Article
Chemistry, Multidisciplinary
Albert Dautov, Kotstantin Kotlyar, Denis Butusov, Ivan Novikov, Aliya Khafizova, Artur Karimov
Summary: This work investigates the synthesis of AlF(3) and one-dimensional structures based on AlF(3) through the reaction of initial aluminum with aqueous hydrofluoric acid solution. The morphology and surface of the obtained samples are analyzed using scanning electron microscopy and atomic force microscopy. Whiskers of one-dimensional structures are synthesized under the given conditions. Quantitative energy-dispersive X-ray spectroscopy is used for analysis.
Article
Chemistry, Multidisciplinary
Valentine Camus-Genot, Amandine Guiet, Jerome Lhoste, Franck Fayon, Monique Body, Stephanie Kodjikian, Romain Moury, Marc Leblanc, Jean Louis Bobet, Christophe Legein, Vincent Maisonneuve
Summary: In this study, beta-AlF3-x(OH)(x) nanoparticles with very high specific surface area were synthesized using a microwave-assisted solvothermal process, where the nature of the solvent was found to have the greatest impact on the morphology and surface area. The nanoparticles exhibited a range of SSAs and OH contents, with the highest SSA sample showing potential for hydrogen storage applications.
CRYSTAL GROWTH & DESIGN
(2021)
Article
Chemistry, Multidisciplinary
Abdelsalam Rawashdeh, Aaron Wildenborg, Eric Liu, Zhi Gao, David A. Czaplewski, Hongwei Qu, Jae Yong Suh, Ankun Yang
Summary: Researchers have developed a scalable method for fabricating sodium (Na) nanostructures with ultralow optical loss and tunable surface plasmon polariton (SPP) modes spanning visible to NIR. They have also addressed the reactivity challenges of Na through a simple encapsulation strategy, enabling the stable existence of Na nanostructures for over two months. Sodium, as a low-cost and low-loss plasmonic material, offers a competitive option for nanophotonic devices and plasmon-enhanced applications.
Article
Nanoscience & Nanotechnology
Dan Wang, Zhijian Zhao, Bo Shi, Jie-Xin Wang, Jian-Feng Chen
Summary: The pyrolysis of MOFs is a widely used method to generate hierarchical structures with metal nanoparticles embedded in a porous carbon matrix. In this study, in situ environmental transmission electron microscopy was used to observe the real-time formation and evolution of porous carbon decorated with metal species during the pyrolysis of zeolitic imidazolate framework-67 encapsulated with carbon dots. The migration of cobalt, the flow of aggregates, and the growth of carbon nanotubes were observed at the nanoscale. Experimental studies revealed the synergistic effect between doped graphite nitrogen and confined cobalt nanoparticles for enhanced catalytic performance.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Inorganic & Nuclear
Wei Mao, Yanbo Bai, Zhaohua Jia, Yue Qin, Bo Wang, Wei Zhang, Jian Lu, Erhard Kemnitz
Summary: Nano AlF3 prepared by the ethylene glycol-mediated sol-gel process shows improved thermal stability compared to conventionally prepared HS-AlF3, but exhibits weaker acidity.
DALTON TRANSACTIONS
(2022)
Article
Materials Science, Ceramics
Hoora Kaspoor, Ahmad Reza Abbasian, Mahdi Shafiee Afarani
Summary: Nano/mesoporous Li2TiO3 powders were synthesized using a solution combustion method with citric acid as fuel. The effects of nitric acid and NaCl addition on the powders' properties were studied. The results showed that the addition of nitric acid improved combustion reaction, while adding NaCl significantly increased the specific surface area of the powders.
CERAMICS INTERNATIONAL
(2022)
Article
Nanoscience & Nanotechnology
Satoshi Ishii, Makoto Higashino, Shinya Goya, Evgeniy Shkondin, Katsuhisa Tanaka, Tadaaki Nagao, Osamu Takayama, Shunsuke Murai
Summary: High-aspect-ratio TiN nanostructures with subwavelength periodicities have been shown to significantly increase photothermal temperature, attributed to their extremely anisotropic effective thermal conductivities. These nanostructures could potentially be applied in various fields, such as solar heating, chemical reactions, and microfluidics.
Article
Chemistry, Multidisciplinary
Meng Li, Matthew T. Curnan, Wissam A. Saidi, Judith C. Yang
Summary: Understanding the influence of defects on oxidation is crucial for the applications of nano-oxides in catalysis, electronics, and corrosion. This study investigates the uneven surface oxidation induced by surface steps on copper materials using atomic-scale in situ environmental transmission electron microscopy experiments. The results provide mechanistic explanations for the observed formation site preferences, which vary with surface orientation and oxygen concentration, based on Ehrlich-Schwobel barrier differences for oxygen diffusion on stepped surfaces.
Article
Engineering, Environmental
Kai Zhang, Yishu Xu, Yu Li, Yang Liu, Bowen Wang, Huakun Wang, Jingjing Ma, Xiaobei Cheng
Summary: The morphological characteristics and nanostructure of soot particles in pure n-heptane and n-heptane/ammonia co-flow diffusion flames were analyzed and compared. It was found that the addition of ammonia resulted in a decrease in the size of primary soot particles and soot aggregates, and a lower fractal dimension of soot aggregates. The introduction of ammonia also led to a more disordered microcrystal structure and higher oxidation reactivity of soot particles.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Wei Li, Shaohua Zhang, Sjoerd J. Rijpkema, Daniela A. Wilson
Summary: The surface area of anisotropic polymeric assemblies is difficult to determine using traditional techniques. In this study, a molecular probe loading method is developed to measure the surface area of anisotropic polymersomes in different shapes. The method utilizes an amphiphilic molecular probe and correlates the surface area with the loading amount of probes. By measuring the loading amount, the surface area of anisotropic polymersomes can be successfully determined. This method has the potential to assist in real-time surface area characterization and customization of functions.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Review
Chemistry, Multidisciplinary
Yew Von Lim, Xue Liang Li, Hui Ying Yang
Summary: The paper summarizes effective strategies to reduce the performance shortcomings of materials, with a focus on metal sulfides as high-performance electrode materials for SIBs. In the future, the development of highly functional SIBs electrode materials and the utilization of metal sulfides will become increasingly relevant.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Engineering, Chemical
N. B. Pradeep, M. M. Rajath Hegde, Shashanka Rajendrachari, A. O. Surendranathan
Summary: Nanostructured TiMgSr alloy with small crystallite size and low lattice strain was synthesized using ball milling, cold compaction, and microwave sintering. The alloy exhibited suitable densification and elastic modulus for biomedical applications.
Review
Chemistry, Physical
Lidong Sun, Yu Li, Wei Feng
Summary: This review discusses the potential and advantages of conversion-type metal fluorides as cathode materials for next-generation rechargeable batteries, as well as the issues and solutions, providing guidance for the development of MF cathode-based batteries.
Article
Energy & Fuels
Zhe Li, Zheng-Hua He, Jing-Feng Hou, Jian-Fei Gao, Ling-Bin Kong
Summary: Exploring better electrochemical energy storage devices is a great challenge. The synthesized cubic-phase perovskite fluoride KMnF3 shows high specific capacity and fast pseudocapacitive control dynamics in half cell, and when assembled with activated carbon, it exhibits high energy density, high power density, and long cycle life in lithium-ion capacitors.
Article
Materials Science, Multidisciplinary
Samuel J. Baxter, Jose Mendez-Arroyo, Jim Enterkin, Paul M. Alvey, Camille May, Clay Cox, Jianhua Yao
Summary: The highly porous and crystalline nature of MOFs has attracted attention for various applications in the energy industry. They have modular structures that allow modification of molecular and microstructural properties. This paper presents a thermal stability analysis of ligand-substituted MOF-808 derivatives, identifying the effects of structural changes on thermal cycling stability. The results show significant negative thermal expansion in MOF-808-SO4, suggesting that targeted ligand modifications can greatly impact the thermal stability and expansion of MOFs.
ACS MATERIALS LETTERS
(2022)
Article
Physics, Applied
Oana Condurache, Goran Drazic, Naonori Sakamoto, Tadej Rojac, Andreja Bencan
Summary: The dynamics of domain walls (DWs) during polarization switching greatly influence the electromechanical response of ferroelectrics. A comparative study of uncharged and tail-to-tail charged DWs in BiFeO3 ceramics reveals differences in strain and structure, with uncharged DWs exhibiting higher and more concentrated strain compared to charged DWs. Regardless of their charge state, all types of DWs show a similar amount of Bi-vacancies segregation.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Chemistry, Inorganic & Nuclear
Evelin Gruden, Gasper Tavcar
Summary: The use of aldiminium-based triflate and chloride salts as group transfer reagents with N-heterocyclic carbene and alane led to the formation of novel compounds, demonstrating their suitability in alane chemistry. The results included the first structurally characterized aluminum dihydride triflate compound and the first (trifluoromethanesulfonyl)oxyalane NHC adduct, as well as mixed products co-crystallized in a specific form.
Article
Physics, Applied
Tony Schenk, Andreja Bencan, Goran Drazic, Oana Condurache, Nathalie Valle, Brahime El Adib, Naveen Aruchamy, Torsten Granzow, Emmanuel Defay, Sebastjan Glinsek
Summary: By shifting the grain growth regime towards heterogeneous nucleation and using a dilute solution with annealing steps, significant improvements in ferroelectric properties and breakdown voltage of La:HfO2 thin films were achieved. X-ray reflectivity revealed density superstructure in the film and highlighted the role of layered structure and chemical effects on ferroelectric performance.
APPLIED PHYSICS LETTERS
(2021)
Article
Materials Science, Ceramics
Alfredo Blazquez Martinez, Nicolas Godard, Naveen Aruchamy, Cosme Milesi-Brault, Oana Condurache, Andreja Bencan, Sebastjan Glinsek, Torsten Granzow
Summary: In this study, polycrystalline Mn and Ti co-doped BiFeO3 thin films were fabricated on platinized silicon substrates by a solution deposition method, with PbTiO3 nanocrystals used as a seed layer to induce a preferential (100) pseudocubic orientation. The introduction of a PbTiO3 seed layer significantly reduced the leakage current and resulted in excellent room-temperature ferroelectric properties in the thin films.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Chemistry, Inorganic & Nuclear
Evelin Gruden, Melita Tramsek, Gasper Tavcar
Summary: The reaction of alkylaluminum compounds with imidazolium-based fluorinating reagents resulted in the isolation of salts containing different fluoroaluminate anions. The products were characterized by NMR, Raman spectroscopy, and single-crystal X-ray diffraction, with their structures compared with DFT calculations.
Article
Chemistry, Physical
Brigita Kmet, Danjela Kuscer, Soma Dutta, Hana Ursic, Aleksander Matavz, Franck Levassort, Vid Bobnar, Barbara Malic, Andreja Bencan
Summary: This study investigates the impact of sintering in different atmospheres on the properties of KNN thin films, highlighting the benefits of using packing powder for achieving phase-pure films. Thick films sintered in oxygen exhibit promising piezoelectric properties and low mechanical losses, making them potential candidates for lead-free piezoelectric energy harvesting applications.
Article
Chemistry, Organic
Blaz Alic, Jan Petrovcic, Jan Jelen, Gasper Tavcar, Jernej Iskra
Summary: This study investigated the reactivity of three 1,3-diarylimidazolium-based fluoride reagents in fluorination reactions, highlighting the trifluoride [IPrH][F(HF)2] as the most selective and stable reagent for various organic substrates. The use of microwave-assisted activation and steric hindrance resulted in increased fluorination rates, showcasing the potential of [IPrH][F(HF)2] as an excellent reagent in organic synthesis.
JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Biochemistry & Molecular Biology
Sabi William Konsago, Katarina Ziberna, Brigita Kmet, Andreja Bencan, Hana Ursic, Barbara Malic
Summary: Chemical solution deposition using ethylene glycol as a solvent provides a viable alternative for the fabrication of BaTiO3 or BT-based thin films. The coating solutions are stable and the resulting films exhibit dense, crack-free microstructure with ferroelectric and piezoelectric properties.
Article
Materials Science, Multidisciplinary
Nicole Bein, Brigita Kmet, Tadej Rojac, Andreja Bencan Golob, Barbara Malic, Julian Moxter, Thorsten Schneider, Lovro Fulanovic, Maryam Azadeh, Till Froemling, Sonja Egert, Hongguang Wang, Peter van Aken, Jutta Schwarzkopf, Andreas Klein
Summary: The valence band maximum energy of NaNbO3 is determined and found comparable to SrTiO3 and BaTiO3, while the conduction band minimum is yet to be determined. In addition, Sr- and Ca-doped NaNbO3 ceramics exhibit low electrical conductivity.
PHYSICAL REVIEW MATERIALS
(2022)
Article
Chemistry, Inorganic & Nuclear
Melita Tramsek, Evgeny Goreshnik, Gasper Tavcar
Summary: This article reports a new coordination compound using a main group trivalent metal center and XeF2 as a ligand. The compound is stable and the same metal is present in two different oxidation states.
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE
(2022)
Article
Chemistry, Organic
Jan Jelen, Gasper Tavcar
Summary: In this study, a simple method for the synthesis of 2-chloro-1,3-bis-(2,6-diisopropylphenyl)-imidazolium salts in aqueous media using hypochlorite as a chlorinating agent was reported. Additionally, an air-stable and moisture-insensitive deoxyfluorination reagent based on poly-[hydrogen fluoride] salt was presented, which can convert electron-deficient phenols or aryl silyl ethers into corresponding aryl fluorides in the presence of DBU as a base, with high yields and good tolerance to functional groups.
Article
Crystallography
Katarina Ziberna, Matej Sadl, Aljaz Drnovsek, Goran Drazic, Hana Ursic, Andreja Bencan
Summary: The thermal treatment of electromechanically active thick films prepared by aerosol deposition (AD) is a common practice to improve their electrical and electromechanical properties. We studied the effects of post-deposition annealing on the unique cross-sectional microstructure and mechanical properties of 0.9Pb(Mg1/3Nb2/3)O-3-0.1PbTiO(3) thick films prepared by AD. Transmission electron microscopy revealed minor but detectable changes, such as pore redistribution and grain growth after annealing at 500 degrees C. We also demonstrated that the stainless-steel substrate is strongly influenced by the annealing. The hardness and Young's modulus of the films increased after annealing, and their distributions over the cross-sections of the films were discussed.
Article
Biochemistry & Molecular Biology
Evelin Gruden, Gasper Tavcar
Summary: The reactions between the CAAC-based trifluoride reagent and group 14 tetrafluorides and group 15 pentafluorides resulted in the isolation of salts containing discrete 5- or 6-coordinated fluoroanions. The synthesized compounds were characterized by X-ray single-crystal structure analysis, NMR, and Raman spectroscopy. Notably, [MeCAACH][GeF5] is a rare structurally characterized compound with a discrete [GeF5]- anion.
Article
Chemistry, Inorganic & Nuclear
Jan Gnidovec, Evelin Gruden, Melita Tramsek, Jernej Iskra, Jaroslav Kvicala, Gasper Tavcar
Summary: A new triphenyldifluorogermanate and various pentacoordinated organofluorosilicates were synthesized. The fluorogermane and fluorosilane compounds were obtained by halogen substitution with KF. Subsequent reaction with the imidazolium-based fluoride reagent [IPrH][F] led to the formation of [IPrH][Ph3SiF2], [IPrH][Ph2SiF3], [IPrH][Et2SiF3], [IPrH][PhSiF4], [IPrH][EtSiF4], and [IPrH][Ph3GeF2]. The products were characterized by NMR, Raman spectroscopy, and X-ray diffraction, and the results were supported by DFT calculations.
DALTON TRANSACTIONS
(2023)
Article
Materials Science, Multidisciplinary
Kevin Riess, Neamul H. Khansur, Alexander Martin, Andreja Bencan, Hana Ursic, Kyle G. Webber
Summary: Frequency-dependent macroscopic mechanical measurements of (Na1/2Bi1/2)TiO3 revealed the influence of electrical poling on relaxor-like behavior and the directional dependence of relative permittivity.
Article
Chemistry, Inorganic & Nuclear
Xianda Wu, Minghong Chen, Shuiyun Zheng, Fu-Sheng He, Jie Wu
Summary: Here, we report a new method for synthesizing sulfilimines through an iron-catalyzed reaction between sulfenamides and 2,2,2-trifluor-diazoethane. This protocol features operational simplicity, mild conditions, and can be conducted in open air, providing a facile approach to trifloromethylated sulfilimines in moderate to good yields.
JOURNAL OF FLUORINE CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Ita Hajdin, Romana Pajkert, Haibo Mei, Jianlin Han, Gerd-Volker Roeschenthaler
Summary: A catalyst- and solvent-free 1,3-dipolar cycloaddition reaction using a bench-stable diazo reagent has been developed to obtain a series of novel 3H-pyrazoles bearing difluoromethyl phosphonate unit in moderate-to-excellent yields. This method provides an efficient and easy route to synthesize valuable compounds.
JOURNAL OF FLUORINE CHEMISTRY
(2024)
