A5008030323- Graphene research and applications
- 2D Materials and Applications
- Molecular Junctions and Nanostructures
- Surface Chemistry and Catalysis
- Topological Materials and Phenomena
- Catalytic Processes in Materials Science
- Force Microscopy Techniques and Applications
- Surface and Thin Film Phenomena
- Gold and Silver Nanoparticles Synthesis and Applications
- Boron and Carbon Nanomaterials Research
- Energy, Environment, Economic Growth
- Quantum and electron transport phenomena
- Electrocatalysts for Energy Conversion
- Plasmonic and Surface Plasmon Research
- Advanced biosensing and bioanalysis techniques
- Advancements in Battery Materials
- Quantum Dots Synthesis And Properties
- Semiconductor materials and devices
- Near-Field Optical Microscopy
- Catalysis and Oxidation Reactions
- Advanced Photocatalysis Techniques
- Fiscal Policy and Economic Growth
- MXene and MAX Phase Materials
- Amino Acid Enzymes and Metabolism
- Catalysis and Hydrodesulfurization Studies
University of Illinois Chicago
2019-2025
Zhengzhou Children's Hospital
2020-2024
Zhengzhou University
2020-2024
Renmin University of China
2022-2024
Anyang Normal University
2024
University of Chinese Academy of Sciences
2014-2023
Institute of Physics
2012-2020
Fritz Haber Institute of the Max Planck Society
2016-2020
Chinese Academy of Sciences
2005-2019
Technical Institute of Physics and Chemistry
2005-2019
Silicene, a two-dimensional (2D) honeycomb structure similar to graphene, has been successfully fabricated on an Ir(111) substrate. It is characterized as (√7×√7) superstructure with respect the substrate lattice, revealed by low energy electron diffraction and scanning tunneling microscopy. Such coincides (√3×√3) superlattice of silicene. First-principles calculations confirm that this (√3×√3)silicene/(√7×√7)Ir(111) configuration it buckled conformation. Importantly, calculated localization...
Germanene, a 2D honeycomb lattice analogous to graphene, is fabricated on Pt(111) surface. It exhibits buckled configuration with (3 × 3) superlattice coinciding the substrate's (√19 √19) superstructure. Covalent bonds exist throughout germanene layer. The resulting high-quality enables researchers explore fundamentals of and its potential applications.
Single-layer transition-metal dichalcogenides (TMDs) receive significant attention due to their intriguing physical properties for both fundamental research and potential applications in electronics, optoelectronics, spintronics, catalysis, so on. Here, we demonstrate the epitaxial growth of high-quality single-crystal, monolayer platinum diselenide (PtSe2), a new member layered TMDs family, by single step direct selenization Pt(111) substrate. A combination atomic-resolution experimental...
The generally accepted view that spin polarization in non-magnetic solids is induced by the asymmetry of global crystal space group has limited search for spintronics materials mainly to non-centrosymmetric materials. In recent times it been suggested originates fundamentally from local atomic site asymmetries and therefore centrosymmetric may exhibit previously overlooked polarizations. Here, using spin- angle-resolved photoemission spectroscopy, we report observation helical texture...
Two-dimensional (2D) honeycomb systems made of elements with d electrons are rare. Here, we report the fabrication a transition metal (TM) 2D layer, namely, hafnium crystalline layers on Ir(111). Experimental characterization reveals that Hf layer has its own lattice, morphologically identical to graphene. First-principles calculations provide evidence for directional bonding between adjacent atoms, analogous carbon atoms in Calculations further suggest freestanding could be ferromagnetic...
The synthesis and structures of graphene on Ru(0001) Pt(111), silicene Ag(111) Ir(111) the honeycomb hafnium lattice are reviewed. Epitaxy a transition metal (TM) substrate is promising method to produce variety two dimensional (2D) atomic crystals which potentially can be used in next generation electronic devices. This particularly valuable case producing 2D materials that do not exist 3D forms, for instance, silicene. Based intensive investigations epitaxial TM recent years, it known...
Abstract The chemical interrogation of individual atomic adsorbates on a surface significantly contributes to understanding the atomic-scale processes behind on-surface reactions. However, it remains highly challenging for current imaging or spectroscopic methods achieve such high spatial resolution. Here we show that single oxygen adatoms boron monolayer (i.e., borophene) can be identified and mapped via ultrahigh vacuum tip-enhanced Raman spectroscopy (UHV-TERS) with ~4.8 Å resolution bond...
The reversible control of a single spin an atom or molecule is great interest in Kondo physics and potential application based electronics. Here we demonstrate that the resonance manganese phthalocyanine molecules on Au(111) substrate have been reversibly switched off via robust route through attachment detachment hydrogen to magnetic core molecule. As further revealed by density functional theory calculations, even though total number electrons Mn ion remains almost same process, gaining...
Real space chemical analysis of two structurally very similar components, that is, regioisomers lies at the heart heterogeneous catalysis reactions, modern-age electronic devices, and various other surface related problems in science nanotechnology. One big challenges chemistry is to identify different adsorbed molecules analyze their properties individually. Herein, we report a topological regioisomers, trans- cis-tetrakispentafluorophenylporphodilactone ( cis-H2F20TPPDL) by high-resolution...
Tip-enhanced Raman spectroscopy (TERS), a cutting-edge near-field spectroscopic tool, provides invaluable chemical insight with impressive spatial resolution in chemistry-related fields such as molecular and catalytic systems, surface science, two-dimensional materials, biochemistry. High-resolution TERS, particular, which has advanced exceptionally the last five years, unique opportunity to scrutinize single molecules individually. Here, this perspective places emphasis on basic concepts...
Two-dimensional boron monolayers (i.e., borophene) hold promise for a variety of energy, catalytic, and nanoelectronic device technologies due to the unique nature boron–boron bonds. To realize its full potential, borophene needs be seamlessly interfaced with other materials, thus motivating atomic-scale characterization borophene-based heterostructures. Here, we report vertical integration tetraphenyldibenzoperiflanthene (DBP) measure angstrom-scale interfacial interactions ultrahigh-vacuum...
Bilayer (BL) two-dimensional boron (i.e., borophene) has recently been synthesized and computationally predicted to have promising physical properties for a variety of electronic energy technologies. However, the fundamental chemical BL borophene that form foundation practical applications remain unexplored. Here, we present atomic-level characterization using ultrahigh vacuum tip-enhanced Raman spectroscopy (UHV-TERS). UHV-TERS identifies vibrational fingerprint with angstrom-scale spatial...
Six types of moiré superstructures graphene on Ir(111) with different orientations (labeled as R0, R14, R19, R23, R26 and R30) are investigated by low-energy electron diffraction, scanning tunneling microscopy first-principles calculations. The superstructure R0 has remarkable diffraction spots deeper corrugation than that the other superstructures. A high-order commensurate (HOC) method is applied to produce a list all possible Ir(111). Several useful structural data including precise...
We report on the structural and electronic properties in heterostructure of graphene/silicon/Ir(111). A (√19 × √19)R23.41° superstructure is confirmed by low energy electron diffraction scanning tunneling microscopy its formation ascribed to silicon intercalation at interface between graphene Ir(111) substrate. The dI/dV measurements indicate that interaction Ir effectively decoupled after intercalation. Raman spectroscopy also reveals vibrational states graphene, G peak 2D peak, which...
A series of multiheteroatom porous carbon frameworks (MPCFs) is prepared successfully from the trimerization cyano groups our designed and synthesized 4,4'-(4-oxophthalazine-1,3(4H)-diyl)dibenzonitrile monomers subsequent ionothermal synthesis. Benefiting molecular engineering strategy, obtained MPCFs framework show a homogeneous distribution nitrogen oxygen heteroatoms at atomic level, confirmed by transmission electron microscopy mapping intuitively, thereby ensuring stability electrical...
N,O-Containing micropore-dominated materials have been developed successfully via temperature-dependent cross-linking of 4,4'-(dioxo-diphenyl-2,3,6,7-tetraazaanthracenediyl)dibenzonitrile (DPDN) monomers. By employing a molecular engineering strategy, we designed and synthesized series porous heteroatom-containing carbon frameworks (PHCFs), in which nitrogen oxygen heteroatoms are distributed homogeneously throughout the whole framework at atomic level, can ensure stability its electrical...
Wafer-scale monocrystalline two-dimensional (2D) materials can theoretically be grown by seamless coalescence of individual domains into a large single crystal. Here we present concise study the behavior crystalline 2D films using combination complementary in situ methods. Direct observation overlayer growth from atomic to millimeter scale and under model- industrially relevant conditions reveals influence film–substrate interaction on crystallinity film. In case weakly interacting...
Chemical reactions such as bond dissociation and formation assisted by localized surface plasmons (LSPs) of noble metal nanostructures hold promise in solar-to-chemical energy conversion. However, the precise control to activate a specific moiety molecule, presence multiple chemically equivalent parts within single is scarce due relatively large lateral distribution plasmonic field. Herein, we report plasmon-assisted molecular site (C–Si bond) polyfunctional molecule adsorbed on Cu(100)...
Ultrathin (monolayer) films of transition metal oxides grown on substrates have recently received considerable attention as promising catalytic materials, in particular for low-temperature CO oxidation. The reaction rate such systems often increases when the film only partially covers support, and effect is commonly attributed to formation active sites at metal/oxide boundary. By studying structure reactivity FeO(111) Pt(111), it shown that, independent coverage, oxidation takes place...
Flexible polycyclic aromatic hydrocarbons (PAHs) have experienced a surge of research with the discovery nanographenes that can be fabricated on surfaces. The flexibility in σ bonds within compounds is carefully managed order to induce particular binding configurations surface are capable undergoing cyclodehydrogenation reactions or exhibit unique material functionalities. structure adsorbed organic molecules essential design thin films these compounds. Highly localized chemical effects must...