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Frontiers of physics 2012年第4期7卷 453-460页

作者： Xiao-Dong Li Hong Zhang yong-jian tang Chao-Yang Wang College of Physical Science and Technology Sichuan UniversityChengdu 610065China Research Center of Laser Fusion China Academy of Engineering PhysicsMianyang 621900China

The adsorption and separation of CH4/H2 in two covalently-linked organic-inorganic hybrid frame- works polyoctaphenylsilsesquioxane （JUC-Z1） were computationally studied using the Grand Canon- ical Monte Carlo （GCMC） simulations. The results show that JUC-Z1 with Linde type A （LTA） and polycubane （zeolite code ACO） net topologies can adsorb up to 20.32, 18.57 mmol/g of CH4 and 19.04, 17.89 mmol/g of H2 at 298 K and 10 MPa, respectively. For the adsorption of binary mixture, the selectivity of CH4 over H2 in LTA-JUC-Zl decrease gradually with the increase of the pressure or the CH4 mole fraction of the mixture. As to ACO-JUC-Z1, the selectivity first increases at low pressure or CH4 mole fraction, and then begins to decrease with the further increase of the corresponding amount. Anyhow, the two materials both exhibit excellent adsorption and separation capacities of CH4/H2.

关键词： adsorption and separation selectivity GCMC octaphenylsilsesquioxane

DFT study of dihydrogen interactions with lithium containing organic complexes C4H4-mLim and C5H5-mLim （m = 1, 2）

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Frontiers of physics 2011年第2期6卷 231-235页

作者： Hong ZHANG Xiao-dong LI yong-jian tang College of Physical Science and Technology Sichuan University Chengdu 610065 China Research Center of Laser Fusion China Academy of Engineering Physics Mianyang 621900 China

The interactions of dihydrogen with lithium containing organic complexes C4H4-mLim and C5H5-mLi m （m = 1, 2） were studied by means of density functional theory （DFT） calculation. For all the complexes considered, each bonded lithium atom can adsorb up to five H2 molecules with the mean binding energy of 0.59 eV/H2 molecule. The interactions can be attributed to the charge transfer from the H2 bonding orbitals to the Li 2s orbitals. The kinetic stability of these hydrogen-covered organolithium molecules is discussed in terms of the energy gap between the highest occupied molecular orbital （HOMO） and lowest unoccupied molecular orbital （LUMO）. The results indicate that these organiclithium structures can perhaps be used as building units for potential hydrogen storage materials.

关键词： adsorption density functional calculations organolithium molecule hydrogen storage

Effects of various defects on the electronic properties of single-walled carbon nanotubes： A first principle study

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Frontiers of physics 2014年第2期9卷 200-209页

作者： Qing-Xiao Zhou Chao-Yang Wang Zhi-Bing Fu yong-jian tang Hong Zhang College of Physical Science and Technology Sichuan University Chengdu 610065 China Research Center of Laser Fusion China Academy of Engineering Physics Mianyang 621900 China Key Laboratory of High Energy Density Physics and Technology of Ministry of Education Sichuan University Chengdu 610064 China

The geometries,formationenergies and electronic band structures of （8, 0） and （14, 0） singlewailed carbon nanotubes （SWCNTs） with various defects, inehlding vaeaney, Stone-Wales defect, and octagon pentagon pair defect, have been investigated within the framework of the density- huictional theory （DFT）, and the influence of the concentration within the same style of deflect on the physical and chenfical properties of SWCNTs is also studied. The results suggest that the existeilcc of vacancy and octagon-pentagon pair deflect both reduce the band gap, whereas the SW- defect induces a band gap opening in CNTs. More int, erestingly, the band gaps of （8, 0） and （14, 0） SWCNTs eonfigurations with two octagon pentagon pair defect presents 0.517 eV and 0.163/eV, which arc a little smaller than the perfectt CNTs. Furthermore, with the concentration of defects increasing, there is a decreasing of band ga.p making the two types of SWCNTs change from a semiconductor to a metallic conductor.

关键词： carbon nanotube density functional theory defect electronic structure

Mechanical properties and surface characteristics of SiC fibers irradiated by swift heavy ions

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Nuclear Science and Techniques 2022年第9期33卷 37-47页

作者： Li-Qing Zhang Chong-Hong Zhang Chen-Chun Hao Guo-Dong Hu Zheng-Dong Feng yong-jian tang Wen-Kun Zhu jian-Yang Li Qing Huang Southwest University of Science and Technology Mianyang 621010China Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China Ningbo Institute of Materials Technology and Engineering Chinese Academy of SciencesNingbo 315201China

SiC fibers were irradiated by 414.4-MeV^(112)Sn^(27.3+)ions to different fluences(5.0×10^(12),6.0×10^(13),1.6×10^(14),and 1.92×10^(15)ions/cm^(2)).^(112)Sn^(27.3+)deposited its energy mainly via electron energy loss and passed through the SiC ***,the mechanical properties and surface characteristics of fibers were studied using a specific single filament tensile test and field emission scanning electron *** revealed that the carbon concentration on the fiber surface increased while the silicon concentration ***,the addition of oxygen was found to correlate with an increase in ion ***,the fiber surface morphology of the least fluence(5.0×10^(12)ions/cm^(2))irradiated specimen displayed no obvious changes and its diameter was slightly *** successive increases of ion fluence,large grains/bubbles on the fiber surface first appeared and then disappeared,and the diameter of fibers evidently ***,at the highest fluence(1.92×10^(15)Sn ions/cm^(2))irradiated specimen,some fibers were brittle *** a result,the mean tensile strength and the average elastic modulus of the fibers generally decreased with respect to the ion *** degradation mechanisms of mechanical properties of SiC fibers under irradiation are discussed in detail.

关键词： SiC fibers Swift-heavy-ion irradiation FE SEM Tensile test

Disk-shaped Symmetric Hexa-substituted Triphenylene Derivatives： Synthesis, Physical Properties and Self-assembly

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Chemical Research in Chinese Universities 2013年第3期29卷 495-499页

作者： WANG Dong MI yong-sheng tang jian-kai LIANG Peng-xia JIN Zhao-kui YANG Zhou YANG Huai Department of Materials Physics and Chemistry School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 P R. China

A series of triphenylene derivatives with six symmetric substituents was synthesized from hexabromotriphenylene. The synthesis was conducted by six-fold palladium-catalyzed Hagihara-Sonogashira crosscoupling reactions to yield the hexa-alkynyl substituted triphenylene derivatives of HTPI, HTP2, HTP3 and HTP4. The six symmetric substituents can not only endow the triphenylene the longer π-conjugated range, but also increase the solubility of the compounds. Their photophysical, electrochemical, thermal properties were investigated respectively. With the comparison of their properties, the structure-property relationships were established which demonstrated the influences of different substituents on the electronic nature and the mesomorphic phase of these disk-shaped molecules. In addition, with the scanning electron microscopy（SEM） and polarized optical microscopy（POM） characterization, the self-assembly behaviors of the compounds were also investigated.

关键词： Triphenylene π-Conjugated range Photophysical property Electrochemical property Self-assembly

Landscape of four different stages of human gastric cancer revealed by single-cell sequencing

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World Journal of Gastrointestinal Oncology 2025年第2期17卷 179-197页

作者： Xu-Shan tang Chun-Lei Xu Na Li jian-Qing Zhang yong tang Department of Gastroenterology Tumor Hospital Affiliated to Xinjiang Medical UniversityUrumqi 830011Xinjiang Uighur Autonomous RegionChina Department of Outpatient First Affiliated Hospital of Xinjiang Medical UniversityUrumqi 830011Xinjiang Uighur Autonomous RegionChina

BACKGROUND Gastric cancer(GC)poses a substantial risk to human health due to its high prevalence and mortality ***,current therapeutic strategies remain ***-cell RNA sequencing(scRNA-seq)offers the potential to provide comprehensive insights into GC *** To explore the distribution and dynamic changes of cell populations in the GC tumor microenvironment using scRNA-seq *** Cancerous tissues and paracancerous tissues were obtained from patients diagnosed with GC at various stages(I,II,III,and IV).Single-cell suspensions were prepared and analyzed using scRNA-seq to examine transcriptome profiles and cell-cell ***,quantitative real-time polymerase chain reaction(qRT-PCR)and flow cytometry were applied for measuring the expression of cluster of differentiation(CD)2,CD3D,CD3E,cytokeratin 19,cytokeratin 8,and epithelial cell adhesion *** Transcriptome data from 73645 single cells across eight tissues of four patients were categorized into 25 distinct cell clusters,representing 10 different cell *** were observed in these cell type *** adjacent epithelial cells in stages II and III exhibited a degenerative ***,the quantity of CD4 T cells and CD8 T cells were evidently elevated in cancerous *** analysis displayed a remarkable increase in interaction between B cells and other mast cells in stages II,III,and IV of *** findings were further validated through qRT-PCR and flow cytometry,demonstrating elevated T cells and declined epithelial cells within the cancerous *** This study provides a comprehensive analysis of cell dynamics across GC stages,highlighting key interactions within the tumor *** findings offer valuable insights for developing novel therapeutic strategies.

关键词： Gastric cancer Single-cell RNA sequencing Tumor microenvironment Cancer progression Cell-cell interactions

Advancing gravitational theory through the tetrahedral constellation gravitational wave observatory

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Science China(Physics,Mechanics & Astronomy) 2025年第2期68卷 197-198页

作者： Yun-yong Wang Zhou-jian Cao Institute for Frontiers in Astronomy and Astrophysics Beijing Normal UniversityBeijing102206China

The Tetrahedral Constellation Gravitational Wave Observatory(TEGO)[1]represents a significant leap forward in gravitational wave detection,advancing our understanding of gravitational *** introducing a fourth spacecraft to form a tetrahedral configuration,TEGO enhances traditional triangular setups,enabling the simultaneous sensitivity to all six gravitational wave polarization modes,including those not predicted by general relativity.

关键词： wave polarization theory

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Growth Mechanism of Vertically Aligned Carbon Nanotube Arrays

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Chinese Journal of Chemical Physics 2015年第5期28卷 -页

作者： Ji-cheng Zhang yong-jian tang yong Yi Min-jie Zhou Kang-fu Ma Wei-dong Wu Chao-yang Wang Science and Technology on Plasma Physics Laboratory Research Center of Laser Fusion China Academy of Engineering Physics Mianyang 621900 China College of Material Science and Engineering Southwest University of Science and TechnologyMianyang 621010 China

Vertically aligned multi-walled carbon nanotube arrays grown on quartz substrate are obtained by co-pyrolysis of xylene and ferrocene at 850 °C in a tube furnace. Raman spectroscopy and high resolution transmission electron microscopy measurements show that the single-walled carbon nanotubes are only present on top of vertically aligned multi-walled carbon nanotube arrays. It has been revealed that isolated single-walled carbon nanotubes are only present in those floating catalyst generated materials. It thus suggests that the single-walled carbon nanotubes here are also generated by floating catalyst. Vertically aligned carbon nanotube arrays on the quartz substrate have shown good orientation and good graphitization. Meanwhile, to investigate the growth mechanism, two bi-layers carbon nanotube films with different thickness have been synthesized and analyzed by Raman spectroscopy. The results show that the two-layer vertically aligned carbon nanotube films grow “bottom-up”. There are distinguished Raman scattering signals for the second layer itself, surface of the first layer, interface between the first and second layer, side wall and bottom surface. It indicates that the obtained carbon nanotubes follow the base-growth mechanism, and the single-walled carbon nanotubes grow from their base at the growth beginning when iron catalyst particles have small size. Those carbon nanotubes with few walls (typically <5 walls) have similar properties, which also agree with the base-growth mechanism.

关键词： Single-walled carbon nanotubes Multi-walled carbon nanotubes Growth mechanism Microstructure characterization

Activation of peroxymonosulfate by sustainable biomass-based carbon nanotubes for controlling the spread of plant viruses in water environments

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Journal of Environmental Sciences 2025年第3期149卷 99-112页

作者： jian tang Yujie Wang JunMa Yujie Chen Ming Chen College of Resources and Environment Yangtze UniversityWuhan 430100China Key Laboratory of Reservoir Aquatic Environment Chongqing Institute of Green and Intelligent TechnologyChinese Academy of SciencesChongqing 400714China Chongqing School University of Chinese Academy of SciencesChongqing 400714China School of Geography and Tourism Chongqing Normal UniversityChongqing 400714China

With the increasing demand for water in hydroponic systems and agricultural irrigation,viral diseases have seriously affected the yield and quality of *** removing plant viruses in water environments,virus transmission can be prevented and agricultural production and ecosystems can be *** so far,there have been few reports on the removal of plant viruses in water ***,in this study,easily recyclable biomass-based carbon nanotubes catalysts were synthesized with varying metal activities to activate peroxymonosulfate(PMS).Among them,the magnetic 0.125Fe@NCNTs-1/PMS system showed the best overall removal performance against pepper mild mottle virus,with a 5.9 log_(10)removal within 1 ***,the key reactive species in the 0.125Fe@NCNTs-1/PMS system is^(1)O_(2),which can maintain good removal effect in real water matrices(river water and tap water).Through RNA fragment analyses and label free analysis,it was found that this system could effectively cleave virus particles,destroy viral proteins and expose their *** capsid protein of pepper mild mottle virus was effectively decomposed where serine may be the main attacking sites by^(1)O_(2).Long viral RNA fragments(3349 and 1642 nt)were cut into smaller fragments(∼160 nt)and caused their *** summary,this study contributes to controlling the spread of plant viruses in real water environment,which will potentially help protect agricultural production and food safety,and improve the health and sustainability of ecosystems.

关键词： Pepper mild mottle virus Removal Plant virus spread Biomass-based carbon nanotubes Water environments

Holographic thermodynamics of a charged AdS black hole with a global monopole

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Communications in Theoretical Physics 2025年第2期77卷 148-160页

作者： Hebin Zheng Yunxian Chen jian tang School of Physics and Astronomy China West Normal University Department of Physics and Electronic Science Aba Teachers College

By regarding the Newton constant GNand cosmological constant Λ as variables, in this paper we study the thermodynamics and phase transition of the Reissner-Nordstr o m anti-de Sitter(RN-Ad S) black hole with a global monopole within the framework of Ad S/CFT correspondence. We find interesting critical phenomena and phase behavior in the(grand)canonical ensembles of fixed( Q,V,C),( Φ,V,C) and( Q,V,μ). When the other parameters are fixed, the free energy decreases with the global monopole increases. In the( Q,V,C) ensemble,the range of the unstable region decreases with the increase of the global monopole. In the( Φ,V,C) ensemble, when Φ < Φc, the free energy appears as two branches, where the upper and lower branches correspond to low and high entropy, respectively. When( Q,V,μ) is fixed, a new zero-order phase transition occurs in the high-entropy phase and the low-entropy phase at certainμ-dependent temperatures. When μ increases to a certain value, this zero-order phase transition disappears. This certain value is negatively related to the magnitude of the global ***, we find that p-V criticality does not appear with the change of global ***, it is important to note that the CFT states of charged black holes with global monopoles do not correspond to van der Waals fluids. Finally, we find that charged black holes with global monopoles can better reflect thermodynamic phase transitions and critical phenomena under the Ad S/CFT correspondence. By adjusting the change of the global monopole, the thermodynamic phase transition will also change.

关键词： black holes AdS-CFT correspondence global monopole