Article
Chemistry, Multidisciplinary
Belen Rubio-Ruiz, Ana M. Perez-Lopez, Laura Uson, M. Carmen Ortega-Liebana, Teresa Valero, Manuel Arruebo, Jose L. Hueso, Victor Sebastian, Jesus Santamaria, Asier Unciti-Broceta
Summary: Bioorthogonal metallocatalysis allows for nonenzymatic catalytic transformations in living environments. However, most metals are deactivated by reactive biomolecules inside cells, limiting their catalytic activity. In this study, cytocompatible alloyed AuPd nanoparticles were developed for efficient bioorthogonal depropargylations in biological media. Encapsulation of the nanoparticles in mesoporous silica nanorods or a biodegradable PLGA matrix enhanced their intracellular catalytic performance and enabled the release of anticancer drug paclitaxel inside cancer cells. This work demonstrates the potential of nanoalloy encapsulation for mediating new-to-life reactions in cells.
Article
Chemistry, Physical
Jianbo Zhao, Haifeng Yuan, Guang Yang, Yingfan Liu, Xiaomei Qin, Zheng Chen, Cheong Weng-Chon, Liming Zhou, Shaoming Fang
Summary: The Au-Pt bimetallic nanoparticles immobilized on SBA-15 were prepared with uniform size and existing in the form of alloy structure, exhibiting higher activity and selectivity compared to monometallic catalysts. The observed properties were attributed to the synergic effect between Au and Pt, enhancing abilities of hydrogen dissociation and adsorption and activation of quinoline. This precise synthetic strategy provides a new and main approach for selective hydrogenations with high performance.
Article
Chemistry, Multidisciplinary
Jakub Jurczyk, Katja Hoeflich, Katarzyna Madajska, Luisa Berger, Leo Brockhuis, Thomas Edward James Edwards, Czeslaw Kapusta, Iwona B. Szymanska, Ivo Utke
Summary: Gas-assisted focused electron-beam-induced deposition is a versatile tool for direct writing of complex-shaped nanostructures with unprecedented shape fidelity and resolution. The direct electron beam writing of silver is still in its early stage of development, and the potential precursors for focused electron-beam-induced deposition of silver are examined and compared in this study.
Article
Physics, Applied
Huseyin Yildirim
Summary: Gupta and Density Functional Theory (DFT) calculations were conducted to investigate the structural and magnetic behaviors of FenRh19-n (n=0-19) nanoalloys composed of 19 atoms. It was found that the addition of Fe atoms had significant effects on the chemical ordering, stability, and total magnetic moments of the nanoalloys. Fe atoms were observed to be located in the center and equatorial region of the double icosahedron structure. The most stable compositions were determined to be Fe12Rh7 and Fe4Rh15 nanoalloys according to the Gupta and DFT calculations, respectively. The results also indicated that the FenRh19-n (n=0-19) nanoalloys were energetically suitable for mixing at both Gupta and DFT levels. Furthermore, the increase in total magnetic moments of the nanoalloys correlated with the addition of Fe atoms, which exhibit ferromagnetic properties.
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
(2022)
Article
Chemistry, Physical
Jiabin Xu, Kun Feng, Cheng Lu, Xuchun Wang, Jiatang Chen, Zhiqiang Wang, Jun Zhong, Yining Huang, Tsun-Kong Sham
Summary: In this study, Mg-N-C materials derived from annealing of a Mg-based metal-organic framework (MOF) were prepared, and Pt nanoparticles were successfully anchored to it, forming highly crystalline Pt3Mg nanoalloys. The formation of Pt3Mg nanoalloys induces a downshift of the Pt d-band, leading to improved oxygen reduction reaction (ORR) performance.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Physical
Davide Fioravanti, Giovanni Barcaro, Alessandro Fortunelli
Summary: The study introduces the Augmented Grouping Approach (AugGA) and its deployment in the Augmented Grouping GO (AugGGO) scheme to efficiently explore the chemical ordering of multi-component nanoparticles. By defining sets of atoms with the same element to decrease compositional degrees of freedom, significant advances are made in applying the approach to binary nanoalloys and deriving mixing energy convex hulls. The proposed advances extend the power and scope of the grouping approach, making it applicable to various structural frameworks and capturing exotic chemical ordering arrangements at a lower computational cost.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Review
Materials Science, Multidisciplinary
Khushubo Tiwari, M. Manolata Devi, Krishanu Biswas, Kamanio Chattopadhyay
Summary: This review focuses on the phase transformation behavior of alloy nanoparticles, including free and embedded nanoparticles, as well as the effects of size, shape, and chemical order on phase transformation and alloying. It compares different conditions of nanoparticles and discusses unresolved issues and future research directions.
PROGRESS IN MATERIALS SCIENCE
(2021)
Article
Computer Science, Information Systems
Taehoon Jung, Jaejoon Lee, Jaewook Lee
Summary: This paper presents the design and fabrication schemes of a magnetic system consisting of segmented permanent magnet (PM) blocks, back-iron and frame structures. Non-intuitive design of segmented PMs and back-iron are obtained using multi-material topology optimization formulation, and a non-magnetic frame structure is designed through a post-processing procedure using the smoothed fields of optimized PM and back-iron densities. Two magnetic systems are successfully designed and fabricated for maximizing the magnetic field inside a rectangular cavity, and maximizing the magnetic force generated with a C-core electromagnet.
Article
Chemistry, Multidisciplinary
Quentin Gromoff, Patrizio Benzo, Wissam A. Saidi, Christopher M. Andolina, Marie-Jose Casanove, Teresa Hungria, Sophie Barre, Magali Benoit, Julien Lam
Summary: This study focuses on the formation mechanisms of nanoalloys, particularly in the gold/silver system. By combining experiments and simulations, the researchers uncovered the atomic-level processes involved in the formation of nanoparticles. They found that the nanoparticles in the alloy system exhibit five-fold symmetric morphology, with gold atoms segregating at the surface of the nanoparticles. These findings contradict previous studies and have implications for crystallization dynamics and crystal ordering.
Article
Chemistry, Physical
Songul Taran, Haydar Arslan
Summary: This study investigates the structural and dynamical properties of Au-Pd bimetallic nanoalloys supported on MgO(001) surface, revealing the lowest energy structures and melting temperatures of nanoalloys with various compositions.
Article
Chemistry, Physical
Nicola Danielis, Lorena Vega, Giovanna Fronzoni, Mauro Stener, Albert Bruix, Konstantin M. Neyman
Summary: This study computationally investigated the chemical ordering and optical properties of AgPd, AuPd, and AuPt nanoparticles, revealing that the remarkable ordering L1(1) of inner atoms is favored mainly in small AgPt particles and less in other nanoalloys. The optical properties were found to be more dependent on the composition of the nanoparticles than on their chemical ordering. Both Pt and Pd elements were found to promote the quenching of the plasmon.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Nanoscience & Nanotechnology
Felix Jungwirth, Fabrizio Porrati, Alfons G. Schuck, Michael Huth, Sven Barth
Summary: Two new precursors for focused electron beam-induced deposition (FEBID) of cobalt silicides have been synthesized, showing low sensitivity to changes in FEBID parameters and high growth rates. The deposits contain about 80% cleaved carbonyl ligands and exhibit temperature-dependent electrical properties, with magnetoresistance behavior indicative of tunneling magnetoresistance. Postgrowth irradiation treatment substantially reduces the observed magnetoresistance.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Sharafaldin Al-Musawi, Salim Albukhaty, Hassan Al-Karagoly, Faizah Almalki
Summary: A dual-targeting nanomedicine composed of pH-sensitive superparamagnetic iron oxide core-gold shell SPION@Au, chitosan (CS), and folate (FA) was developed for doxorubicin (DOX) antitumor medication. The nanocomposite exhibited elevated drug loading behavior and sustained drug release capacity, with long-term anti-cancer efficacy shown in SkBr3 cell lines. In vivo results demonstrated significant tumor size reduction in treated mice, indicating the potential of this formulation for clinical breast cancer treatment.
Article
Engineering, Chemical
Kresimir Ljubetic, Wenying Liu
Summary: The global gold industry is seeking alternative technologies to cyanidation for treating low grade refractory gold ores due to the inefficiency of cyanide and increased public scrutiny. Chloride has been identified as a potential replacement for cyanide, but little research has been done on gold leaching in ferric chloride media at moderate temperatures. This study investigates the thermodynamics and kinetics of gold dissolution in ferric chloride media, and explores the effects of key process variables on the rate and extent of gold dissolution.
MINERALS ENGINEERING
(2022)
Article
Nanoscience & Nanotechnology
Cristiano Glessi, Aya Mahgoub, Cornelis W. Hagen, Mats Tilset
Summary: Seven gold(I) N-heterocyclic carbene complexes were synthesized, characterized, and tested as precursors for focused electron beam-induced deposition. The research showed that the most suitable organic ligand for the gold precursor is triazole-based, while the most suitable anionic ligand is the trifluoromethyl group.
BEILSTEIN JOURNAL OF NANOTECHNOLOGY
(2021)
Article
Chemistry, Physical
Abdulrahman Alazman, Domagoj Belic, Abdullah Alotaibi, Elena F. Kozhevnikova, Ivan V. Kozhevnikov
Article
Biochemistry & Molecular Biology
Ivana Panzic, Krunoslav Juraic, Niksa Krstulovic, Ana Santic, Domagoj Belic, Damjan Blazeka, Milivoj Plodinec, Vilko Mandic, Jelena Macan, Adnan Hammud, Danail Ivanov, Jasper Plaisier, Marc Gregor Willinger, Davor Gracin, Andreja Gajovic
Article
Optics
Nicolas Cazier, Pedram Sadeghi, Miao-Hsuan Chien, Mostafa Moonir Shawrav, Silvan Schmid
Article
Biochemistry & Molecular Biology
Stephanie Jephthah, Linda K. Mansson, Domagoj Belic, Jens Preben Morth, Marie Skepo
Article
Materials Science, Multidisciplinary
Dorota A. Kowalczyk, Maciej Rogala, Karol Szalowski, Witold Kozlowski, Iaroslav Lutsyk, Michal Piskorski, Pawel Krukowski, Pawel Dabrowski, Domagoj Belic, Michal Cichomski, Zbigniew Klusek, Pawel J. Kowalczyk
Summary: Van der Waals epitaxy was used to grow 2D molybdenum trioxide monolayer on graphite, and its electronic properties were studied. It was confirmed that MoO3-x can be electrically conductive, with the exposure to air affecting its electronic properties.
Article
Physics, Applied
Miao-Hsuan Chien, Mostafa M. Shawrav, Kurt Hingerl, Philipp Taus, Markus Schinnerl, Heinz D. Wanzenboeck, Silvan Schmid
Summary: This work presents a new chemical composition characterization method for direct-write focused electron beam-induced deposition (FEBID) gold nanostructures, demonstrating the possibility of characterizing the carbon content through differences in optical absorption and nanomechanical resonator frequency detuning. Post-purification with water successfully reduced the carbon content, offering a new technique for chemical analysis of nanostructures.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Philipp Taus, Adrian Prinz, Heinz D. Wanzenboeck, Patrick Schuller, Anton Tsenov, Markus Schinnerl, Mostafa M. Shawrav, Michael Haslinger, Michael Muehlberger
Summary: This study demonstrates different approaches for generating sophisticated undercut T-shaped masters suitable for nanoimprint lithography, successfully fabricating single-layer and multilayer undercut T-shaped structures, which can be applied to replicate structural colors on artificial surfaces in the future.
Article
Chemistry, Multidisciplinary
Guanqun Du, Alessandra Del Giudice, Viveka Alfredsson, Anna M. Carnerup, Kaizheng Zhu, Bo Nystrom, Yilin Wang, Luciano Galantini, Karin Schillen, Domagoj Belic
Summary: The condensation of DNA helices into hexagonally packed bundles and toroids is a fascinating example of functional organization of biological macromolecules at the nanoscale. Researchers have successfully reproduced a DNA-like condensation with supramolecular helices of small chiral molecules, suggesting a more general phenomenon. The study reveals unknown similarities between covalent and supramolecular non-covalent helical polyelectrolytes, potentially inspiring the construction of supramolecular versions of biological macromolecules in the future.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Physical
Domagoj Belic, Oihane Fragueiro, Dina Salah, Alison Beckett, Martin Volk, Mathias Brust
Summary: This study demonstrates a method for direct imaging of engineered nanomaterials in biological cells using environmental scanning electron microscopy and wet-scanning transmission electron microscopy. The approach allows for high-throughput analysis of fully hydrated cells with nanometer resolution without the need for destructive processing steps.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Nanoscience & Nanotechnology
Dorota A. Kowalczyk, Maciej Rogala, Karol Szalowski, Domagoj Belic, Pawel Dabrowski, Pawel Krukowski, Iaroslav Lutsyk, Michal Piskorski, Aleksandra Nadolska, Patryk Krempinski, Maxime Le Ster, Pawel J. Kowalczyk
Summary: The crystallinity of 2D materials is crucial for effectively modifying the work function. Crystalline 2D MoO3 monolayer can enhance the substrate work function, making it a great candidate for tuning properties of anode materials and designing organic electronic devices. Through Kelvin probe force microscopy and ultraviolet photoemission spectroscopy, it is found that a controlled environment and high crystallinity are important factors for achieving high work function in MoO3. Density functional theory calculations suggest that oxygen vacancies result in anisotropy of work function in the sides of MoO3 monolayer.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Andrea Santilli, Andrea Lapi, Jacopo Cautela, Marco D'Abramo, Cheng Giuseppe Chen, Alessandra Del Giudice, Simona Sennato, Domagoj Belic, Victor Hugo Soto Tellini, Karin Schillen, Maria Chiara di Gregorio, Luciano Galantini
Summary: The molecular design in this work enables the encoding of multiple desirable features (such as bio-origin, temperature resistance, and chirality of the aggregates) in the same light-responsive system, which has never been reported before for a single molecule. This combination of properties could be relevant for the development of robust, stimuli-responsive bio-vectors.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Casper Kunstmann-Olsen, Domagoj Belic, Dan F. Bradley, Stephen P. Danks, Yuri A. Diaz Fernandez, Marcin P. Grzelczak, Alexander P. Hill, Xiaohang Qiao, Rasmita Raval, Ioritz Sorzabal-Bellido, Mathias Brust
Summary: The experiment demonstrates the selective unidirectional transport of barium ions between water-in-chloroform emulsion droplets using gold nanoparticles modified with thiolated crown ether. The shuttle action of the gold nanoparticles is potentially influenced by the charging of the metal cores and the electrostatically coupled secondary processes that maintain the electroneutrality of the emulsion droplets.Various techniques including optical microscopy, Raman spectroscopy, cryo-SEM, and zeta potential were used to monitor and study the processes involved.
NANOSCALE ADVANCES
(2021)
Article
Chemistry, Multidisciplinary
Jacopo Cautela, Bjoern Stenqvist, Karin Schillen, Domagoj Belic, Linda K. Mansson, Fabian Hagemans, Maximilian Seuss, Andreas Fery, Jerome J. Crassous, Luciano Galantini
Article
Chemistry, Physical
Maria Jansson, Domagoj Belic, Jan Forsman, Marie Skepo
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2020)
Article
Nanoscience & Nanotechnology
Lidija Andros Dubraja, Dominic Boll, Christian Reitz, Di Wang, Domagoj Belic, Andrey Mazilkin, Ben Breitung, Horst Hahn, Matthias T. Elm, Torsten Brezesinski
ACS APPLIED NANO MATERIALS
(2019)
