Article
Chemistry, Physical
V. Carnevali, A. Sala, P. Biasin, M. Panighel, G. Comelli, M. Peressi, C. Africh
Summary: The electronic properties of graphene can be modified by local interaction with a metal substrate. This article proposes a reliable method of evaluating the interaction between graphene and substrate by testing the tunneling current. This method expands the capabilities of standard STM systems for studying graphene/substrate complexes.
Article
Chemistry, Multidisciplinary
Yi-Ying Sung, Harmina Vejayan, Christopher J. Baddeley, Neville V. Richardson, Federico Grillo, Renald Schaub
Summary: On-surface synthesis with designer precursor molecules is an effective method for preparing graphene nanoribbons (GNRs) with tunable electronic properties. The band gap of GNRs doped with heteroatoms remains unchanged, but hydrogenation can engineer a tunable band gap. Surface-confined hydrogenation studies on 7-armchair GNRs grown on Au(111) surfaces reveal a self-limited hydrogenation process. The electronic properties of the GNR/Au(111) system can be modified by edge and basal-plane hydrogenation, and a mechanism for the hydrogenation process is proposed.
Article
Multidisciplinary Sciences
Alexander Kerelsky, Carmen Rubio-Verdu, Lede Xian, Dante M. Kennes, Dorri Halbertal, Nathan Finney, Larry Song, Simon Turkel, Lei Wang, Kenji Watanabe, Takashi Taniguchi, James Hone, Cory Dean, Dmitri N. Basov, Angel Rubio, Abhay N. Pasupathy
Summary: This study demonstrates the formation of emergent correlated phases in multilayer rhombohedral graphene without the need for twisted van der Waals layers. The study shows that two layers of bilayer graphene twisted by a tiny angle can host large regions of uniform rhombohedral four-layer graphene with a sharp van Hove singularity. Furthermore, the study suggests that the broken symmetry state in ABCA graphene could be attributed to a charge-transfer excitonic insulator or a ferrimagnet.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Chemistry, Multidisciplinary
Daniel J. Rizzo, Sara Shabani, Bjarke S. Jessen, Jin Zhang, Alexander S. McLeod, Carmen Rubio-Verdu, Francesco L. Ruta, Matthew Cothrine, Jiaqiang Yan, David G. Mandrus, Stephen E. Nagler, Angel Rubio, James C. Hone, Cory R. Dean, Abhay N. Pasupathy, D. N. Basov
Summary: The researchers successfully created nanometer-scale lateral p-n junctions using graphene/alpha-RuCl3 heterostructure near graphene nanobubbles. Through STM/STS and s-SNOM techniques, they investigated the electronic and optical responses of nanobubble p-n junctions, achieving p-n junctions with a width of around 3 nm and an electric field of approximately 10(8) V/m. The study also utilized ab initio density functional theory calculations to corroborate experimental data and provide insights into charge transfer mechanisms in 2D materials.
Article
Chemistry, Multidisciplinary
Qiucheng Li, Xiaolong Liu, Eden B. Aklile, Shaowei Li, Mark C. Hersam
Summary: The study reports the self-assembly of mixed-dimensional lateral heterostructures consisting of 2D metallic borophene and 1D semiconducting armchair-oriented graphene nanoribbons (aGNRs). The systematic study and refinement of on-surface polymerization process from monomers to organometallic intermediates to demetallization result in borophene/aGNR lateral heterojunctions with structurally and electronically abrupt interfaces, providing insight for precise nanoelectronics.
Article
Chemistry, Multidisciplinary
Andrey K. Gatin, Sergey Y. Sarvadii, Nadezhda V. Dokhlikova, Vasiliy A. Kharitonov, Sergey A. Ozerin, Boris R. Shub, Maxim V. Grishin
Summary: The oxidation of Ni nanoparticles supported on highly oriented pyrolytic graphite under low exposure to oxygen was studied. It was found that charge transfer effects at the Ni-C interface influenced the surface activity of the nanoparticles. O-2 dissociation and Ni oxidation occurred only at the top of the nanoparticle.
Article
Chemistry, Physical
Fabio Ronci, Stefano Colonna, Roberto Flammini, Maurizio De Crescenzi, Manuela Scarselli, Matteo Salvato, Isabelle Berbezier, Holger Vach, Paola Castrucci
Summary: In this paper, an in-depth study was conducted on the growth of nickel silicides under different conditions. It was found that two different nickel silicides form progressively as the annealing temperature increases. The presence of a graphene layer does not alter the nature of the silicide phases but affects the morphology of the silicide overlayer.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Renan Villarreal, Pin-Cheng Lin, Fahim Faraji, Nasim Hassani, Harsh Bana, Zviadi Zarkua, Maya N. Nair, Hung-Chieh Tsai, Manuel Auge, Felix Junge, Hans C. Hofsaess, Stefan De Gendt, Steven De Feyter, Steven Brems, E. Harriet Ahlgren, Erik C. Neyts, Lucian Covaci, Francois M. Peeters, Mehdi Neek-Amal, Lino M. C. Pereira
Summary: The study found that the size ratio of nanobubbles formed on graphene surfaces is influenced by the bubble radius, with larger ratios observed when the radius approaches 1 nm. The stability and size ratio of the bubbles are also dependent on the substrate and trapped elements, indicating a correlation with the atomic compressibility of the noble gases and adhesion energies between materials.
Article
Physics, Applied
Tae Soo Kim, Taemin Ahn, Tae-Hwan Kim, Hee Cheul Choi, Han Woong Yeom
Summary: Recent research shows that atomic oxygen can oxidize epitaxial graphene in a vacuum without causing damage. In this study, the effects of chemisorbed atomic oxygen on the electronic properties of graphene were investigated using scanning tunneling microscopy (STM). The results reveal that oxygen atoms can modify the electronic states of graphene, creating a bandgap at its Dirac point. Additionally, it was demonstrated that selective desorption or hopping of oxygen atoms can be induced with atomic precision using appropriate bias sweeps with an STM tip. These findings suggest the potential for atomic-scale tailoring of graphene oxide and the development of graphene-based atomic-scale electronic devices.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Tobias Preis, Sasha Vrbica, Jonathan Eroms, Jascha Repp, Jan M. van Ruitenbeek
Summary: One-dimensional diffusion of Co adatoms on graphene nanoribbons has been induced and studied using scanning tunnelling microscopy (STM). The observed current-induced motion of Co atoms along the nanoribbons follows a distribution expected for a thermally activated one-dimensional random walk, indicating significantly elevated temperatures of the nanoribbons compared to the underlying Au substrate. This model system has potential for further development in studying electromigration at the single-atom level.
Article
Chemistry, Multidisciplinary
Daniel J. Rizzo, Jingwei Jiang, Dharati Joshi, Gregory Veber, Christopher Bronner, Rebecca A. Durr, Peter H. Jacobse, Ting Cao, Alin Kalayjian, Henry Rodriguez, Paul Butler, Ting Chen, Steven G. Louie, Felix R. Fischer, Michael F. Crommie
Summary: The paper discusses the fabrication and characterization of deterministic GNR quantum dots with orbital character defined by zero-mode states from nontrivial topological interfaces. The results are supported by density-functional theory and tight-binding calculations, showing that the orbital hopping between topological zero-mode states can be tuned based on the bonding geometry of the interconnecting region. This study demonstrates the potential of topological zero modes in designer quantum dots and advanced electronic devices.
Article
Chemistry, Physical
Srdjan Stavric, Valeria Chesnyak, Simone del Puppo, Mirco Panighel, Giovanni Comelli, Cristina Africh, Zeljko Sljivancanin, Maria Peressi
Summary: The role of moire graphene superstructures in promoting confined adsorption of different metal atoms is investigated using density functional theory calculations and scanning-tunneling microscopy measurements. The results show that the moire pattern acts as a nanostructured template that confines single metal atoms and few atoms clusters on a 2D support. The confinement is selective and depends on the atomic species, with some preferring to adsorb on ridges and others on valleys. The selectivity also affects the diffusion of the adsorbates, resulting in unidirectional mass transport on the 2D support.
Article
Chemistry, Multidisciplinary
Mehdi Bouatou, Cyril Chacon, Aleksander Bach Lorentzen, Huu Thoai Ngo, Yann Girard, Vincent Repain, Amandine Bellec, Sylvie Rousset, Mads Brandbyge, Yannick J. Dappe, Jerome Lagoute
Summary: This study demonstrates the realization of nanopatterning of nitrogen dopants in graphene by using a submonolayer of self-assembled physisorbed molecules as a resist during post-synthesis nitrogen doping process. The resulting domains with different nitrogen concentrations enable the formation of n-n' and p-n junctions in graphene. The electronic properties of the junctions were measured at the atomic scale using scanning tunneling microscopy, revealing an intrinsic width of approximately 7 nm corresponding to a sharp junction regime.
ADVANCED FUNCTIONAL MATERIALS
(2022)
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.
Article
Chemistry, Multidisciplinary
Bing Liu, Guangyao Miao, Weiliang Zhong, Xiaochun Huang, Nuoyu Su, Jiandong Guo, Weihua Wang
Summary: By utilizing surface-supported metal-organic frameworks, we have successfully manipulated the electronic and magnetic properties of top-Ni atoms, demonstrating atomic-scale control over coordinated metal atoms in MOFs.
Article
Chemistry, Physical
B. V. Andryushechkin, V. M. Shevlyuga, T. V. Pavlova, G. M. Zhidomirov, K. N. Eltsov
JOURNAL OF CHEMICAL PHYSICS
(2018)
Review
Chemistry, Physical
B. V. Andryushechkin, T. V. Pavlova, K. N. Eltsov
SURFACE SCIENCE REPORTS
(2018)
Article
Chemistry, Physical
Boris V. Andryushechkin, Vladimir M. Shevlyuga, Tatiana V. Pavlova, Georgy M. Zhidomirov, Konstantin N. Eltsov
JOURNAL OF PHYSICAL CHEMISTRY C
(2018)
Article
Chemistry, Physical
Nikita S. Komarov, Tatiana V. Pavlova, Boris V. Andryushechkin
JOURNAL OF PHYSICAL CHEMISTRY C
(2019)
Article
Chemistry, Physical
T. Pavlova, V. M. Shevlyuga, B. Andryushechkin, G. M. Zhidomirov, K. N. Eltsov
APPLIED SURFACE SCIENCE
(2020)
Article
Physics, Multidisciplinary
S. L. Kovalenko, T. V. Pavlova, B. V. Andryushechkin, K. N. Eltsov
Article
Physics, Multidisciplinary
S. L. Kovalenko, T. V. Pavlova, B. V. Andryushechkin, G. M. Zhidomirov, K. N. Eltsov
PHYSICS OF WAVE PHENOMENA
(2020)
Article
Chemistry, Physical
B. Andryushechkin, T. Pavlova
Summary: This paper investigates the adsorption behavior of molecular iodine on the Ag(111) surface at room temperature. Experimental and theoretical calculations reveal that iodine forms various structures on the surface at different coverage, including uniaxially compressed phases, porous phases, and hexagonal moire-like phases. DFT calculations explain the anomalous atomic corrugation of the hexagonal phases. Additionally, the formation of two-dimensional islands of silver iodide is observed at higher iodine coverage.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Chemistry, Physical
T. V. Pavlova, V. M. Shevlyuga, B. V. Andryushechkin, K. N. Eltsov
Summary: This study reports the removal of individual halogen atoms from Si(100)-2x1-Cl and -Br surfaces in STM. The charge states of DBs formed on the Si surface can be manipulated, allowing for tuning the reactivity of the Cl- and Br-terminated surfaces.
APPLIED SURFACE SCIENCE
(2022)
Article
Physics, Multidisciplinary
V. V. Glushkov, V. S. Zhurkin, A. D. Bozhko, O. E. Kudryavtsev, B. V. Andryushechkin, N. S. Komarov, V. V. Voronov, N. Yu. Shitsevalova, V. B. Filipov
Summary: The galvanomagnetic characteristics of SmB6 single crystals were studied at different temperatures and crystal faces orientations. The results showed that the surface conductivity in SmB6 is influenced by both the orientation of the surface and the processing method. Etching of polar surfaces led to changes in density and mobility of surface charge carriers.
Article
Chemistry, Physical
Nikita S. Komarov, Vladimir M. Shevlyuga, Boris A. Loginov, Boris Andryushechkin
Summary: Adsorption of molecular chlorine on the Ag(110) surface was characterized using low-temperature scanning tunneling microscopy, low-energy electron diffraction, and density functional theory calculations. The adsorption behavior was found to be dependent on coverage, with p(2 x 1) and p(3 x 1) phases observed at 1/2 ML coverage. The formation of these structures was attributed to adsorbate induced added-row reconstruction rather than simple overlayer formation. At higher coverages, a quasi-hexagonal phase and stripe-like structures aligned parallel to the ⟨001⟩ direction were observed.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Physics, Multidisciplinary
B. V. Andryushechkin, B. A. Loginov
Summary: Structural transformations under chlorine adsorption on the Ag(100) surface were investigated using scanning tunneling microscopy (STM) and density functional theory (DFT) calculations. DFT calculations revealed that the preferred adsorption site for chlorine atoms is the fourfold hollow position. STM studies showed a disorder-order structural phase transition at increasing chlorine coverage, resulting in the formation of a c(2 x 2) structure on the Ag(100) surface. The critical coverage for ordering was found to be approximately 0.34-0.35 monolayer (ML).
PHYSICS OF WAVE PHENOMENA
(2023)
Article
Chemistry, Physical
N. S. Komarov, T. Pavlova, B. Andryushechkin
Summary: A traditional surface science approach was used to create and study an atomically thin NiI2 film on a nickel substrate formed by molecular iodine adsorption. Different phases were observed when iodine adsorption occurred at different temperatures, with complex LEED patterns and superstructures observed at coverages exceeding 0.40 ML. Prolonged iodine dosing led to the nucleation of nickel iodide islands and the growth of a 2D atomically thin iodide film partially exfoliated from the substrate.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
T. Pavlova, V. M. Shevlyuga, B. Andryushechkin, K. N. Eltsov
Article
Chemistry, Physical
Jie Sheng, Jingshan He, Dun Ma, Yuanbo Wang, Wu Shao, Tian Ding, Ronghao Cen, Jingwen He, Zhihao Deng, Wenjun Wu
Summary: This study presents an innovative approach to improve the photovoltaic conversion characteristics and stability of perovskite solar cells through carbon electrode interface modification. By in-situ polymerization and carbonization on the surface of nano-graphite, a dendritic structure carbon electrode is formed, reducing the work function and aligning the energy levels with perovskite. This leads to improved charge and hole collection efficiency, resulting in increased photovoltaic conversion efficiency. Furthermore, the modified carbon electrode-based perovskite solar cells exhibit exceptional stability, maintaining high efficiency even without encapsulation.
Article
Chemistry, Physical
Guodong Shi, Jian Song, Xiaoxiao Tian, Tongtong Liu, Zhanjun Wu
Summary: This study demonstrates the improvement of mechanical properties and reduction of coefficient of thermal expansion (CTE) in graphene oxide (GO)/epoxy (EP) nanocomposites by enhancing the interface between GO and EP through functionalization and incorporating rigid-flexible interphases. The results reveal that the SiO2-PEA-GO hybrid exhibits better strengthening and toughening effects, as well as lower CTE, compared to the PEA-GO hybrid due to the presence of rigid-flexible interfaces with higher bonding strength and better energy dissipation mechanisms. Additionally, the nanocomposites with longer polyetheramine (PEA) molecules in the rigid-flexible interphases demonstrate higher strength and toughness, while maintaining a lower CTE. This work provides a promising strategy for constructing adjustable flexible-rigid interfacial structures and offers potential in developing GO/EP nanocomposites with high mechanical properties and low CTE.
Article
Chemistry, Physical
Rafal Janus, Sebastian Jarczewski, Jacek Jagiello, Piotr Natkanski, Mariusz Wadrzyk, Marek Lewandowski, Marek Michalik, Piotr Kustrowski
Summary: In this study, a facile procedure for the synthesis of CMK-1 and CMK-2 carbon replicas was developed. The method utilizes basic laboratory equipment and a renewable carbon source, and operates under mild conditions. The resulting carbon mesostructures exhibit exquisite replication fidelity and structural homogeneity, making them suitable for applications in various fields.
Article
Chemistry, Physical
Anqi Wang, Connor J. MacRobbie, Alex Baranovsky, Jean-Pierre Hickey, John Z. Wen
Summary: In this study, a novel polymer-free nanothermite aerogel with a wide range of nanoparticle loading was fabricated via a new additive manufacturing process. The SEM images showed a unique porous structure formed by extra thin rGO sheets, wrapping individual nanothermite clusters. The DSC-TGA results and high-speed combustion videos confirmed the enhanced energetic performance of the printed specimen.
Article
Chemistry, Physical
Wanze Wu, Misheng Zhao, Shiwei Miao, Xiaoyan Li, Yongzhong Wu, Xiao Gong, Hangxiang Wang
Summary: Superhydrophobic solar-driven interfacial evaporator is an energy-efficient technology for seawater desalination, which is easily fabricated using robust photothermal superhydrophobic coating and substrate. The created bifunctional coating on the melamine sponge substrate shows stable and highly efficient photothermal and superhydrophobic performance for seawater desalination. This superhydrophobic solar-driven interfacial evaporator is expected to have wide applications in seawater desalination.
Article
Chemistry, Physical
Zichen Xiang, Zhi Song, Tiansheng Wang, Menghang Feng, Yijing Zhao, Qitu Zhang, Yi Hou, Lixi Wang
Summary: This study presents a co-electrospinning synthesis strategy to fabricate lightweight and porous Co@C composite nanofibres with wideband microwave attenuation capacity. The addition of MOF-derived Co additives enhances the low-frequency absorption performance.
Article
Chemistry, Physical
J. Snow, C. Olson, E. Torres, K. Shirley, E. Cazalas
Summary: This study investigates the use of a perovskite-based graphene field effect transistor (P-GFET) device for X-ray detection. The sensitivity and responsivity of the device were found to be influenced by factors such as X-ray tube voltage, current, and source-drain voltage. Simulation experiments were conducted to determine the dose rate and energy incident on the device during irradiation.
Article
Chemistry, Physical
Zuzana Jankovska, Lenka Matejova, Jonas Tokarsky, Pavlina Peikertova, Milan Dopita, Karolina Gorzolkova, Dominika Habermannova, Michal Vastyl, Jakub Belik
Summary: This study provides new insights into microwave-assisted pyrolysis of scrap tyres, demonstrating that it can produce microporous carbon black with potential application in xylene adsorption. Compared to conventional pyrolysis, microwave pyrolysis requires less time and energy while maintaining similar adsorption capacity.
Article
Chemistry, Physical
Max Bommert, Bruno Schuler, Carlo A. Pignedoli, Roland Widmer, Oliver Groning
Summary: A detailed understanding of the interaction between molecules and two-dimensional materials is crucial for incorporating functional molecular films into next-generation 2D material-organic hybrid devices. This study compares the energy level alignment of different-sized fullerenes on a Moire superstructure and finds that C-84 fullerenes can be either neutral or negatively charged depending on slight variations of the electrostatic potential. This discovery suggests a new path to achieve ambipolar charge transfer without overcoming the electronic gap of fullerenes.
Article
Chemistry, Physical
Yuanjing Cheng, Xianxian Sun, Ye Yuan, Shuang Yang, Yuanhao Ning, Dan Wang, Weilong Yin, Yibin Li
Summary: The dual-structure aerogel (GS) consisting of flexible silica fibers and graphene honeycomb structures exhibits excellent resilience, flexibility, and reliability. It also shows remarkable wave absorbing performance, making it an ideal candidate for microwave absorption applications such as flexible electronics and aerospace.
Article
Chemistry, Physical
Shuyu Fan, Yinong Chen, Shu Xiao, Kejun Shi, Xinyu Meng, Songsheng Lin, Fenghua Su, Yifan Su, Paul K. Chu
Summary: Graphene coatings are promising solid lubrication materials due to their mechanical properties. This study presents a new method for in situ deposition of high-quality graphene coatings on hard substrates using NiCo solid solution and competitive reaction strategies. The graphene coating deposited on substrates with deep NiCo solid solution demonstrates superior low-friction and durability.
Article
Chemistry, Physical
Mengdi Wang, Sanyin Qu, Yanling Chen, Qin Yao, Lidong Chen
Summary: The improved thermoelectric properties of conducting polymers are achieved by selectively capturing single-walled carbon nanotubes (SWNTs) in a conducting polymer film, leading to increased carrier mobility and reduced thermal conductivity. The resulting composite film exhibits significantly higher electrical conductivity and lower thermal conductivity compared to films with a mixture of SWNTs. This work provides a convenient and efficient method to enhance the thermoelectric properties of conducting polymers.
Review
Chemistry, Physical
Heng Wei, Weihua Li, Kareem Bachagha
Summary: This article reviews the research progress of carbon nanotube-based microwave absorbing materials (MAMs) in recent years, covering the fundamental theory, design strategies, synthesis methods, and future development directions.
Article
Chemistry, Physical
Chenguang Shi, Junlong Huang, Zongheng Cen, Tan Yi, Shaohong Liu, Ruowen Fu
Summary: This study developed a high-performance Li metal host material, which achieved dendrite-free Li deposition with a low nucleation overpotential and high Coulombic efficiencies through the combination of Ti3C2-g-PV4P sheets and Ag nanoparticles. The full cells assembled with the Li@host anode and LiFePO4 cathode exhibited high discharge capacity and excellent cycling stability, demonstrating a perspective design for future energy storage devices.
Article
Chemistry, Physical
Tomotaro Mae, Kentaro Kaneko, Hiroki Sakurai, Suguru Noda
Summary: A new partial prelithiation method for SiO/C-CNT electrodes was developed, which showed reduced irreversible capacity and achieved high energy densities with good reversibility. The method allows for precise control of the degree of prelithiation and is applicable to various chemistries.
