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Nogueira GM, Swiston AJ, Beppu MM, et al. Layer-by-layer deposited chitosan/silk fibroin thin films with anisotropic nanofiber alignment. Langmuir. 2010;26(11):8953-8doi: 10.1021/la904741h.
Nogueira, G. M., Swiston, A. J., Beppu, M. M., & Rubner, M. F. (2010). Layer-by-layer deposited chitosan/silk fibroin thin films with anisotropic nanofiber alignment. Langmuir : the ACS journal of surfaces and colloids, 26(11), 8953-8. https://doi.org/10.1021/la904741h
Nogueira, Grinia M, et al. "Layer-by-layer deposited chitosan/silk fibroin thin films with anisotropic nanofiber alignment." Langmuir : the ACS journal of surfaces and colloids vol. 26,11 (2010): 8953-8. doi: https://doi.org/10.1021/la904741h
Nogueira GM, Swiston AJ, Beppu MM, Rubner MF. Layer-by-layer deposited chitosan/silk fibroin thin films with anisotropic nanofiber alignment. Langmuir. 2010 Jun 01;26(11):8953-8. doi: 10.1021/la904741h. PMID: 20158176.
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Langmuir. 2010 Jun 01;26(11):8953-8. doi: 10.1021/la904741h.

Layer-by-layer deposited chitosan/silk fibroin thin films with anisotropic nanofiber alignment.

Langmuir : the ACS journal of surfaces and colloids

Grinia M Nogueira, Albert J Swiston, Marisa M Beppu, Michael F Rubner

Affiliations

  1. School of Chemical Engineering, University of Campinas, UNICAMP, P.O. Box 6066, 13083-970 Campinas-SP, Brazil.

PMID: 20158176 DOI: 10.1021/la904741h

Abstract

Chitosan/silk fibroin multilayer thin films were assembled using layer-by-layer deposition. The resultant multilayer films contained nanofibers aligned parallel to the dipping direction. Fiber deposition and orientation was enabled uniquely by a judicious choice of solvent and drying conditions and layer-by-layer assembly with chitosan. The deposition of oriented nanofibers was found to be the result of a unique combination of layer-by-layer and Langmuir-Blodgett type processing. Fiber orientation was confirmed by fast Fourier transform (FFT) analysis of optical micrographs and atomic force microscopy (AFM). Bidirectional fiber alignment was realized by rotating the substrate between multilayer deposition steps. Infrared spectroscopy revealed that the silk fibroin adopted the silk II secondary structure in the deposited films. We anticipate that these anisotropic films are able to combine the biocompatibility of a natural polymer system with the mechanical strength of SF, two properties useful in many biological applications including scaffolds suitable for guiding cell attachment and spreading.

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