Characterization and field emission performance of electrochemically synthesized FeOOH nanowalls.
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.
Chin
Kok Chung
KC
NUS Nanoscience and Nanotechnology Initiative, Block S13, 2 Science Drive 3, Singapore 117542.
Cui
Huifang
H
Sow
Chorng Haur
CH
Sheu
Fwu Shan
FS
Van Li
Hui
H
Gao
Xingyu
X
Wee
Andrew Thye Shen
AT
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
D005290:Ferric Compounds; C021024:ferric hydroxide