Microscale ratchet structured surfaces were coated with nanoparticles, which resulted in anisotropic behavior of superparamagnetic microdroplet by magnetic field actuation. This ratchet structure enables superparamagnetic microdroplets to generate the anisotropic behavior through the alternative external magnetic field. A tuning behavior was revealed by changing the height of ratchet, the numbers of superparamagnetic nanoparticles, and the size of microdroplets. It is significant to understand the wetting properties on superhydrophobic surfaces with anisotropic structure.
REFERENCES
1.
L. P.
Faucheux
, L.
Bourdieu
, P.
Kaplan
, and A.
Libchaber
, Phys. Rev. Lett.
74
, 1504
(1995
).2.
C.-F.
Chou
, O.
Bakajin
, S.
Turner
, T. A.
Duke
, S.
Chan
, E.
Cox
, H. G.
Craighead
, and R. H.
Austin
, Proc. Natl. Acad. Sci. U.S.A.
96
, 13762
(1999
).3.
P. S.
Doyle
, J.
Bibette
, A.
Bancaud
, and J.-L.
Viovy
, Science
295
, 2237
(2002
).4.
D. R.
Baselt
, G. U.
Lee
, M.
Natesan
, S. W.
Metzger
, P. E.
Sheehan
, and R. J.
Colton
, Biosens. Bioelectron.
13
, 731
(1998
).5.
J. M.
Perez
, T.
O’Loughin
, F. J.
Simeone
, R.
Weissleder
, and L.
Josephson
, J. Am. Chem. Soc.
124
, 2856
(2002
).6.
L. E.
Scriven
and C. V.
Sternling
, Nature (London)
187
, 186
(1960
).7.
C. G. M.
Marangoni
, Ann. Phys.
143
, 337
(1871
).8.
9.
Y.
Sumino
, N.
Magome
, T.
Hamade
, and K.
Yoshikawa
, Phys. Rev. Lett.
94
, 068301
(2005
).10.
J. B.
Brzoska
, F.
Brochard-Wyart
, and F.
Rondelez
, Langmuir
9
, 2220
(1993
).11.
M. G.
Pollack
, R. B.
Fair
, and A. D.
Shenderov
, Appl. Phys. Lett.
77
, 1725
(2000
).12.
H.
Link
, B. J.
Alemán
, L. D.
Melling
, M. J.
Taormina
, M. J.
Francis
, C. C.
Dow-Hygelund
, V.
Narayanan
, R. P.
Taylor
, and A.
Stout
, Phys. Rev. Lett.
96
, 154502
(2006
).13.
K.
Ichimura
, S.
Oh
, and M.
Nakagawa
, Science
288
, 1624
(2002
).14.
C.
Marquet
, A.
Buguin
, L.
Talini
, and P.
Silberzan
, Phys. Rev. Lett.
88
, 168301
(2002
).15.
A.
Egatz-Gómez
, S.
Melle
, A. A.
Lindsay
, M.
Márquez
, P.
Domínguez-García
, M. A.
Rubio
, S. T.
Picraux
, J. L.
Taraci
, T.
Clement
, D.
Yang
, M. A.
Hayes
, and D.
Gust
, Appl. Phys. Lett.
89
, 034106
(2006
).16.
A.
Buguin
, L.
Talini
, and P.
Silberzan
, Appl. Phys. A: Mater. Sci. Process.
75
, 207
(2002
).17.
A. A.
García
, A.
Egatz-Gómez
, S. A.
Lindsay
, P.
Domínguez-García
, S.
Melle
, M.
Marquez
, M. A.
Rubio
, S. T.
Picraux
, D.
Yang
, P.
Aella
, M. A.
Hayes
, D.
Gust
, S.
Loyprasert
, T.
Vazquez-Alvarez
, and J.
Wang
, J. Magn. Magn. Mater.
311
, 238
(2007
).18.
X.
Hong
, X.
Gao
, and L.
Jiang
, J. Am. Chem. Soc.
129
, 1478
(2007
).19.
Z.-G.
Guo
, F.
Zhou
, J.-C.
Hao
, Y.-M.
Liang
, W.-M.
Liu
, and W. T. S.
Huck
, Appl. Phys. Lett.
89
, 081911
(2006
).20.
C.
Cottin-Bizonne
, J.-L.
Barrat
, L.
Bocquet
, and E.
Charlaix
, Nature Mater.
2
, 237
(2003
).21.
Z.
Yoshimitsu
, A.
Nakajima
, T.
Watanabe
, and K.
Hashimoto
, Langmuir
18
, 5818
(2002
).22.
L.
Feng
, S.
Li
, Y.
Li
, H.
Li
, L.
Zhang
, J.
Zhai
, Y.
Song
, B.
Liu
, L.
Jiang
, and D.
Zhu
, Adv. Mater. (Weinheim, Ger.)
14
, 1857
(2002
).23.
Y.
Zheng
, X.
Gao
, and L.
Jiang
, Soft Matter
3
, 178
(2007
).24.
See EPAPS Document No. E-APPLAB-94-017912 for details of methods used to prepare ratchet surface and superparamagnetic microdroplet, and videos to view anisotropic behaviors of microdroplets. For more information on EPAPS see http://www.aip.org/pubservs/epaps.html.
25.
L.
Jiang
, Y.
Zhao
, and J.
Zhai
, Angew. Chem., Int. Ed.
43
, 4338
(2004
).26.
X.
Hong
, X.
Zhang
, X.
Chen
, L.
Xu
, Y.
Liu
, F.
Liu
, and Y.
Bai
, Int. J. Nanosci.
1
, 701
(2002
).27.
28.
J.
Zhang
, X.
Gao
, and L.
Jiang
, Langmuir
23
, 3230
(2007
).29.
C. W.
Extrand
, Langmuir
21
, 10370
(2005
).30.
P. G.
Wapner
and W. P.
Hoffman
, Langmuir
18
, 1225
(2002
).31.
D.
Richard
, C.
Clanet
, and D.
Quèrè
, Nature (London)
417
, 811
(2002
).© 2009 American Institute of Physics.
2009
American Institute of Physics
You do not currently have access to this content.