TY - JOUR
T1 - Structural changes in block copolymers
T2 - Coupling of electric field and mobile ions
AU - Tsori, Yoav
AU - Tournilhac, François
AU - Andelman, David
AU - Leibler, Ludwik
N1 - Funding Information:
We thank T. Russell for discussions and communica?>tion of his experimental results prior to publication and ?>T. Thurn-Albrecht for useful comments. One of us (D. A.) acknowledges support from the Israel Science Foundation under Grant No. 210/02.
PY - 2003/4/11
Y1 - 2003/4/11
N2 - An alternative mechanism explaining structural changes in polarized media such as diblock copolymers is proposed. The mechanism is based on the interaction of free charges with an external field rather than on the tendency to reduce dielectric interfaces perpendicular to the field. Calculation of the deformation of the bcc phase of diblock copolymers using the dielectric mechanism only, show that the critical field for transition to a hexagonal phase is Ec≈70 V/μm.
AB - An alternative mechanism explaining structural changes in polarized media such as diblock copolymers is proposed. The mechanism is based on the interaction of free charges with an external field rather than on the tendency to reduce dielectric interfaces perpendicular to the field. Calculation of the deformation of the bcc phase of diblock copolymers using the dielectric mechanism only, show that the critical field for transition to a hexagonal phase is Ec≈70 V/μm.
UR - http://www.scopus.com/inward/record.url?scp=0037527863&partnerID=8YFLogxK
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AN - SCOPUS:0037527863
SN - 0031-9007
VL - 90
SP - 145504/1-145504/4
JO - Physical Review Letters
JF - Physical Review Letters
IS - 14
M1 - 145504
ER -