Article
Chemistry, Physical
Chaitali Sow, Rajkumar Jana, Gangaiah Mettela, Ayan Datta, Giridhar U. Kulkarni
Summary: Metals exhibit crystal structure-dependent properties in bulk, micro-, or nanostructures. This study explores the stability of Au microcrystallites in unconventional lattices under common chemical adsorbates, revealing selective enhancement of diffraction intensity and lattice transformation. The facet preference of adsorbates affects the crystallinity and morphology of the crystallites.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Physical
Erwen Zhang, Huan Lu, Wei Zhang, Shuiyan Cao, Yang Wang, Rong Rong, Ying Liu, Zhuhua Zhang, Ming Yang, Yanpeng Liu, Wanlin Guo
Summary: This study experimentally and theoretically demonstrates that the surface reconstruction of Au (100) can be effectively eliminated by decorating it with tellurium (Te) atoms, while no similar behavior is found for other elements or different surfaces. The results show that the lifting of surface reconstruction starts from the boundaries and extends into the domains, creating a Au (100)-(1 x 1) surface. This finding may contribute to the design of Au-based catalysts and the construction of complex transition metal dichalcogenides.
Article
Materials Science, Multidisciplinary
Lifeng Zhang, Zejian Dong, Shuangbao Wang, Langli Luo
Summary: The compositional and phase segregation on the surface of an alloy can alter its functionality, especially in applications where surface structure and chemistry are crucial. The atomic processes during gas molecule-induced segregation remain elusive.
SCIENCE CHINA-MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Xuechao Li, Kaifeng Niu, Sai Duan, Yanning Tang, Zhengming Hao, Zhichao Xu, Haitao Ge, Johanna Rosen, Jonas Bjork, Haiming Zhang, Xin Xu, Lifeng Chi
Summary: In this study, the acetylenic homocoupling reaction of polarized terminal alkynes on Au(111) was examined using bond-resolved scanning probe microscopy. The replacement of benzene with pyridine moieties effectively inhibited the cyclotrimerization pathway and promoted linear coupling to produce well-aligned N-doped graphdiyne nanowires. Density functional theory calculations revealed that the pyridinic nitrogen modification significantly influenced the coupling motifs at the initial C-C coupling stage (head-to-head vs head-to-tail), which determined the preference of linear coupling over cyclotrimerization.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Hongbing Wang, Jinping Hu, Zhaofeng Liang, Huan Zhang, Chaoqin Huang, Lei Xie, Zheng Jiang, Han Huang, Fei Song
Summary: In this report, self-assembled two-dimensional chiral networks were created on Au(111) and Ag(111) surfaces after adsorption of the prochiral precursor, 6,12-dibromochrysene (DBCh). These networks were then transformed into organometallic (OM) oligomers after debromination, preserving the chirality. The formation of scarcely reported OM species on Au(111) was also discovered. Covalent chains were fabricated via cyclodehydrogenation between chrysene blocks, resulting in the formation of 8-armchair graphene nanoribbons with staggered valleys on both sides.
NANOSCALE ADVANCES
(2023)
Article
Chemistry, Multidisciplinary
Qilong Wu, Xiaoshuai Fu, Ke Yang, Hongyu Wu, Li Liu, Li Zhang, Yuan Tian, Long-Jing Yin, Wei-Qing Huang, Wen Zhang, Ping Kwan Johnny Wong, Lijie Zhang, Andrew T. S. Wee, Zhihui Qin
Summary: This study demonstrates a practical approach to producing highly crystalline monolayer MoSe2 using high-temperature-annealed Au foil as a weakly interacting substrate for atmospheric pressure chemical vapor deposition. The low-temperature scanning tunneling microscopy/spectroscopy measurements reveal a honeycomb structure of MoSe2 with a quasi-particle bandgap of 1.96 eV. The weak coupling between the Au(100) surface and MoSe2 is critical for easy transfer of monolayers to another host substrate.
Article
Materials Science, Multidisciplinary
Sandhya Chandola, Simone Sanna, Conor Hogan, Eugen Speiser, Julian Plaickner, Norbert Esser
Summary: This article investigates the effect of atomic hydrogen and toluene-3,4-dithiol (TDT) adsorption on the quasi-1D structures of the Si(553)-(5 x 2)-Au reconstruction. The results provide insights into the optical responses of the surface and explain the origin of the spectral modifications caused by the adsorbate exposure. The preferential adsorption at step edges induces charge transfer and modifies the electronic structure.
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
(2022)
Article
Computer Science, Artificial Intelligence
Yue Qian, Junhui Hou, Sam Kwong, Ying He
Summary: This paper proposes an end-to-end learning-based framework for generating dense point clouds from sparse ones, utilizing a lightweight neural network to adaptively learn interpolation weights and high-order refinements based on local geometry. The method is memory-efficient and flexible for various upsampling factors, showing superiority over existing methods in both quantitative and qualitative evaluations.
IEEE TRANSACTIONS ON IMAGE PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
S. Mishra, A. Demuer, D. Aoki, I Sheikin
Summary: CeRhIn5 is a prototypical antiferromagnetic heavy-fermion compound with unique behavior in a magnetic field. Applying a magnetic field in the basal plane induces two additional phase transitions, while a new phase with pronounced in-plane electronic anisotropy emerges when the field is applied along or close to the c axis. The origin of this new phase, initially suggested to be an electronic-nematic state, remains elusive.
Article
Chemistry, Physical
Shenwei Chen, Zeying Cai, Zengfu Ou, Zhiqiang Wang, Donghui Guo, Dingyong Zhong
Summary: This study explores the covalent coupling of pentacene molecules on Au(110) surfaces, showing that pentacenes undergo direct aryl-aryl coupling via C-H bond activation on the reconstructed Au(110) surface, forming linear and T-shaped dimers as the predominant products. The aryl C-H bond activation barrier is significantly reduced on the Au(110)-(1 x 3) reconstructed surfaces, where the extra row of gold atoms in the (1 x 3) reconstructed grooves plays a key role.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
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
Physics, Applied
V Danesh, H. Nejat Pishkenari, H. Zohoor
Summary: This letter discusses the surface-reconstruction-induced self-twisting behavior of Si <100> nanobelts and nanowires with rectangular cross section, and presents a continuum-based model to explain the phenomenon. It is revealed that these structures can self-assemble into both right- and left-handed helicoids depending on their crystal arrangements, with different torsion angle values for each morphology. Additionally, atomistic simulations using Tersoff's potential support the analytical discussions and are consistent with the continuum model predictions.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Chemistry, Physical
Jesse G. McDaniel, Suehyun Park
Summary: Aqueous NaCl solutions at gold electrodes serve as prototypical electrochemical interfaces. Computer simulations can help interpret electrochemical capacitance data, and our study found that the inner layer capacitance can be described by a generalized Helmholtz model.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Physical
Richard Gubo, Pengju Ren, Xin Yu, Tianfu Zhang, Xiaodong Wen, Yong Yang, Yong-Wang Li, J. W. (Hans) Niemantsverdriet, C. J. (Kees-Jan) Weststrate
Summary: The relationship between structure, electronic properties, and stability of thin FCC (100) iron and cobalt carbide films prepared on Cu(1 0 0) was studied. The first experimental confirmation of the C-induced clock reconstruction on the FCC(1 0 0) surfaces of iron and cobalt was presented. Both Fe and Co surface carbides exhibited a p4g (2 x 2) surface reconstruction with tetracoordinated square planar carbon and pure FCC (100) metal layers underneath. Detailed electronic and structural models for Fe2C and Co2C p4g (2 x 2) surface carbides and other 2D Fe2X interstitial compound systems were provided using AR-XPS, AES, LEED, STM, and theoretical calculations.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Aerospace
Thibaud Talon, Yulu Luke Chen, Sergio Pellegrino
Summary: This paper introduces a method for measuring the shape of flexible planar spacecraft using miniature sun sensors, and presents two algorithms for reconstructing the structure shape. Validation results show that both algorithms have high accuracy for structures with different degrees of deformation.
Article
Multidisciplinary Sciences
Gail Ashton, Amy L. Freestone, J. Emmett Duffy, Mark E. Torchin, Brent J. Sewall, Brianna Tracy, Mariano Albano, Andrew H. Altieri, Luciana Altvater, Rolando Bastida-Zavala, Alejandro Bortolus, Antonio Brante, Viviana Bravo, Norah Brown, Alejandro H. Buschmann, Edward Buskey, Rosita Calderon Barrera, Brian Cheng, Rachel Collin, Ricardo Coutinho, Luis De Gracia, Gustavo M. Dias, Claudio DiBacco, Augusto A. Flores, Maria Angelica Haddad, Zvi Hoffman, Bruno Ibanez Erquiaga, Dean Janiak, Anali Jimenez Campean, Inti Keith, Jean-Charles Leclerc, Orlando Pedro Lecompte-Perez, Guilherme Ortigara Longo, Helena Matthews-Cascon, Cynthia H. McKenzie, Jessica Miller, Martin Munizaga, Lais P. D. Naval-Xavier, Sergio A. Navarrete, Carlos Otalora, Lilian A. Palomino-Alvarez, Maria Gabriela Palomo, Chris Patrick, Cormack Pegau, Sandra Pereda, Rosana M. Rocha, Carlos Rumbold, Carlos Sanchez, Adolfo Sanjuan-Munoz, Carmen Schloder, Evangelina Schwindt, Janina Seemann, Alan Shanks, Nuno Simoes, Luis Skinner, Nancy Yolimar Suarez-Mozo, Martin Thiel, Nelson Valdivia, Ximena Velez-Zuazo, Edson A. Vieira, Bruno Vildoso, Ingo S. Wehrtmann, Matt Whalen, Lynn Wilbur, Gregory M. Ruiz
Summary: A study found that marine predators in tropical waters have higher consumption rates and stronger impacts on the biomass and species composition of marine invertebrate communities, possibly due to the presence of fish predators.
Article
Chemistry, Multidisciplinary
Jaime del Moral, Laura Montes, Victor Joaquin Rico-Gavira, Carmen Lopez-Santos, Stefan Jacob, Manuel Oliva-Ramirez, Jorge Gil-Rostra, Armaghan Fakhfouri, Shilpi Pandey, Miguel Gonzalez del Val, Julio Mora, Paloma Garcia-Gallego, Pablo Francisco Ibanez-Ibanez, Miguel Angel Rodriguez-Valverde, Andreas Winkler, Ana Borras, Agustin Rodriguez Gonzalez-Elipe
Summary: The use of acoustic waves for de-icing and anti-icing purposes shows promising potential, as it provides a synergistic effect when combined with surface modifications. Experiments conducted in laboratory and icing wind tunnel settings demonstrate the real-time monitoring capabilities of acoustic wave devices in icing processes.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Jesu's Graciani, David C. Grinter, PedroJ. Ramirez, Robert M. Palomino, Fang Xu, Iradwikanari Waluyo, Dario Stacchiola, Javier Fdez Sanz, Sanjaya Senanayake, Jose A. . Rodriguez
Summary: The surface chemistry of alcohol synthesis from CO2 hydrogenation was investigated over a Pt/CeOx/TiO2 catalyst, which showed high selectivity towards methanol and ethanol. The addition of water promoted the formation of C-C bonds and enhanced the production of ethanol.
Review
Chemistry, Multidisciplinary
Nicolas Pauly, Francisco Yubero, Sven Tougaard
Summary: This paper reviews a procedure for extracting primary photoelectron or Auger electron emissions from homogeneous isotropic samples. The procedure is based on a quantitative dielectric description of energy losses of swift electrons near surfaces in the presence of stationary positive charges. The theory, implemented in the QUEELS-XPS software package, considers intrinsic and extrinsic effects on electron transport and allows for interpretation of shake-up and multiplet structures.
Article
Materials Science, Multidisciplinary
Sean J. D. Lugger, Lorena Ceamanos, Dirk J. Mulder, Carlos Sanchez-Somolinos, Albert P. H. J. Schenning
Summary: In recent years, there have been significant advances in the additive manufacturing of stimuli-responsive materials, also known as 4D printing, with liquid crystal elastomers (LCEs) playing a crucial role. However, the time-consuming nature and challenging polymerization process of photo-crosslinking in LCE fabrication is a hurdle, particularly for light-responsive materials. This research introduces the first light-fueled supramolecular LCEs suitable for direct ink writing (DIW) of soft actuators, eliminating the need for photopolymerization. These responsive supramolecular materials enable the fabrication of 3D-printed objects through the thermoreversible interplay of hydrogen-bonding physical cross-links. The printed supramolecular LCE exhibits reversible shape changes in response to light and can bend and lift a load. By incorporating azobenzene, the actuators can be triggered by both photothermal and photochemical stimuli in air and water. The DIW process allows for the printing of complex responsive objects, as exemplified by re-entrant honeycomb and spiral director structures. This approach of printing light-responsive supramolecular soft actuators paves the way for the application of smart and sustainable materials in additive manufacturing without the requirement of photo-crosslinking.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Nanoscience & Nanotechnology
Amit S. Pawbake, Ruchita T. Khare, Joshua O. Island, Eduardo Flores, Jose R. Ares, Carlos Sanchez, Isabel J. Ferrer, Mahendra Pawar, Otakar Frank, Mahendra A. More, Herre S. J. van der Zant, Andres Castellanos-Gomez, Dattatray J. Late
Summary: The field emission properties of TiS3 nanosheets and nanoribbons synthesized from bulk titanium were investigated. The nanosheets exhibited enhanced field emission behavior with a low turn-on field and delivered a large emission current density at a relatively low applied electric field. The superior field emission performance of TiS3 nanosheets over nanoribbons makes them a propitious field emitter for vacuum nanoelectronics devices.
ACS APPLIED NANO MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Jorge Gil-Rostra, Javier Castillo-Seoane, Qian Guo, Ana Belen Jorge Sobrido, Agustin R. Gonzalez-Elipe, Ana Borras
Summary: This work proposes a new architecture of photoelectrodes consisting of supported multishell nanotubes fabricated by a soft-template approach. The obtained NT electrodes have a large electrochemically active surface and outperform the efficiency of equivalent planar-layered electrodes by more than one order of magnitude. The characteristics of the WO3/BiVO4 Schottky barrier heterojunction control the NT electrode efficiency, which depends on the BiVO4 outer layer thickness and the incorporation of the CoPi electrocatalyst, as demonstrated by thorough electrochemical analysis.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Gerardo Asensio, Ana M. Hernandez-Arriaga, Marcela Martin-del-Campo, M. Auxiliadora Prieto, Agustin R. Gonzalez-Elipe, Luis Rojo, Blanca Vazquez-Lasa
Summary: The accumulation of bacteria over implant surfaces is the main cause of failure, and the development of antimicrobial surfaces is crucial. Additionally, the durability and mechanical performance of implants are determined by their osseointegration capacity and infection prevention. Therefore, bioactive surfaces are being researched to improve implant osseointegration and infection prophylaxis.
APPLIED SURFACE SCIENCE
(2023)
Article
Nanoscience & Nanotechnology
A. M. Alcaide, G. Regodon, F. J. Ferrer, V Rico, R. Alvarez, T. C. Rojas, A. R. Gonzalez-Elipe, A. Palmero
Summary: The formation of monoclinic VO2 crystal domains at low temperatures in nanocolumnar vanadium/oxygen thin films deposited via magnetron sputtering is analyzed. The synthesis involved depositing amorphous nanocolumnar VO1.9 thin films at room temperature and annealing them at temperatures between 250 - 330 ? in an oxygen atmosphere. The nanocolumnar structures exhibited a thermochromic transition at 47 ? (for annealing at 270 ?) and 58 ? (for annealing at 280 and 290 ?), resulting in a significant drop in optical transmittance in the infrared region.
Article
Chemistry, Multidisciplinary
Paula Navascues, Juan Garrido-Garcia, Jose Cotrino, Agustin R. Gonzalez-Elipe, Ana Gomez-Ramirez
Summary: This study investigates the synthesis of ammonia using plasma-catalysis and examines the role of various catalyst materials. The results show that while ruthenium particles have some catalytic activity under certain conditions, they do not significantly improve the yield and energy efficiency of ammonia synthesis. The ferroelectric material and the alumina coating play important roles in regulating discharge and cooling the plasma, respectively.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Rafael Alvarez, Guillermo Regodon, Hiedra Acosta-Rivera, Victor Rico, German Alcala, Agustin R. Gonzalez-Elipe, Alberto Palmero
Summary: This paper studied the morphology and void connectivity of thin films grown by magnetron sputtering deposition at oblique geometries. A well-tested thin film growth model was used, along with experimental data, to assess the features of these layers. The film morphology and pore topology varied significantly with the growth conditions, which were linked to the different collisional transport of sputtered species in the plasma gas. Four different film morphologies were identified, and their porous network characteristics were described, explaining their potential applications in electrochromic sensors or infiltration with nanoparticles.
Article
Materials Science, Multidisciplinary
Stefan Jacob, Shilpi Pandey, Jaime Del Moral, Atefeh Karimzadeh, Jorge Gil-Rostra, Agustin R. Gonzalez-Elipe, Ana Borras, Andreas Winkler
Summary: This study successfully demonstrates the de-icing functionality of large areas covered with thick layers of glaze ice using nanoscale activation by surface acoustic waves. The method shows potential for practical applications in various industries.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Materials Science, Multidisciplinary
V. Rico, G. F. Regodon, A. Garcia-Valenzuela, A. M. Alcaide, M. Oliva-Ramirez, T. C. Rojas, R. Alvarez, F. J. Palomares, A. Palmero, A. R. Gonzalez-Elipe
Summary: In this study, a novel methodology of plasma-assisted thin film structuration was proposed by combining piezoelectric AWs and plasmas during the growth of a thin film. SiO2 and SiOx (x<2) thin films were deposited by magnetron sputtering at oblique angles (MS-OAD) on an electro-acoustically excited LiNbO3 piezoelectric substrate under resonant conditions. The resulting films exhibited 2D patterned microstructure with submillimeter size intermingled zones, which replicated the distribution of polarization potential on the AW activated substrate immersed in the plasma. The main mechanism responsible for the appearance of domains with different morphology and chemical composition was found to be the focused impingement of Ar+ plasma ions on certain regions of the substrate. The discussed the general character of this patterning process, the underlying physics, and its possibilities to tailor the composition and microstructure of dielectric thin film materials.
Meeting Abstract
Critical Care Medicine
G. L. Chupp, L. G. Heaney, G. Pelaia, T. Welte, C. Almonacid Sanchez, J. K. Lee, A. Maxwell, R. G. Price, R. W. Jakes, R. Alfonso Cristancho, P. Howarth, G. Brusselle
AMERICAN JOURNAL OF RESPIRATORY AND CRITICAL CARE MEDICINE
(2022)
Article
Materials Science, Multidisciplinary
Javier Castillo-Seoane, Lola Gonzalez-Garcia, Jose M. Obrero-Perez, Francisco J. Aparicio, Ana Borras, Agustin R. Gonzalez-Elipe, Angel Barranco, Juan R. Sanchez-Valencia
Summary: This article discusses the incorporation of Rhodamine 6G and 800 dyes into polymeric matrices and the enhanced fluorescent emission in the near-infrared range that occurs when both dyes are present. The study explores the control of dye concentration to simulate heteroaggregate formation, and the efficient energy transfer between the dyes for wavelength shifting. The findings have potential practical applications utilizing inexpensive commercial detectors and systems.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)