Article
Chemistry, Physical
Jun-Sik Sin
Summary: Theoretical investigation using Poisson-Boltzmann approach shows that ion partitioning enhances electrostatic interaction between two charged surfaces and increases osmotic pressure. The ion partitioning effect is amplified not only by an increase in the thickness of the polyelectrolyte layer or Debye length, but also by a decrease in ion radius.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Physics, Multidisciplinary
Alexei M. Frolov
Summary: The total energy and other bound state properties of the ground state in the Ps(-) ion were determined to very high accuracy. The variational energy obtained for the ground state in this ion was the lowest ever obtained. Various expectation values of the Ps(-) ion were evaluated using highly accurate wave functions, including arij nk expectation values and singular expectation values. The accurate expectation values were then used to determine the rates of multi-photon annihilation in the negatively charged positronium ion.
Article
Materials Science, Multidisciplinary
J. C. Sell, J. R. Vannucci, D. G. Suarez-Forero, B. Cao, D. W. Session, H-J Chuang, K. M. McCreary, M. R. Rosenberger, B. T. Jonker, S. Mittal, M. Hafezi
Summary: Monolayer transition metal dichalcogenides (TMDs) have various optically excited quasiparticle species, and their magnetic response provides insights into these quasiparticles. The response of 2s charged excitons to external magnetic fields in TMDs is still not well understood. In this study, the presence of 2s charged excitons and their response to magnetic fields were observed and compared to neutral excitons.
Article
Chemistry, Physical
Yawen Miao, Kai Chen, Xu Zhang, Zhijun Xu, Xiaoning Yang
Summary: Studying the interaction of ionized two-dimensional graphene oxide (GO) nanosheets at the air-water interface revealed that GO nanosheets with the same negative charge can attract each other at the interface, in contrast with repulsive interaction in the bulk phase. This attractive interaction is attributed to an enhanced solvation force arising from shared bridge water structure at the interface between negatively charged GO sheets.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Materials Science, Multidisciplinary
N. M. Kazuchits, V. N. Kazuchits, M. S. Rusetsky, A. Mazanik, V. A. Skuratov, K. S. Moe, A. M. Zaitsev
Summary: This study found that the ND1 center exhibits strong photoluminescence at 393.5nm under the excitation of a 355nm laser. The emission of the ND1 center is composed of a zero-phonon line and vibrational replicas related to quasilocal vibrations. The energy of these quasilocal vibrations remains the same in both luminescence and absorption. Additionally, the interaction between the ND1 center and lattice phonons is very weak.
DIAMOND AND RELATED MATERIALS
(2022)
Article
Engineering, Biomedical
Miusi Shi, Wenting Mo, Haoning Qi, Yueqi Ni, Rui Wang, Kailun Shen, Fanyu Zhang, Shuting Jiang, Xuehui Zhang, Lili Chen, Yufeng Zhang, Xuliang Deng
Summary: This study reveals the vital role of the Pro-His-Ser-Arg-Asn peptide in fibronectin-mediated cell adhesion on implant surfaces. Molecular dynamics simulation shows that the peptide has a higher affinity and greater adsorption energy with the titanium oxide surface due to the formation of stronger hydrogen bonds. Increasing the oxygen content in the titanium oxide surface through ion-beam implantation improves cell adhesion, cell differentiation, and subsequent biomineralization on titanium implants.
ADVANCED HEALTHCARE MATERIALS
(2022)
Article
Biochemistry & Molecular Biology
Jing-Yuan Chang, Yen-Jin Pan, Pei-Yu Huang, Yi-Ting Sun, Chen-Hsu Yu, Zhi-Jun Ning, Shou-Ling Huang, Shing-Jong Huang, Richard P. Cheng
Summary: The beta-sheet is a common protein secondary structure and its aberrant aggregation is associated with neurodegenerative diseases. This study systematically investigates the effects of charged amino acid side-chain length on a diagonal ion-pairing interaction in a beta-hairpin. Results show that the fraction folded population for peptides with diagonal ion pairs is generally lower compared to those with lateral ion pairs.
Article
Chemistry, Applied
Saman Sabet, Ali Rashidinejad, Laurence D. Melton, Zoran Zujovic, Alireza Akbarinejad, Michel Nieuwoudt, Chris K. Seal, Duncan J. McGillivray
Summary: This study explored the interactions between gum arabic and alginate, finding that only specific fractions of gum arabic interact with alginate at pH 4. The intensity of interaction was significantly higher for glycoprotein compared to arabinogalactan protein. The findings suggest a potential electrostatic interaction between positively charged proteins in gum arabic and negatively charged carboxylate groups in alginate.
FOOD HYDROCOLLOIDS
(2021)
Article
Chemistry, Physical
Shiqi Zhou, Amin Bakhshandeh
Summary: We utilized classical Density Functional Theory (cDFT) and Monte Carlo simulations to investigate the interaction between heterogeneously charged surfaces in an electrolyte solution. Our study showed consistent behavior between cDFT and Monte Carlo simulations in terms of force curves and two-dimensional density profiles. By using the validated cDFT, we explored the effects of challenging-to-simulate parameters on the system's behavior, including domain size, domain charge, domain charge configuration, and bulk electrolyte concentration. Notably, the force curve was found to be more sensitive to domain size in an asymmetric configuration, while the bulk concentration had a weak influence on the force curve regardless of the system's configurations.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Biochemistry & Molecular Biology
Guan-Lin Wu, Yi-Jun Shi, Jing-Ting Chiou, Chia-Hui Huang, Yuan-Chin Lee, Liang-Jun Wang, Long-Sen Chang
Summary: This study investigated the role of carboxyl groups in maintaining the structure and function of Naja atra cardiotoxin 3 (CTX3). Modification of the carboxyl groups resulted in changes in the gross and fine structures of CTX3. The modified CTX3 showed reduced permeabilizing effect on anionic phospholipid vesicles and lower activity in inducing membrane leakage in U937 cells. The membrane interaction mode of CTX3 was also altered by the modification of carboxyl groups.
ARCHIVES OF BIOCHEMISTRY AND BIOPHYSICS
(2022)
Article
Chemistry, Physical
Zhang Zhang, Fang Yong, Lei Zhang, Hao Chen, Wen-Li Yuan, Dingguo Xu, Yi-Hong Shen, Xiao-Hua Wang, Ling He, Guo-Hong Tao
Summary: Designing functionalized task-specific ionic liquid is a promising way to alleviate potential second pollution in the PUREX process. The newly synthesized anion-functionalized ionic liquid shows high efficiency and selectivity in uranium extraction.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Physics, Multidisciplinary
S. Mouslih, M. Jakha, I Dahiri, S. Taj, B. Manaut, E. Siher
Summary: Most studies at electron-positron colliders have focused on W and Z bosons, which are important for the Standard Model theory and exploring new physics. A recent study found that lasers have a significant effect on the decay of Z bosons. In this work, the researchers investigated the decay of W- bosons in the presence of a circularly polarized electromagnetic field and found that lasers can reduce the probability of decay.
Article
Chemistry, Physical
Xuebo Quan, Daohui Zhao, Jian Zhou
Summary: The study utilizing coarse-grained molecular dynamics simulations reveals that the surface ligands of AuNPs affect their interaction modes with lipid vesicles, with hydrophobic and electrostatic interactions playing crucial roles in this process. The findings provide a molecular-level understanding of the interplay between AuNPs and lipid vesicles, which may have implications for expanding the application of functional AuNPs in modern biomedicine.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Chemistry, Physical
Qianqian Song, Jianli Liang, Si Liu, Yunting Zhang, Jian Zhu, Changbao Zhu
Summary: In this study, a porous boron nitride nanofibers (BNNFs) artificial interface layer was constructed to control the growth of dendrite in aqueous zinc-ion batteries (ZIBs). The working mechanisms of the interface layer were revealed, including the position-selected electroplating, the self-concentrating and pumping features of Zn ions, and the shunt effect on Zn ions diffusion. The introduced interface layer not only achieved uniform Zn deposition but also restrained the dendrite growth, leading to long-term stable cycling.
Article
Chemistry, Multidisciplinary
Martina Gruening, Jonathan E. Dawson, Christian Voelkner, Sven Neuber, Katja Fricke, Ursula van Rienen, Sylvia Speller, Christiane A. Helm, J. Barbara Nebe
Summary: Through studying the impact of different surface charges on osteoblastic cell behavior, it was found that moderately positive surface charges can enhance actin filament formation, while highly positive surface charges can hinder cell spreading, resulting in a decrease in actin filament number and length. Our findings provide new insights into the influence of surface charges on overall cell shape and intracellular structures.
APPLIED SCIENCES-BASEL
(2021)
Article
Chemistry, Physical
Romain Lhermerout, Christophe Diederichs, Sapna Sinha, Kyriakos Porfyrakis, Susan Perkin
JOURNAL OF PHYSICAL CHEMISTRY B
(2019)
Article
Allergy
Federico Storni, Andris Zeltins, Ina Balke, Matthew D. Heath, Matthias F. Kramer, Murray A. Skinner, Lisha Zha, Elisa Roesti, Paul Engeroff, Lukas Muri, Diego von Werdt, Thomas Gruber, Mark Cragg, Malgorzata Mlynarczyk, Thomas M. Kundig, Monique Vogel, Martin F. Bachmann
JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY
(2020)
Article
Multidisciplinary Sciences
Alexander M. Smith, James E. Hallett, Susan Perkin
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2019)
Review
Biochemistry & Molecular Biology
Martin F. Bachmann, Mona O. Mohsen, Matthias F. Kramer, Matthew D. Heath
TRENDS IN MOLECULAR MEDICINE
(2020)
Article
Chemistry, Physical
Timothy S. Groves, Carla S. Perez-Martinez, Romain Lhermerout, Susan Perkin
Summary: Water-in-salt electrolytes are a novel class of aqueous solutions with wide electrochemical stability windows, but the high ion concentration makes them less understood compared to more dilute electrolyte solutions. Research has shown that these electrolytes form a layered structure at charged interfaces, composed of a hydrated cation nanostructure and nonaqueous anion-rich domains, which will impact their capacitance and double-layer behavior for energy storage applications.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Physics, Condensed Matter
Carla S. Perez-Martinez, Timothy S. Groves, Susan Perkin
Summary: This study demonstrates reversible and switchable actuation of two surfaces using AC electric fields, measuring adhesive forces and surface separation with sub-molecular resolution. The oscillatory structural force between surfaces across the fluid, unaffected by the AC field, allows for precise control of adhesive states through field tuning. Exquisite control of surface interactions using an external field is shown in this proof-of-concept.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2021)
Article
Chemistry, Multidisciplinary
Eleanor Milnes-Smith, Corinne A. Stone, Colin R. Willis, Susan Perkin
Summary: This study investigates the liquid- and temperature-dependency of surface reconstruction of plasma polymerized perfluoroalkyl acrylates using contact angle aging. The results show that the contact angles of both polar and nonpolar liquids exhibit time dependency above the bulk melting point of the polymers. It is also found that surface reconstruction can be driven by the preferential segregation and polar interactions.
Review
Chemistry, Physical
Fernando Bresme, Alexei A. Kornyshev, Susan Perkin, Michael Urbakh
Summary: This Review discusses the development of electronanotribology and its collaboration with room-temperature ionic liquids to control friction at the nanoscale. It highlights the potential of electrically controlling friction and the challenges that need to be addressed for future applications.
Article
Allergy
Jan M. Sobczak, Pascal S. Krenger, Federico Storni, Mona O. Mohsen, Ina Balke, Gunta Resevica, Matthew D. Heath, Thalia Carreno L. Velazquez, Matthias F. Kramer, Callum J. W. Scott, Murray A. Skinner, Andris Zeltins, Thomas M. Kundig, Monique Vogel, Martin F. Bachmann
Summary: A novel vaccine candidate (VLP Peanut) based on virus-like particles (VLPs) has been developed for the treatment of peanut allergy. The vaccine has shown to be highly immunogenic and effective in preventing and treating severe reactions caused by peanut allergy in mouse models. These findings suggest that VLP Peanut holds promise as a breakthrough immunotherapy vaccine candidate for peanut allergy.
Article
Multidisciplinary Sciences
James E. Hallett, Kieran J. Agg, Susan Perkin
Summary: Cellular organisms regulate electrolyte composition in the cytosol to optimize intracellular molecular interactions and balance external osmotic pressure. This study investigates the combined effect of ionic and zwitterionic solutes on interaction forces across electrolytes and finds that zwitterions have a clear role in modifying interactions compared to simple salt solutions.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Allergy
Pascal S. Krenger, Romano Josi, Jan Sobczak, Thalia L. C. Velazquez, Ina Balke, Murray A. Skinner, Matthias F. Kramer, Callum J. W. Scott, Simon Hewings, Matthew D. Heath, Andris Zeltins, Martin F. Bachmann
Summary: This study demonstrates that prokaryotic RNA encapsulated within VLP Peanut and the density of Ara h 2 antigen on viral particles are key contributors to the immunogenicity and protective capacity of the vaccine.
Article
Chemistry, Multidisciplinary
Hannah J. Hayler, Susan Perkin
Summary: The mixture of ethylene glycol (EG) and choline chloride (ChCl) is a typical deep eutectic solvent (DES), and its phase behavior and phase diagram differ significantly from the previous expectations. The eutectic point of this mixture lies between -28±1 degrees C and 0.01<x(ChCl)<0.02, and the eutectic temperature is not as "deep" as predicted by the ideal solution theory. Additionally, we observe a cold-crystallisation at T = -65 degrees C, which may have been mistakenly interpreted as the eutectic point.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Physical
James E. Hallett, Hannah J. Hayler, Susan Perkin
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2020)
Article
Chemistry, Multidisciplinary
Eleanor P. Milnes-Smith, Corinne A. Stone, Susan Perkin
CHEMICAL COMMUNICATIONS
(2020)
Article
Chemistry, Physical
Romain Lhermerout, Susan Perkin
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2020)
