Determining Adhesion of Non-Uniform Arrays of Fibrils

Resource type
Date created
2012-08-10
Authors/Contributors
Author: Zhang, Cheng
Author: Sameoto, Dan
Author: Zhang, Xin
Author: Li, Yasong
Author: Ng, Him Wai
Author: Menon, Carlo
Abstract
Dry adhesives containing nonuniform arrays of fibrils were tested for the uniformity of their adhesion strength. These arrays comprised fibrils with nanometer-scale dimensions and lengths tuned from 150 to 1500 nm. The surfaces of the fibrils were rendered hydrophobic through a vapor phase deposition of silane molecules to further tune the adhesion strength of the fibrillar structure. Adhesion force measurements over micrometer-length scales were obtained using a tipless cantilever controlled by a scanning probe microscope. Maps of the adhesion forces depicted diverse variations in adhesion strength with the nonuniform lateral changes in topography. Through an extensive data analysis, differences observed between samples were correlated to changes in processing conditions and surface chemistry modifications. The methods demonstrated in this paper are useful for identifying variations in the adhesion strength of dry adhesives made of nonuniform arrays of fibrils. These advancements are crucial for understanding the correlation between structure and function within nonuniform fibrillar adhesives.
Document
Published as
"Determining Adhesion of Non-Uniform Arrays of Fibrils," Zhang, C.; Zhou J. H.-W.; Sameoto, D.; Zhang, X.; Li, Y.; Ng, H. W.; Menon, C.; Gates, B. D.,* J. Adhesion Sci. Technol., 2014, 28 (3-4), 320-336. (invited manuscript). DOI: 10.1080/01694243.2012.691810.
Publication title
Adhesion Sci. Technol.
Document title
Determining Adhesion of Non-Uniform Arrays of Fibrils
Date
2014
Volume
28
Issue
3-4
First page
320
Last page
336
Publisher DOI
10.1080/01694243.2012.691810
Copyright statement
Copyright is held by the author(s).
Scholarly level
Peer reviewed?
Yes
Language
Member of collection