title: Gold nanoparticle-modulated conductivity in gold peapodded silica nanowires.
abstract: We report the enhanced electrical conductivity properties of single gold-peapodded amorphous silica nanowires synthesized using microwave plasma enhanced chemical vapor deposition. Dark conductivity of the gold-peapodded silica nanowires can be adjusted by controlling the number of incorporated metal nanoparticles. The temperature-dependent conductivity measurement reveals that the band tail hopping mechanism dominates the electron transport in the gold-peapodded silica nanowires. The high conductivity in the nano-peapodded nanowires with more embedded gold-nanoparticles can be explained by the higher density of hopping states and shorter hopping distance. These Au-embedded amorphous silica nanowires have provided a new approach to enhance not only the electron conduction, but also the chemical-sensor response/sensitivity.
authors.affiliation: Institute of Microelectronics & Department of Electrical Engineering, Center for Micro/Nano Science and Technology, Advanced Optoelectronic Technology Center, National Cheng Kung University, Tainan, Taiwan.
authors.forename: Sheng-Bo
authors.initials: SB
authors.lastname: Wang
authors.forename: Ming-Shien
authors.initials: MS
authors.lastname: Hu
authors.forename: Shoou Jinn
authors.initials: SJ
authors.lastname: Chang
authors.forename: Cheong-Wei
authors.initials: CW
authors.lastname: Chong
authors.forename: Hsieh-Cheng
authors.initials: HC
authors.lastname: Han
authors.forename: Bohr-Ran
authors.initials: BR
authors.lastname: Huang
authors.forename: Li-Chyong
authors.initials: LC
authors.lastname: Chen
authors.forename: Kuei-Hsien
authors.initials: KH
authors.lastname: Chen
mesh_terms: D004553:Electric Conductivity; D006046:Gold / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D053770:Nanowires / Q000737:chemistry*; D012666:Semiconductors; D012822:Silicon Dioxide / Q000737:chemistry*; D013696:Temperature
chemical_list: D006046:Gold; D012822:Silicon Dioxide