Abstract

A new composite consisting of ZnO nanorods decorated with Ag2O nanoparticles has been synthesized and characterized. It is found that the band gap emission of ZnO nanorods can be greatly enhanced by about 10 times, while the defect emission can be suppressed to the detection limit, simultaneously. The ratio between the band gap and defect emission reaches to an enhanced factor of about 600 times. The underlying mechanism is attributed to the combined effects of surface modification, band alignment, as well as charge transfer. Our approach provided here can be extended to many other semiconductors for creating nanocomposites with novel optical properties.

© 2009 Optical Society of America

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  1. N. E. Hsu, W. K. Hung, and Y. F. Chen, "Origin of defect emission identified by polarized luminescence from aligned ZnO nanorods," J. Appl. Phys. 96, 4671-4673 (2004).
    [CrossRef]
  2. H. Y. Lin, C. L. Cheng, Y. Y. Chou, L. L. Huang, and Y. F. Chen, "Enhancement of band gap emission stimulated by defect loss," Opt. Express 14, 2372-2379 (2006).
    [CrossRef] [PubMed]
  3. F. Leiter, H. Alves, D. Pfisterer, N. G. Romanov, D. M. Hofmann, and B. K. Meyer, "Oxygen vacancies in ZnO," Physica B 340-342, 201-204 (2003).
    [CrossRef]
  4. X. M. Fan, J. S. Lian, Z. X. Guo,and H. J. Lu, "Microstructure and photoluminescence properties of ZnO thin films grown by PLD on Si(100) substrates," Appl. Surf. Science 239, 176-181 (2005).
    [CrossRef]
  5. K. Vanheusden, W. L. Warren, C. L. Seage, D. L. Tallent, J. A. Voigtang, and B. E. Gnade, "Mechanisms behind green photoluminescence in ZnO phosphor powders," J. Appl. Phys. 79, 7983-7990 (1996).
    [CrossRef]
  6. A. Van Dijken, E. A. Meulenkamp, D. Vanmaekelbergh, and A. Meilerink, "The luminescence of nanocrystalline ZnO particles: the mechanism of the ultraviolet and visible emission," J. Lumin. 87-89, 454-456 (2000).
    [CrossRef]
  7. J. M. Lin, H. Y. Lin, C. L. Cheng, and Y. F. Chen, "Giant enhancement of bandgap emission of ZnO nanorods by platinum nanoparticles," Nanotechnology 17, 4391-4394 (2006).
    [CrossRef]
  8. Y. Zhang, Z. Zhang, B. Lin, Z. Fu, and J. Xu, "Effects of Ag doping on the photoluminescence of ZnO films grown on Si substrates," J. Phys. Chem. 109, 19200-3 (2005).
    [CrossRef]
  9. L. Duan, W. Zhang, S. Zhong, and Z. Fu, "Enhancement of ultraviolet emissions from ZnO films by Ag doping," Appl. Phys. Lett. 88, 232110-3 (2006).
    [CrossRef]
  10. Q1. C. W. Lai, J. An, and H. C. Ong, "Surface-plasmon-mediated emission from metal-capped ZnO thin films," Appl. Phys. Lett. 86, 251105-3 (2005).
    [CrossRef]
  11. H. Y. Lin, Y. Y. Chou, C. L. Cheng, and Y. F. Chen, "Giant enhancement of band edge emission based on ZnO/TiO2 nanocomposites," Opt. Express 15, 13832-13837 (2007).
    [CrossRef] [PubMed]
  12. J. M. Lin, C. L. Cheng, H. Y. Lin, and Y. F. Chen, "Giant enhancement of band edge emission in ZnO and SnO nanocomposites," Opt. Lett. 31, 3173-3175 (2006).
    [CrossRef] [PubMed]
  13. Y. Cui, and C. M. Lieber, "Functional nanoscale electronic devices assembled using silicon nanowire building blocks," Science 291, 851-853 (2001).
    [CrossRef] [PubMed]
  14. X. Duan, Y. Huang, Y. Cui, J. Wang, and C. M. Lieber, "Indium phosphide nanowires as building blocks for nanoscale electronic and optoelectronic devices," Nature (London) 409, 66-69(2001).
    [CrossRef]
  15. L. A. Peyser, A. E. Vinson, A. P. Bartko, and M. R. Dickson, "Photoactivated fluorescence from individual silver nanoclusters," Science 291, 103-106 (2001).
    [CrossRef] [PubMed]
  16. N. Ohashi, T. Ishigaki, N. Okada, T. Sekiguchi, and H. Haneda, "Effect of hydrogen doping on ultraviolet emission spectra of various types of ZnO," Appl. Phys. Lett. 80, 2869-2871 (2002).
    [CrossRef]
  17. T. Gao, Q. H. Li, and T. H. Wang, "Sonochemical synthesis, optical properties, and electrical properties of core/shell-type ZnO nanorods/CdS nanoparticles composites," Chem. Mater. 17, 887-892 (2005).
    [CrossRef]
  18. J. J. Wu, and S. C. Liu, "Low-temperature growth of well-aligned ZnO nanorods by chemical vapor deposition," Adv. Mater. 14, 215-218 (2002).
    [CrossRef]

2007 (1)

2006 (4)

L. Duan, W. Zhang, S. Zhong, and Z. Fu, "Enhancement of ultraviolet emissions from ZnO films by Ag doping," Appl. Phys. Lett. 88, 232110-3 (2006).
[CrossRef]

J. M. Lin, H. Y. Lin, C. L. Cheng, and Y. F. Chen, "Giant enhancement of bandgap emission of ZnO nanorods by platinum nanoparticles," Nanotechnology 17, 4391-4394 (2006).
[CrossRef]

H. Y. Lin, C. L. Cheng, Y. Y. Chou, L. L. Huang, and Y. F. Chen, "Enhancement of band gap emission stimulated by defect loss," Opt. Express 14, 2372-2379 (2006).
[CrossRef] [PubMed]

J. M. Lin, C. L. Cheng, H. Y. Lin, and Y. F. Chen, "Giant enhancement of band edge emission in ZnO and SnO nanocomposites," Opt. Lett. 31, 3173-3175 (2006).
[CrossRef] [PubMed]

2005 (4)

Y. Zhang, Z. Zhang, B. Lin, Z. Fu, and J. Xu, "Effects of Ag doping on the photoluminescence of ZnO films grown on Si substrates," J. Phys. Chem. 109, 19200-3 (2005).
[CrossRef]

T. Gao, Q. H. Li, and T. H. Wang, "Sonochemical synthesis, optical properties, and electrical properties of core/shell-type ZnO nanorods/CdS nanoparticles composites," Chem. Mater. 17, 887-892 (2005).
[CrossRef]

Q1. C. W. Lai, J. An, and H. C. Ong, "Surface-plasmon-mediated emission from metal-capped ZnO thin films," Appl. Phys. Lett. 86, 251105-3 (2005).
[CrossRef]

X. M. Fan, J. S. Lian, Z. X. Guo,and H. J. Lu, "Microstructure and photoluminescence properties of ZnO thin films grown by PLD on Si(100) substrates," Appl. Surf. Science 239, 176-181 (2005).
[CrossRef]

2004 (1)

N. E. Hsu, W. K. Hung, and Y. F. Chen, "Origin of defect emission identified by polarized luminescence from aligned ZnO nanorods," J. Appl. Phys. 96, 4671-4673 (2004).
[CrossRef]

2003 (1)

F. Leiter, H. Alves, D. Pfisterer, N. G. Romanov, D. M. Hofmann, and B. K. Meyer, "Oxygen vacancies in ZnO," Physica B 340-342, 201-204 (2003).
[CrossRef]

2002 (2)

N. Ohashi, T. Ishigaki, N. Okada, T. Sekiguchi, and H. Haneda, "Effect of hydrogen doping on ultraviolet emission spectra of various types of ZnO," Appl. Phys. Lett. 80, 2869-2871 (2002).
[CrossRef]

J. J. Wu, and S. C. Liu, "Low-temperature growth of well-aligned ZnO nanorods by chemical vapor deposition," Adv. Mater. 14, 215-218 (2002).
[CrossRef]

2001 (3)

Y. Cui, and C. M. Lieber, "Functional nanoscale electronic devices assembled using silicon nanowire building blocks," Science 291, 851-853 (2001).
[CrossRef] [PubMed]

X. Duan, Y. Huang, Y. Cui, J. Wang, and C. M. Lieber, "Indium phosphide nanowires as building blocks for nanoscale electronic and optoelectronic devices," Nature (London) 409, 66-69(2001).
[CrossRef]

L. A. Peyser, A. E. Vinson, A. P. Bartko, and M. R. Dickson, "Photoactivated fluorescence from individual silver nanoclusters," Science 291, 103-106 (2001).
[CrossRef] [PubMed]

2000 (1)

A. Van Dijken, E. A. Meulenkamp, D. Vanmaekelbergh, and A. Meilerink, "The luminescence of nanocrystalline ZnO particles: the mechanism of the ultraviolet and visible emission," J. Lumin. 87-89, 454-456 (2000).
[CrossRef]

1996 (1)

K. Vanheusden, W. L. Warren, C. L. Seage, D. L. Tallent, J. A. Voigtang, and B. E. Gnade, "Mechanisms behind green photoluminescence in ZnO phosphor powders," J. Appl. Phys. 79, 7983-7990 (1996).
[CrossRef]

Alves, H.

F. Leiter, H. Alves, D. Pfisterer, N. G. Romanov, D. M. Hofmann, and B. K. Meyer, "Oxygen vacancies in ZnO," Physica B 340-342, 201-204 (2003).
[CrossRef]

An, J.

Q1. C. W. Lai, J. An, and H. C. Ong, "Surface-plasmon-mediated emission from metal-capped ZnO thin films," Appl. Phys. Lett. 86, 251105-3 (2005).
[CrossRef]

Bartko, A. P.

L. A. Peyser, A. E. Vinson, A. P. Bartko, and M. R. Dickson, "Photoactivated fluorescence from individual silver nanoclusters," Science 291, 103-106 (2001).
[CrossRef] [PubMed]

Chen, Y. F.

Cheng, C. L.

Chou, Y. Y.

Cui, Y.

Y. Cui, and C. M. Lieber, "Functional nanoscale electronic devices assembled using silicon nanowire building blocks," Science 291, 851-853 (2001).
[CrossRef] [PubMed]

X. Duan, Y. Huang, Y. Cui, J. Wang, and C. M. Lieber, "Indium phosphide nanowires as building blocks for nanoscale electronic and optoelectronic devices," Nature (London) 409, 66-69(2001).
[CrossRef]

Dickson, M. R.

L. A. Peyser, A. E. Vinson, A. P. Bartko, and M. R. Dickson, "Photoactivated fluorescence from individual silver nanoclusters," Science 291, 103-106 (2001).
[CrossRef] [PubMed]

Duan, L.

L. Duan, W. Zhang, S. Zhong, and Z. Fu, "Enhancement of ultraviolet emissions from ZnO films by Ag doping," Appl. Phys. Lett. 88, 232110-3 (2006).
[CrossRef]

Duan, X.

X. Duan, Y. Huang, Y. Cui, J. Wang, and C. M. Lieber, "Indium phosphide nanowires as building blocks for nanoscale electronic and optoelectronic devices," Nature (London) 409, 66-69(2001).
[CrossRef]

Fan, X. M.

X. M. Fan, J. S. Lian, Z. X. Guo,and H. J. Lu, "Microstructure and photoluminescence properties of ZnO thin films grown by PLD on Si(100) substrates," Appl. Surf. Science 239, 176-181 (2005).
[CrossRef]

Fu, Z.

L. Duan, W. Zhang, S. Zhong, and Z. Fu, "Enhancement of ultraviolet emissions from ZnO films by Ag doping," Appl. Phys. Lett. 88, 232110-3 (2006).
[CrossRef]

Y. Zhang, Z. Zhang, B. Lin, Z. Fu, and J. Xu, "Effects of Ag doping on the photoluminescence of ZnO films grown on Si substrates," J. Phys. Chem. 109, 19200-3 (2005).
[CrossRef]

Gao, T.

T. Gao, Q. H. Li, and T. H. Wang, "Sonochemical synthesis, optical properties, and electrical properties of core/shell-type ZnO nanorods/CdS nanoparticles composites," Chem. Mater. 17, 887-892 (2005).
[CrossRef]

Gnade, B. E.

K. Vanheusden, W. L. Warren, C. L. Seage, D. L. Tallent, J. A. Voigtang, and B. E. Gnade, "Mechanisms behind green photoluminescence in ZnO phosphor powders," J. Appl. Phys. 79, 7983-7990 (1996).
[CrossRef]

Guo, Z. X.

X. M. Fan, J. S. Lian, Z. X. Guo,and H. J. Lu, "Microstructure and photoluminescence properties of ZnO thin films grown by PLD on Si(100) substrates," Appl. Surf. Science 239, 176-181 (2005).
[CrossRef]

Haneda, H.

N. Ohashi, T. Ishigaki, N. Okada, T. Sekiguchi, and H. Haneda, "Effect of hydrogen doping on ultraviolet emission spectra of various types of ZnO," Appl. Phys. Lett. 80, 2869-2871 (2002).
[CrossRef]

Hofmann, D. M.

F. Leiter, H. Alves, D. Pfisterer, N. G. Romanov, D. M. Hofmann, and B. K. Meyer, "Oxygen vacancies in ZnO," Physica B 340-342, 201-204 (2003).
[CrossRef]

Hsu, N. E.

N. E. Hsu, W. K. Hung, and Y. F. Chen, "Origin of defect emission identified by polarized luminescence from aligned ZnO nanorods," J. Appl. Phys. 96, 4671-4673 (2004).
[CrossRef]

Huang, L. L.

Huang, Y.

X. Duan, Y. Huang, Y. Cui, J. Wang, and C. M. Lieber, "Indium phosphide nanowires as building blocks for nanoscale electronic and optoelectronic devices," Nature (London) 409, 66-69(2001).
[CrossRef]

Hung, W. K.

N. E. Hsu, W. K. Hung, and Y. F. Chen, "Origin of defect emission identified by polarized luminescence from aligned ZnO nanorods," J. Appl. Phys. 96, 4671-4673 (2004).
[CrossRef]

Ishigaki, T.

N. Ohashi, T. Ishigaki, N. Okada, T. Sekiguchi, and H. Haneda, "Effect of hydrogen doping on ultraviolet emission spectra of various types of ZnO," Appl. Phys. Lett. 80, 2869-2871 (2002).
[CrossRef]

Lai, C. W.

Q1. C. W. Lai, J. An, and H. C. Ong, "Surface-plasmon-mediated emission from metal-capped ZnO thin films," Appl. Phys. Lett. 86, 251105-3 (2005).
[CrossRef]

Leiter, F.

F. Leiter, H. Alves, D. Pfisterer, N. G. Romanov, D. M. Hofmann, and B. K. Meyer, "Oxygen vacancies in ZnO," Physica B 340-342, 201-204 (2003).
[CrossRef]

Li, Q. H.

T. Gao, Q. H. Li, and T. H. Wang, "Sonochemical synthesis, optical properties, and electrical properties of core/shell-type ZnO nanorods/CdS nanoparticles composites," Chem. Mater. 17, 887-892 (2005).
[CrossRef]

Lian, J. S.

X. M. Fan, J. S. Lian, Z. X. Guo,and H. J. Lu, "Microstructure and photoluminescence properties of ZnO thin films grown by PLD on Si(100) substrates," Appl. Surf. Science 239, 176-181 (2005).
[CrossRef]

Lieber, C. M.

X. Duan, Y. Huang, Y. Cui, J. Wang, and C. M. Lieber, "Indium phosphide nanowires as building blocks for nanoscale electronic and optoelectronic devices," Nature (London) 409, 66-69(2001).
[CrossRef]

Y. Cui, and C. M. Lieber, "Functional nanoscale electronic devices assembled using silicon nanowire building blocks," Science 291, 851-853 (2001).
[CrossRef] [PubMed]

Lin, B.

Y. Zhang, Z. Zhang, B. Lin, Z. Fu, and J. Xu, "Effects of Ag doping on the photoluminescence of ZnO films grown on Si substrates," J. Phys. Chem. 109, 19200-3 (2005).
[CrossRef]

Lin, H. Y.

Lin, J. M.

J. M. Lin, C. L. Cheng, H. Y. Lin, and Y. F. Chen, "Giant enhancement of band edge emission in ZnO and SnO nanocomposites," Opt. Lett. 31, 3173-3175 (2006).
[CrossRef] [PubMed]

J. M. Lin, H. Y. Lin, C. L. Cheng, and Y. F. Chen, "Giant enhancement of bandgap emission of ZnO nanorods by platinum nanoparticles," Nanotechnology 17, 4391-4394 (2006).
[CrossRef]

Liu, S. C.

J. J. Wu, and S. C. Liu, "Low-temperature growth of well-aligned ZnO nanorods by chemical vapor deposition," Adv. Mater. 14, 215-218 (2002).
[CrossRef]

Lu, H. J.

X. M. Fan, J. S. Lian, Z. X. Guo,and H. J. Lu, "Microstructure and photoluminescence properties of ZnO thin films grown by PLD on Si(100) substrates," Appl. Surf. Science 239, 176-181 (2005).
[CrossRef]

Meilerink, A.

A. Van Dijken, E. A. Meulenkamp, D. Vanmaekelbergh, and A. Meilerink, "The luminescence of nanocrystalline ZnO particles: the mechanism of the ultraviolet and visible emission," J. Lumin. 87-89, 454-456 (2000).
[CrossRef]

Meulenkamp, E. A.

A. Van Dijken, E. A. Meulenkamp, D. Vanmaekelbergh, and A. Meilerink, "The luminescence of nanocrystalline ZnO particles: the mechanism of the ultraviolet and visible emission," J. Lumin. 87-89, 454-456 (2000).
[CrossRef]

Meyer, B. K.

F. Leiter, H. Alves, D. Pfisterer, N. G. Romanov, D. M. Hofmann, and B. K. Meyer, "Oxygen vacancies in ZnO," Physica B 340-342, 201-204 (2003).
[CrossRef]

Ohashi, N.

N. Ohashi, T. Ishigaki, N. Okada, T. Sekiguchi, and H. Haneda, "Effect of hydrogen doping on ultraviolet emission spectra of various types of ZnO," Appl. Phys. Lett. 80, 2869-2871 (2002).
[CrossRef]

Okada, N.

N. Ohashi, T. Ishigaki, N. Okada, T. Sekiguchi, and H. Haneda, "Effect of hydrogen doping on ultraviolet emission spectra of various types of ZnO," Appl. Phys. Lett. 80, 2869-2871 (2002).
[CrossRef]

Ong, H. C.

Q1. C. W. Lai, J. An, and H. C. Ong, "Surface-plasmon-mediated emission from metal-capped ZnO thin films," Appl. Phys. Lett. 86, 251105-3 (2005).
[CrossRef]

Peyser, L. A.

L. A. Peyser, A. E. Vinson, A. P. Bartko, and M. R. Dickson, "Photoactivated fluorescence from individual silver nanoclusters," Science 291, 103-106 (2001).
[CrossRef] [PubMed]

Pfisterer, D.

F. Leiter, H. Alves, D. Pfisterer, N. G. Romanov, D. M. Hofmann, and B. K. Meyer, "Oxygen vacancies in ZnO," Physica B 340-342, 201-204 (2003).
[CrossRef]

Romanov, N. G.

F. Leiter, H. Alves, D. Pfisterer, N. G. Romanov, D. M. Hofmann, and B. K. Meyer, "Oxygen vacancies in ZnO," Physica B 340-342, 201-204 (2003).
[CrossRef]

Seage, C. L.

K. Vanheusden, W. L. Warren, C. L. Seage, D. L. Tallent, J. A. Voigtang, and B. E. Gnade, "Mechanisms behind green photoluminescence in ZnO phosphor powders," J. Appl. Phys. 79, 7983-7990 (1996).
[CrossRef]

Sekiguchi, T.

N. Ohashi, T. Ishigaki, N. Okada, T. Sekiguchi, and H. Haneda, "Effect of hydrogen doping on ultraviolet emission spectra of various types of ZnO," Appl. Phys. Lett. 80, 2869-2871 (2002).
[CrossRef]

Tallent, D. L.

K. Vanheusden, W. L. Warren, C. L. Seage, D. L. Tallent, J. A. Voigtang, and B. E. Gnade, "Mechanisms behind green photoluminescence in ZnO phosphor powders," J. Appl. Phys. 79, 7983-7990 (1996).
[CrossRef]

Van Dijken, A.

A. Van Dijken, E. A. Meulenkamp, D. Vanmaekelbergh, and A. Meilerink, "The luminescence of nanocrystalline ZnO particles: the mechanism of the ultraviolet and visible emission," J. Lumin. 87-89, 454-456 (2000).
[CrossRef]

Vanheusden, K.

K. Vanheusden, W. L. Warren, C. L. Seage, D. L. Tallent, J. A. Voigtang, and B. E. Gnade, "Mechanisms behind green photoluminescence in ZnO phosphor powders," J. Appl. Phys. 79, 7983-7990 (1996).
[CrossRef]

Vanmaekelbergh, D.

A. Van Dijken, E. A. Meulenkamp, D. Vanmaekelbergh, and A. Meilerink, "The luminescence of nanocrystalline ZnO particles: the mechanism of the ultraviolet and visible emission," J. Lumin. 87-89, 454-456 (2000).
[CrossRef]

Vinson, A. E.

L. A. Peyser, A. E. Vinson, A. P. Bartko, and M. R. Dickson, "Photoactivated fluorescence from individual silver nanoclusters," Science 291, 103-106 (2001).
[CrossRef] [PubMed]

Voigtang, J. A.

K. Vanheusden, W. L. Warren, C. L. Seage, D. L. Tallent, J. A. Voigtang, and B. E. Gnade, "Mechanisms behind green photoluminescence in ZnO phosphor powders," J. Appl. Phys. 79, 7983-7990 (1996).
[CrossRef]

Wang, J.

X. Duan, Y. Huang, Y. Cui, J. Wang, and C. M. Lieber, "Indium phosphide nanowires as building blocks for nanoscale electronic and optoelectronic devices," Nature (London) 409, 66-69(2001).
[CrossRef]

Wang, T. H.

T. Gao, Q. H. Li, and T. H. Wang, "Sonochemical synthesis, optical properties, and electrical properties of core/shell-type ZnO nanorods/CdS nanoparticles composites," Chem. Mater. 17, 887-892 (2005).
[CrossRef]

Warren, W. L.

K. Vanheusden, W. L. Warren, C. L. Seage, D. L. Tallent, J. A. Voigtang, and B. E. Gnade, "Mechanisms behind green photoluminescence in ZnO phosphor powders," J. Appl. Phys. 79, 7983-7990 (1996).
[CrossRef]

Wu, J. J.

J. J. Wu, and S. C. Liu, "Low-temperature growth of well-aligned ZnO nanorods by chemical vapor deposition," Adv. Mater. 14, 215-218 (2002).
[CrossRef]

Xu, J.

Y. Zhang, Z. Zhang, B. Lin, Z. Fu, and J. Xu, "Effects of Ag doping on the photoluminescence of ZnO films grown on Si substrates," J. Phys. Chem. 109, 19200-3 (2005).
[CrossRef]

Zhang, W.

L. Duan, W. Zhang, S. Zhong, and Z. Fu, "Enhancement of ultraviolet emissions from ZnO films by Ag doping," Appl. Phys. Lett. 88, 232110-3 (2006).
[CrossRef]

Zhang, Y.

Y. Zhang, Z. Zhang, B. Lin, Z. Fu, and J. Xu, "Effects of Ag doping on the photoluminescence of ZnO films grown on Si substrates," J. Phys. Chem. 109, 19200-3 (2005).
[CrossRef]

Zhang, Z.

Y. Zhang, Z. Zhang, B. Lin, Z. Fu, and J. Xu, "Effects of Ag doping on the photoluminescence of ZnO films grown on Si substrates," J. Phys. Chem. 109, 19200-3 (2005).
[CrossRef]

Zhong, S.

L. Duan, W. Zhang, S. Zhong, and Z. Fu, "Enhancement of ultraviolet emissions from ZnO films by Ag doping," Appl. Phys. Lett. 88, 232110-3 (2006).
[CrossRef]

Adv. Mater. (1)

J. J. Wu, and S. C. Liu, "Low-temperature growth of well-aligned ZnO nanorods by chemical vapor deposition," Adv. Mater. 14, 215-218 (2002).
[CrossRef]

Appl. Phys. Lett. (3)

N. Ohashi, T. Ishigaki, N. Okada, T. Sekiguchi, and H. Haneda, "Effect of hydrogen doping on ultraviolet emission spectra of various types of ZnO," Appl. Phys. Lett. 80, 2869-2871 (2002).
[CrossRef]

L. Duan, W. Zhang, S. Zhong, and Z. Fu, "Enhancement of ultraviolet emissions from ZnO films by Ag doping," Appl. Phys. Lett. 88, 232110-3 (2006).
[CrossRef]

Q1. C. W. Lai, J. An, and H. C. Ong, "Surface-plasmon-mediated emission from metal-capped ZnO thin films," Appl. Phys. Lett. 86, 251105-3 (2005).
[CrossRef]

Appl. Surf. Science (1)

X. M. Fan, J. S. Lian, Z. X. Guo,and H. J. Lu, "Microstructure and photoluminescence properties of ZnO thin films grown by PLD on Si(100) substrates," Appl. Surf. Science 239, 176-181 (2005).
[CrossRef]

Chem. Mater. (1)

T. Gao, Q. H. Li, and T. H. Wang, "Sonochemical synthesis, optical properties, and electrical properties of core/shell-type ZnO nanorods/CdS nanoparticles composites," Chem. Mater. 17, 887-892 (2005).
[CrossRef]

J. Appl. Phys. (2)

N. E. Hsu, W. K. Hung, and Y. F. Chen, "Origin of defect emission identified by polarized luminescence from aligned ZnO nanorods," J. Appl. Phys. 96, 4671-4673 (2004).
[CrossRef]

K. Vanheusden, W. L. Warren, C. L. Seage, D. L. Tallent, J. A. Voigtang, and B. E. Gnade, "Mechanisms behind green photoluminescence in ZnO phosphor powders," J. Appl. Phys. 79, 7983-7990 (1996).
[CrossRef]

J. Lumin. (1)

A. Van Dijken, E. A. Meulenkamp, D. Vanmaekelbergh, and A. Meilerink, "The luminescence of nanocrystalline ZnO particles: the mechanism of the ultraviolet and visible emission," J. Lumin. 87-89, 454-456 (2000).
[CrossRef]

J. Phys. Chem. (1)

Y. Zhang, Z. Zhang, B. Lin, Z. Fu, and J. Xu, "Effects of Ag doping on the photoluminescence of ZnO films grown on Si substrates," J. Phys. Chem. 109, 19200-3 (2005).
[CrossRef]

Nanotechnology (1)

J. M. Lin, H. Y. Lin, C. L. Cheng, and Y. F. Chen, "Giant enhancement of bandgap emission of ZnO nanorods by platinum nanoparticles," Nanotechnology 17, 4391-4394 (2006).
[CrossRef]

Nature (London) (1)

X. Duan, Y. Huang, Y. Cui, J. Wang, and C. M. Lieber, "Indium phosphide nanowires as building blocks for nanoscale electronic and optoelectronic devices," Nature (London) 409, 66-69(2001).
[CrossRef]

Opt. Express (2)

Opt. Lett. (1)

Physica B (1)

F. Leiter, H. Alves, D. Pfisterer, N. G. Romanov, D. M. Hofmann, and B. K. Meyer, "Oxygen vacancies in ZnO," Physica B 340-342, 201-204 (2003).
[CrossRef]

Science (2)

Y. Cui, and C. M. Lieber, "Functional nanoscale electronic devices assembled using silicon nanowire building blocks," Science 291, 851-853 (2001).
[CrossRef] [PubMed]

L. A. Peyser, A. E. Vinson, A. P. Bartko, and M. R. Dickson, "Photoactivated fluorescence from individual silver nanoclusters," Science 291, 103-106 (2001).
[CrossRef] [PubMed]

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Figures (5)

Fig. 1.
Fig. 1.

Scanning electron microscopy images of ZnO nanorods without (a) and with (b) Ag2O nanoparticles.

Fig. 2.
Fig. 2.

(a) X-ray diffraction pattern of Ag2O nanoparticles. (b) Photoluminescence and (c) Photoluminescence excitation spectra of Ag2O nanoparticles.

Fig. 3.
Fig. 3.

(a) Photoluminescence spectra of ZnO nanorods with and without Ag2O nanoparticles. (b) Sputtering time dependence of the intensity ratio of UV and defect emission.

Fig. 4.
Fig. 4.

Carrier transfer process in ZnO/Ag2O composites with and without surface defects in ZnO nanorods.

Fig. 5.
Fig. 5.

Photoluminescence spectra of ZnO nanorods grown by CVD process with and without Ag2O nanoparticles.

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