We report ellipsometrically obtained adsorption isotherms for a carefully chosen test liquid on block copolymer films of Kraton G1650, compared with adsorption isotherms on homogeneous films of the constituent polymers. Standard atomic force microscopy images imply the outer surface of Kraton G1650 is chemically patterned on the nanoscale, but this could instead be a reflection of structure buried beneath a 10 nm layer of the lower energy component. Our test liquid was chosen on the basis that it did not dissolve in either component and in addition that it was nonwetting on the lower energy polymer while forming thick adsorbed films on pure substrates of the higher energy component. Our ellipsometry data for Kraton G1650 rule out the presence of segregation by the lower energy constituent to the outer surface, implying a mixed surface consistent with Cassie’s law. We discuss implications of our findings and related work for the outer surface structures of block copolymer films.

1.
P. G.
deGennes
,
Rev. Mod. Phys.
57
,
827
(
1985
).
2.
R.
Evans
,
J. Phys.: Condens. Matter
2
,
8989
(
1990
).
3.
R. N.
Wenzel
,
Ind. Eng. Chem.
28
,
988
(
1936
).
4.
A. B. D.
Cassie
,
Discuss. Faraday Soc.
3
,
11
(
1948
).
5.
A.
Valencia
and
R.
Lipowsky
,
Langmuir
20
,
1986
(
2004
).
6.
S.
Dietrich
, in
New Approaches to Problems in Liquid State Theory
, edited by
C.
Caccamo
,
J. P.
Hansen
, and
G.
Stell
(
Kluwer
, Dordrecht,
1999
);
C.
Bauer
and
S.
Dietrich
,
Phys. Rev. E
61
,
1664
(
2000
).
7.
A. O.
Parry
,
A. J.
Wood
, and
C.
Rascón
,
J. Phys.: Condens. Matter
12
,
7671
(
2000
);
A. O.
Parry
,
A. J.
Wood
, and
C.
Rascón
,
J. Phys.: Condens. Matter
13
,
4591
(
2001
);
C.
Rascón
and
A. O.
Parry
,
J. Chem. Phys.
115
,
5258
(
2001
).
8.
J. R.
Henderson
,
J. Phys.: Condens. Matter
11
,
629
(
1999
);
J. R.
Henderson
,
J. Chem. Phys.
120
,
1535
(
2004
);
[PubMed]
J. R.
Henderson
,
Phys. Rev. E
69
,
061613
(
2004
).
9.
H.
Bock
and
M.
Schoen
,
J. Phys.: Condens. Matter
12
,
1545
(
2000
);
H.
Bock
and
M.
Schoen
,
J. Phys.: Condens. Matter
12
,
1569
(
2000
);
S.
Sacquin
,
M.
Schoen
, and
A. H.
Fuchs
,
Mol. Phys.
100
,
2971
(
2002
).
10.
M.
Schneemilch
,
N.
Quirke
, and
J. R.
Henderson
,
J. Chem. Phys.
118
,
816
(
2003
);
M.
Schneemilch
,
N.
Quirke
, and
J. R.
Henderson
,
J. Chem. Phys.
120
,
2901
(
2004
).
[PubMed]
11.
I. W.
Hamley
,
The Physics of Block Copolymers
(
Oxford University Press
, Oxford,
1998
).
12.
F. S.
Bates
and
G. H.
Fredrickson
,
Phys. Today
52
,
32
(
1999
).
13.
H.
Hasegawa
and
T.
Hashimoto
, in
Comprehensive Polymer Science
, edited by
S. L.
Aggerwal
and
S.
Russo
(
Pergamon
, London,
1996
).
14.
H.
Hasegawa
and
T.
Hashimoto
,
Macromolecules
18
,
589
(
1985
).
15.
G.
Kim
and
M.
Libera
,
Macromolecules
31
,
2670
(
1998
).
16.
A.
Turturro
,
E.
Gattiglia
,
P.
Vacca
, and
G. T.
Viola
,
Polymer
36
,
3987
(
1995
).
17.
Polymer Handbook
, 4th ed., edited by
J.
Brandrup
,
E. H.
Immergut
, and
E. A.
Grulke
(
Wiley
, New York,
1998
).
18.
Polymer Data Handbook
, edited by
J. E.
Mark
(
Oxford University Press
, New York,
1999
).
19.
S. N.
Jasperson
and
S. E.
Schnatterly
,
Rev. Sci. Instrum.
40
,
761
(
1969
).
20.
Handbook of Optical Constants of Solids
, edited by
E. D.
Palik
(
Academic
, Orlando,
1985
).
21.
M.
Born
and
E.
Wolf
,
Principles of Optics, Electromagnetic Theory of Propagation, Interference and Diffraction of Light
, 4th ed. (
Pergamon
, Oxford,
1970
).
22.
J. A.
Riddick
and
W. B.
Bunger
,
Organic Solvents: Physical Properties and Methods of Purification
, 3rd ed. (
Wiley-Interscience
, New York,
1970
).
23.
W. G.
Miller
and
N. L.
Abbott
,
Langmuir
13
,
7106
(
1997
).
24.
A.
Knoll
,
A. R.
Magerle
, and
G.
Krausch
,
Macromolecules
34
,
4159
(
2001
).
25.
H.
Hasegawa
and
T.
Hashimoto
,
Polymer
33
,
475
(
1992
).
26.
H. R.
Thomas
and
J. J.
O’Malley
,
Macromolecules
14
,
1316
(
1981
).
27.
P. F.
Green
,
T. M.
Christensen
,
T. P.
Russell
, and
R.
Jerome
,
Macromolecules
22
,
2189
(
1989
).
28.
R. L.
Schmitt
,
J. A.
Gardella
,
J. H.
Magill
,
L.
Salvati
, and
R. L.
Chin
,
Macromolecules
18
,
2675
(
1985
).
29.
X.
Chen
,
J. A.
Gardella
and
P. L.
Kumler
,
Macromolecules
25
,
6621
(
1992
).
30.
T. A.
Mykhaylyk
,
S.
Collins
,
C.
Jani
, and
I. W.
Hamley
,
Eur. Polym. J.
40
,
1715
(
2004
).
31.
D. K.
Owens
and
R. C.
Wendt
,
J. Appl. Polym. Sci.
13
,
1741
(
1969
).
32.
D. Y.
Kwok
,
C. N.
Lam
,
A.
Li
,
K.
Zhu
,
R.
Wu
, and
A. W.
Neumann
,
Polym. Eng. Sci.
38
,
1675
(
1998
).
33.
A. H.
Ellison
and
W. A.
Zisman
,
J. Phys. Chem.
58
,
503
(
1954
).
34.
Kruss database, www.kruss.de
35.
T. J.
Menke
,
Z.
Funke
,
R. D.
Maier
, and
J.
Kressler
,
Macromolecules
33
,
6120
(
2000
).
36.
T. A.
Mykhaylyk
,
S. D.
Evans
,
C. M.
Fernyhough
,
I. W.
Hamley
, and
J. R.
Henderson
,
J. Colloid Interface Sci.
260
,
234
(
2003
).
37.
S.
Walheim
,
M.
Boltau
,
J.
Mlynek
,
G.
Krausch
, and
U.
Steiner
,
Macromolecules
30
,
4995
(
1997
).
You do not currently have access to this content.