Inside Cover: Writing Self-Erasing Images using Metastable Nanoparticle “Inks” (Angew. Chem. Int. Ed. 38/2009)

✍ Scribed by Rafal Klajn; Paul J. Wesson; Kyle J. M. Bishop; Bartosz A. Grzybowski

• Publisher: John Wiley and Sons
• Year: 2009
• Tongue: English
• Weight: 381 KB
• Volume: 48
• Category: Article
• ISSN: 0044-8249
• DOI: 10.1002/anie.200990197

✦ Synopsis

Light-sensitive inks …

… for self-erasing images are formed from metal nanoparticles (NPs) covered with photoswitchable ligands dispersed in a polymer film, as described by B. A. Grzybowski and co-workers on page 7035 ff. Upon exposure to UV light, the NPs form metastable aggregates; the apparent color corresponds to the degree of aggregation. In the absence of light, the aggregates fall apart and the images gradually self-erase. Multicolor images can be also be created with a single NP ink.