Cover Picture: UV‐Light‐Induced Swelling and Visible‐Light‐Induced Shrinking of a TiO 2 ‐Containing Redox Gel (Adv. Mater. 9/2007) | Zendy

Tatsuma T. | Zendy; Takada K. | Zendy; Miyazaki T. | Zendy

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Cover Picture: UV‐Light‐Induced Swelling and Visible‐Light‐Induced Shrinking of a TiO 2 ‐Containing Redox Gel (Adv. Mater. 9/2007)

Author(s) -

Tatsuma T.,

Takada K.,

Miyazaki T.

Publication year - 2007

Publication title -

advanced materials

Language(s) - English

Resource type - Reports

SCImago Journal Rank - 10.707

H-Index - 527

eISSN - 1521-4095

pISSN - 0935-9648

DOI - 10.1002/adma.200790032

Subject(s) - materials science , visible spectrum , redox , swelling , photochemistry , polymer , photochromism , blue light , chemical engineering , nanotechnology , optoelectronics , composite material , chemistry , engineering , metallurgy

Polyacrylate gels containing Ag + and TiO 2 nanoparticles are shown to swell under UV light and shrink under visible light in water. In work reported by Tetsu Tatsuma and co‐workers on p. 1249, the TiO 2 absorbs UV light and reduces the Ag + , whereas the deposited Ag absorbs visible light and dissolves itself. These redox reactions change the interactions between the polymer chains and eventually the volume of the gel, as shown on the cover.

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