Photocontrolled Dopamine Polymerization on DNA Origami with Nanometer Resolution. Issue 15 (27th December 2019)

• Record Type: Journal Article
• Authors: Winterwerber, Pia; Harvey, Sean; Ng, David Y. W.; Weil, Tanja
• Is Part Of: Angewandte Chemie international edition. Volume 59:Issue 15(2020)
• Page Start: 6144
• Page End: 6149
• Publication Date: 2019-12-27
• Subjects: DNA nanotubes -- DNA origami -- photopolymerization -- polydopamine -- stability in water; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.201911249
• Languages: English
• ISSNs: 1433-7851

Abstract

Abstract: Temporal and spatial control over polydopamine formation on the nanoscale can be achieved by installing an irradiation‐sensitive polymerization system on DNA origami. Precisely distributed G‐quadruplex structures on the DNA template serve as anchors for embedding the photosensitizer protoporphyrin IX, which—upon irradiation with visible light—induces the multistep oxidation of dopamine to polydopamine, producing polymeric structures on designated areas within the origami framework. The photochemical polymerization process allows exclusive control over polydopamine layer formation through the simple on/off switching of the light source. The obtained polymer–DNA hybrid material shows significantly enhanced stability, paving the way for biomedical and chemical applications that are typically not possible owing to the sensitivity of DNA. Abstract : When dopamine is photopolymerized on DNA origami, precisely patterned nanoobjects are obtained with unprecedented spatiotemporal control and nanometer resolution. This approach combines the advantages of visible light as an external stimulus and the unique addressability of the DNA origami methodology.