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231223s2006 xx ||||| 00| ||eng c |
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|a (DE-627)NLM16660707X
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|a (NLM)17107001
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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|a Saruwatari, Kazuko
|e verfasserin
|4 aut
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|a Humidity-sensitive electrical conductivity of a Langmuir-Blodgett film of titania nanosheets
|b surface modification as induced by light irradiation under humid conditions
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|c 2006
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|a Text
|b txt
|2 rdacontent
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|a ohne Hilfsmittel zu benutzen
|b n
|2 rdamedia
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|a Band
|b nc
|2 rdacarrier
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|a Date Completed 13.03.2007
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|a Date Revised 19.11.2006
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|a published: Print
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|a Citation Status PubMed-not-MEDLINE
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|a Electrical conductivity of titania nanosheets was investigated for a single-layered Langmuir-Blodgett (LB) film deposited onto a comb-type electrode (5 or 10 microm (electrode spacing) x 8 mm (electrode width)). The photoresponsive electrical properties of the film were investigated by irradiating with a Xe lamp under various atmospheric conditions. The atmosphere was controlled by introducing either oxygen or nitrogen gases containing different amounts of water vapor. As a result, the LB film behaved as an insulator with little photoresponse under dry atmospheric conditions. It became conductive on illuminating with a Xe lamp under a wet oxygen atmosphere. Conductivity increased with the increase of irradiation time (0-30 min) to attain a stationary value in 1 h. The highest conductive state thus attained lasted for several hours in the dark. The impedance of the film was measured over the frequency range of 1 MHz to 50 Hz by varying the relative humidity of an atmosphere from 0 to 100%. The results were analyzed by assuming an equivalent circuit consisting of one resistance (R) with constant Warburg component (W) and one capacitance (C) in parallel. The R component depended remarkably on the relative humidity, while the C component stayed nearly at the constant value. The dependence of R on water vapor (PH2O) was expressed by R = A[PH2O]n with A = constant and n = -2.9. The results were rationalized in terms of the surface modification of titania nanosheets to hydrophilic nature under the illumination of UV light
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|a Journal Article
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|a Sato, Hisako
|e verfasserin
|4 aut
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|a Kogure, Toshihiro
|e verfasserin
|4 aut
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|a Wakayama, Takayuki
|e verfasserin
|4 aut
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|a Iitake, Masanori
|e verfasserin
|4 aut
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|a Akatsuka, Kosho
|e verfasserin
|4 aut
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|a Haga, Masaaki
|e verfasserin
|4 aut
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|a Sasaki, Takayoshi
|e verfasserin
|4 aut
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|a Yamagishi, Akihiko
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 22(2006), 24 vom: 21. Nov., Seite 10066-71
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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| 773 |
1 |
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|g volume:22
|g year:2006
|g number:24
|g day:21
|g month:11
|g pages:10066-71
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|d 22
|j 2006
|e 24
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|c 11
|h 10066-71
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