Ionic Strength-Dependent Structure of Complex Coacervate Core Micelles.

J Phys Chem B

Department of Chemical Engineering, Hongik University, Seoul 04066, Republic of Korea.

Published: February 2024

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 () and an aggregation number () significantly decrease, but a corona thickness () 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., , , and ) 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.

Download full-text PDF

Source
http://dx.doi.org/10.1021/acs.jpcb.3c06004DOI Listing

Publication Analysis

Top Keywords

structure complex
8
complex coacervate
8
coacervate core
8
core micelles
8
aqueous media
8
salt concentration
8
free energy
8
core
6
ionic strength-dependent
4
structure
4

Similar Publications

Investigation of the effect of solvation on J(Metal-P) spin-spin coupling.

Phys Chem Chem Phys

January 2025

Institute of Inorganic Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, SK-84536 Bratislava, Slovakia.

The solvent effect on the indirect J(M-P) spin-spin coupling constant in phosphine selenoether -substituted acenaphthene complexes LMCl is studied at the PP86 level of nonrelativistic and four-component relativistic density functional theory. Depending on the metal, the solvent effect can amount to as much as 50% or more of the total -value. This explains the previously found disagreement between the J(Hg-P) coupling in LHgCl, observed experimentally and calculated without considering solvent effects.

View Article and Find Full Text PDF

Background: In this study, we present an in-depth analysis of the Eurasian minnow (Phoxinus phoxinus) genome, highlighting its genetic diversity, structural variations, and evolutionary adaptations. We generated an annotated haplotype-phased, chromosome-level genome assembly (2n = 50) by integrating high-fidelity (HiFi) long reads and chromosome conformation capture data (Hi-C).

Results: We achieved a haploid size of 940 megabase pairs (Mbp) for haplome 1 and 929 Mbp for haplome 2 with high scaffold N50 values of 36.

View Article and Find Full Text PDF

A PEDOT:PSS-based flexible bimodal resonant sensor with independently controllable modes.

Chem Commun (Camb)

January 2025

College of Electronic and Optical Engineering & College of Flexible Electronics (Future Technology), State Key Laboratory of Organic Electronics and Information Displays, Nanjing University of Posts & Telecommunications (NJUPT), Nanjing, 210023, China.

Traditional sensors struggle in complex human environments, particularly with humidity and strain detection requiring high sensitivity and robust anti-interference. This work introduces a flexible, miniaturized, low-cost dual-mode sensor that combines a novel resonator structure with a chemically modified conducting polymer, enabling simultaneous strain and humidity detection alongside high anti-interference performance sensitivity and wireless transmission.

View Article and Find Full Text PDF

Quantifying Bone Collagen Fingerprint Variation Between Species.

Mol Ecol Resour

January 2025

Manchester Institute of Biotechnology, School of Natural Sciences, University of Manchester, Manchester, UK.

Collagen is the most ubiquitous protein in the animal kingdom and one of the most abundant proteins on Earth. Despite having a relatively repetitive amino acid sequence motif that enables its triple helical structure, in type 1 collagen, that dominates skin and bone, there is enough variation for its increasing use for the biomolecular species identification of animal tissues processed or degraded beyond the amenability of DNA-based analyses. In recent years, this has been most commonly achieved through the technique of collagen peptide mass fingerprinting (PMF) known as ZooMS (Zooarchaeology by Mass Spectrometry), applied to the analysis of tens of thousands of samples across over one hundred studies in the past decade alone.

View Article and Find Full Text PDF

Flotillins in membrane trafficking and physiopathology.

Biol Cell

January 2025

CRBM (Centre de Recherche en Biologie cellulaire de Montpellier), BIOLuM, University of Montpellier, CNRS UMR 5237, Montpellier, France.

Flotillin 1 and 2 are highly conserved and homologous members of the stomatin, prohibitin, flotillin, HflK/C (SPFH) family. These ubiquitous proteins assemble into hetero-oligomers at the cytoplasmic membrane in sphingolipid-enriched domains. Flotillins play crucial roles in various cellular processes, likely by concentrating sphingosine.

View Article and Find Full Text PDF

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!