Article
Chemistry, Physical
J. E. Prieto, M. A. Gonzalez-Barrio, E. Garcia-Martin, G. D. Soria, L. Morales de la Garza, J. de la Figuera
Summary: In this study, Li metal was deposited on the surface of Ru(0001) single crystal with graphene islands. The local work function was measured using low-energy electron microscopy and diffraction, revealing that Li deposition decreases the work function of the graphene islands to a smaller degree than that of the Ru(0001) surface.
APPLIED SURFACE SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Takushi Iimori, Anton Visikovskiy, Hitoshi Imamura, Toshio Miyamachi, Miho Kitamura, Koji Horiba, Hiroshi Kumigashira, Kazuhiko Mase, Kan Nakatsuji, Satoru Tanaka, Fumio Komori
Summary: The electronic structure of 3 degrees-twisted bilayer graphene was studied using ARPES, showing that strong interlayer coupling significantly modifies the Dirac electrons' properties. The observed electronic structure was consistently reproduced by tight-binding calculations and band unfolding method.
PHYSICAL REVIEW MATERIALS
(2021)
Article
Chemistry, Physical
Xiaofeng Yu, Obinna A. Nwakaire, Steinar Raaen
Summary: Samarium layers were deposited on graphene grown on a Ru(0001) substrate and investigated using photoelectron spectroscopy and low energy electron diffraction. Both divalent and trivalent Sm atoms were observed in these thin films, with the fraction of divalent Sm depending on the coverage in the near monolayer regime. Up to 65% divalent Sm atoms were observed for sub monolayer coverage. Upon annealing above 300 K, Sm atoms were found to migrate to the Ru interface.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Dominic A. Esan, Michael Trenary
Summary: The adsorption behavior of CO on Pt nanoclusters on a single layer of graphene grown on the Ru(0001) surface was studied using RAIRS and TPD, revealing that the complete coverage of Ru(0001) by graphene can reduce CO adsorption. The RAIRS intensity for CO on Pt/Gr/Ru(0001) was found to be nine times higher than that on Ru(0001) on a per molecule basis.
JOURNAL OF CHEMICAL PHYSICS
(2021)
Article
Chemistry, Physical
I. Morawski, M. Nowicki
Summary: In this study, various surface sensitive experimental methods were used to characterize the growth mode and order of Au layers on the Ru(0001) surface. Adsorption at different temperatures revealed the formation of gold wetting layers at elevated temperatures and the growth of three-dimensional gold islands. Analysis of experimental and theoretical data showed equal population of A and B type terraces on Ru(0001) and unrotated and rotated Au(1 1 1) domains. The discussion focused on the adsorbate and substrate structures, inelastic mean free paths, and scattering properties of individual Au and Ru atoms.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Yi-Cheng Huang, Hung-Yu Yen, Liang-Wei Lan, D. Dutta, A. Rahmah, Yu-Ling Lai, Yao-Jane Hsu, Chien-Cheng Kuo, Jeng-Han Wang, Meng-Fan Luo
Summary: The dissociation of water on Rh-O* clusters was studied, revealing that excess O* on small clusters promoted the dissociation of water, leading to an increase in hydroxyl (OH*) production. Furthermore, hydroxyl produced on Rh-O* clusters showed superior thermal stability compared to that on the Rh(111)(O*) surface.
JOURNAL OF CHEMICAL PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Sandra Ruiz-Gomez, Eva Maria Trapero, Claudia Fernandez-Gonzalez, Adolfo del Campo, Cecilia Granados-Miralles, Jose Emilio Prieto, Muhammad Waqas Khaliq, Miguel Angel Nino, Michael Foerster, Lucia Aballe, Juan de la Figuera
Summary: We have grown high-quality magnetite micrometric islandson ruthenium stripes on sapphire through a combination of magnetron sputtering (Ru film), high-temperature molecular beam epitaxy (oxide islands), and optical lithography. The magnetic domains on the magnetite islands can be modified by the application of current pulses through the Ru stripes in combination with magnetic fields.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Chemistry, Physical
Johannes Halle, Nicolas Neel, Joerg Kroeger
Summary: The research reveals that graphene phonons can be excited by the local injection of electrons and holes from the tip of a scanning tunneling microscope. Both monolayer and bilayer graphene exhibit distinct phonon signatures in spectroscopy, with differences in phonon energies and the presence of a Dirac cone plasmon excitation in bilayer graphene.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Physical
Danjo De Chavez, Jun-ya Hasegawa
Summary: To understand the influence of incongruent strain on heterogeneous catalysis, the effect of isotropic and anisotropic strains in the catalytic activity of terrace Ru(0001) and stepped Ru(1015) surfaces have been studied. Adsorption-strain relations were investigated using the d-band model and the novel eigenstress model, and it was found that strain can alter the adsorption energies and activation energies, offering a potential route to break the Bronsted-Evans-Polyani relation in catalysis.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Physical
Xinyu Huang, Wen Zhao, Chongyang Zhu, Xianjue Chen, Xu Han, Jie Xing, Lihong Bao, Lei Meng, Norman N. Shi, Peng Gao, Lei Liu, Xingjiang Zhou, Feng Xu, Feng Ding, Yuan Huang
Summary: This work presents a highly efficient fast-cooling method to create wrinkle networks in layered materials, indicating that wrinkles significantly impact the chemical reactivity and the new wrinkle engineering method can tune the physical and chemical properties of multilayer graphene.
CHEMISTRY OF MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Yuriy Dedkov, Junhao Zhou, Yefei Guo, Elena Voloshina
Summary: The growth of a high-quality complete graphene layer is successfully achieved for Ir(111) and Ru(0001) substrates using liquid ethanol as a precursor,which provides an easy, quick, and reproducible method to synthesize large-scale graphene on different metallic substrates.
ADVANCED MATERIALS INTERFACES
(2023)
Article
Physics, Condensed Matter
Huan Yang, Ivan Abilio, Juan Bernal Romero, Carlos Rodriguez, Miguel Escobar Godoy, Mitchell Little, Patrick Mckee, Vanessa Carbajal, Joey Li, Xing Chen, Hong-Jun Gao, Krisztian Palotas, Li Gao
Summary: N-doped graphene materials were synthesized using adenine as the sole precursor on Ir(111) and Ru(0001) surfaces. X-ray photoelectron spectroscopy and scanning tunneling microscopy (STM) were used to characterize the obtained materials. The presence of graphitic and pyridinic N dopants on the atomic scale was confirmed by STM measurements and simulations based on density functional theory calculations.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2023)
Article
Biochemistry & Molecular Biology
Xiaofeng Yu, Steinar Raaen
Summary: The formation of graphene on Ru (0001) by exposure to ethylene and subsequent annealing was investigated using low-energy electron diffraction, X-ray photoelectron spectroscopy, and ultraviolet photoelectron spectroscopy. The stability of graphene/intercalated oxygen/Ru (0001) was studied by temperature programmed desorption spectroscopy. The desorption of CO and CO2 was observed at temperatures above 700 K, indicating the removal of intercalated oxygen and partly intact graphene layer. It was concluded that the oxygen-intercalated graphene layer remained stable up to temperatures of about 700 K.
Article
Chemistry, Physical
Tuan-Hoang Tran, Raul D. Rodriguez, Marco Salerno, Aleksandar Matkovic, Christian Teichert, Evgeniya Sheremet
Summary: Freshly cleaved HOPG shows time-evolving domains with surface potential contrast, attributed to locally different hydrocarbon adsorption driven by structural defects likely related to rotational mismatch. Raman spectroscopy results support the hypothesis of bilayer graphene behavior due to broken symmetry at the top surface. This indicates that the chemical and electrical properties of HOPG are more complex than generally believed.
Article
Multidisciplinary Sciences
Henrik Woerdenweber, Silvia Karthaeuser, Annika Grundmann, Zhaodong Wang, Stephan Aussen, Holger Kalisch, Andrei Vescan, Michael Heuken, Rainer Waser, Susanne Hoffmann-Eifert
Summary: Metal-free chemical vapor deposition allows for the high-quality synthesis of single-layer graphene. The interactions at the graphene-sapphire interface and the substrate topography affect the properties of graphene. Graphene near sapphire step edges forms tiny wrinkles, while adsorption on hydroxyl-terminated alpha-Al2O3 leads to a periodic superstructure. This hybrid system shows promise for emerging electronic applications.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Physical
Chuanlin Zhao, Charles Watt, Paul R. Kent, Steven H. Overbury, David R. Mullins, Florencia C. Calaza, Aditya Savara, Ye Xu
JOURNAL OF PHYSICAL CHEMISTRY C
(2019)
Correction
Chemistry, Applied
Chuanlin Zhao, Ye Xu
TOPICS IN CATALYSIS
(2020)
Article
Chemistry, Multidisciplinary
Zheng Xi, Xun Cheng, Zhuangqiang Gao, Mengjing Wang, Tong Cai, Michelle Muzzio, Edwin Davidson, Ou Chen, Yeonwoong Jung, Shouheng Sun, Ye Xu, Xiaohu Xia
Editorial Material
Chemistry, Applied
Ye Xu, Lars C. Grabow
TOPICS IN CATALYSIS
(2020)
Article
Chemistry, Applied
Shengjie Zhang, Duane D. Johnson, William A. Shelton, Ye Xu
TOPICS IN CATALYSIS
(2020)
Article
Chemistry, Physical
Suman Bhasker-Ranganath, Chuanlin Zhao, Ye Xu
Summary: The study utilized density functional theory calculations to investigate the adsorption of phosphoric acid and two model phosphate monoesters on the surface of Ceria, revealing consistent patterns and properties during the adsorption process. The bonding of the phosphorous atom to a surface oxygen atom was found to be the only stable adsorption state, while Ce3+ had negligible impact on the reaction.
Article
Chemistry, Physical
Frank McKay, Yuxin Fang, Orhan Kizilkaya, Prashant Singh, Duane D. Johnson, Amitava Roy, David P. Young, Phillip T. Sprunger, John C. Flake, William A. Shelton, Ye Xu
Summary: Research has shown that the partially oxidized surface of quaternary HEA based on base metals is more active for the electrochemical hydrogen evolution reaction in acidic solutions, surpassing the individual component metals.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Physical
Suman Bhasker-Ranganath, Md Saeedur Rahman, Chuanlin Zhao, Florencia Calaza, Zili Wu, Ye Xu
Summary: Utilizing in situ DRIFTS and DFT calculations, we have definitively demonstrated the aldol condensation of acetaldehyde on ceria octahedral nanoparticles, forming trans-Crotonaldehyde. The reaction is desorption-limited at ambient temperature, with the mechanism proceeding through various steps including enolization, C-C coupling, and dehydroxylation. The study also reveals the presence of oxygen vacancies as inactive sites for Crotonaldehyde formation under certain conditions.
Article
Engineering, Chemical
Krishnaswamy Nandakumar, Mayank Tyagi, Ye Xu, Kalliat T. Valsaraj, Jyeshtharaj B. Joshi
Summary: Through introspection and assessment, the chemical engineering field has developed a mature undergraduate curriculum that equips engineers with skills in transport, reaction engineering, and thermodynamics. However, there is a need to adapt the curriculum to meet the needs of established industries while nurturing innovators for emerging industries, without harming the field unintentionally.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Physical
Suman Bhasker-Ranganath, Ye Xu
Summary: Using DFT calculations and acetamide as an example, this study shows that ceria has the potential to catalyze the hydrolysis of amide and similar bonds. The research suggests that Ce-O-Ce sites on ceria surfaces can activate various generalized ester bonds, and a simple descriptor based on electronegativity captures the stability of the transition state, providing a direction for modifying ceria for specific organic substrates.
Article
Chemistry, Physical
Viacheslav Kalinovych, Md Saeedur Rahman, Lesia Piliai, Yuliia Kosto, Sascha L. Mehl, Tomas Skala, Iva Matolinova, Vladimir Matolin, Kevin C. Prince, Ye Xu, Nataliya Tsud
Summary: The adsorption of phenylphosphonic acid (PPA) on Cu(111) was studied and it was found that the dehydrogenated phenylphosphonic acid molecule (PP) is the dominant surface species in the temperature range 150-300 degrees C. The stable PP adlayer effectively protects the Cu(111) surface from oxidation. Furthermore, thermal treatment of the PPA adlayer leads to molecular decomposition and subsequent formation of phosphorus-rich species at higher temperatures.
APPLIED SURFACE SCIENCE
(2022)
Review
Chemistry, Multidisciplinary
Jiawei Wang, Lipo Ma, Junyuan Xu, Ye Xu, Ke Sun, Zhangquan Peng
Summary: This review summarizes the application of surface-enhanced Raman spectroscopy (SERS) in studying oxygen electrochemistry, specifically in aprotic Li-O-2 batteries. SERS can provide precise spectroscopic identification of reactants, intermediates, and products at the electrode|electrolyte interfaces, independent of their physical states and crystallinity levels, as well as resolve different isotopes to identify mass transport limitations and reactive sites.
Article
Chemistry, Physical
Sofiia Bercha, Suman Bhasker-Ranganath, Xiaohui Zheng, Klara Beranova, Mykhailo Vorokhta, Robert G. Acres, Tomas Skala, Vladimir Matolin, Kevin C. Prince, Ye Xu, Nataliya Tsud
APPLIED SURFACE SCIENCE
(2020)
Article
Chemistry, Physical
Yuxin Fang, Xun Cheng, John C. Flake, Ye Xu
CATALYSIS SCIENCE & TECHNOLOGY
(2019)
Article
Chemistry, Physical
Mohammed Abdel-Rahman, Xu Feng, Mark Muir, Kushal Ghale, Ye Xu, Michael Trenary
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2019)
