title: Characterization and field emission performance of electrochemically synthesized FeOOH nanowalls.
abstract: We report a direct method for the synthesis of Iron(III) oxyhydroxide (FeOOH) nanowalls using an electrochemical technique at room temperature. The length of the nanowalls can be varied depending on the number of repetitive potentiostatic pulse cycles during the electrochemical process. The samples were characterized by ex-situ techniques such as SEM, XPS, FTIR, and TEM. Field emission performances of these nanowalls are also reported for the first time. The measured turn-on electric field is about 4.8 V/microm, with emission current density of 0.12 mA/cm2 at 7.3 V/microm. This technique provides a simple alternative method for large area synthesis of FeOOH nanowalls.
authors.affiliation: NUS Nanoscience and Nanotechnology Initiative, Block S13, 2 Science Drive 3, Singapore 117542.
authors.forename: Kok Chung
authors.initials: KC
authors.lastname: Chin
authors.forename: Huifang
authors.initials: H
authors.lastname: Cui
authors.forename: Chorng Haur
authors.initials: CH
authors.lastname: Sow
authors.forename: Fwu Shan
authors.initials: FS
authors.lastname: Sheu
authors.forename: Hui
authors.initials: H
authors.lastname: Van Li
authors.forename: Xingyu
authors.initials: X
authors.lastname: Gao
authors.forename: Andrew Thye Shen
authors.initials: AT
authors.lastname: Wee
mesh_terms: D004563:Electrochemistry / Q000379:methods*; D004566:Electrodes; D005290:Ferric Compounds / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission / Q000379:methods; D008956:Models, Chemical; D053758:Nanoparticles / Q000737:chemistry; D049329:Nanostructures / Q000737:chemistry*; D036103:Nanotechnology / Q000379:methods*; D043942:Nanotubes / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared / Q000379:methods; D013499:Surface Properties; D013696:Temperature; D013997:Time Factors
chemical_list: D005290:Ferric Compounds; C021024:ferric hydroxide