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2015 ; 10
(12
): e0145756
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English Wikipedia
Gecko Adhesion on Wet and Dry Patterned Substrates
#MMPMID26696412
Stark AY
; Palecek AM
; Argenbright CW
; Bernard C
; Brennan AB
; Niewiarowski PH
; Dhinojwala A
PLoS One
2015[]; 10
(12
): e0145756
PMID26696412
show ga
Perhaps one of the most astounding characteristics of the gecko adhesive system
is its versatility. Geckos can locomote across complex substrates in a variety of
conditions with apparent ease. In contrast, many of our synthetic pressure
sensitive adhesives fail on substrates that are dirty, wet or rough. Although
many studies have investigated the effect of environmental challenges on
performance, the interaction of multiple, potentially compromising variables is
studied less often. Here we focus on substrate structure and surface water, both
of which are highly relevant to the biological system and to synthetic design. To
do this we utilized a highly controlled, patterned substrate (Sharklet®, by
Sharklet® Technologies Inc.). This allowed us to test independently and jointly
the effects of reduced surface area substrates, with a defined pattern, on
adhesion in both air and water. Our results show that adhesion is not
significantly impaired in air, whereas surface area and pattern significantly
affect adhesion in water. These findings highlight the need to study multiple
parameters that are relevant to the gecko adhesive system to further improve our
understanding of the biological system and to design better, more versatile
synthetics.