Single molecule atomic force microscopy studies of photosensitized singlet oxygen behavior on a DNA origami template
DNA origami, the folding of a long single-stranded DNA sequence (scaffold strand) by hundreds of short synthetic oligonucleotides (staple strands) into parallel aligned helices, is a highly efficient method to form advanced self-assembled DNA-architectures. Since molecules and various materials can...
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| Main Authors: | , , , , , , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
28 December 2010
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| In: |
ACS nano
Year: 2010, Volume: 4, Issue: 12, Pages: 7475-7480 |
| ISSN: | 1936-086X |
| DOI: | 10.1021/nn102701f |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1021/nn102701f
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| Author Notes: | Sarah Helmig, Alexandru Rotaru, Dumitru Arian, Larisa Kovbasyuk, Jacob Arnbjerg, Peter R. Ogilby, Jørgen Kjems, Andriy Mokhir, Flemming Besenbacher, and Kurt V. Gothelf |
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| 520 | |a DNA origami, the folding of a long single-stranded DNA sequence (scaffold strand) by hundreds of short synthetic oligonucleotides (staple strands) into parallel aligned helices, is a highly efficient method to form advanced self-assembled DNA-architectures. Since molecules and various materials can be conjugated to each of the short staple strands, the origami method offers a unique possibility of arranging molecules and materials in well-defined positions on a structured surface. Here we combine the action of light with AFM and DNA nanostructures to study the production of singlet oxygen from a single photosensitizer molecule conjugated to a selected DNA origami staple strand on an origami structure. We demonstrate a distance-dependent oxidation of organic moieties incorporated in specific positions on DNA origami by singlet oxygen produced from a single photosensitizer located at the center of each origami. | ||
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