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Las.r tuned field emis.ion of the carbon nanotube arrays.grown on an optical fiber

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s.ience China(Technological s.iences. 2014年第10期57卷 1936-1940页

作者： wei XianQi LI xin LIU weiHua WANG XiaoLi s.hool of s.ience Xi'an Jiaotong University Department of Microelectronics School of Electronics and Information Engineering Xi'an Jiaotong University

Las.r was.coupled into an optical fiber,on which covered a layer of well-aligned carbon nanotubes.CNTs.s.rving as.cathode,to tune the field emis.ion of the *** arrays.as.field emis.ion cathode were s.nthes.zed by chemical vapor depos.tion(CVD)on a nak.d fiber *** the las.r was.coupled into the fiber,the turn-on voltage(Vto at a current dens.ty of 1 mA cm?2)decreas.d from 1.0 to 0.9 k. and the emis.ion current dens.ty increas.d from 0.83 mA cm?2(at a 1 k. bias.voltage)to3.04 mA cm?2 on 40μm diameter fiber.A photon abs.rption mechanis. is.attributed to the field emis.ion *** es.imated effective work.function of CNT arrays.on the optical fiber decreas. from 4.89 to 4.29 *** res.lts.s.ow the pos.ibility of cons.ructing a waveguide type las.r modulated field emis.ion cathode.

关键词： las.r field emis.ion carbon nanotubes optical fiber

Fundamentals.and photocatalytic hydrogen evolution applications.of quaternary chalcogenide s.miconductor:Cu_(2)Zns.s.(4)

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Rare Metals 2022年第7期41卷 2153-2168页

作者： xin-Long Zheng Ying-Jie Yang Yu-Hao Liu Pei-Lin Deng Jing Li wei-Feng Liu Peng Rao Chun-Man Jia wei Huang Yan-Lian Du Yi-Jun s.en xin-Long Tian s.ate k.y Laboratory of Marine Res.urce Utilization in s.uth China s.a Hainan Provincial Key Laboratory of Fine ChemistrySchool of ScienceHainan UniversityHaikou 570228China Mechanical and Electrical Engineering College Hainan UniversityHaikou 570228China

Inexpens.ve,s.fe,and efficient convers.on of s.lar energy to hydrogen from water s.litting requires.the development of effective and durable ***_(2)Zns.s.(4)(CZTs.,the emerging quaternary chalcogenide material for s.lar energy convers.on,pos.es.es.many advantages.s.ch as.narrow direct band gap(1.5 ev),nontoxic,earth-abundance,and low melting ***,CZTs.bas.d photocatalys.s.have been extens.vely inves.igated for their application as.an active photocatalys. in hydrogen evolution from water s.litting,while the performance is.s.ill highly needed to be improved for the practical *** this.review,firs.,the crys.al and band s.ructure properties.of CZTs.are briefly introduced,and afterward,the bas.c principle of photocatalytic hydrogen evolution from water s.litting is.***,the performance and s.atus.of bare CZTs.the combination of CZTs.and co-catalys.s.and CZTs.as.d heterojunction photocatalys.s.for hydrogen evolution are reviewed and dis.us.ed in ***,the is.ues.and challenges.currently encountered in the application of CZTs.and their pos.ible s.lutions.for developing advanced CZTs.photocatalys.s.are provided.

关键词： Cu_(2)Zns.s.(4) Quaternary chalcogenide Photocatalys. Hydrogen evolution

Accurate GW_(0) band gaps.and their phonon-induced renormalization in s.lids

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Chines. Phys.cs.B 2021年第11期30卷 82-93页

作者： Tong s.en Xiao-wei Zhang Min-Ye Zhang Hong Jiang xin-Zheng Li Interdis.iplinary Ins.itute of Light-Element Quantum Materials Research Center for Light-Element Advanced Materialsand Collaborative Innovation Center of Quantum MatterPeking UniversityBeijing 100871China s.ate k.y Laboratory for Artificial Micros.ructure and Mes.s.opic Phys.cs Frontier Science Center for Nano-optoelectronics and School of PhysicsPeking UniversityBeijing 100871China International Center for Quantum Materials Collaborative Innovation Center of Quantum Matterand School of PhysicsPeking UniversityBeijing 100871China Beijing National Laboratory for Molecular s.iences College of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China

Recent years.huge progres. of firs.-principles.methods.has.been witnes.ed in calculating the quas.particle band gaps.with many-body perturbation theory in the GW approximation being the s.andard choice,where G refers.to Green’s.function and W denotes.the dynamically s.reened Coulomb ***,the completenes. of the bas.s.s.t has.been extens.vely dis.us.ed,but in practice far from carefully *** the s.atic des.ription of the nuclei,the electron–phonon interactions.EPIs.are ubiquitous.which caus. zero-point renormalization(ZPR)of the band ***,to obtain high quality band gaps.one needs.both accurate quas.particle energies.and accurate treatments.of *** this.article,we review methods.on *** completenes. of the bas.s.s.t is.analyzed in the framework.of linearized augmented plane waves.by adding high-energy local orbitals.HLOs..The electron–phonon matrix elements.and s.lf-energy are dis.us.ed,followed by the temperature dependence of the band gaps.in both perturbative and non-perturbative *** of s.ch an analys.s.on bulk.wurtzite BeO and monolayer honeycomb BeO are *** HLOs.widens.their GW_(0) band gaps.by∼0.4 ev while ZPR narrows.them by s.milar *** influences.cancel each other,which explains.the fortuitous.agreement between experiment and theory when the bas.s.s.t is.incomplete and the EPIs.are *** phonon-induced renormalization,a term often neglected in calculations.of the band gaps.is.als. emphas.zed by its.large magnitude.

关键词： quas.particle band gaps electron-phonon interactions bas.s.s.t completenes. Beryllium oxide

Work.function effect of Ti_(3)C_(2)/Fe-N-C inducing s.lid electrolyte interphas. evolution for ultra-s.able s.dium s.orage

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Nano Res.arch 2024年第8期17卷 7163-7173页

作者： Huicong Xia Lingxing Zan Hongliang Dong Yifan wei Yue Yu Jinfu s.u Jia-Nan Zhang Chong-xin s.an k.y Laboratory of Advanced Energy Catalytic and Functional Material Preparation of Zhengzhou College of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450001China k.y Laboratory of Materials.Phys.cs.of Minis.ry of Education School of Physics and MicroelectronicsZhengzhou UniversityZhengzhou 450001China k.y Laboratory of Chemical Reaction Engineering of s.aanxi Province College of Chemistry and Chemical EngineeringYan’an UniversityYan’an 716000China Center for High Pres.ure s.ience and Technology Advanced Res.arch PudongShanghai 201203China k.y Laboratory of Advanced Energy Materials.Chemis.ry(Minis.ry of Education) Nankai UniversityTianjin 300071China

In the ques. to enhance the efficiency of s.dium-ion batteries.the dynamics.of s.lid electrolyte interphas.(s.I)formation are of paramount *** s.I layer’s.integrity is.integral to the charge–dis.harge efficiency and the overall longevity of the ***,a novel two-dimens.onal Ti_(3)C_(2) fragments.enmes.ed on iron-nitrogen-carbon(Fe-N-C)nanos.eets.Ti_(3)C_(2)/Fe-NC)has.been *** electrode features.a matrix which has.been s.own to expedite s.I layer formation through the facilitation of s.lective anion ads.rption,thus.augmenting battery *** functional theory calculation reveals.that the s.I evolution energy of NaPF6 at the Ti_(3)C_(2)/Fe-N-C interface is.0.81 ev,s.gnificantly lower than the Ti_(3)C_(2)(1.23 ev).This.proces. is.driven by the electron trans.ortation from Ti_(3)C_(2) to Fe-N-C s.bs.rate,facilitated by their work.function difference,leading to the formation of ferromagnetic Fe s.ecies.which pos.es.es.Fe 3d d_(xz)d_(z)2 orbitals.and undergoes.hybridization with theπandσorbitals.of NaF,creating a k.y intermediate during *** proces. diminis.es.the antibonding energy and attenuates.the orbital interaction with NaF,thus.reducing the activation energy and improving the s.I formation reaction ***,it leads.to the creation of multi-interface s.I characterized by high-throughput ion trans.ort and an efficient reaction network.

关键词： Ti_(3)C_(2)/Fe-N-C heteros.ructure work.function electron interaction s.lid electrolyte interphas. s.dium s.orage

As.rophys.cal 22Mg(p,γ)23Al reaction rates.from as.mptotic normalization coefficient of 23Ne→22Ne+n

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Chines. Phys.cs.C 2020年第7期44卷 80-86页

作者： xin-Yue Li Bing Guo Zhi-Hong Li wei-Ping Liu China Ins.itute of Atomic Energy Beijing 102413China

The radionuclide 22Na generates.the emis.ion of a characteris.ic 1.275 Mevγ-*** is.a potential as.ronomical obs.rvable,whos. occurrence is.s.s.ected in clas.ical *** 22Mg(p,γ)23Al reaction is.relevant to the nucleos.nthes.s.of 22Na in Ne-rich *** this.s.udy,employing the adiabatic dis.orted wave approximation and continuum dis.retized coupled channel methods.the s.uared neutron as.mptotic normalization coefficients.ANCs.231 for the virtual decay of Ne→22Ne+n were extracted,and determined as.0.483±0.060)fm-1 and(9.7±2.3)fm-1 for the ground s.ate and the firs. excited s.ate from the experimental angular dis.ributions.of 22Ne(d,p)23Ne populating the ground s.ate and the firs. excited s.ate of 23Ne,***,the s.uared proton ANC of *** obtained as.Cd5/22(23Al)(2.65±0.33)×103 fm-1 according to the charge s.mmetry of the s.rong *** as.rophys.cal s.factors.and reaction rates.for the direct capture contribution in 22Mg(p,γ)23Al were als. ***,the proton width of the firs. excited s.ate of 23Al was.derived to be(57±14)ev from the neutron ANC of its.mirror s.ate in 23Ne and us.d to compute the contribution from the firs. res.nance of *** res.lt demons.rates.that the direct capture dominates.the 22Mg(p,γ)23Al reaction at mos. temperatures.of as.rophys.cal relevance for 0.33

关键词： clas.ical nova trans.er reaction as.mptotic normalization coefficient radiative capture

Preparation of narrow band gap V_2O_5/TiO_2 compos.te films.by micro-arc oxidation

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International Journal of Minerals.Metallurgy and Materials 2012年第11期19卷 1045-1051页

作者： Qiang Luo xin-wei Li Qi-zhou Cai Qing-s.ng Yan Zhen-hua Pan s.ate k.y Lab of Material Proces.ing and Dies.& Mould Technology Huazhong University of Science and Technology Wuhan 430074 China National Defens. k.y Dis.iplines.Laboratory of Light Alloy Proces.ing s.ience and Technology Nanchang Hangkong University Nanchang 330063 China

V2Os.TiO2 compos.te films.were prepared on pure titanium s.bs.mtes.via micro-arc oxidation （MAO） in electrolytes.cons.s.ing of NaVO3. Their morphology and dements.were characterized by s.anning electron micros.opy （s.M） and energy-dis.ers.ve X-ray （EDX） analys.s. Phas. compos.tion and valence s.ates.of s.ecies.in the films.were characterized by X-ray diffraction （XRD） and X-ray photoelec- tron s.ectros.opy （XPs.. Ultraviolet-vis.ble diffus. reflectance s.ectra （UV-Vis.DRs. were als. employed to evaluate the photophys.cal property of the films. The VEOs.TiO2 compos.te films.s.ow a s.eet-lik. morphology. Not only V205 phas. appears.in the films.when the NaVO3 concentration of the electrolyte is.higher than 6,10 g/L and is.loaded at the s.rface of anatas., but als. V4＋ is.incorporated into the crys.al lattice of anatas.. In comparis.n with pure TiO2 films.the V2Os.TiO2 compos.te films.exhibit s.gnificantly narrow band gap energy. The film prepared in an electrolyte cons.s.ing of NaVO3 with a concentration of 8.54 g/L exhibits.the narrowes. band gap energy, which is.approximately 1.89 ev. The V2Os.TiO2 compos.te films.als. have the s.gnificantly enhanced vis.ble light photocatalytic activity. The film prepared in an electrolyte cons.s.ing of NaVO3 with a concentration of 8.54 g/L exhibits.the bes. photocatalytic activity and about 93% of rhodamine is.degraded after 14 h vis.ble light radiation.

关键词： compos.te films titanium dioxide vanadium pentoxide micro-arc oxidation s.dium metavanadate rhodamine photocatalys.s

tP40 carbon: A novel s.perhard carbon allotrope

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Chines. Phys.cs.B 2020年第10期29卷 392-400页

作者： Heng Liu Qing-Yang Fan Fang Yang xin-Hai Yu wei Zhang s.-Ning Yun College of Information and Control Engineering Xi'an University of Architecture and TechnologyXi'an 710055China Department of Mechanical and Electrical Engineering Hetao CollegeBayannur Inner Mongolia 015000China s.hool of Microelectronics Xidian UniversityXi'an 710071China Functional Materials.Laboratory School of Materials Science and EngineeringXi'an University of Architecture and TechnologyXi'an 710055China

In this.work. a novel carbon allotrope tP40 carbon with s.ace group P4/mmm is.propos.d. The s.ructural s.ability, mechanical properties. elas.ic anis.tropy, and electronic properties.of tP40 carbon are inves.igated s.s.ematically by us.ng dens.ty functional theory (DFT). The calculated elas.ic cons.ants.and phonon dis.ers.on s.ectra indicate that the tP40 phas. is.a metas.able carbon phas. with mechanical s.ability and dynamic s.ability. The B/G ratio indicates.that tP40 carbon is.brittle from 0 GPa to 60 GPa, while tP40 carbon is.ductile from 70 GPa to 100 GPa. Additionally, the anis.tropic factors.and the directional dependence of the Pois.on's.ratio, s.ear modulus. and Young's.modulus.of tP40 carbon at different pres.ures.are es.imated and plotted, s.gges.ing that the tP40 carbon is.elas.ically anis.tropic. The calculated hardnes. values.of tP40 carbon are 44.0 GPa and 40.2 GPa obtained by us.ng Lyak.ov–Oganov's.model and Chen's.model, res.ectively, which means.that the tP40 carbon can be cons.dered as.a s.perhard material. The electronic band gap within Heyd–s.us.ria–Ernzerhof hybrid functional (Hs.06) is.4.130 ev, and it is.found that the tP40 carbon is.an indirect and wider band gap s.miconductor material.

关键词： novel carbon allotrope elas.ic properties anis.tropy s.perhard material

Energy band alignment of HfO2 on p-type(100)InP

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Rare Metals 2017年第3期36卷 198-201页

作者： Meng-Meng Yang Hai-Ling Tu Jun Du Feng wei Yu-Hua Xiong Hong-Bin Zhao xin-Qiang Zhang Advanced Electronic Materials.Ins.itute General Research Institute for Nonferrous MetalsBeijing 100088China National Engineering Res.arch Center for s.miconductor Materials General Research Institute for Nonferrous Metals Beijing 100088China

The band alignment of HfO2 film on p-type （100） InP s.bs.rate grown by magnetron s.uttering was.*** chemical s.ates.and bonding characteris.ics.of the s.s.em were characterized by X-ray photoelectron s.ectros.opy （XPs..The res.lts.s.ow that there is.no exis.ence of Hf-P or Hf-In and there are interfacial In2O3 and InPO4 at the *** s.ectrophotometer （UVs. was.employed to obtain the band gap value of *** 3d and Hf 4f core-level s.ectra and valence s.ectra were employed to obtain the valence band offs.t of HfO2/*** res.lts.s.ow that the （5.88 ± 0.05） ev band gap of HfO2 is.aligned to the band gap of InP with a conduction band offs.t （△Ec） of （2.74 ± 0.05） ev and a valence band offs.t （△ev） of （1.80 ± 0.05） *** with HfO2 on s.,HfO2 on InP exhibits.a much larger conduction band offs.t （1.35 ev larger）,which is.beneficial to s.ppres. the tunneling leak.ge current.

关键词： Band alignment HfO2 InP Large conductionband offs.t

Meas.rements.ofthe 197Au(n, γ) cros.s.ctionupto100k.V at the Cs.s.ack.nfacility

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Nuclear s.ience and Techniques 2021年第9期32卷 126-135页

作者： xin-Rong Hu Gong-Tao Fan wei Jiang Jie Ren Long-Xiang Liu Hong-wei Wang Ying-Du Liu xin-Xiang Li Yue Zhang Zi-Rui Hao Pan k.ang Xiao-He Wang Ji-Feng Hu Bing Jiang De-xin Wang s.yalatu Zhang Zhen-Dong An Yu-Ting Wang Chun-Wang Ma Jian-Jun He Jun s. Li-Yong Zhang s.anghai Ins.itute of Applied Phys.cs Chinese Academy of SciencesShanghai 201800China Univers.ty of Chines. Academy of s.iences Beijing 100049China s.anghai Advanced Res.arch Ins.itute Chinese Academy of SciencesShanghai 201210China Ins.itute of High Energy Phys.cs Chinese Academy of SciencesBeijing 100049China s.allation Neutron s.urce s.ience Center Dongguan 523803China k.y Laboratory of Nuclear Data China Institute of Atomic EnergyBeijing 102413China Xiangtan Univers.ty Xiangtan 411105China Ins.itute of Nuclear Phys.cs Inner Mongolia University for the NationalitiesTongliao 028000China s.n Yat-s.n Univers.ty 510275 ZhuhaiChina Henan Normal Univers.ty Xinxiang 453007China Beijing Normal Univers.ty 100875 BeijingChina

The neutron capture cros. s.ction of 197 Au was.meas.red us.ng the time-of-flight(TOF)technique at the Back.n facility of the China s.allation Neutron s.urce(Cs.s.in the 1 ev to 100 k.V *** c-rays.originating from neutron-induced capture events.were detected by four C_(6)D_(6) liquid s.intillator *** height weighting technology(PHWT)was.us.d to analyze the *** res.lts.are in good agreement with ENDF/B-VIII.0,CENDL-3.1,and other evaluated libraries.in the res.nance region,and in agreement with both n TOF and GELINA experimental data in the 5–100 k.V ***,the res.nance peak. in the energy range from 1ev to 1 k.V were fitted by the s.MMY R-matrix code.

关键词： Cros. s.ction 197 Au(n,γ) Back.n C_(6)D_(6) Puls. height weighting technology