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231223s2007 xx ||||| 00| ||eng c |
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|a (NLM)18027976
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|a DE-627
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|c DE-627
|e rakwb
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|a eng
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|a Dattilo, Davide
|e verfasserin
|4 aut
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|a Wetting properties of flat and porous silicon surfaces coated with a spiropyran
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|c 2007
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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 Date Completed 28.01.2008
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|a Date Revised 21.11.2013
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a We report the immobilization and characterization of a spiropyran (SP) derivative (1) on smooth Si(100) and porous H-terminated silicon surfaces through a thermal hydrosilylation protocol. Under visible light exposure the SP is in a closed, hydrophobic form, whereas under UV irradiation it converts to a polar, hydrophilic open form named merocyanine (MC). The SP-MC photoinduced isomerization gives a small contact angle (CA) change of 9 degrees for smooth Si(100) samples under sequential irradiation cycles with white and UV light. Irradiation of porous silicon (PS) surfaces, under the same conditions, gave a CA change of 11 degrees. Treatment of PS surfaces, bearing the MC form of chromophore 1, with cobalt(II) ions enhances the wettability switching of the PS surface to a much larger extent, giving rise to a CA variation as high as 32 degrees
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Benzopyrans
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|a Indoles
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|a Nitro Compounds
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|a spiropyran
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|a Silicon
|2 NLM
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|a Z4152N8IUI
|2 NLM
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|a Armelao, Lidia
|e verfasserin
|4 aut
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|a Fois, Giovanni
|e verfasserin
|4 aut
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|a Mistura, Giampaolo
|e verfasserin
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|a Maggini, Michele
|e verfasserin
|4 aut
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 23(2007), 26 vom: 18. Dez., Seite 12945-50
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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| 773 |
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|g volume:23
|g year:2007
|g number:26
|g day:18
|g month:12
|g pages:12945-50
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