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Direct Imaging of Molecular Orbitals of Metal Ph.h.locyanines on Metal Surfaces with.an O2-Functionalized Tip of a Scanning Tunneling Microscope

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Nano Research 2011年第6期4卷 523-530页

作者： Zh.h.i Ch.ng Sh.xuan Du Wei Guo Li gao Zh.tao Deng Nan Jiang h.iming Guo h.o Tang h. J. gao Institute of Ph.sics Chinese Academy of Sciences RO. Box 603 Beijing 100190 China Center for Material Elaboration and Structural Studies B.P. 94347 31055 Toulouse Cedex France

h.gh.resolution scanning tunneling microscope images of iron ph.h.locyanine and zinc ph.h.locyanine molecules on Au（111） h.ve been obtained using a functionalized tip of a scanning tunneling microscope （STM）, and sh.w rich.intramolecular features th.t are not observed using clean tips. Ab initio density functional th.ory calculations and extended h.ckel th.ory calculations revealed th.t th. imaging of detailed electronic states is due specifically to th. decoration of th. STM tip with.O2. Th. detailed structures are differentiated only wh.n interacting with.th. h.gh.y directional orbitals of th. oxygen molecules adsorbed on a truncated, [111]-oriented tungsten tip. Our results indicate a meth.d for increasing th. resolution in generic scans and th.s, h.ve potential applications in fundamental research.based on h.gh.resolution electronic states of molecules on metals, concerning, for example, ch.mical reactions, and catalysis mech.nisms.

关键词： h.gh.resolution scanning tunneling microscope (STM) imaging functionalized STM tip metal ph.h.locyanines molecular orbital density functional th.ory calculation

A Meth.d of Inversing th. Peak Density of Atomic Oxygen Vertical Distribution in th. MLT Region From th. OI (557.7 nm)Nigh. Airglow Intensity

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空间科学学报 2005年第5期25卷 484-489页

作者： h. gao J. Y. Xu W. Yuan Laboratory for Space Weath.r Center for Space Science and Applied Research Chinese Academy of Sciences Beijing 100080 China Ch.na-Russia Joint Research.Center on Space Weath.r Graduate Sch.ol Chinese Academy of Sciences Beijing 100039

In th.s paper, using th. MSISE-90 model as th. reference atmosph.re, we discuss th. feasibility and meth.d of deducing th. peak densities of th. undisturbed atomic oxygen profiles in th. MLT region (th. mesosph.re and lower th.rmosph.re region) from OI (557.7 nm) nigh. airglow intersities. Th. peak densities for different seasons, latitudes and longitudes are deduced from OI (557.7nm) airglow intensities th.ough.th.s expression. We analyze th. features of inversion relative errors and discuss th. influence of th. variations in temperature on inversion errors. Th. results indicate th.t all inversion errors are less th.n 5% except for th.se at h.gh.altitudes in th. summer h.misph.re. And th. impact of th. variations in temperature on errors is not significant.

关键词：原子氧 MLT 气辉天文

Th. Nonlinear Model of th. Response of Airglow to Gravity Waves

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空间科学学报 2005年第5期25卷 490-494,F0003页

作者： J. Y. Xu h. gao A. V. Mikh.lev Laboratory for Space Weath.r Center for Space Science and Applied Research Chinee Academy of Sciences Beijing 100080 China Institute of Solar-Terrestrial Ph.sics Siberian Branch Russian Academy of Sciences Irkutsk 664033 Russia Ch.na-Russia Joint Research.Center on Space Weath.r

In th.s paper, we develope a timodependent, nonlinear, ph.toch.mical-dynamical 2-D model wh.ch.is composed of 3 models: dynamical gravity wave model, middle atmosph.ric ph.toch.mical model, and airglow layer ph.toch.mical model. We use th. model to study th. effect of th. gravity wave propagation on th. airglow layer. Th. comparison between th. effects of th. different wavelength.gravity wave on th. airglow emission distributions is made. Wh.n th. vertical wavelength.of th. gravity wave is close to or is sh.rter th.n th. th.ckness of th. airglow layer, th. gravity wave can make complex structure of th. airglow layer, such.as th. double and multi-peak structures of th. airglow layer. h.wever, th. gravity wave th.t h.s long vertical wavelength.can make large scale perturbation of th. airglow emission distribution.

关键词：重力波气辉天文非线性模型

Self-assembly of Metal Ph.h.locyanines on Different Metal Substrates

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Self-assembly of Metal Phthalocyanines on Different Metal Su...

第18届国际真空大会

作者： Y. h. Jiang J. C. Lian L. W. Liu Z. h. Ch.ng L. gao W. D. Xiao S. X. Du and h.-J. gao* Institute of Ph.sics Ch.nese Academy of Sciences Beijing 100190 Ch.na

＜正＞Th. self-assembly of organic molecules at solid surfaces h.s made tremendous progresses in th. development of organic nanometer-sized devices. Among th.se organic molecular building blocks,

关键词： Self-assembly Metal ph.h.locyanines Scanning tunneling microscopy and spectroscopy Kondo resonance.

X-ray Ph.toelectron Spectroscopy Ch.racterization of Silicone Rubber Surface Modified by CF4 Radio Frequency Plasma

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X-ray Photoelectron Spectroscopy Characterization of Silicon...

第18届国际真空大会

作者： S. h. gao a * L. h. gao a K. S. Zh.u b a Department of Ph.sics Mech.nical and Electrical Engineering Sanming University Sanming 365004 Ch.na b Sch.ol of Ph.sics Science and Tech.ology Central South.University Ch.ngsh. 410083 Ch.na

Silicone rubber （SIR） samples, wh.ch.are employed in outdoor insulators, were treated by CF4 radio frequency （RF） capacitively coupled plasma. Th. h.droph.bic and oleoph.bic properties were ch.racterized in static contact angle meth.d. X-ray ph.toelectron spectroscopy （XPS） was used to test th. variation of th. functional groups on th. modified SIR surface. Th. results indicate th.t th. h.O and Ch.I2 static contact angles of SIR surface are improved from 100.7° and 61.6° to 150.2° and 123.6°, respectively. According to th. XPS analysis, it is suggested th.t th. formation of super-h.droph.bic surface ascribes to th. formation of [-SiFx（Ch.）2-x-O-]n （x = 1, 2） structure produced by th. direct attach.ent of F atoms to Si, especially, th. formation of [-SiF2-O-]n structure is one of main factors of super-h.droph.bic surface.

关键词： Silicone Rubber XPS h.droph.bic and Oleoph.bic Properties

Molecular“Coupled Butterfly”on Ag(110):Experiment and First-principles Calculations

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Molecular“Coupled Butterfly”on Ag(110):Experiment and Firs...

2005年纳米和表面科学与技术全国会议

作者： W.Guo S.X.Du h.-J.gao Nanoscale Ph.sics & Devices Laboratory,Institute of Ph.sics,CAS,Beijing 100080

Th. adsorption beh.vior of organic π-conjugated molecules on single crystals is ofgreat interest because th.ir ph.sical and ch.mical properties are keys for molecularscale self-assembly,wh.ch.is important to improve properties of electronic andoptoelectronic devices such.as ligh.-emitting diodes,field-effect transistors and th.nfilm *** studying th. adsorption beh.vior of th.se molecules th.understanding of adsorption processes can be *** our work,one aromatic

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New Gene Th.rapy Strategies for th. Deletion of Exon 44 of Dystroph.n Gene Based on Gene Editing by TALENs

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Open Journal of Medicinal Ch.mistry 2013年第1期3卷 1-6页

作者： Ping Li Yunzh. Pan Alice S. S. Li Aijuan Sun Jia Zh.ng h. L. gao Pierre Sirois Kai Li Centre h.spitalier de l’Université Laval Research.Center Laval University Quebec Canada Department of Molecular Diagnostics and Bioph.rmaceutics College of Pharmaceutical Science Soochow University Suzhou China DNA Sequencing Core Laboratory City of Hope National Medical Center Duarte USA Gene Core The Genomics Institute of the Novartis Research Foundation San Diego USA University of Waterloo Waterloo Canada

Duch.nne Muscular Dystroph. (DMD) is a severe ch.ldh.od form of muscular dystroph.. Both.th. severe form and its milder form of Becker Muscular Dystroph. (BMD) are caused by th. mutation of dystroph.n gene. Different from some oth.r genetic diseases such.as h.moph.lia th.t can be treated by replacement th.rapy, th.re is no effective th.rapy for muscular dystroph. in conventional medication. Gene editing tech.ology from th. recently developed engineered nucleases such.as TALENs h.s been successfully employed in genome modification of a variety of species, and will be applied in gene th.rapy of selected h.man diseases. Th. genetic basis of DMD and BMD indicates th.t DMD is a good target for gene th.rapy th.ough.returning th. reading frame of dystroph.n gene. Gene th.rapy strategies described h.re may apply to many oth.r genetic diseases. Wider application of TALENs in gene th.rapy h.ve th. potential to dramatically prolong th. lifespan of individuals with.genetic diseases.

关键词： TALENs DMD Gene Th.rapy Exon Skipping

Th. INFLUENCE OF CAVITY DAMAGE ON MECh.NICAL PROPERTIES OF SUPERPLASTICALLY-DEFORMED MATERIALS AND ITS PREDICTION

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Acta Metallurgica Sinica(English.Letters) 2000年第2期13卷 481-485页

作者： M. B. Liu, Z. C. Zh.o,h. gao,M. Q. Li and S. C. Wu College of Materials Science and Engineering, North.estern Polytech.ical University, Xi’an 710072, Ch.na

Aluminium alloy LY12CZ sh.et with.ut any pre-treatment h.s been used to study th. influence of cavity damage on th. mech.nical properties of th. superplastically-deformed materials room temper- ature. Th. experimental results sh.w th.t: (1) th. lower th. rate of cavitation as th. superplastic strain increases, th. h.gh.r th. superplasticity is; (2) th. mech.nical properties of superplastically- deformed materials at room temperature decrease as th. superplastically-deformed strain increases, especially, a noteworth. decrease in elasticity modulus, yield strenth.and ultimate strength.at room temperature begins to appear as th. level of cavitation by area comes up to about 4%, wh.le at th. same level th. reduction in area drops down a very large quantity. Th.n, a th.ee-layer back- propagation neural network h.s been developed to predict th. mach.nich. properties of th. superplasti- cally-deformed *** results acquired from th. neural network are very inspiring

关键词： superplasticity cavity,mech.nical property artificial neural network

Prediction of Dirac state in monolayer TiB2

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Prediction of Dirac state in monolayer TiB2

中国真空学会2014学术年会

作者： L.Z.Zh.ng S.R.Song Z.F.Wang S.X.Du h.-J.gao F.Liu Institute of Ph.sics Chinese Academy of Sciences Department of Materials Science and Engineering University of Utah Collaborative Innovation Center of Quantum Matter

We predict th. existence of Dirac state in monolayer TiB2 sh.et(m-TiB2),a two-dimensionalmetal diboride,based on first-principles *** structure of m-TiB2 is found to bech.racterized with.anisotropic Dirac cones with.th. largest Fermi velocity of 0.57×10m/s,wh.ch.s about one-h.lf of th.t of *** Dirac point is located at th. Fermi level between K andΓpoint,with.Dirac states arising primarily from d orbitals of *** m-TiB2 exh.bitsa bending instability,so th.t a planar m-TiB2 needs to be stabilized on a *** m-TiB2 on h.BN substrate reveals a negligible influence of th. h.BN substrate to th. electronicproperties of *** findings extend th. Dirac materials to metal diborides.

关键词： Dirac state two-dimensional material TiB2 first-principles calculations