Bioinspired structure adhesives have received increasing interest for many applications, such as climbing robots and medical devices. Inspired by the closely packed keratin nanopillars on the toe pads of tree frogs, tightly arranged polycaprolactone nanorod arrays are prepared by mold process and chemical modification. Nanorod arrays show enhanced adhesion and friction on both smooth and rough surfaces compared to the arrays with hexagonal micropillars. The bonding of nanorods results in a larger stiffness of the nanorod surface, contributing mainly to friction rather than adhesion. The results suggest the function of closely packed keratin nanopillars on the toe pad of tree frogs and offer a guiding principle for the designing of new structured adhesives with strong attaching abilities.
Topics
Friction,
Adhesion,
Polymers,
Micropillar array,
Nanomaterials,
Nanorods,
Surface science,
Bionics
REFERENCES
1.
K.
Autumn
, Y. A.
Liang
, S. T.
Hsieh
, W.
Zesch
, W. P.
Chan
, T. W.
Kenny
, R.
Fearing
, and R. J.
Full
, Nature
405
, 681
(2000
). 2.
V. V.
Ernst
, Tissue Cell
5
, 97
(1973
). 3.
L.
Qu
, L.
Dai
, M.
Stone
, Z.
Xia
, and Z. L.
Wang
, Science
322
, 238
(2008
). 4.
M. P.
Murphy
, B.
Aksak
, and M.
Sitti
, Small
5
, 170
(2009
). 5.
J. K. A.
Langowski
, D.
Dodou
, P.
Van Assenbergh
, and J. L.
Van Leeuwen
, Integr. Comp. Biol.
60
, 906
(2020
). 6.
K.
Jin
, J. C.
Cremaldi
, J. S.
Erickson
, Y.
Tian
, J. N.
Israelachvili
, and N. S.
Pesika
, Adv. Funct. Mater.
24
, 574
(2014
). 7.
D.
Tan
, Y.
Zheng
, and L.
Xue
, “The role of effective elastic modulus in the performance of structured adhesives
,” in Bio-inspired Structured Adhesives
, edited by L.
Heepe
, L.
Xue
, and S. N.
Gorb
(Springer International Publishing
, Cham
, 2017
), pp. 107
–139
.8.
J. K. A.
Langowski
, D.
Dodou
, M.
Kamperman
, and J. L.
Van Leeuwen
, Front. Zoology
15
, 32
(2018
). 9.
X.
Wang
, D.
Tan
, X.
Zhang
, Y.
Lei
, and L.
Xue
, Biomimetics
2
, 10
(2017
). 10.
J. K. A.
Langowski
, H.
Schipper
, A.
Blij
, F. T.
Van Den Berg
, S. W. S.
Gussekloo
, and J. L.
Van Leeuwen
, J. Anat.
233
, 478
(2018
). 11.
Q.
Liu
et al, Small
17
, 2005493
(2021
). 12.
L. F.
Boesel
, C.
Greiner
, E.
Arzt
, and A.
del Campo
, Adv. Mater.
22
, 2125
(2010
). 13.
D.
Tan
, X.
Wang
, Q.
Liu
, K.
Shi
, B.
Yang
, S.
Liu
, Z.-S.
Wu
, and L.
Xue
, Small
15
, 1904248
(2019
). 14.
X.
Wang
et al, ACS Appl. Mater. Interfaces
11
, 46337
(2019
). 15.
F.
Meng
, Q.
Liu
, X.
Wang
, D.
Tan
, L.
Xue
, and W. J. P.
Barnes
, Philos. Trans. R. Soc. A
377
, 20190131
(2019
). 16.
J. M.
Smith
, W. J. P.
Barnes
, J. R.
Downie
, and G. D.
Ruxton
, J. Comp. Physiol. A
192
, 1193
(2006
). 17.
T.
Endlein
, A.
Ji
, S.
Yuan
, I.
Hill
, H.
Wang
, W. J. P.
Barnes
, Z.
Dai
, and M.
Sitti
, Proc. R. Soc. B
284
, 20162867
(2017
). 18.
W.
Federle
, W. J. P.
Barnes
, W.
Baumgartner
, P.
Drechsler
, and J. M.
Smith
, J. R. Soc. Interface
3
, 689
(2006
). 19.
D. M.
Drotlef
, E.
Appel
, H.
Peisker
, K.
Dening
, A.
Del Campo
, S. N.
Gorb
, and W. J.
Barnes
, Interface Focus
5
, 20140036
(2015
). 20.
L.
Xue
et al, ACS Nano
11
, 9711
(2017
). 21.
M.
Nakano
and T.
Saino
, J. Morphol.
277
, 1509
(2016
). 22.
H.
Chen
, L.
Zhang
, D.
Zhang
, P.
Zhang
, and Z.
Han
, ACS Appl. Mater. Interfaces
7
, 13987
(2015
). 23.
R.
Gupta
and J.
Fréchette
, Langmuir
28
, 14703
(2012
). 24.
J.
Iturri
, L.
Xue
, M.
Kappl
, L.
García-Fernández
, W. J. P.
Barnes
, H.-J.
Butt
, and A.
del Campo
, Adv. Funct. Mater.
25
, 1499
(2015
). 25.
L.
Zhang
, H.
Chen
, Y.
Guo
, Y.
Wang
, Y.
Jiang
, D.
Zhang
, L.
Ma
, J.
Luo
, and L.
Jiang
, Adv. Sci.
7
2001125
(2020
). 26.
Q.
Liu
et al, ACS Appl. Mater. Interfaces
12
, 19116
(2020
). 27.
A.
Tsipenyuk
and M.
Varenberg
, J. R. Soc. Interface
11
, 20140113
(2014
). 28.
H.
Ko
, M.
Seong
, and H. E.
Jeong
, Soft Matter
13
, 8419
(2017
). 29.
C.
Dhong
and J.
Fréchette
, Soft Matter
11
, 1901
(2015
). 30.
L.
Pang
, N. C.
Paxton
, J.
Ren
, F.
Liu
, H.
Zhan
, M. A.
Woodruff
, A.
Bo
, and Y.
Gu
, ACS Appl. Mater. Interfaces
12
, 47993
(2020
). 31.
H.
Masuda
, K.
Yada
, and A.
Osaka
, Jpn. J. Appl. Phys.
37
, L1340
(1998
). 32.
W.
Cheng
, X.
Zeng
, H.
Chen
, Z.
Li
, W.
Zeng
, L.
Mei
, and Y.
Zhao
, ACS Nano
13
, 8537
(2019
). 33.
L.
Xue
, J.
Iturri
, M.
Kappl
, H.-J.
Butt
, and A.
del Campo
, Langmuir
30
, 11175
(2014
). 34.
D.-M.
Drotlef
, L.
Stepien
, M.
Kappl
, W. J. P.
Barnes
, H.-J.
Butt
, and A.
del Campo
, Adv. Funct. Mater.
23
, 1137
(2013
). 35.
C.
Zhang
, Y.
Ou
, W.-X.
Lei
, L.-S.
Wan
, J.
Ji
, and Z.-K.
Xu
, Angew. Chem. Int. Ed.
55
, 3054
(2016
). 36.
L.
Xue
, A.
Kovalev
, F.
Thöle
, G. T.
Rengarajan
, M.
Steinhart
, and S. N.
Gorb
, Langmuir
28
, 10781
(2012
). 37.
L.
Xue
, A.
Kovalev
, K.
Dening
, A.
Eichler-Volf
, H.
Eickmeier
, M.
Haase
, D.
Enke
, M.
Steinhart
, and S. N.
Gorb
, Nano Lett.
13
, 5541
(2013
). © 2021 Author(s).
2021
Author(s)
You do not currently have access to this content.
