Evidence of ion transport through surface conduction in alkylsilane-functionalized nanoporous ceramic membranes

Langmuir

Volumn 22, Issue 20, 2006, Pages 8277-8280

  Ku, Anthony Y ^a   Ruud, James A ^a   Early, Thomas A ^a   Corderman, Reed R ^a  

^a GENERAL ELECTRIC COMPANY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

ALUMINUM OXIDE; HYDROCARBON CHAIN; HYDROPHILIC DEFECTIVE; SURFACE CONDUCTION;

ALUMINA; CERAMIC MATERIALS; CRYSTAL DEFECTS; ELECTRIC RESISTANCE; HYDROPHILICITY; POROUS MATERIALS; SURFACE PHENOMENA;

NANOSTRUCTURED MATERIALS;

EID: 33749631574     PISSN: 07437463     EISSN: None     Source Type: Journal    
DOI: 10.1021/la0615591     Document Type: Article

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15. A pore must be hydrophilically defective along its entire length in order to accommodate ion transport or electrodeposition. Because of the need to ensure good electrical contact for electrodeposition, the AAO used for the Pt deposition experiments was much thinner (1.3 μm) than the AAO used for impedance measurements (60 μm). Because the alkylsilane structure in longer pores would be less likely to be hydrophilically defective along its the entire length than a shorter pore, the defect rates measured from the Pt electrodeposition experiments represent upper limits. Because the resistance varies inversely with the defect rate, the estimated resistances are lower bounds.