title: SnO2 nanorod arrays: low temperature growth, surface modification and field emission properties.
abstract: SnO(2) nanorod arrays have been deposited on 4 inch SiO(2)/Si and Si wafers and stainless steel substrates by plasma-enhanced chemical vapor deposition without any high temperature treatment or additional catalysis. The SnO(2) nanorods grow up from seed nanocrystals along the [110] preferential direction by a self-catalyzed vapor-solid growth mechanism. The surface of the SnO(2) nanorods was modified by ZnO, Pt and Ni nanocrystals. After surface modification, the field emission properties of the SnO(2) nanorod arrays are improved. The Ni nanocrystal with sharp tips and edges act as additional field emission sites to SnO(2) nanorods and thus the Ni/SnO(2)/SiO(2)/Si outperforms other samples due to the synergistic effects of good conductivity and hierarchical sharp apexes. The field enhancement factor of the Ni/SnO(2)/SiO(2)/Si increased around 3 times while the turn-on field of 8.0 V μm(-1) is about one third of the SnO(2)/SiO(2)/Si device.
authors: School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore. hhuang@ntu.edu.sg
authors: Hui
authors: H
authors: Huang
authors: Chiew Keat
authors: CK
authors: Lim
authors: Man Siu
authors: MS
authors: Tse
authors: Jun
authors: J
authors: Guo
authors: Ooi Kiang
authors: OK
authors: Tan
mesh_terms: D004553:Electric Conductivity; D043942:Nanotubes / Q000737:chemistry* / Q000648:ultrastructure; D009532:Nickel / Q000737:chemistry; D010984:Platinum / Q000737:chemistry; D013499:Surface Properties; D013696:Temperature; D017971:Tin Compounds / Q000737:chemistry*; D015034:Zinc Oxide / Q000737:chemistry
chemical_list: D017971:Tin Compounds; D010984:Platinum; D009532:Nickel; C045358:stannic oxide; D015034:Zinc Oxide