assembly
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Funding
- NCSU
- National Research Initiative of the USDA Cooperative State Research, Education and Extension Service [2005-35504-16145, 2007-35504-18290]
- Fidipro's LignoCell Project
- University of West Hungary [4.2.1.13-09/1/KONV-2010-0006]
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Ultrathin films of cellulose nanocrystals (CNCs) are obtained by using a convective assembly setup coupled with a low-strength external AC electric field. The orientation and degree of alignment of the rodlike nanoparticles are controlled by the applied field strength and frequency used during film formation. Calculated dipole moments and Clausius-Mossotti factors allowed the determination of the critical frequencies, the peak dielectrophoresis as well as the principal orientation of the CNCs in the ultrathin films. As a result of the combination of shear forces and low electric field highly ultrathin films with controlled, unprecedented CNC alignment are achieved. (C) 2011 Elsevier Inc. All rights reserved.
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