Surface plasmon enhanced photoconductance and single electron effects in mesoporous titania nanofibers loaded with gold nanoparticles

Min Soo Son, Ji Eun Im, Kang Kyun Wang, Seung Lim Oh, Yong Rok Kim, Kyung Hwa Yoo

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

We have synthesized mesoporous TiO2 nanofibers loaded with Au nanoparticles (MTNF-Au) and fabricated single nanofiber-based devices. MTNF-Au devices exhibited surface plasmon enhanced photoconductance under visible light, whereas MTNF devices without Au nanoparticles did not. Moreover, Coulomb oscillations were observed at 4.2 K in MTNF-Au devices, indicating that Au nanoparticles embedded in MTNF-Au played a role of Coulomb islands. These results suggested that the enhanced photoconductance was ascribed to electron tunneling of hot electrons generated by the surface plasmon resonance.

Original languageEnglish
Article number023115
JournalApplied Physics Letters
Volume96
Issue number2
DOIs
Publication statusPublished - 2010 Jan 25

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titanium
gold
nanoparticles
electrons
electron tunneling
hot electrons
surface plasmon resonance
oscillations

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Cite this

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abstract = "We have synthesized mesoporous TiO2 nanofibers loaded with Au nanoparticles (MTNF-Au) and fabricated single nanofiber-based devices. MTNF-Au devices exhibited surface plasmon enhanced photoconductance under visible light, whereas MTNF devices without Au nanoparticles did not. Moreover, Coulomb oscillations were observed at 4.2 K in MTNF-Au devices, indicating that Au nanoparticles embedded in MTNF-Au played a role of Coulomb islands. These results suggested that the enhanced photoconductance was ascribed to electron tunneling of hot electrons generated by the surface plasmon resonance.",
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Surface plasmon enhanced photoconductance and single electron effects in mesoporous titania nanofibers loaded with gold nanoparticles. / Son, Min Soo; Im, Ji Eun; Wang, Kang Kyun; Oh, Seung Lim; Kim, Yong Rok; Yoo, Kyung Hwa.

In: Applied Physics Letters, Vol. 96, No. 2, 023115, 25.01.2010.

Research output: Contribution to journalArticle

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AU - Son, Min Soo

AU - Im, Ji Eun

AU - Wang, Kang Kyun

AU - Oh, Seung Lim

AU - Kim, Yong Rok

AU - Yoo, Kyung Hwa

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AB - We have synthesized mesoporous TiO2 nanofibers loaded with Au nanoparticles (MTNF-Au) and fabricated single nanofiber-based devices. MTNF-Au devices exhibited surface plasmon enhanced photoconductance under visible light, whereas MTNF devices without Au nanoparticles did not. Moreover, Coulomb oscillations were observed at 4.2 K in MTNF-Au devices, indicating that Au nanoparticles embedded in MTNF-Au played a role of Coulomb islands. These results suggested that the enhanced photoconductance was ascribed to electron tunneling of hot electrons generated by the surface plasmon resonance.

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