Gold films on an elastomeric substrate can be stretched and relaxed reversibly by tens of percent. The films initially form in two different structures, one continuous and the other containing tribranched microcracks. We have identified the mechanism of elastic stretchability in the films with microcracks. The metal, which is much stiffer than the elastomer, forms a percolating network. To accommodate the large elongation of the elastomeric substrate, the metal network twists and deflects out of the plane but remains bonded to the soft substrate. Consequently, the metal film experiences only small strains and deforms elastically without suffering fatigue.
REFERENCES
1.
2.
H.
Huang
and F.
Spaepen
, Acta Mater.
48
, 3261
(2000
).3.
S. L.
Chiu
, J.
Leu
, and P. S.
Ho
, J. Appl. Phys.
76
, 5136
(2000
).4.
F.
Macionczyk
and W.
Bruckner
, J. Appl. Phys.
86
, 4922
(1999
).5.
Y.
Xiang
, T.
Li
, Z.
Suo
, and J. J.
Vlassak
, Appl. Phys. Lett.
87
, 161910
(2005
).6.
S.
Périchon-Lacour
, S.
Wagner
, Z.
Huang
, and Z.
Suo
, Appl. Phys. Lett.
82
, 2404
(2003
).7.
S. P.
Lacour
, J. E.
Jones
, S.
Wagner
, T.
Li
, and Z.
Suo
, Proc. IEEE
93
, 1459
(2005
).8.
D. S.
Gray
, J.
Tien
, and C. S.
Chen
, Adv. Mater. (Weinheim, Ger.)
16
, 393
(2004
).9.
S. P.
Lacour
, S.
Wagner
, and Z.
Suo
, Mater. Res. Soc. Symp. Proc.
795
, U
–6
9
–1
(2003
).10.
S.
Wagner
, H.
Gleskova
, I.-C.
Cheng
, J. C.
Sturm
, and Z.
Suo
, in Flexible Flat Panel Displays
, edited by G. P.
Crawford
(Wiley
, Chichester
, 2005
), pp. 263
–283
.11.
V. J.
Lumelsky
, M. S.
Shur
, and S.
Wagner
, IEEE Sens. J.
1
, 41
(2001
).12.
M.
Maghribi
, J.
Hamilton
, D.
Polla
, K.
Rose
, T.
Wilson
, and P.
Krulevitch
, Madison: Second Annual International IEEE-EMBS Special Topic Conference on Microtechnologies in Medicine and Biology
(IEEE
, New York, 2002
), pp. 80
–83
.13.
S. P.
Lacour
, C.
Tsay
, S.
Wagner
, Zhe
Yu
, and B.
Morrison
III, The Fourth IEEE Conference on Sensors
, Irvine (IEEE
, New York, 2005
), pp. 617
–620
.© 2006 American Institute of Physics.
2006
American Institute of Physics
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