Article
Chemistry, Physical
Ksenia S. Egorova, Marina M. Seitkalieva, Alexey S. Kashin, Evgeniy G. Gordeev, Anna V. Vavina, Alexandra V. Posvyatenko, Valentine P. Ananikov
Summary: This study investigated the cytotoxicity of chemically relevant imidazolium PILs with different alkyl side chains and compared it with aprotic analogues. The results highlighted the role of anion type in determining the cytotoxicity of ILs with short alkyl side chains. Even low-toxic PILs showed harmful effects on eukaryotic cells when used as cryopreservation agents, and the studied IL/water mixtures tended to form simple solid hydrates due to the weak amphiphilic properties of imidazolium cations with short alkyl side chains.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Engineering, Mechanical
M. D. Aviles, R. Pamies, J. Sanes, J. Arias-Pardilla, F. J. Carrion, M. D. Bermudez
Summary: The addition of Bis(2-hydroxyethyl) ammonium stearate (DES) protic ionic liquid crystal (PILC) to di-bis(2-hydroxyethyl) ammonium succinate (DSU) protic ionic liquid (PIL) lubricant blends significantly reduces friction coefficient and wear rate, while also preventing surface damage. Surface analysis using various techniques showed positive results after tribological tests.
TRIBOLOGY INTERNATIONAL
(2021)
Article
Chemistry, Physical
Vincent He, Victor J. Cadarso, Susanne Seibt, Ben J. Boyd, Adrian Neild
Summary: In this study, a microfluidic approach was used to prepare different aqueous and lipid droplets and induce phase transformations in the liquid medium. The results showed that when the lipid droplets and aqueous droplets coalesced, distinct structures with different compositions formed on the two sides of the merged droplet. Through diffusion limited interface, water molecules gradually hydrated the lipid portion, leading to a series of phase transformations. This study provides a new approach for studying the kinetics of phase transformations and identifying non-equilibrium phases in droplet-based lyotropic liquid systems.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Biochemistry & Molecular Biology
Natalia M. Selivanova, Aliya Galeeva, Yuriy G. Galyametdinov
Summary: This work describes the development of chitosan-based biocompatible systems that include new components: lactic acid and non-ionic surfactants. The systems are capable of forming gels or lyotropic liquid crystals (LLCs) and their rheological flow can be accurately described by the Casson flow model. Hydrogen bonding is supposed to be responsible for the formation of the LLCs. The studied systems show prolonged release capabilities for riboflavin.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Chemistry, Physical
Jannick Guschlbauer, Leszek Niedzicki, Litwin Jacob, Edyta Rzeszotarska, Damian Pociecha, Piotr Kaszynski
Summary: A new approach to anisotropic liquid electrolytes is explored using a non-ionic liquid crystalline host doped with a lithium salt. The concentration of the ionic additives does not significantly affect the stability of the mesophase, but expands the ion conducting channels. The conductivity and activation energy of the electrolyte vary with temperature and lithium ion concentration.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Physical
Juantao Zhang, Minjian Kong, Jiangtao Feng, Chengxian Yin, Danping Li, Lei Fan, Qibin Chen, Honglai Liu
Summary: A new type of dimeric imidazolium-type amphiphile, BDBCmIB, synthesized with bipyridiyl as the spacer, exhibits excellent inhibition performance for the corrosion of N80 carbon steel in 1.0 mol.L-1 HCl. The inhibition efficiency increases with concentration and tail chain length, with BDBC8IB showing the best performance exceeding 90%.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Pharmacology & Pharmacy
Vivek P. Chavda, Sathish Dyawanapelly, Shilpa Dawre, Ines Ferreira-Faria, Rajashri Bezbaruah, Niva Rani Gogoi, Praveen Kolimi, Divyang J. Dave, Ana Claudia Paiva-Santos, Lalitkumar K. Vora
Summary: Liquid crystal-based nanoformulations are efficient in delivering drugs and therapeutics to specific biological sites. Lyotropic liquid crystalline phases (LLCPs) have unique characteristics that make them promising drug delivery systems, offering improved drug loading, stability, and controlled release. Factors such as molecule shape, microsegregation, and chirality play important roles in the formation of these liquid crystalline phases. Additionally, due to their similarity to biological membranes, liquid crystals demonstrate higher bioadhesivity and biocompatibility, making them more effective for targeted drug delivery.
INTERNATIONAL JOURNAL OF PHARMACEUTICS
(2023)
Article
Chemistry, Inorganic & Nuclear
Yogita, Farheen, Havagiray Chitme, Kuldeep Kumar Raina, Ravi K. Shukla
Summary: Lyotropic liquid crystalline (LLC) phases were obtained from a binary mixture of Withania somnifera roots and ethylene glycol at various concentrations. The presence of hydrogen bonding between amphiphilic molecules and solvent is responsible for the formation of the lyotropic phase. The LLCs showed strong antibacterial activity against both gram-positive and gram-negative bacteria.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Review
Chemistry, Medicinal
Maria Chountoulesi, Stergios Pispas, Ioulia K. Tseti, Costas Demetzos
Summary: This review provides an overview of the engineering and characterization of non-lamellar lyotropic liquid crystalline nanosystems (LLCN), highlighting their advantages as drug delivery nanocarriers and innovative vaccine platforms. Non-lamellar LLCN demonstrate stimuli-responsive and controlled release properties, as well as unique adjuvant properties for immune system activation.
Article
Chemistry, Multidisciplinary
Shuiyang Liu, Guiyang Yan, Jiwei Wang, Jingda Zhou, Lele Bie, Yinggang Jia, Fanbao Meng
Summary: A series of oligomeric ionic liquid crystals (OILCs) were synthesized based on various anions, resulting in different mesophase types such as smectic, hexagonal columnar, and bicontinuous cubic phases. The effect of anions on the chemical structure, liquid-crystalline behavior, and ionic conductivity of OILCs was investigated. Ionic conductivities of OILCs films with different anions increase slightly in the order A-SO3-> D-SO3-> BF4-> Br-, with nearly twofold increase observed in films based on A-SO3(-)anion compared to Br- anions, attributed to ion migration and ionic channel effects in microstructures.
Article
Biochemistry & Molecular Biology
Aikaterini Tsoutsoura, Zhiqi He, Paschalis Alexandridis
Summary: This study investigates the effects of ionic liquids on the self-organization of block copolymers. The results show that block copolymers exhibit rich structural polymorphism in ionic liquids, and their behavior and structure differ from those in molecular solvents such as water and formamide.
Article
Nanoscience & Nanotechnology
Minji Kim, Seung Yeob Lee, Jihyun Kim, Changwon Choi, Yves Lansac, Hyungju Ahn, Sohee Park, Yun Hee Jang, Seoung Ho Lee, Byoung Hoon Lee
Summary: Inspired by the classic hard-soft acid-base theory, this study introduces a new ionic liquid to treat PEDOT:PSS and achieves similar levels of ion-exchange and stretchability enhancement compared to the best existing ionic liquid.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Guang Wang, Christopher J. Garvey, Senlin Gu, Weimin Gao, Luke A. O'Dell, Anwen M. Krause-Heuer, Tamim A. Darwish, Alexander Zhigunov, Xin Tong, Lingxue Kong
Summary: Introducing polymerizable monomers into a hexagonal lyotropic liquid crystalline (LLC) template can retain the nanostructure but decrease intra-and inter aggregate interactions. The system with a proper volume ratio of PEGDA/HEMA (1/4) shows excellent homogeneity, higher dimensional stability, and lower dynamic property, resulting in robust, free-standing, transparent membranes after photo-polymerization. The unique property of the system includes a lower order-disorder transition temperature facilitating mesochannel reorientation.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Ezgi Yilmaz Topuzlu, Halil Okur, Burak Ulgut, Omer Dag
Summary: The formation of lyotropic liquid crystalline (LLC) mesophases from LiX/C12E10/H2O aqueous solutions, and their stability parameters, including water/salt molar ratio and behavior at different humidity levels, have been investigated through gravimetric, spectroscopic, and conductivity measurements. The study revealed a strong correlation between the water/LiX mole ratio and atmospheric humidity levels, as well as the effect of different counteranions on the structural properties of the mesophases. Additionally, changes in the conductivity of the LLC mesophases were observed in response to variations in water content and the nature of the counteranion.
Editorial Material
Chemistry, Physical
William E. Acree, Shrika Eddula
Summary: The recent paper published by Musale and coworkers presents a polemic regarding the calculated apparent partial molar volumes of [DBUH][OAc] dissolved in water at 298.15 K, which are found to be miscalculated and inconsistent with the experimental density data reported in the paper.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Physical
Stefan Paporakis, Jack Binns, Dilek Yalcin, Calum J. Drummond, Tamar L. Greaves, Andrew V. Martin
Summary: A semi-automated software for high throughput identification of lyotropic liquid crystal phases (LCPs) from small-angle x-ray scattering (SAXS) data was developed and validated. The software showed equivalent accuracy to manual analysis in determining the thermal stability ranges and lattice parameters for CTAB-based LCPs. Additionally, the software was successfully applied to analyze scattering patterns of sodium dodecyl-sulfate in different solvents, constructing phase diagrams for the determination of LCPs.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Mariana A. Noronha, Natalia A. D'Angelo, German Perez-Sanchez, Patricia Severino, Mary Ann Foglio, Tamar L. Greaves, Jorge F. B. Pereira, Andre M. Lopes
Summary: This study elucidates the physicochemical properties of LPS-based micelles and their interaction with four different (bio)molecules. The results reveal the critical micelle concentration of LPS in an aqueous environment and the influence of encapsulation parameters on the interaction between LPS and hydrophobic (bio)molecules. Additionally, the study demonstrates that increasing LPS micelle size enhances the encapsulation capacity of the hydrophobic (bio)molecules.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Multidisciplinary
Aaron Elbourne, Madeleine Dupont, Rashad Kariuki, Nastaran Meftahi, Torben Daeneke, Tamar L. Greaves, Christopher F. McConville, Gary Bryant, Saffron J. Bryant, Quinn A. Besford, Andrew J. Christofferson
Summary: Ionic liquids (ILs) are extensively studied solvents with desirable properties for scientific and industrial applications. The IL-solid interface is a complex entity that has undergone evolving understanding, from a simple 1D double layer to a 3D ordered liquid interface. This study presents a holistic examination of the protic IL-solid interface, revealing a more complex nanostructure than previously reported and enhancing the overall understanding of IL interfacial solvation.
ADVANCED MATERIALS INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Yukun Zhang, Chong Chen, Zhengfei Chen, Tongtong Zhang, Yunlong Wang, Shuiyan Cao, Jun Ma
Summary: In this study, MXene-reinforced composite coatings were fabricated using an efficient, ambient, and solvent-free electron beam (EB) curing technology for metal anticorrosion. The dispersion of MXene nanoflakes was dramatically improved by modifying with PDMS-OH, which enhanced water resistance. The controllable irradiation-induced polymerization resulted in a unique high-density cross-linked network, providing a large physical barrier against corrosive media. The newly developed APU-PDMS@MX1 coatings exhibited excellent corrosion resistance with a protection efficiency of 99.9957%.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Sampa Sarkar, Brendan Dyett, Biserka Lakic, Andrew S. Ball, Leslie Y. Yeo, Jacinta F. White, Sarvesh Soni, Calum J. Drummond, Charlotte E. Conn
Summary: Mycobacterium tuberculosis (MTB) causes tuberculosis, a highly deadly infectious disease. Traditional drugs have difficulty targeting intracellular MTB, leading to multidrug resistance. This study showed that cationic cubosomes can effectively deliver the antitubercular drug rifampicin (RIF), reducing its minimum inhibitory concentration and shortening the lifecycle of MTB. The delivery system was also effective against intracellular MTB within human macrophages.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Xuying Li, Haoxin Mai, Nicholas Cox, Junlin Lu, Xiaoming Wen, Dehong Chen, Rachel A. Caruso
Summary: The photocatalytic performance of all-inorganic halide perovskites as photocatalysts for selective aromatic C(sp3)-H bond activation can be enhanced by introducing Sb dopant and forming heterointerface and staggered band structure. The developed Sb-substituted Cs2AgBiBr6/g-C3N4 composite exhibits significantly improved visible light photocatalytic toluene oxidation rate with high selectivity. The development of all-inorganic lead-free halide perovskite-based heterostructures for visible light photocatalytic organic transformations is expected to have wide-reaching application.
CHEMISTRY OF MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Yunkai Xu, Xing Zhou, Zhengfei Chen, Yang Hou, Ya You, Jun Lu
Summary: Researchers are focusing on aqueous batteries due to their advantages in safety and affordability. However, these batteries have low energy density. To overcome this limitation, efforts have been made to reformulate the aqueous electrolyte, but success is unlikely without understanding the relationship between electrolyte properties and electrochemical performance. This study discusses the impact of different zinc ion battery electrolyte compositions on electrochemical performance, providing electrolyte designing strategies for batteries with different purposes.
Article
Chemistry, Multidisciplinary
Haitao Yu, Angelina Angelova, Borislav Angelov, Brendan Dyett, Lauren Matthews, Yiran Zhang, Mohamad El Mohamad, Xudong Cai, Sepideh Valimehr, Calum J. Drummond, Jiali Zhai
Summary: This study provides important insights into the role of ionisable amino-lipids in the encapsulation and release of RNA in lipid nanoparticles for COVID-19 vaccines. The structural transitions and formation kinetics of ionisable lipids are revealed, which can help optimize the design of lipid nanoparticles for efficient RNA delivery.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Energy & Fuels
Shiqiang Huang, Zhendong Li, Zixuan Liu, Qinghui Yan, Bingyan Ma, Deyu Wang, Feng Wei, Zhengfei Chen, Haiyong He
Summary: The redox reactions of cobalt porphyrine derivatives in Li-air battery are controlled by adsorption on the cathode surface rather than diffusion. The side substituent groups of the porphyrine derivatives significantly influence their adsorbability and cell cyclability. Among them, cobalt tetramethoxyphenyl porphyrin has the highest adsorbability and the ability to decompose Li2CO3, enabling the Li-air cell to operate for 200 cycles under certain conditions even without a solid-state electrolyte membrane to suppress redox mediator shuttling and deactivation.
Article
Chemistry, Physical
Qi Han, Yuyu Su, Kate M. Smith, Jack Binns, Calum J. Drummond, Connie Darmanin, Tamar L. Greaves
Summary: Ions play an important role in modulating protein properties, and ionic liquids (ILs) have the potential to control protein properties through specific ion binding. This study investigates the specific ion binding effect of ILs on the behavior of lysozyme protein, including phase behavior, activity, size, conformational change, aggregation, and intermolecular interactions. The results provide new insights into protein-IL binding interactions and the use of ILs to modulate protein properties.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Physical
Qi Han, Mohamad El Mohamad, Stuart Brown, Jiali Zhai, Carlos J. Rosado, Yi Shen, Ewan W. Blanch, Calum J. Drummond, Tamar L. Greaves
Summary: Ionic liquids have a substantial effect on the structure and aggregation of globular proteins, and different concentrations and types of ILs can induce changes in protein structure and aggregation.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Materials Science, Biomaterials
Saffron J. Bryant, Aaron Elbourne, Tamar L. Greaves, Gary Bryant
Summary: Deep eutectic solvents (DES) are customizable non-aqueous solvents with potential applications in various fields, including industrial dissolution and biomedicine. They have the ability to self-assemble amphiphilic molecules into liquid crystal phases, which can be utilized in drug delivery systems. This study investigated the self-assembly of a non-ionic lipid, phytantriol, in the DES choline chloride:urea with and without water. The results showed that the DES supported diverse phase behavior and the addition of water influenced the phase transition temperatures.
JOURNAL OF MATERIALS CHEMISTRY B
(2023)
Article
Chemistry, Physical
Sue Lyn Yap, Haitao Yu, Shiyao Li, Calum J. Drummond, Charlotte E. Conn, Nhiem Tran
Summary: Cubosomes exhibit superior cellular uptake compared to other LLCNPs, while non-lamellar LLCNPs show significantly higher cellular interactions compared to liposomes.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2024)
Article
Chemistry, Multidisciplinary
Yayun Zheng, Yuefo Yi, Ziyi Yang, Wenbin Zhou, Yichao Wang, Zhengfei Chen
Summary: A crystalline Ti2O1.3(PO4)(1.6)/TiO2 carbon-coated composite was successfully synthesized using a glucose-modified hydrothermal method. Compared to the counterpart prepared without glucose modification, this composite exhibits the highest reversible capacities, excellent rate properties, and remarkable cycling performances, with a capacity of 233.9 mA h g(-1) maintained after 200 cycles at 1000 mA g(-1).
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Sergey Yu. Ketkov, Sheng-Yuan Tzeng, Elena A. Rychagova, Anton N. Lukoyanov, Wen-Bih Tzeng
Summary: Metallocenes, including methylcobaltocene, play important roles in various fields of chemistry. The ionization energy and vibrational structure of (Cp ')(Cp)Co can be influenced by introducing methyl substituents. The mass-analyzed threshold ionization spectrum and DFT calculations provide accurate information about the properties and transformations of (Cp ')(Cp)Co.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Review
Chemistry, Physical
Qifeng Mu, Jian Hu
Summary: Polymer mechanochemistry has experienced a renaissance due to the rapid development of mechanophores and principles governing mechanochemical transduction or material strengthening. It has not only provided fundamental guidelines for converting mechanical energy into chemical output, but also found applications in engineering and smart devices.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Da Hye Yang, Francesco Ricci, Fredrik L. Nordstrom, Na Li
Summary: Through systematic evaluation of the oiling-out behavior of procaine, we identified both stable and metastable liquid-liquid phase separation, and established phase diagrams to assist in rational selection of crystallization strategies.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Vikki Anand Varma, Simmie Jaglan, Mohd Yasir Khan, Sujin B. Babu
Summary: Designing engineering structures like nanocages, shells, and containers through self-assembly of colloids is a challenging problem. This work proposes a simple model for the subunit, which leads to the formation of monodispersed spherical cages or containers. The model with only one control parameter can be used to design cages with the desired radius.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Hainan Jiang, Yaolong He, Xiaolin Li, Zhiyao Jin, Huijie Yu, Dawei Li
Summary: The cycling lifespan and coulombic efficiency of lithium-ion batteries are crucial for high C-rate applications. The Li-ion concentration plays a crucial role in determining the mechanical integrity and structural stability of electrodes. This study focuses on graphite as the working electrode and establishes an experimental system to investigate the mechanical properties of composite graphite electrode at different C-rates. Considering the effect of Li-ion concentration in stress analysis is found to be significant.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Zhiye Wang, Yunchuan Li, Mingjun Sun
Summary: This study investigates the influence of intramolecular pi-pi interactions on the electronic transport capabilities of molecules. By designing and analyzing three pi-conjugated molecules, the researchers observe that different pi-conjugated structures have varying effects on electron transport. The findings provide a theoretical foundation for designing single-molecule electronic devices with multiple electron channels based on intramolecular pi-pi interactions.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Yuandong Xu, Haoyang Feng, Chaoyang Dong, Yuqing Yang, Meng Zhou, Yajun Wei, Hui Guo, Yaqing Wei, Jishan Su, Yingying Ben, Xia Zhang
Summary: Hollow MoS2 cubes and spheres were successfully synthesized using a one-step hydrothermal method with the hard template method. The hollow MoS2 cubes exhibited higher specific capacitance and energy density compared to the hollow MoS2 spheres. The symmetrical supercapacitors assembled with these hollow structures showed good performance and high capacity retention after multiple cycles. These findings suggest that controlling the pore structure and surface characteristics of MoS2 is crucial for enhancing its electrochemical properties.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Ainhoa Oliden-Sanchez, Rebeca Sola-Llano, Joaquin Perez-Pariente, Luis Gomez-Hortiguela, Virginia Martinez-Martinez
Summary: The combination of photoactive molecules and inorganic structures is important for the development of advanced materials in optics. In this study, bulky dyes were successfully encapsulated in a zeolitic framework, resulting in emission throughout the visible spectrum.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Miaomiao Zhang, Cunyuan Pei, Qiqi Xiang, Lintao Liu, Zhongxu Dai, Huijuan Ma, Shibing Ni
Summary: The design of a solid electrolyte interphase (SEI) plays a crucial role in improving the electrochemical performance of anode materials. In this study, lithium difluoro(oxalate)borate (LiDFOB) is used as an electrolyte additive to form a protective SEI film on Li3VO4 (LVO) anodes. The addition of LiDFOB results in a dense, uniform, stable, and LiF-richer SEI, which enhances the Li-ion storage kinetics. The generated SEI also prevents further decomposition of the electrolyte and maintains the morphology of LVO anodes during charge/discharge processes. This work demonstrates the effectiveness of LiDFOB as a multi-functional additive for LiPF6 electrolytes and provides insights into SEI construction for high-performance LVO anodes.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
B. V. Andryushechkin, T. V. Pavlova, V. M. Shevlyuga
Summary: The atomic structure of the Ag(111)-p(4 x 4)-O phase was reexamined and two phases with the same periodicity were discovered. It was demonstrated that the accepted Ag6 model is incompatible with high-resolution oxygen-sensitive STM images.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
S. L. Romo-Avila, D. Marquez-Ruiz, R. A. Guirado-Lopez
Summary: In this study, we used density functional theory (DFT) calculations to investigate the interaction between model graphene oxide (GO) nanostructures and chlorine monoxide ClO. We aimed to understand the role of this highly oxidizing species in breaking C-C bonds and forming significant holes on GO sheets. Our results showed that C-C bonds in a single graphene oxide sheet can be broken through a simple mechanism involving the dissociation of two chemically attached ClO molecules. The formation of carbonyl groups and holes on the GO surface was also observed. This study provides important insights into the degradation of carbon nanotubes and the stability of GO during the myeloperoxidase (MPO) catalytic cycle.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Alberto Garcia-Fernandez, Birgit Kammlander, Stefania Riva, Hakan Rensmo, Ute B. Cappel
Summary: In this study, the X-ray stability of five different lead halide perovskite compositions (MAPbI3, MAPbCl3, MAPbBr3, FAPbBr3, CsPbBr3) was investigated using photoelectron spectroscopy. Different degradation mechanisms and resistance to X-ray were observed depending on the crystal composition. Overall, perovskite compositions based on the MA+ cation were found to be less stable than those based on FA+ or Cs+. Metallic lead formation was most easily observed in the chloride perovskite, followed by bromide, and very little in MAPbI3. Multiple degradation processes were identified for the bromide compositions, including ion migration, formation of volatile and solid products, as well as metallic lead. CsBr was formed as a solid degradation product on the surface of CsPbBr3.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Timofei Rostilov, Vadim Ziborov, Alexander Dolgoborodov, Mikhail Kuskov
Summary: The shock-loading behavior of nanomaterials is investigated in this study. It is found that shock compaction waves exhibit a distinct two-step structure, with the formation of faster precursor waves that travel ahead of the main compaction waves. The complexity of the shock Hugoniot curve of the tested nanomaterial is described, and the effect of initial porosity on the compressed states is demonstrated.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Sergey S. Nikitin, Alexander D. Koryakov, Elizaveta A. Antipinskaya, Alexey A. Markov, Mikhail V. Patrakeev
Summary: The stability of La1/3Sr2/3Fe1-xMnxO3-delta, a perovskite-type oxide, under reducing conditions is dependent on the manganese content. Increasing the manganese content leads to a decrease in stability. The behavior of iron and manganese in the oxide shows distinct differences, which can be attributed to the difference in the enthalpy of oxidation reactions. Additionally, the change in the La/Sr ratio affects the concentration of iron and manganese ions.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Mosayeb Naseri, Shirin Amirian, Mehrdad Faraji, Mohammad Abdur Rashid, Maicon Pierre Lourenco, Venkataraman Thangadurai, D. R. Salahub
Summary: Inspired by the successful transfer of freestanding ultrathin films of SrTiO3 and BiFeO3, this study assessed the structural stability and investigated the electronic, optical, and thermoelectric properties of a group of two-dimensional perovskite-type materials called perovskenes. The findings revealed that these materials are wide bandgap semiconductors with potential application in UV shielding. Moreover, they exhibit better electrical and thermal conductivity at high temperatures, enabling efficient power generation in thermoelectric devices.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)