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Contact: Jeffrey I. Zink
zink@chem.ucla.edu
310-825-1001
Wiley-Blackwell
Caption: pH-controllable nanovalves that operate in water have been produced by attaching [2]pseudorotaxanes to the surface of mesoporous silica nanoparticles. The nanovalves are able to contain guest molecules (rhodamine B, red circles) within the nanopores at acidic and neutral pH values but release them on command when the pH value is raised.
Credit: (C) Wiley-VCH 2008
Usage Restrictions: Permission to use with appropriate credit and link to http://dx.doi.org/10.1002/anie.200705211
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