메뉴 건너뛰기




Volumn 9, Issue 5, 2012, Pages 621-628

Preparation and enhanced ferromagnetic, semi-conductive, and optical properties of Co-doped ZnO rod arrays

Author keywords

Co doping; Ferromagnetism; Photoluminescence; Semiconductor; ZnO rod arrays

Indexed keywords

COBALT COMPOUNDS; CRYSTAL STRUCTURE; CURRENT VOLTAGE CHARACTERISTICS; FERROMAGNETISM; II-VI SEMICONDUCTORS; MAGNETIC SEMICONDUCTORS; OPTICAL PROPERTIES; OXIDE SEMICONDUCTORS; PHOTOLUMINESCENCE; PRECIPITATION (CHEMICAL); SEMICONDUCTOR DOPING; SEMICONDUCTOR MATERIALS; WIDE BAND GAP SEMICONDUCTORS; ZINC OXIDE; ZINC SULFIDE;

EID: 84865676967     PISSN: 15470091     EISSN: None     Source Type: Journal    
DOI: 10.1007/s11998-011-9384-4     Document Type: Article
Times cited : (5)

References (38)
  • 1
    • 0141633003 scopus 로고    scopus 로고
    • Molecular Rectifying Diodes from Self-Assembly on Silicon
    • 10.1021/nl034162f 1:CAS:528:DC%2BD3sXjsVOjtb8%3D
    • S Lenfant C Krzeminski C Delerue G Allan D Vuillaume 2003 Molecular Rectifying Diodes from Self-Assembly on Silicon Nano Lett. 3 741 746 10.1021/nl034162f 1:CAS:528:DC%2BD3sXjsVOjtb8%3D
    • (2003) Nano Lett. , vol.3 , pp. 741-746
    • Lenfant, S.1    Krzeminski, C.2    Delerue, C.3    Allan, G.4    Vuillaume, D.5
  • 2
    • 33644940297 scopus 로고    scopus 로고
    • Preparation, Rectifying Diodes from Asymmetrically Functionalized Single-Wall Carbon Nanotubes
    • 10.1021/ja053950z 1:CAS:528:DC%2BD28Xhs1Citbo%3D
    • Z Wei M Kondratenko LH Dao DF Perepichka 2006 Preparation, Rectifying Diodes from Asymmetrically Functionalized Single-Wall Carbon Nanotubes J. Am. Chem. Soc. 128 3134 3135 10.1021/ja053950z 1:CAS:528:DC%2BD28Xhs1Citbo%3D
    • (2006) J. Am. Chem. Soc. , vol.128 , pp. 3134-3135
    • Wei, Z.1    Kondratenko, M.2    Dao, L.H.3    Perepichka, D.F.4
  • 3
    • 0037428690 scopus 로고    scopus 로고
    • Excitonic Emissions Observed in ZnO Single Crystal Nanorods
    • 10.1063/1.1544437 1:CAS:528:DC%2BD3sXhtVGqt74%3D
    • WI Park YH Jun SW Jung GC Yi 2003 Excitonic Emissions Observed in ZnO Single Crystal Nanorods Appl. Phys. Lett. 82 964 966 10.1063/1.1544437 1:CAS:528:DC%2BD3sXhtVGqt74%3D
    • (2003) Appl. Phys. Lett. , vol.82 , pp. 964-966
    • Park, W.I.1    Jun, Y.H.2    Jung, S.W.3    Yi, G.C.4
  • 4
    • 0037448573 scopus 로고    scopus 로고
    • Single-Nanowire Electrically Driven Lasers
    • 10.1038/nature01353 1:CAS:528:DC%2BD3sXjsF2gug%3D%3D
    • X Duan Y Huang R Agarwal CW Lieber 2003 Single-Nanowire Electrically Driven Lasers Nature 421 241 245 10.1038/nature01353 1:CAS:528: DC%2BD3sXjsF2gug%3D%3D
    • (2003) Nature , vol.421 , pp. 241-245
    • Duan, X.1    Huang, Y.2    Agarwal, R.3    Lieber, C.W.4
  • 5
    • 44449091674 scopus 로고    scopus 로고
    • Highly Oriented 1-D ZnO Nanorod Arrays on Zinc Foil: Direct Growth from Substrate, Optical Properties and Photocatalytic Activities
    • 10.1021/jp7113175 1:CAS:528:DC%2BD1cXkvVKgsbc%3D
    • YX Wang XY Li G Lu X Quan GH Chen 2008 Highly Oriented 1-D ZnO Nanorod Arrays on Zinc Foil: Direct Growth from Substrate, Optical Properties and Photocatalytic Activities J. Phys. Chem. C 112 7332 7336 10.1021/jp7113175 1:CAS:528:DC%2BD1cXkvVKgsbc%3D
    • (2008) J. Phys. Chem. C , vol.112 , pp. 7332-7336
    • Wang, Y.X.1    Li, X.Y.2    Lu, G.3    Quan, X.4    Chen, G.H.5
  • 6
    • 53549084343 scopus 로고    scopus 로고
    • Tunable Photocurrent Spectrum in Well-Oriented Zinc Oxide Nanorod Arrays with Enhanced Photocatalytic Activity
    • 10.1021/jp800379k 1:CAS:528:DC%2BD1cXmtFWgs70%3D
    • G Wang D Chen H Zhang JZ Zhang J Li 2008 Tunable Photocurrent Spectrum in Well-Oriented Zinc Oxide Nanorod Arrays with Enhanced Photocatalytic Activity J. Phys. Chem. C 112 8850 8855 10.1021/jp800379k 1:CAS:528:DC%2BD1cXmtFWgs70%3D
    • (2008) J. Phys. Chem. C , vol.112 , pp. 8850-8855
    • Wang, G.1    Chen, D.2    Zhang, H.3    Zhang, J.Z.4    Li, J.5
  • 7
    • 34247480033 scopus 로고    scopus 로고
    • Fabrication and Luminescent Properties of c-Axis Oriented ZnO-ZnS Core-Shell and ZnS Nanorod Arrays by Sulfidation of Aligned ZnO Nanorod Arrays
    • 10.1021/jp068391c 1:CAS:528:DC%2BD2sXis1ans7w%3D
    • SK Panda A Dev S Chaudhuri 2007 Fabrication and Luminescent Properties of c-Axis Oriented ZnO-ZnS Core-Shell and ZnS Nanorod Arrays by Sulfidation of Aligned ZnO Nanorod Arrays J. Phys. Chem. C 111 5039 5043 10.1021/jp068391c 1:CAS:528:DC%2BD2sXis1ans7w%3D
    • (2007) J. Phys. Chem. C , vol.111 , pp. 5039-5043
    • Panda, S.K.1    Dev, A.2    Chaudhuri, S.3
  • 8
    • 57949116414 scopus 로고    scopus 로고
    • Growth of Horizontal ZnO Nanowire Arrays on Any Substrate
    • 1:CAS:528:DC%2BD1cXhtlCqtbrN
    • Y Qin R Yang ZL Wang 2008 Growth of Horizontal ZnO Nanowire Arrays on Any Substrate J. Phys. Chem. C 112 18734 18736 1:CAS:528:DC%2BD1cXhtlCqtbrN
    • (2008) J. Phys. Chem. C , vol.112 , pp. 18734-18736
    • Qin, Y.1    Yang, R.2    Wang, Z.L.3
  • 9
    • 23244441072 scopus 로고    scopus 로고
    • General Route to Vertical ZnO Nanowire Arrays Using Textured ZnO Seeds
    • 10.1021/nl050788p 1:CAS:528:DC%2BD2MXltlegu7c%3D
    • LE Greene M Law DH Tan M Montano J Goldberger G Somorjai P Yang 2005 General Route to Vertical ZnO Nanowire Arrays Using Textured ZnO Seeds Nano Lett. 5 1231 1236 10.1021/nl050788p 1:CAS:528:DC%2BD2MXltlegu7c%3D
    • (2005) Nano Lett. , vol.5 , pp. 1231-1236
    • Greene, L.E.1    Law, M.2    Tan, D.H.3    Montano, M.4    Goldberger, J.5    Somorjai, G.6    Yang, P.7
  • 10
    • 34250368024 scopus 로고    scopus 로고
    • Direct Electrodeposition of ZnO Nanotube Arrays in Anodic Alumina Membranes
    • 10.1021/jp0711242 1:CAS:528:DC%2BD2sXks12ms7g%3D
    • L Li S Pan X Dou Y Zhu X Huang Y Yang G Li L Zhang 2007 Direct Electrodeposition of ZnO Nanotube Arrays in Anodic Alumina Membranes J. Phys. Chem. C 111 7288 7291 10.1021/jp0711242 1:CAS:528:DC%2BD2sXks12ms7g%3D
    • (2007) J. Phys. Chem. C , vol.111 , pp. 7288-7291
    • Li, L.1    Pan, S.2    Dou, X.3    Zhu, Y.4    Huang, X.5    Yang, Y.6    Li, G.7    Zhang, L.8
  • 11
    • 14844315997 scopus 로고    scopus 로고
    • Fabrication of ZnO Nanorods and Nanotubes in Aqueous Solutions
    • 10.1021/cm048144q
    • Q Li V Kumar Y Li H Zhang TJ Marks RPH Chang 2005 Fabrication of ZnO Nanorods and Nanotubes in Aqueous Solutions Chem. Mater. 17 1001 1006 10.1021/cm048144q
    • (2005) Chem. Mater. , vol.17 , pp. 1001-1006
    • Li, Q.1    Kumar, V.2    Li, Y.3    Zhang, H.4    Marks, T.J.5    Chang, R.P.H.6
  • 12
    • 38849097639 scopus 로고    scopus 로고
    • Controllable Fabrication and Photocatalytic Activity of ZnO Nanobelt Arrays
    • 10.1021/jp710071f 1:CAS:528:DC%2BD2sXhsVOntLrL
    • T Sun J Qiu C Liang 2008 Controllable Fabrication and Photocatalytic Activity of ZnO Nanobelt Arrays J. Phys. Chem. C 112 715 721 10.1021/jp710071f 1:CAS:528:DC%2BD2sXhsVOntLrL
    • (2008) J. Phys. Chem. C , vol.112 , pp. 715-721
    • Sun, T.1    Qiu, J.2    Liang, C.3
  • 13
    • 34247518655 scopus 로고    scopus 로고
    • 2 Semiconductors Nanobelts
    • 10.1021/jp068792s 1:CAS:528:DC%2BD2sXisF2hsr0%3D
    • 2 Semiconductors Nanobelts J. Phys. Chem. C 111 5044 5049 10.1021/jp068792s 1:CAS:528:DC%2BD2sXisF2hsr0%3D
    • (2007) J. Phys. Chem. C , vol.111 , pp. 5044-5049
    • Shen, G.Z.1    Bando, Y.2    Golberg, D.3
  • 14
    • 0034635396 scopus 로고    scopus 로고
    • Zener Model Description of Ferromagnetism in Zinc Blended Magnetic Semiconductors
    • 10.1126/science.287.5455.1019 1:CAS:528:DC%2BD3cXhtFyksbY%3D
    • T Dietl H Ohno F Matsukura, et al. 2000 Zener Model Description of Ferromagnetism in Zinc Blended Magnetic Semiconductors Science 287 1019 1022 10.1126/science.287.5455.1019 1:CAS:528:DC%2BD3cXhtFyksbY%3D
    • (2000) Science , vol.287 , pp. 1019-1022
    • Dietl, T.1    Ohno, H.2    Matsukura, F.3
  • 15
  • 16
    • 0035669114 scopus 로고    scopus 로고
    • Electronic Structure and Ferromagnetism of Transition Metal Impurity Doped Zinc Oxide
    • 10.1016/S0921-4526(01)00834-1
    • K Sato H Katayama-Yoshida 2001 Electronic Structure and Ferromagnetism of Transition Metal Impurity Doped Zinc Oxide Physica B 310 904 10.1016/S0921-4526(01)00834-1
    • (2001) Physica B , vol.310 , pp. 904
    • Sato, K.1    Katayama-Yoshida, H.2
  • 18
    • 0035852089 scopus 로고    scopus 로고
    • Electronic Absorption Spectroscopy of Cobalt Ions in Diluted Magnetic Semiconductor Quantum Dots: Demonstration of an Isocrystalline Core/Shell Synthetic Method
    • 10.1021/ja0115215 1:CAS:528:DC%2BD3MXotlKktb0%3D
    • PV Radovanovic DR Gamelin 2001 Electronic Absorption Spectroscopy of Cobalt Ions in Diluted Magnetic Semiconductor Quantum Dots: Demonstration of an Isocrystalline Core/Shell Synthetic Method J. Am. Chem. Soc. 123 12207 12214 10.1021/ja0115215 1:CAS:528:DC%2BD3MXotlKktb0%3D
    • (2001) J. Am. Chem. Soc. , vol.123 , pp. 12207-12214
    • Radovanovic, P.V.1    Gamelin, D.R.2
  • 19
    • 0038317929 scopus 로고    scopus 로고
    • Magnetic Semiconductors Based on Cobalt Substituted ZnO
    • 10.1063/1.1556115 1:CAS:528:DC%2BD3sXjslSltbY%3D
    • K Rode A Anane R Mattana P Contour O Durand R LeBourgeois 2003 Magnetic Semiconductors Based on Cobalt Substituted ZnO J. Appl. Phys. 93 7676 10.1063/1.1556115 1:CAS:528:DC%2BD3sXjslSltbY%3D
    • (2003) J. Appl. Phys. , vol.93 , pp. 7676
    • Rode, K.1    Anane, A.2    Mattana, R.3    Contour, P.4    Durand, O.5    Lebourgeois, R.6
  • 21
    • 33749371029 scopus 로고    scopus 로고
    • Dissolving Behavior and Stability of ZnO Wires in Biofluids: A Study on Biodegradability and Biocompatibility of ZnO Nanostructures
    • 10.1002/adma.200600200 1:CAS:528:DC%2BD28XhtVOhsLfL
    • J Zhou NS Xu ZL Wang 2006 Dissolving Behavior and Stability of ZnO Wires in Biofluids: A Study on Biodegradability and Biocompatibility of ZnO Nanostructures Adv. Mater. 18 2432 2435 10.1002/adma.200600200 1:CAS:528:DC%2BD28XhtVOhsLfL
    • (2006) Adv. Mater. , vol.18 , pp. 2432-2435
    • Zhou, J.1    Xu, N.S.2    Wang, Z.L.3
  • 22
    • 0025965343 scopus 로고
    • In Vitro Properties of a Chitosan Bonded Hydro-Xyapatite Bone-Filling Paste
    • 10.1016/0142-9612(91)90130-3 1:CAS:528:DyaK3MXhsFSisbk%3D
    • M Ito 1991 In Vitro Properties of a Chitosan Bonded Hydro-Xyapatite Bone-Filling Paste Biomaterials 12 41 45 10.1016/0142-9612(91)90130-3 1:CAS:528:DyaK3MXhsFSisbk%3D
    • (1991) Biomaterials , vol.12 , pp. 41-45
    • Ito, M.1
  • 23
    • 0021959328 scopus 로고
    • Mutagenicity of Endodontic Sealers
    • 10.1016/0142-9612(85)90076-6 1:STN:280:DyaL2M3is1KqsA%3D%3D
    • D Orstavik JK Hongslo 1985 Mutagenicity of Endodontic Sealers Biomaterials 6 129 131 10.1016/0142-9612(85)90076-6 1:STN:280: DyaL2M3is1KqsA%3D%3D
    • (1985) Biomaterials , vol.6 , pp. 129-131
    • Orstavik, D.1    Hongslo, J.K.2
  • 24
    • 3242753678 scopus 로고    scopus 로고
    • Photocatalytic Degradation of Methylene Blue with Metal-Doped Mesoporous Titania under Irradiation of White Light
    • 10.1252/jcej.37.630 1:CAS:528:DC%2BD2cXks12htbk%3D
    • Y Miyake H Tada 2004 Photocatalytic Degradation of Methylene Blue with Metal-Doped Mesoporous Titania Under Irradiation of White Light J. Chem. Eng. Jpn. 37 630 635 10.1252/jcej.37.630 1:CAS:528:DC%2BD2cXks12htbk%3D
    • (2004) J. Chem. Eng. Jpn. , vol.37 , pp. 630-635
    • Miyake, Y.1    Tada, H.2
  • 25
    • 0035676915 scopus 로고    scopus 로고
    • Three-Dimensional Array of Highly Oriented Crystalline ZnO Microtubes
    • 10.1021/cm011160s 1:CAS:528:DC%2BD3MXotVOht7k%3D
    • L Vayssieres G Yi M Kim S Lindquist 2001 Three-Dimensional Array of Highly Oriented Crystalline ZnO Microtubes Chem. Mater. 13 4395 4398 10.1021/cm011160s 1:CAS:528:DC%2BD3MXotVOht7k%3D
    • (2001) Chem. Mater. , vol.13 , pp. 4395-4398
    • Vayssieres, L.1    Yi, G.2    Kim, M.3    Lindquist, S.4
  • 26
    • 33748277986 scopus 로고    scopus 로고
    • Controlled Growth of Aligned Arrays of Cu-Ferrite Nanorods
    • 10.1021/cg0505517 1:CAS:528:DC%2BD28XmtVygsrw%3D
    • ZB Huang Y Zhu ST Wang GF Yin 2006 Controlled Growth of Aligned Arrays of Cu-Ferrite Nanorods Cryst. Growth Des. 6 1931 1935 10.1021/cg0505517 1:CAS:528:DC%2BD28XmtVygsrw%3D
    • (2006) Cryst. Growth Des. , vol.6 , pp. 1931-1935
    • Huang, Z.B.1    Zhu, Y.2    Wang, S.T.3    Yin, G.F.4
  • 27
    • 39549111667 scopus 로고    scopus 로고
    • Well-Aligned ZnO Rod Arrays Grown on Glass Substrate from Aqueous Solution
    • 10.1016/j.apsusc.2007.09.108
    • M Yang GF Yin ZB Huang XM Liao Y Kang YD Yao 2008 Well-Aligned ZnO Rod Arrays Grown on Glass Substrate from Aqueous Solution Appl. Surf. Sci. 256 2917 2921 10.1016/j.apsusc.2007.09.108
    • (2008) Appl. Surf. Sci. , vol.256 , pp. 2917-2921
    • Yang, M.1    Yin, G.F.2    Huang, Z.B.3    Liao, X.M.4    Kang, Y.5    Yao, Y.D.6
  • 28
    • 0037022372 scopus 로고    scopus 로고
    • Low-Temperature Growth of Well-Aligned ZnO Nanorods by Chemical Vapor Deposition
    • 10.1002/1521-4095(20020205)14:3<215::AID-ADMA215>3.0.CO;2-J 1:CAS:528:DC%2BD38Xht1OjurY%3D
    • JJ Wu SC Liu 2002 Low-Temperature Growth of Well-Aligned ZnO Nanorods by Chemical Vapor Deposition Adv. Mater. 14 215 218 10.1002/1521-4095(20020205)14: 3<215::AID-ADMA215>3.0.CO;2-J 1:CAS:528:DC%2BD38Xht1OjurY%3D
    • (2002) Adv. Mater. , vol.14 , pp. 215-218
    • Wu, J.J.1    Liu, S.C.2
  • 29
    • 0042066453 scopus 로고    scopus 로고
    • Monodispersed ZnO Nanoparticles from a Single Molecular Precursor
    • Kim, CG, Sung, K, Chung, TM, Jung, DY, Kim, Y, "Monodispersed ZnO Nanoparticles from a Single Molecular Precursor." Chem. Commun., 2068-2069 (2003)
    • (2003) Chem. Commun. , pp. 2068-2069
    • Kim, C.G.1    Sung, K.2    Chung, T.M.3    Jung, D.Y.4    Kim, Y.5
  • 30
    • 34248401658 scopus 로고    scopus 로고
    • Synthesis of Room Temperature Ferromagnetic Co-Doped ZnO Nanocrystals under a High Magnetic Field
    • 10.1021/jp0684067 1:CAS:528:DC%2BD2sXjsV2ls7s%3D
    • D Chu Y Zeng DL Jiang 2007 Synthesis of Room Temperature Ferromagnetic Co-Doped ZnO Nanocrystals Under a High Magnetic Field J. Phys. Chem. C 111 5893 5897 10.1021/jp0684067 1:CAS:528:DC%2BD2sXjsV2ls7s%3D
    • (2007) J. Phys. Chem. C , vol.111 , pp. 5893-5897
    • Chu, D.1    Zeng, Y.2    Jiang, D.L.3
  • 31
    • 57449113802 scopus 로고    scopus 로고
    • Preparation and Properties of Ni-Doped ZnO Rod Arrays from Aqueous Solution
    • 10.1016/j.jcis.2008.10.067 1:CAS:528:DC%2BD1cXhsFWkurbL
    • DW Wu M Yang ZB Huang GF Yin YD Yao XM Liao, et al. 2009 Preparation and Properties of Ni-Doped ZnO Rod Arrays from Aqueous Solution J. Colloid Interf. 330 380 385 10.1016/j.jcis.2008.10.067 1:CAS:528:DC%2BD1cXhsFWkurbL
    • (2009) J. Colloid Interf. , vol.330 , pp. 380-385
    • Wu, D.W.1    Yang, M.2    Huang, Z.B.3    Yin, G.F.4    Yao, Y.D.5    Liao, X.M.6
  • 32
    • 0035356408 scopus 로고    scopus 로고
    • Magneto-Optical Properties of ZnO Based Diluted Magnetic Semiconductors
    • 10.1063/1.1356035 1:CAS:528:DC%2BD3MXkt1aiu7w%3D
    • K Ando H Saito Z Jin T Fukumura M Kawasaki, et al. 2001 Magneto-Optical Properties of ZnO Based Diluted Magnetic Semiconductors J. Appl. Phys. 89 7284 7286 10.1063/1.1356035 1:CAS:528:DC%2BD3MXkt1aiu7w%3D
    • (2001) J. Appl. Phys. , vol.89 , pp. 7284-7286
    • Ando, K.1    Saito, H.2    Jin, Z.3    Fukumura, T.4    Kawasaki, M.5
  • 33
    • 47249099825 scopus 로고    scopus 로고
    • Local Structural Evolution of Co Doped ZnO Nanoparticles Upon Calcination Studied by in Situ Quick-Scan XAFS
    • 10.1021/jp075864m 1:CAS:528:DC%2BD1cXhvV2msLc%3D
    • T Liu H Xu WS Chin Z Yong ATS Wee 2008 Local Structural Evolution of Co Doped ZnO Nanoparticles Upon Calcination Studied by In Situ Quick-Scan XAFS J. Phys. Chem. C 112 3489 3495 10.1021/jp075864m 1:CAS:528:DC%2BD1cXhvV2msLc%3D
    • (2008) J. Phys. Chem. C , vol.112 , pp. 3489-3495
    • Liu, T.1    Xu, H.2    Chin, W.S.3    Yong, Z.4    Wee, A.T.S.5
  • 35
    • 0017556846 scopus 로고
    • The Work Function of the Elements and Its Periodicity
    • 10.1063/1.323539 1:CAS:528:DyaE1cXjtVOhuw%3D%3D
    • HB Michaelson 1977 The Work Function of the Elements and Its Periodicity J. Appl. Phys. 48 4729 10.1063/1.323539 1:CAS:528:DyaE1cXjtVOhuw%3D%3D
    • (1977) J. Appl. Phys. , vol.48 , pp. 4729
    • Michaelson, H.B.1
  • 36
    • 33846644090 scopus 로고    scopus 로고
    • Diameter Dependent Transport Properties of Gallium Nitride Nanowire Field Effect Transistors
    • 10.1063/1.2434153
    • A Motayed M Vaudin AV Davydov J Melngailis, et al. 2007 Diameter Dependent Transport Properties of Gallium Nitride Nanowire Field Effect Transistors Appl. Phys. Lett. 90 043104 10.1063/1.2434153
    • (2007) Appl. Phys. Lett. , vol.90 , pp. 043104
    • Motayed, A.1    Vaudin, M.2    Davydov, A.V.3    Melngailis, J.4
  • 38
    • 70449103171 scopus 로고    scopus 로고
    • Three-Dimensional Nanostructured Substrates Toward Efficient Capture of Circulating Tumor Cells
    • 10.1002/anie.200901668 1:CAS:528:DC%2BD1MXhtl2rs7zL
    • S Wang H Wang J Jiao K Chen, et al. 2009 Three-Dimensional Nanostructured Substrates Toward Efficient Capture of Circulating Tumor Cells Angew. Chem. Int. Ed. 48 8970 8973 10.1002/anie.200901668 1:CAS:528:DC%2BD1MXhtl2rs7zL
    • (2009) Angew. Chem. Int. Ed. , vol.48 , pp. 8970-8973
    • Wang, S.1    Wang, H.2    Jiao, J.3    Chen, K.4


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.