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.
Bibliographical noteFunding Information:
This work has been financially supported by National Research Foundation of Korea through National Core Research Center for Nanomedical Technology (Grant No. R15-20040924-00000-0) and a grant from the Korea Healthcare technology R&D Project, Ministry for Health, Welfare & Family Affairs, Republic of Korea (Grant No. A085136). J.E.I., K.K.W., and S.L.O. acknowledge the fellowship of the BK 21 program from the Ministry of Education and Human Resources Development.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)