We present analysis of adhesion properties of angled polymer nanohairs with a wide range of leaning angles from 0° to 45° and ultraviolet (UV)-curable polyurethane acrylate (PUA) materials of two different elastic moduli (19.8 and 320 MPa). It is demonstrated that shear adhesion and adhesion hysteresis can be greatly enhanced by increasing the leaning angle of nanohairs both for soft and hard materials due to increased contact area and reduced structural stiffness.
REFERENCES
1.
H. E.
Jeong
and K. Y.
Suh
, Nanotoday
4
, 335
(2009
).2.
B. X.
Zhao
, N.
Pesika
, H. B.
Zeng
, Z. S.
Wei
, Y. F.
Chen
, K.
Autumn
, K.
Turner
, and J.
Israelachvili
, J. Phys. Chem. B
113
, 3615
(2009
).3.
B.
Aksak
, M. P.
Murphy
, and M.
Sitti
, Langmuir
23
, 3322
(2007
).4.
M. P.
Murphy
, B.
Aksak
, and M.
Sitti
, Small
5
, 170
(2009
).5.
S.
Reddy
, E.
Arzt
, and A.
del Campo
, Adv. Mater.
19
, 3833
(2007
).6.
T.
Kim
, H. E.
Jeong
, K. Y.
Suh
, and H. H.
Lee
, Adv. Mater.
21
, 2276
(2009
).7.
S.
Kim
, M.
Spenko
, S.
Trujillo
, B.
Heyneman
, D.
Santos
, and M. R.
Cutkosky
, IEEE Trans. Robot.
24
, 65
(2008
).8.
J. H.
Lee
, R. S.
Fearing
, and K.
Komvopoulos
, Appl. Phys. Lett.
93
, 191910
(2008
).9.
H. E.
Jeong
, J. K.
Lee
, H. N.
Kim
, S. H.
Moon
, and K. Y.
Suh
, Proc. Natl. Acad. Sci. U.S.A.
106
, 5639
(2009
).10.
P. J.
Yoo
, S. J.
Choi
, J. H.
Kim
, D.
Suh
, S. J.
Baek
, T. W.
Kim
, and H. H.
Lee
, Chem. Mater.
16
, 5000
(2004
).11.
C. M.
Pooley
and D.
Tabor
, Proc. R. Soc. London, Ser. A
329
, 251
(1972
).12.
C. S.
Majidi
, R. E.
Groff
, and R. S.
Fearing
, J. Appl. Phys.
98
, 103521
(2005
).13.
J. H.
Lee
, C. S.
Majidi
, B.
Schubert
, and R. S.
Fearing
, J. R. Soc., Interface
5
, 835
(2008
).14.
C. S.
Majidi
, Mech. Res. Commun.
36
, 369
(2009
).15.
16.
K.
Autumn
, C.
Majidi
, R. E.
Groff
, A.
Dittmore
, and R.
Fearing
, J. Exp. Biol.
209
, 3558
(2006
).17.
K.
Autumn
, Y. A.
Liang
, S. T.
Hsieh
, W.
Zesch
, W. P.
Chan
, T. W.
Kenny
, R.
Fearing
, and R. J.
Full
, Nature (London)
405
, 681
(2000
).© 2010 American Institute of Physics.
2010
American Institute of Physics
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