TY - JOUR
T1 - Nano-domain formation in charged membranes
T2 - Beyond the Debye-Hückel approximation
AU - Okamoto, Ryuichi
AU - Shimokawa, Naofumi
AU - Komura, Shigeyuki
N1 - Funding Information:
NS acknowledges support from the Grant-in-Aid for Young Scientist (B) (Grant No. 26800222) from the Japan Society for the Promotion of Science (JSPS) and the Grant-in-Aid for Scientific Research on Innovative Areas Molecular Robotics (Grant No. 15H00806) from the Ministry of Education, Culture, Sports, Science, and Technology of Japan (MEXT). SK acknowledges support from the Grant-in-Aid for Scientific Research on Innovative Areas Fluctuation and Structure (Grant No. 25103010) from the MEXT, the Grant-in-Aid for Scientific Research (C) (Grant No. 15K05250) from the JSPS, and the JSPS Core-to-Core Program International Research Network for Non-equilibrium Dynamics of Soft Matter.
PY - 2016/4
Y1 - 2016/4
N2 - We investigate the microphase separation in a membrane composed of charged lipids, by taking into account explicitly the electrostatic potential and the ion densities in the surrounding solvent. While the overall (membrane and solvent) charge neutrality is assumed, the membrane can have a non-zero net charge. The static structure factor in the homogeneous state is analytically obtained without using the Debye-Hückel approximation and is found to have a peak at an intermediate wave number. For a binary membrane composed of anionic and neutral lipids, the characteristic wave number corresponds to a scale from several to tens of nanometers. Our numerical calculation further predicts the existence of nano-domains in charged membranes.
AB - We investigate the microphase separation in a membrane composed of charged lipids, by taking into account explicitly the electrostatic potential and the ion densities in the surrounding solvent. While the overall (membrane and solvent) charge neutrality is assumed, the membrane can have a non-zero net charge. The static structure factor in the homogeneous state is analytically obtained without using the Debye-Hückel approximation and is found to have a peak at an intermediate wave number. For a binary membrane composed of anionic and neutral lipids, the characteristic wave number corresponds to a scale from several to tens of nanometers. Our numerical calculation further predicts the existence of nano-domains in charged membranes.
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U2 - 10.1209/0295-5075/114/28002
DO - 10.1209/0295-5075/114/28002
M3 - Article
AN - SCOPUS:84973354148
VL - 114
JO - Europhysics Letters
JF - Europhysics Letters
SN - 0295-5075
IS - 2
M1 - 28002
ER -