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Low temperature doping of ZnO nanostruc.ures

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Sc.enc. c.ina(Tec.nologic.l Sc.enc.s) 2009年第2期52卷 318-323页

作者： M.A.THOMAS H.KANDEL y.c.soo Department of Phy.ic. and Astronomy University of Arkansas at Little Rock

Doping of ZnO nanostruc.ures was investigated by.using a low temperature elec.roc.emic.l proc.ss. Various dopant materials have been studied, inc.uding transition metals, group I, and group VII elements. The struc.ure, c.mposition, and optic.l properties of the doped ZnO nanostruc.ures were analy.ed by.sc.nning elec.ron mic.osc.py. energy.dispersive X-ray.spec.rosc.py. photoluminesc.nc., and x-ray.diffrac.ion. It was demonstrated that dopant elements were inc.rporated into the ZnO struc.ures. The effec.s of dopant inc.rporation on the struc.ure and properties of ZnO were also investigated. This low temperature approac. is c.mpatible with c.rrent mic.o-fabric.tion tec.niques and promising for large-sc.le produc.ion of doped ZnO nanostruc.ures for optic.l and elec.ronic.applic.tions.

关键词： zinc oxide nanowires doping

Direc. vapor phase growth proc.ss and robust photoluminesc.nc. properties of large area MoS2 lay.rs

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Nano Researc. 2014年第12期7卷 1759-1768页

作者： V. Senthilkumar Le c. Tam y.ng soo Kim y.min Sim Maeng-Je Seong Joon. I. Jang Department of Phy.ic. and Energy.Harvest Storage Researc. c.nter (EHSRc. University ofUIsan Ulsan 680-749 South Korea Department of Phy.ic. Applied Physics and Astronomy Binghamton University New York 13902 USA Department of Phy.ic. Chung-Ang University Seoul 156-756 South Korea

There has been growing researc. interest in the use of moly.denum disulfide in the fields of optoelec.ronic. and energy.harvesting devic.s, by.virtue of its indirec.-to-direc. band gap tunability. However, obtaining large area thin films of MoS2 for future devic. applic.tions still remains a c.allenge. In the present study. the amounts of the prec.rsors （S and MOO3） were varied sy.tematic.lly.in order to optimize the growth of highly.c.y.talline and large area MoS2 lay.rs by.the c.emic.l vapor deposition method. c.reful c.ntrol of the amounts of prec.rsors was found to the key.fac.or in the sy.thesis of large area highly.c.y.talline flakes. The thic.ness of the lay.rs was c.nfirmed by.Raman spec.rosc.py.and atomic.forc. mic.osc.py. The optic.l properties and c.emic.l c.mposition were studied by.photoluminesc.nc. （PL） and X-ray.photoelec.ron spec.rosc.py. The emergenc. of strong direc. exc.tonic.emissions at 1.82 eV （A-exc.ton, with a normalized PL intensity.of -55 × 10^3） and 1.98 eV （B-exc.ton, with a normalized PL intensity.of -5 × 10^3） of the sample at room temperature c.early.indic.tes the high luminesc.nc. quantum effic.enc.0} The mobility.of the films was found to be 0.09 c.^2/（V.s） at room temperature. This study.provides a method for the c.ntrolled sy.thesis of high-quality.two-dimensional （2D） transition metal dic.alc.genide materials, useful for applic.tions in nanodevic.s, optoelec.ronic. and solar energv c.nversion.

关键词： moly.denum disulfide c.D growth large area Raman photo-luminesc.nc. field-effec. ransistor (FET)

Effec. of Solute c.ntents of Al-Ni-Sr Alloy.on Glass Forming Ability.and Thermal Stability

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Journal of Rare Earths 2004年第Z2期22卷 73-77页

作者： Taek soo Kim J K Lee H J Kim J c.Bae Advanc.d Materials R&D c.nter Korea Institute of Industrial Technology994-32 Dongchun-dongYeonsu-kuIncheon 406-130Korea Advanced Materials R&D CenterKorea Institute of Industrial Technology994-32 Dongchun-dongYeonsu-kuIncheon 406-130Korea Advanced Materials R&D CenterKorea Institute of Industrial Technology994-32 Dongchun-dongYeonsu-kuIncheon 406-130Korea Advanced Materials R&D CenterKorea Institute of Industrial Technology994-32 Dongchun-dongYeonsu-kuIncheon 406-130Korea

Glass forming ability.(GFA) and struc.ural c.arac.erization of a new amorphous Al-Ni-Sr alloy.melt spun were investigated on the theory.of the fac.ors for the glass formation. The GFA was varied with the ratio of Ni to Sr in detail and suc.essful amorphous phase dispersed with 2 ～ 5 nm prec.pitates was prepared from Al-Ni5-Sr3. Thermal stability.and c.y.tallization behavior of the amorphous phase were determined by.c.ntinuous and isothermal heating tec.nique on Dc., resulting that the c.y.tallization oc.urs by.the growth of fc. Al nanoc.y.tals on the preexistent nuc.ei.

关键词： glass formation c.y.tallization Al base amorphous alloy. rapid solidific.tion

On Multifrac.al of c.ntor Dust

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Ac.a Mathematic. Sinic.,English Series 2009年第7期25卷 1175-1182页

作者： In-soo BAEK Department of Mathematic. Pusan University of Foreign Studies

We c.nsider quasi-self-similar measures with respec. to all real numbers on a c.ntor dust. We define a loc.l index func.ion on the real numbers for eac. quasi-self-similar measure at eac. point in a c.ntor dust, The value of the loc.l index func.ion at the real number zero for all the quasi-self-similar measures at eac. point is the weak loc.l dimension of the point. We also define transformed measures of a quasi-self-similar measure whic. are c.osely.related to the loc.l index func.ion. We c.mpute the loc.l dimensions of transformed measures of a quasi-self-similar measure to find the multifrac.al spec.rum of the quasi-self-similar measure, Furthermore we give an essential example for the theorem of loc.l dimension of transformed measure. In fac., our result is an ultimate generalization of that of a self- similar measure on a self-similar c.ntor set. Furthermore the results also explain the rec.nt results about weak loc.l dimensions on a c.ntor dust.

关键词： c.ntor set Hansdorff dimension pac.ing dimension quasi-self-similar measure loc.l dimension

Molec.lar mec.anisms and c.llular proc.ss in signal transduc.ion pathway.related to air pollutants in obstruc.ive lung diseases:A mini-review

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BIOc.LL 2023年第8期47卷 1703-1708页

作者： AN-soo JANG Division of Allergy.and Respiratory.Medic.ne Department of Internal MedicineSoonchunhyang University Bucheon Hospital170 Jomaru-roBucheon-siGyeonggi-do14584Korea

Exposure to air pollutants suc. as PM_(10),PM_(2.5),PM_(0.1),O_(3),c.,NO2,and SO_(2),and biologic.l pollutants are important fac.ors c.using the evolution and furtheranc. of obstruc.ive lung diseases(OLD),inc.uding asthma and c.ronic.obstruc.ive pulmonary.disease(c.PD).Asthma is the most frequent c.ronic.inflammatory.airway.disease,c.arac.erized by.breathlessness,wheezing,c.est tightness,and c.ugh,together with the presenc. of exaggerated expiratory.airflow fluc.uation that varies over *** is a heterogeneous lung c.ndition c.arac.erized by.c.ronic.respiratory.sy.ptoms suc. as dy.pnea,c.ugh,expec.oration,and/or exac.rbations due to abnormalities of the airway. and/or alveoli that c.use persistent,often progressive,airflow *** the molec.lar mec.anisms and c.llular proc.sses based on the development of OLD on exposure to air pollutants will provide insights into the solution of pathogenesis,prevention,and treatment of these *** molec.lar mec.anisms and c.llular proc.ss involved in signal transduc.ion pathway.play. a role in the binding of extrac.llular signaling molec.les and ligands to rec.ptors plac.d on the c.ll surfac. or on the inner side c.ll that trigger inflammation that oc.urs,espec.ally.when something important enters the c.ll to bring into a c.sc.de *** binding then alters the c.ll metabolism,shape,and gene expression in the *** review aimed to reveal the effec. of air pollutants on the molec.lar mec.anisms and c.llular proc.sses involved in the signal transduc.ion pathway. in OLD.

关键词： Air pollutants Obstruc.ive lung diseases Signal pathway

Remarkably.slow c.rrosion rate of high-purity.Mg mic.oalloy.d with 0.05wt% Sc

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Journal of Magnesium and Alloy. 2023年第3期11卷 991-997页

作者： soo-Min Baek Jeong-Ki Kim Du-Won Min Sung soo Park Department of Materials Sc.enc. and Engineering Ulsan National Institute of Science and TechnologyUlsan 44919Republic of Korea

We report that the c.rrosion resistanc. of Mg is signific.ntly.improved by.adding 0.05wt%*** rates evaluated from weight loss values after room-temperature immersion in 0.6 M Nac. solution for two weeks were 0.27 and 4.0 mm y.(-1)for the high-purity.Mg samples with and without mic.oalloy.d 0.05wt%Sc.*** benefic.al effec. of Sc.mic.oalloy.ng on the c.rrosion resistanc. of Mg is disc.ssed in c.nnec.ion with Sc.induc.d mic.ostruc.ural modific.tions.

关键词： Magnesium Mic.oalloy.ng Intermetallic.phase Mic.ogalvanic.c.rrosion

c.mputational approac.es for fast generation of digital 3D video holograms(Invited Paper)

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c.inese Optic. Letters 2009年第12期7卷 1083-1091页

作者： Seung-c.eol Kim Eun-soo Kim 3D Display.Researc. c.nter Department of Electronic Engineering Kwangwoon University

Several approac.es for fast generation of digital holograms of a three-dimensional （3D） objec. have been disc.ssed. Among them, the novel look-up table （N-LUT） method is analy.ed to dramatic.lly.reduc. the number of pre-c.lc.lated fringe patterns required for c.mputation of digital holograms of a 3D objec. by.employ.ng a new c.nc.pt of princ.pal fringe patterns, so that problems of c.mputational c.mplexity.and huge memory.size of the c.nventional ray.trac.ng and look-up table methods have been c.nsiderably.alleviated. Meanwhile, as the 3D video images have a lot of temporally.or spatially.redundant data in their inter- and intra-frames, c.mputation time of the 3D video holograms c.uld be also reduc.d just by.removing these redundant data. Thus, a c.uple of c.mputational methods for generation of 3D video holograms by.c.mbined use of the N-LUT method and data c.mpression algorithms are also presented and disc.ssed. Some experimental results finally.reveal that by.using this approac. a great reduc.ion of c.mputation time of 3D video holograms c.uld be ac.ieved.

关键词： LUT c.mputational approac.es for fast generation of digital 3D video holograms c.H

Manipulating the nonlinearity.of transition-metal dic.alc.genide polaritons

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Light(Sc.enc. & Applic.tions) 2023年第12期12卷 2540-2542页

作者： Min-soo Hwang Hong-Gy. Park Department of Phy.ic. and Astronomy and Institute of Applied PhysicsSeoul National UniversitySeoul 08826Republic of Korea

The lithographic.lly.designed potential wells in monolay.r WS2 mic.oc.vities are utilized to manipulate nonlinear transition-metal dic.alc.genide polaritons and enhanc. the polariton-reservoir interac.ion strength.

关键词： strength. polar transition

Rec.nt advanc.s in 3D printed elec.rode materials for elec.roc.emic.l energy.storage devic.s

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Journal of Energy.c.emistry 2023年第6期81卷 272-312,I0008页

作者： Suhail Mubarak Duraisami Dhamodharan Hun-soo By.n Department of c.emic.l and Biomolec.lar Engineering Chonnam National UniversityYeosuJeonnam 59626Republic of Korea Greenlab Department of prosthodonticsSaveetha Dental College and HospitalsSaveetha Institute of Medical and Technical SciencesChennaiTamil Nadu 600077India

Elec.roc.emic.l energy.storage(EES)sy.tems like batteries and superc.pac.tors are bec.ming the key.power sourc.s for attempts to c.ange the energy.dependenc.0}from inadequate fossil fuels to sustainable and renewable *** energy.storage devic.s(EESDs)operate effic.ently.as a result of the c.nstruc.ion and assemblage of elec.rodes and elec.roly.es with appropriate struc.ures and effec.ive *** manufac.uring proc.dures have restric.ions on regulating the morphology.and arc.itec.ure of the elec.rodes,whic. would influenc. the performanc. of the devic.s.3D printing(3DP)is an advanc.d manufac.uring tec.nology.c.mbining c.mputer-aided design and has been rec.gnised as an artistic.method of fabric.ting different fragments of energy.storage devic.s with its ability.to prec.sely.c.ntrol the geometry.porosity.and morphology.with improved spec.fic.energy.and power *** c.pac.ty.to c.eate mathematic.lly.c.allenging shape or c.nfiguration designs and high-aspec.-ratio 3D arc.itec.ures makes 3D printing tec.nology.unique in its ***,the c.ntrol settings,interac.ive manufac.uring proc.sses,and protrac.ed post-treatments will affec. the reproduc.bility.of the printed *** intelligent software,sophistic.ted c.ntrol sy.tems,high-grade industrial equipment,and post-treatment-free methods are nec.ssary.to develop.3D printed(3DPd)EESDs nec.ssitate dy.amic.printable materials and c.mposites that are influenc.d by.performanc. c.iteria and fundamental ***,we review the rec.nt advanc.s in 3DPd elec.rodes for EES *** emphasis is on printable material sy.thesis,3DP tec.niques,and the elec.roc.emic.l performanc. of printed *** the fabric.tion of elec.rodes,we c.nc.ntrate on major 3DP tec.nologies suc. as direc. ink writing(DIW),inkjet printing(IJP),fused deposition modelling(FDM),and stereolithography.DP(SLA).The benefits and drawbac.s of eac. 3DP tec.nology.are extensively.di

关键词： 3D printing 3D printed elec.rodes Elec.roc.emic.l energy.storage Lithium-ion battery Zinc.ion battery Superc.pac.tor