Writing Self‐Erasing Images using Metastable Nanoparticle “Inks”

Mission Impossible: Metal nanoparticles (NPs) coated with photoresponsive ligands are used as “inks” for self‐erasing “paper” whereby light‐induced self‐assembly of the NPs is transduced into local color changes (see picture). Depending on the degree of self‐assembly, multicolor images can be writte...

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Published inAngewandte Chemie International Edition Vol. 48; no. 38; pp. 7035 - 7039
Main Authors Klajn, Rafal, Wesson, Paul J., Bishop, Kyle J. M., Grzybowski, Bartosz A.
Format Journal Article
LanguageEnglish
Published Weinheim WILEY‐VCH Verlag 07.09.2009
Subjects
gold
nanoparticles
photochromism
self‐assembly
silver
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Summary:Mission Impossible: Metal nanoparticles (NPs) coated with photoresponsive ligands are used as “inks” for self‐erasing “paper” whereby light‐induced self‐assembly of the NPs is transduced into local color changes (see picture). Depending on the degree of self‐assembly, multicolor images can be written using only one type of NP ink. Duration of image erasure is regulated by the surface concentration of photoactive groups and can range from seconds to days.
Bibliography:This work was supported by the Alfred P. Sloan Fellowship and the Dreyfus Teacher–Scholar Award (both to B.A.G.). R.K. was supported by the NSF Northwestern MRSEC. K.J.M.B. was supported by the NSF Graduate Fellowship.
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ISSN:1433-7851
1521-3773
DOI:10.1002/anie.200901119