Chengyong Xu

ORCID: 0009-0004-9203-890X
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Research Areas
  • Graphene research and applications
  • Molecular Junctions and Nanostructures
  • Quantum and electron transport phenomena
  • Surface Chemistry and Catalysis
  • Advanced ceramic materials synthesis
  • MXene and MAX Phase Materials
  • 2D Materials and Applications
  • Surface and Thin Film Phenomena
  • Innovative concrete reinforcement materials
  • Aluminum Alloys Composites Properties
  • Powder Metallurgy Techniques and Materials
  • Advanced materials and composites
  • Structural Behavior of Reinforced Concrete
  • Spectroscopy and Quantum Chemical Studies
  • Porphyrin and Phthalocyanine Chemistry
  • Geotechnical Engineering and Soil Stabilization
  • Organic Electronics and Photovoltaics
  • Enzyme Catalysis and Immobilization
  • Neural Networks and Reservoir Computing
  • Carbon Nanotubes in Composites
  • Advanced Memory and Neural Computing
  • Chalcogenide Semiconductor Thin Films
  • Conducting polymers and applications
  • Enzyme Production and Characterization
  • Concrete and Cement Materials Research

Jiangsu University
2023-2025

Suzhou Institute of Nano-tech and Nano-bionics
2025

Chinese Academy of Sciences
2025

Suzhou University of Science and Technology
2025

University of Science and Technology of China
2025

Nanchang Institute of Technology
2017-2024

Duy Tan University
2020

Baylor University
2014-2015

Second Artillery General Hospital of Chinese People's Liberation Army
2015

Peking University
2010-2012

Opening a sizable band gap without degrading its high carrier mobility is as vital for silicene graphene to application high-performance field effect transistor (FET). Our density functional theory calculations predict that opened in by single-side adsorption of alkali atom result sublattice or bond symmetry breaking. The size controllable changing the coverage, with an impressive maximum up 0.50 eV. ab initio quantum transport simulation bottom-gated FET based on sodium-covered reveals gap,...

10.1038/srep00853 article EN cc-by-nc-sa Scientific Reports 2012-11-14

By performing first-principle quantum transport calculations, we predict a giant magnetoresistance in zigzag silicene nanoribbons (ZSiNRs) connecting two semi-infinite electrodes through switch of the edge spin direction ZSiNRs. Spin-filter efficiency both antiferromagnetic and ferromagnetic ZSiNRs is sign-changeable with bias voltage. Therefore, potential application spintronics devices suggested.

10.1039/c2nr00037g article EN Nanoscale 2012-01-01

By using first-principles calculations, we predict that an in-plane homogenous electrical field can induce half-metallicity in hydrogen-terminated zigzag silicene and germanene nanoribbons (ZSiNRs ZGeNRs). A dual-gated finite ZSiNR device reveals a nearly perfect spin-filter efficiency of up to 99% while quadruple-gated serves as effective spin effect transistor (FET) with on/off current ratio over 100 from ab initio quantum transport simulation. This discovery opens novel prospect spintronics.

10.1142/s1793292012500373 article EN NANO 2012-08-08

We have investigated the electronic properties of 1-, 2-, and 3-layer graphene upon surface adsorption halogen molecules by means density functional calculations. The most stable site is parallel to with diatomic atoms centered over adjacent carbon rings. Bader analysis shows a large charge transfer between F2 graphene, which significantly extends fluorine bond length, while only small amounts are transferred Cl2, Br2, I2. Adsorbed halogens alter pushing Fermi level down bringing forth an...

10.1021/acs.jpcc.5b05595 article EN The Journal of Physical Chemistry C 2015-07-09

Abstract Optoelectronic synaptic devices are promising candidate components for brain‐like efficient neuromorphic computing systems. The development of highly‐selective near‐infrared (NIR) optoelectronic is important realizing more optical computing, night monitoring, and robot visual perception. In this work, ultralow‐power (56 aJ per light pulse), NIR (≈850 nm) transistor based on carbon nanotube thin film transistors developed by modification the organic photosensitive material in device...

10.1002/smll.202412324 article EN Small 2025-04-08

We have investigated the effect of uniform plane strain on electronic properties monolayer 1T-TiS<sub>2</sub>using first-principles calculations. With appropriate tensile strain, material can be transformed from a semimetal to direct band gap semiconductor.

10.1039/c5ra16877e article EN RSC Advances 2015-01-01

Based on first-principles calculations, we investigate the electron transport properties of parallel single-walled carbon nanotube contact. A significant negative differential resistance (NDR) behavior is found due to staggered gratings in energy space and standing waves real two tubes induced by bias. Such a NDR effect robust against contact length, tube diameter, shape end, difference electrodes. Because no bridging molecule used, structure this device simpler compared with ordinary...

10.1103/physrevb.83.155442 article EN Physical Review B 2011-04-26

We present a theoretical investigation on the electronic properties and formation energetics of pnictogen substitution into graphene monovacancy. Our work elucidates fundamental interactions that occur between dopant graphene, which ultimately dictate observed behavior material. find linear trend for energy proceeding down group 15 periodic table. Further, we observe protrusion at monovacancy site, is particularly conspicuous larger pnictogens. This blistering can be attributed to charge...

10.1021/cm502754y article EN Chemistry of Materials 2014-09-25

The extended time window and theoretic reduction in hemorrhage make mechanical strategies an attractive approach for the treatment of patients with ischemic stroke. However, a limited availability suitable animal models cerebrovascular thrombosis has hampered study novel endovascular interventions. aim present was to develop new technique site-specific placement thrombus canine model that would allow evaluation thrombectomy clot retrieval methods visualization dislocation or fragmentation...

10.1371/journal.pone.0142251 article EN cc-by PLoS ONE 2015-11-06

CNT/GO/PEG fibers were prepared by an in situ impregnation strategy. The presence of GO increased interfacial contacts and volume within the CNT/GO multilevel network, resulting high PEG loading, enthalpy lower thermal conductivity.

10.1039/d4tc03006k article EN cc-by-nc Journal of Materials Chemistry C 2024-01-01

We propose a novel single-molecule organic field effect transistor (FET) fabricated via covalent functionalization of an individual metallic single-walled carbon nanotube (SWCNT). The transfer characteristic this FET is calculated by using ab initio quantum transport calculations. Because the significantly reduced screening quasi-one-dimensional electrode and seamless connection between scattering region, optimized device shows excellent overall performance over experimental transistors....

10.1021/jp106535q article EN The Journal of Physical Chemistry C 2010-08-30

10.1016/j.physe.2018.04.013 article EN Physica E Low-dimensional Systems and Nanostructures 2018-04-11

Two-dimensional binary hydrogen-bonded organic frameworks constructed from 1,3,5-benzenetricarboxylic acid (TMA) and 4,4'-biphenyldicarboxylic (BDA) on highly oriented pyrolytic graphite (HOPG) were investigated by scanning tunneling microscopy (STM) in heptanoic octanoic solvents. High-resolution STM observations demonstrated that various assemblies of networks are strongly dependent the nature solvent. Well-ordered porous rectangular flowerlike revealed at acid/HOPG interface, whereas two...

10.1039/c9cp01395d article EN Physical Chemistry Chemical Physics 2019-01-01

Plain concrete (PC) has the disadvantages of easy cracking and low resistance to deformation. In practical engineering, steel fiber or polymer is usually selected improve tensile crack concrete. this study, polypropylene (PPF) was added with content 0, 0.6, 0.9, 1.5 kg/m3. The compressive flexural tests PC PPF-reinforced (PPFRC) at 14, 28, 60 days curing were conducted. As result, when PPF exceeds 1.2 kg/m3, workability became worse. strength PPFRC increased compared PC. However, increase...

10.1155/2022/4168918 article EN cc-by Geofluids 2022-09-23

The cooperative effect of hydrogen and halogen bonds on the 2‐dimensional molecular arrangement highly oriented pyrolytic graphite has been studied by scanning tunneling microscopy. microscopy observations demonstrate that self‐assembled hydrogen‐bonded chicken‐wire networks trimesic acid have significantly transformed after annealing introduction tribromobenzene guest molecules. Bromine atoms carboxyl groups were found to form 2 different multicomponent structures via bonds. Owing bonds,...

10.1002/sia.6459 article EN Surface and Interface Analysis 2018-05-17

Abstract In this work, a facile one-step hydrothermal method has been adopted to prepare Ni(OH) 2 directly deposited on Ni foam in ultrapure water. The phase structure and morphology composition of the in-situ grown /Ni (NF) were analyzed using an X-ray diffractometer (XRD) scanning electron microscope with energy disperse spectroscopy (SEM-EDS). results indicate that nanoflakes uniformly construct hierarchical structure, which favour full infiltration electrolyte, also beneficial reliable...

10.1088/1755-1315/585/1/012200 article EN IOP Conference Series Earth and Environmental Science 2020-10-01
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