TY - JOUR
T1 - The modified Cassie's equation and contact angle hysteresis
AU - Xu, Xianmin
AU - Wang, Xiaoping
PY - 2013/2
Y1 - 2013/2
N2 - In this paper, we derive a modified Cassie's equation for wetting on chemically patterned surfaces from a homogenization approach. The derivation reveals that effective contact angle is a local average of the static contact angle along the contact line which describes all possible equilibrium states including the local minimum of the free energy of the system. The usual Cassie's state which corresponds to the global minimum is only a special case. We then discuss the contact angle hysteresis on chemically patterned surfaces.
AB - In this paper, we derive a modified Cassie's equation for wetting on chemically patterned surfaces from a homogenization approach. The derivation reveals that effective contact angle is a local average of the static contact angle along the contact line which describes all possible equilibrium states including the local minimum of the free energy of the system. The usual Cassie's state which corresponds to the global minimum is only a special case. We then discuss the contact angle hysteresis on chemically patterned surfaces.
KW - Homogenization
KW - The Cassie's equation
KW - Wetting hysteresis
UR - https://www.webofscience.com/wos/woscc/full-record/WOS:000313737700007
UR - https://openalex.org/W2113446117
UR - https://www.scopus.com/pages/publications/84878373442
U2 - 10.1007/s00396-012-2748-1
DO - 10.1007/s00396-012-2748-1
M3 - Journal Article
SN - 0303-402X
VL - 291
SP - 299
EP - 306
JO - Colloid and polymer science
JF - Colloid and polymer science
IS - 2
ER -