title: Morphological and SERS Properties of Silver Nanorod Array Films Fabricated by Oblique Thermal Evaporation at Various Substrate Temperatures.
abstract: Aligned silver nanorod (AgNR) array films were fabricated by oblique thermal evaporation. The substrate temperature during evaporation was varied from 10 to 100 °C using a home-built water cooling system. Deposition angle and substrate temperature were found to be the most important parameters for the morphology of fabricated films. Especially, it was found that there exists a critical temperature at ~90 °C for the formation of the AgNR array. The highest enhancement factor of the surface-enhanced Raman scattering (SERS), observed in the Ag films coated with benzenethiol monolayer, was ~6 × 10(7). Hot spots, excited in narrow gaps between nanorods, were attributed to the huge enhancement factor by our finite-difference time-domain (FDTD) simulation reflecting the real morphology.
authors.affiliation: Advanced Photonics Research Institute (APRI), Gwangju Institute of Science and Technology (GIST), Gwangju, 500-712, South Korea, omkyu@gist.ac.kr.
authors.forename: Myoung-Kyu
authors.initials: MK
authors.lastname: Oh
authors.forename: Yong-Seok
authors.initials: YS
authors.lastname: Shin
authors.forename: Chang-Lyoul
authors.initials: CL
authors.lastname: Lee
authors.forename: Ranjit
authors.initials: R
authors.lastname: De
authors.forename: Hoonsoo
authors.initials: H
authors.lastname: Kang
authors.forename: Nan Ei
authors.initials: NE
authors.lastname: Yu
authors.forename: Bok Hyeon
authors.initials: BH
authors.lastname: Kim
authors.forename: Joon Heon
authors.initials: JH
authors.lastname: Kim
authors.forename: Jin-Kyu
authors.initials: JK
authors.lastname: Yang