PMID- 38288748
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20240208
IS  - 1520-5207 (Electronic)
IS  - 1520-5207 (Linking)
VI  - 128
IP  - 5
DP  - 2024 Feb 8
TI  - Ionic Strength-Dependent Structure of Complex Coacervate Core Micelles.
PG  - 1256-1265
LID - 10.1021/acs.jpcb.3c06004 [doi]
AB  - Salt concentration-dependent structure of complex coacervate core micelles 
      (C3Ms), formed by polyether-based block copolyelectrolytes containing cationic 
      ammonium (A) or anionic sulfonate (S) groups in aqueous media, is investigated by 
      light scattering and small-angle X-ray/neutron scattering (SAX/NS). As the salt 
      concentration increases, both a core radius (R(core)) and an aggregation number 
      (N(agg)) significantly decrease, but a corona thickness (L(corona)) is nearly 
      unchanged. Larger salt concentrations can lower the interfacial tension between 
      the coacervate cores and aqueous media, resulting in an increased interfacial 
      area per chain and a more relaxed conformation of the core blocks. Based on the 
      structure characterization, the scaling relationship between structure parameters 
      (i.e., R(core), N(agg), and L(corona)) and salt concentration is obtained and 
      compared to the theoretical description estimated by the free energy balance 
      between the entropic penalty of core stretching and the interfacial energy. We 
      propose that the free energy contribution of the core block stretching is not 
      negligible in C3Ms because of the highly swollen cores caused by water.
FAU - Heo, Tae-Young
AU  - Heo TY
AD  - Department of Chemical Engineering, Hongik University, Seoul 04066, Republic of 
      Korea.
FAU - Choi, Soo-Hyung
AU  - Choi SH
AUID- ORCID: 0000-0002-4078-6285
AD  - Department of Chemical Engineering, Hongik University, Seoul 04066, Republic of 
      Korea.
LA  - eng
PT  - Journal Article
DEP - 20240130
PL  - United States
TA  - J Phys Chem B
JT  - The journal of physical chemistry. B
JID - 101157530
SB  - IM
EDAT- 2024/01/30 12:42
MHDA- 2024/01/30 12:43
CRDT- 2024/01/30 07:55
PHST- 2024/01/30 12:43 [medline]
PHST- 2024/01/30 12:42 [pubmed]
PHST- 2024/01/30 07:55 [entrez]
AID - 10.1021/acs.jpcb.3c06004 [doi]
PST - ppublish
SO  - J Phys Chem B. 2024 Feb 8;128(5):1256-1265. doi: 10.1021/acs.jpcb.3c06004. Epub 
      2024 Jan 30.