Article
Chemistry, Multidisciplinary
Yuhiro Segawa, Kenji Yamazaki, Jun Yamasaki, Kazutoshi Gohara
Summary: A new method for measuring the 3D atomic structure of free-standing graphene ripples using TEM is proposed and experimentally validated. The specimen in the experiment was found to be moving upward, and the ripple was approximated as a composite of sinusoidal waves while measuring the time dependence of its height and lateral size.
Review
Materials Science, Multidisciplinary
Knut W. Urban, Juri Barthel, Lothar Houben, Chun-Lin Jia, Lei Jin, Markus Lentzen, Shao-Bo Mi, Andreas Thust, Karsten Tillmann
Summary: Transmission electron microscopy is a crucial tool for studying the structure and properties of materials at atomic resolution. It allows for high spatial resolution and enables the correlation between microstructure and macroscopic properties. With the development of aberration-corrected electron optics, it became possible to perform picometer-scale measurements and chemical analyses. This paper aims to introduce this new type of electron microscopy, discuss its implications, applications, and limitations in materials science, and provide access to relevant literature.
PROGRESS IN MATERIALS SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Leonard Desvignes, Vasily S. Stolyarov, Marco Aprili, Freek Massee
Summary: The text highlights the importance of manipulating individual atoms and molecules using a scanning tunneling microscope for the development of atomic-scale devices and structures, particularly molecular motors. It also introduces the controlled manipulation of a rotor in Fe doped Bi2Se3, where current into the rotor is finely tuned with voltage to achieve directional switching.
Article
Chemistry, Inorganic & Nuclear
Gao Wu, Qiao-Ling Mo, Yang Xiao, Kun Wang, Xing-Zu Ge, Shu-Ran Xu, Jia-Le Li, Yan-Qun Shao, Fang-Xing Xiao
Summary: This study investigates the charge transfer characteristics of BiVO4 photoanode sensitized by alloy metal nanoclusters (NCs). It is found that doping silver atoms can stabilize the alloy AuAg NCs and sensitize the BiVO4 photoanode, significantly enhancing the photoelectrochemical (PEC) water oxidation performances.
INORGANIC CHEMISTRY
(2023)
Article
Engineering, Chemical
A. Maisser, K. Barmpounis, S. Holm, M. Attoui, A. Schmidt-Ott, J. Kangasluoma, G. Biskos
Summary: This study demonstrates the potential of using atmospheric-pressure spark ablation to produce silver and gold clusters in argon gas, and analyze their chemical composition using atmospheric pressure interface time-of-flight mass spectrometer. The experimental results show that the reactivity towards oxygen and water traces varies depending on the number of metal atoms, polarity, and compositions of the clusters. The low cost of the technique makes it promising for various technological applications.
JOURNAL OF AEROSOL SCIENCE
(2021)
Article
Chemistry, Physical
William R. Jeffries, Christine M. Aikens, Kenneth L. Knappenberger Jr
Summary: This study investigates the electronic relaxation dynamics of gold nanoclusters and emphasizes the importance of electronic state symmetry in determining the relaxation pathways. The results reveal the surprising influence of excited state symmetry on carrier relaxation in metal colloids, providing insights for controlling energy flow in metal nanoclusters.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Shun Ito, Kiichirou Koyasu, Shinjiro Takano, Tatsuya Tsukuda
Summary: The stabilizing role of alkynyl ligands with electron-withdrawing CF3 substituents in metal clusters was investigated through gas-phase anion photoelectron spectroscopy (PES) on heteroleptic cluster anions. The study revealed that electron binding energies decreased linearly with specific x values, showing the critical function of electron-withdrawing CF3 substituents on alkynyl ligands in the electronic stabilization of metal clusters. Density functional theory calculations supported the experimental findings and explained the ligand effect through a mechanism similar to the modulation of the work function of gold films by organic monolayers.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Manoj Settem, Riccardo Ferrando, Alberto Giacomello
Summary: A computational approach combining PTMD simulations, HSA calculations, and global optimization searches is developed to determine the equilibrium structures of Au nanoclusters across different temperatures. The study reveals the temperature-dependent structural motifs in nanoclusters of various sizes, showing a competition between global energy minimum and other motifs. The results indicate good agreement between PTMD and HSA at intermediate temperatures, with PTMD providing accurate descriptions of equilibrium at higher temperatures and HSA being more efficient at capturing low-temperature structural transitions.
Article
Chemistry, Physical
Mario Scholze, Martin F. -X. Wagner, Dagmar Dietrich, Cagatay Elibol, Sebastian Fritsch, Christian Illgen, Benjamin Bohne, Marcus Boehme, Damien Colas, Philipp Frint
Summary: The ability to modify microstructural features and properties make red gold an attractive choice for applications in electronics, dental devices, and jewelry. This study investigates the effect of severe plastic deformation by equal-channel angular pressing (ECAP) on microstructural evolution in an 18-carat AuCuAg alloy and the ordering kinetics during subsequent aging. The results demonstrate the potential of ECAP combined with heat treatments for microstructural optimization of AuCuAg alloys and their applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Kristen A. Fichthorn, Tianyu Yan
Summary: Metal nanocrystals are crucial in current technologies and will continue to be important in future applications. Shape control is essential for the beneficial properties of nanocrystals, and progress in understanding the shapes of monometallic nanocrystal seeds has been made through experimental and theoretical research. Exciting prospects lie ahead with new applications, advances in electron microscopy, and theoretical developments in quantum and statistical mechanics.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Multidisciplinary
Andra C. Dumitru, Amaury Stommen, Melanie Koehler, Anne-Sophie Cloos, Jinsung Yang, Arnaud Leclercqz, Donatienne Tyteca, David Alsteens
Summary: Recent studies have shown that PIEZO1 ion channels are activated by mechanical stimuli, triggering intracellular chemical signals, and their gating and activation are modulated by plasma membrane tension or local curvature changes. The research found the existence of submicrometric PIEZO1 clusters on red blood cells, and these clusters increase in abundance in regions of higher membrane tension and lower curvature upon interaction with the allosteric modulator Yodal. Additionally, it was demonstrated that PIEZO1 ion channels interact with the spectrin cytoskeleton in both resting and activated states, suggesting a strong interplay between plasma membrane tension gradients, curvature, and cytoskeleton association of PIEZO1.
Article
Astronomy & Astrophysics
Terese T. Hansen, Alexander P. Ji, Gary S. Da Costa, Ting S. Li, Andrew R. Casey, Andrew B. Pace, Lara R. Cullinane, Denis Erkal, Sergey E. Koposov, Kyler Kuehn, Geraint F. Lewis, Dougal Mackey, Jeffrey D. Simpson, Nora Shipp, Daniel B. Zucker, Joss Bland-Hawthorn
Summary: The recently discovered Indus stellar stream shows a diverse chemical signature, with outlier stars Indus_0 displaying characteristics of a globular cluster and Indus_13 exhibiting extreme enhancement in rapid neutron-capture elements, providing evidence of its accreted nature.
ASTROPHYSICAL JOURNAL
(2021)
Review
Electrochemistry
Guangzhao Mao, Mohamed Kilani, Mostak Ahmed
Summary: This paper reviews nucleation and early-stage crystal growth activated by an electrical pulse at microelectrodes and nanoelectrodes. Various methods to make microelectrodes and nanoelectrodes are described. The article highlights the potential applications of electrochemically fabricated nanosensor arrays in medical diagnostics, environmental monitoring, and renewable energy.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Microscopy
M. Watanabe, R. F. Egerton
Summary: X-ray analysis is a robust method for extracting quantitative information from materials. Recent advancements in aberration-correction technology in scanning transmission electron microscopes and the use of silicon drift detectors have enabled atomic-resolution X-ray analysis.
Article
Chemistry, Multidisciplinary
Shinjiro Takano, Tatsuya Tsukuda
Summary: This article discusses the characteristics and potential applications of clusters of pure and doped gold/silver protected by organic ligands as novel functional materials. By proposing empirical guiding principles for electronic structures, as well as design guidelines for functionalities and processes of hydride-mediated transformation, we can overcome the challenges of exploring new materials and develop more efficient, targeted synthesis methods.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Multidisciplinary
Paul A. Advincula, Jacob L. Beckham, Chi Hun Choi, Weiyin Chen, Yimo Han, Dmitry Kosynkin, Alexander Lathem, Alvaro Mayoral, Miguel Jose Yacaman, James M. Tour
Summary: We demonstrate the synthesis of a solvent- and gas-free 2D carbon nanotube/graphene network through flash Joule heating of pristine carbon nanotubes. The proportion of each morphology in the hybrid material can be controlled by varying the pulse time. Epoxy composites made with the hybrid material show significantly increased hardness and Young's modulus compared to neat epoxy, indicating that flash Joule heating can effectively convert carbon nanotubes into a hybrid network for reinforcement.
Article
Engineering, Environmental
Juan J. Mercadal, Alvaro Mayoral, Jose Luis G. Fierrod, Enrique Garcia-Bordeje, Ignacio Melian-Cabrera
Summary: By purifying the raw SWCNT in one step, lowering the MeOx concentration and generating surface C=O groups, the catalytic performance of SWCNT in the oxidative dehydrogenation of ethylbenzene was significantly improved. The textural improvement and MeOx removal contributed to the enhancement of EB conversion, ST selectivity, and reduction of COx selectivity.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Crystallography
Guillermo Barcena-Gonzalez, Andrei Hernandez-Robles, Alvaro Mayoral, Lidia Martinez, Yves Huttel, Pedro L. Galindo, Arturo Ponce
Summary: Electron backscattering diffraction analyzes crystalline phases at large scales, while precession electron diffraction obtains 4D-STEM data for nanometric structure elucidation. Both techniques have limitations due to probe size and complexity of image acquisition. Advanced machine learning techniques, such as deep learning, can overcome these limitations. This research demonstrates how Gabor filters can effectively extract features from electron microscopy images, reducing the need for large training datasets. The combination of Gabor filters and unsupervised learning enables particle segmentation and crystal orientation mapping at atomic scale.
CRYSTAL RESEARCH AND TECHNOLOGY
(2023)
Article
Environmental Sciences
Yawen Xiao, Ahmed S. Helal, Eva Mazario, Alvaro Mayoral, Alexandre Chevillot-Biraud, Philippe Decorse, Remi Losno, Francois Maurel, Souad Ammar, John S. Lomas, Miryana Hemadi
Summary: In this study, Maghemite (gamma-Fe2O3) nanoparticles were functionalized with 3-aminopropyltriethoxysilane (APTES) and reacted with diethylenetriamine-pentaacetic acid (DTPA) to obtain a nanohybrid adsorbent DAMNP. The DAMNP showed high adsorption capacity and selectivity for uranyl ions, making it a promising candidate for recovering uranium from nuclear wastewaters.
ENVIRONMENTAL RESEARCH
(2023)
Article
Chemistry, Physical
Juan A. de la Rosa Abad, Eduardo M. Bringa, Sergio J. Mejia-Rosales, Marcelo M. Mariscal
Summary: In this study, the nanoindentation behavior of spherical NiCo nanoalloys with core-shell and random mixing patterns was investigated. The impact of the elemental distribution and proportion on the mechanical response was compared against monometallic nanoparticles. It was found that plastic deformation originated from the nucleation of Shockley partial dislocations (SPDs) on the surface of the nanoparticles, regardless of the mixing patterns. The presence of Co in the external shell was observed to increase the yield strength.
FARADAY DISCUSSIONS
(2023)
Editorial Material
Chemistry, Physical
Damien Alloyeau, Vincenzo Amendola, Catherine Amiens, Pascal Andreazza, Joost M. Bakker, Francesca Baletto, Stephan Barcikowski, Noelia Barrabes, Michael Bowker, Fuyi Chen, Emmanuel Cottancin, Wolfgang E. Ernst, Riccardo Ferrando, Georg Daniel Forster, Alessandro Fortunelli, Didier Grandjean, Hazar Guesmi, Graham J. Hutchings, Ewald Janssens, Miguel Jose Yacaman, Christian Kuttner, Lebohang Macheli, Eric Marceau, Marcelo M. Mariscal, Jette K. Mathiesen, John McGrady, Christine Mottet, Diana Nelli, Pinkie Ntola, Cameron J. Owen, Micha Polak, Jonathan Quinson, Cesare Roncaglia, Leonid Rubinovich, Rolf Schafer, Manoj Settem, Jeff Shield, Mzamo Shozi, Swathi Swaminathan, Stefan Vajda, Hans-Christian Weissker
FARADAY DISCUSSIONS
(2023)
Article
Chemistry, Physical
Gabriel J. J. Olguin-Orellana, German J. Soldano, Jans Alzate-Morales, Maria B. Camarada, Marcelo M. M. Mariscal
Summary: Copper nanofluids (Cu NFs) have high thermal conductivity but are prone to oxidation, corrosion, and aggregation. Copper capped by graphene (Cu@G) nanoparticles can shield Cu NPs and exhibit improved thermal conductivity compared to Cu NFs. New Morse potentials were used to simulate the behavior of Cu@G NPs, and their thermal conductivity was evaluated using the Green-Kubo formalism, showing significant improvement compared to Cu NFs.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Multidisciplinary Sciences
Jian Li, Zihao Rei Gao, Qing-Fang Lin, Chenxu Liu, Fangxin Gao, Cong Lin, Siyao Zhang, Hua Deng, Alvaro Mayoral, Wei Fan, Song Luo, Xiaobo Chen, Hong He, Miguel A. Camblor, Fei-Jian Chen, Jihong Yu
Summary: ZEO-3 is a highly stable pure silica zeolite with a multidimensional, interconnected system of extra-large pores open through windows made by 16 and 14 silicate tetrahedra. It has a higher specific surface area compared to other zeolites and metal-organic frameworks, and exhibits excellent performance for volatile organic compound abatement and recovery.
Article
Chemistry, Multidisciplinary
Chengmin Li, Junyan Li, Yi Zhou, Qing Zhang, Alvaro Mayoral, Gang Li, Osamu Terasaki
Summary: A precise investigation of NbO has been conducted using advanced electron microscopy combined with powder and single crystal X-ray diffraction. It has been found that electron beams induced a structural transition, resulting in a final structure with different space group and atomic positions. Antiphase planar defects were observed in the pristine NbO and were related to the structural transformation. Theoretical calculations using density functional theory supported the experimental conclusions.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Zhuoya Dong, Enci Zhang, Yilan Jiang, Alvaro Mayoral, Qing Zhang, Yanhang Ma, Huaidong Jiang
Summary: In this study, electron ptychography was used to directly observe the local structures of two zeolites, Na-LTA and ZSM-5. The framework atoms and extra-framework cations were successfully imaged. This approach provides a new way to locally image zeolite structures and is important for further studying and tuning zeolite active sites at the atomic level.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Rafael Delgado, Carlos Marquez-Alvarez, Alvaro Mayoral, Ramon de la Serna, Javier Agundez, Joaquin Perez-Pariente
Summary: Gold nanospecies immobilized on functionalized mesoporous silica were tested as catalysts for cyclohexene oxidation. The materials were compared with previously reported ones functionalized during synthesis. Catalytic tests under different conditions were carried out and the samples were characterized by various techniques. The catalysts showed lower activity than those supported on S-bearing SBA-15 functionalized in situ due to different ratios of gold to sulfur. The reaction was found to be photocatalyzed by in situ formed AuNPs under ambient illumination.
CHEMISTRY-SWITZERLAND
(2023)
Article
Chemistry, Physical
Anna Liutkova, Victor Drozhzhin, Jason M. J. J. Heinrichs, Valentin Jestl, Angelina Evtushkova, Brahim Mezari, Alvaro Mayoral, Nikolay Kosinov, Emiel J. M. Hensen
Summary: The selectivity of the methanol-to-hydrocarbons reaction can be modified by using alkaline earth metals to modify zeolite catalysts. Sr2+ was used as a catalyst and its higher atomic number facilitated characterization by scanning transmission electron microscopy and operando X-ray absorption spectroscopy. The presence of Sr2+ in the zeolite micropores during the reaction resulted in an increased adsorption of reactants compared to zeolites without Sr, explaining the increased propylene yield and lower deactivation rate.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Kingsley Christian Kemp, Alvaro Mayoral, Suk Bong Hong
Summary: In this study, zeolite intergrowths of RTH/ITE and MEL/MFI were synthesized using 2-isopropylimidazolium-based cations as organic structure-directing agents in concentrated fluoride media. The phase selectivity in the synthesis was found to depend on the concentration of OSDA cations, fluoride anions, and the type of OSDA used. Molecular modeling results suggest that the crystallization of intergrowth zeolites in fluoride media may be controlled kinetically. Cs-corrected STEM analysis revealed the existence of previously unobserved MEL-MFI intergrowth in crystals synthesized under specific conditions.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Ruxandra G. Chitac, Vladimir L. Zholobenko, Robin S. Fletcher, Emma Softley, Jonathan Bradley, Alvaro Mayoral, Alessandro Turrina, Paul A. Wright
Summary: The SWY-type aluminosilicate zeolite, STA-30, has been synthesized via different routes. It has been found that the synthesis conditions can greatly affect the crystal morphology, intracrystalline porosity, and silanol concentrations of STA-30. Samples templated by diDABCO-C8(2+) show hierarchical microporosity and higher pore volumes compared to other samples.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Multidisciplinary Sciences
Sergio Tatay, Sonia Martinez-Gimenez, Ana Rubio-Gaspar, Eloy Gomez-Oliveira, Javier Castells-Gil, Zhuoya Dong, Alvaro Mayoral, Neyvis Almora-Barrios, Natalia M. Padial, Carlos Marti-Gastaldo
Summary: Changing the perception of defects as imperfections in crystalline frameworks into correlated domains amenable to chemical control and targeted design offers opportunities for designing porous materials with superior performance. By using UiO-66 as an experimental platform, the authors explored the framework chemical space of defective materials and demonstrated the existence of correlated disorder.
NATURE COMMUNICATIONS
(2023)
Review
Chemistry, Multidisciplinary
Dan He, Yawen Li, Fuwen Zhao, Yuze Lin
Summary: High trap density in organic solar cells leads to localized charge carriers and reduced carrier lifetime, limiting device efficiency. This feature article summarizes the recent advances of trap suppression by material design and device engineering.
CHEMICAL COMMUNICATIONS
(2024)
Review
Chemistry, Multidisciplinary
Olivier Monfort, Arshitha Madhusudhan, Martin Motola
Summary: This article presents the advantages of coupling photocatalysis and Fenton-based processes for environmental remediation and discusses their synergy. It critically examines the simultaneous triggering of these two processes and provides insights into research approaches. The study aims to enhance understanding of this complex process and highlight the potential integration of new catalysts in current wastewater treatment technology.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Manideepa Dhar, Chittaranjan Mishra, Avijit Das, Uttam Manna
Summary: An approach of 'polymerization of monomers in its aggregated form' has been introduced to tailor the water wettability of fibrous and porous substrates, achieving hydrophobicity to superhydrophobicity transition, as well as patterned wettability. This facile chemical method provides a durable coating with adjustable and patterned wettability for various potential applications.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Saswat Ranjan Bhoi, Chhanda Debnath, Shikha Gandhi
Summary: In this article, a novel catalytic reaction using Pd(0) and Bronsted acid is reported for the synthesis of biologically important imidazolidinone-fused N-heterocycles through redox-neutral intramolecular N-allylation of indoles and pyrroles with alkynes. This atom-economical method is applicable to a wide range of substrates and eliminates the need for leaving groups or oxidizing agents commonly used in traditional allylation reactions.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Longkun Chen, Mingshuai Zhang, Meichen Liu, Zhuoyuan Liu, Yuetong Qiu, Zhilai Zhang, Fuchao Yu, Jiuzhong Huang
Summary: In this study, an efficient Rh(III)-catalyzed selective mono- and dual-C-H bond functionalization/cyclization with iodonium ylide as the sole coupling partner was demonstrated. Fused benzodiazepine skeletons were obtained in excellent yields, providing an improved approach to dual C-H unsymmetrical functionalization.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Alice Kennett, Sven Epple, Gabriella van der Valk, Irene Georgiou, Evelyne Gout, Romain R. Vives, Angela J. Russell
Summary: This study presents the design and synthesis of sulfated disaccharide inhibitors based on IdoA(2S)-GlcNS(6S), which showed potent inhibition of Sulf-2. The results suggest that IdoA(2S)-GlcNS(6S) is the shortest fragment size required for effective inhibition of Sulfs, and a trisulfated disaccharide is identified as the minimal fragment size of heparan sulfate for effective endosulfatase inhibition.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Mauro Garbini, Andrea Brunetti, Riccardo Pedrazzani, Magda Monari, Massimo Marcaccio, Giulio Bertuzzi, Marco Bandini
Summary: The self-adaptability of galvanostatic electrolysis was found to be helpful in a multistage chemo- and diastereoselective electrochemically promoted cyclodimerization of chalcones. Through a series of reductive events, densely functionalized cyclopentanes with five contiguous stereocenters were obtained (25 examples, yields up to 95%, dr values up to >20:1). Further experimental and electrochemical investigations indicated the crucial role of dynamic kinetic resolution of the aldol intermediate in the reaction mechanism.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Dhananjay S. Nipate, Neha Meena, Prakash N. Swami, Krishnan Rangan, Anil Kumar
Summary: In this study, the synthesis of functionalized benzo[a]phenazines and indazolo[2,3-a]quinolines was achieved through Rh(III)-catalyzed oxidative annulation of 2-arylquinoxalines and 2-aryl-2H-indazoles with allyl alcohols. The method showed a wide substrate scope, excellent functional group tolerance, good to high yields of annulated products, and the capability for scaled-up synthesis. A tentative mechanism of the annulation reaction was proposed based on a preliminary mechanistic investigation.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Ruonan Zhang, Abudukadi Tudi, Xia Yang, Xuping Wang, Zhihua Yang, Shujuan Han, Shilie Pan
Summary: A new lead tellurium borate material with a unique fundamental building block [B4O10] was synthesized and found to exhibit high birefringence. The structure-property relationship was discussed using first-principles calculations.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Amresh Kumar Singh, Baishali Thakurta, Anupam Giri, Monalisa Pal
Summary: This study introduces three key concepts for the quick synthesis of large-scale high-quality 2D materials films and their utilization in device fabrication.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Reina Hagiwara, Shun Nishimura, Kosuke Okeyoshi
Summary: A copolymer-conjugated nanocatalytic system has been developed to improve electron transfer and enhance photoinduced H2 generation.
CHEMICAL COMMUNICATIONS
(2024)
