Dip-and-drag lateral force spectroscopy for measuring adhesive forces between nano-fibers

Dolan, Grace K., Yakubov, Gleb E., Greene, George W., Amiralian, Nasim, Annamalai, Pratheep K., Martin, Darren J. and Stokes, Jason R. (2016) Dip-and-drag lateral force spectroscopy for measuring adhesive forces between nano-fibers. Langmuir, 32 50: 13340-13348. doi:10.1021/acs.langmuir.6b03467

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Author Dolan, Grace K.
Yakubov, Gleb E.
Greene, George W.
Amiralian, Nasim
Annamalai, Pratheep K.
Martin, Darren J.
Stokes, Jason R.
Title Dip-and-drag lateral force spectroscopy for measuring adhesive forces between nano-fibers
Journal name Langmuir   Check publisher's open access policy
ISSN 0743-7463
Publication date 2016-11-22
Year available 2016
Sub-type Article (original research)
DOI 10.1021/acs.langmuir.6b03467
Open Access Status Not yet assessed
Volume 32
Issue 50
Start page 13340
End page 13348
Total pages 16
Place of publication Washington, DC, United States
Publisher American Chemical Society
Language eng
Abstract Adhesive interactions between nano-fibers strongly influence the mechanical behavior of soft materials comprised of fibrous networks. We use atomic force microscopy (AFM) in lateral force mode to drag a cantilever tip through fibrous networks, and use the measured lateral force response to determine the adhesive forces between fibers of the order of 100 nm diameter. The peaks in lateral force curves are directly related to the detachment energy between two fibers; the data is analyzed using the Jarzynski equality to yield the average adhesion energy of the weakest links. The method is successfully used to measure adhesion forces arising from van der Waals interactions between electrospun polymer fibers in networks of varying density. This approach overcomes the need to isolate and handle individual fibers, and can be readily employed in the design and evaluation of advanced materials and biomaterials which, through inspiration from nature, are increasingly incorporating nano-fibers. The data obtained with this technique may also be of critical importance in the development of network models capable of predicting the mechanics of fibrous materials.
Keyword Atomic Force Microscopy
Lateral Force Microscopy
Jarzynski equality
Force Spectroscopy
Q-Index Code C1
Q-Index Status Provisional Code
Grant ID DP150104147
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
HERDC Pre-Audit
Australian Institute for Bioengineering and Nanotechnology Publications
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Created: Thu, 24 Nov 2016, 09:35:33 EST by Gleb Yakubov on behalf of School of Chemical Engineering