DNA origami based Au–Ag-core–shell nanoparticle dimers with single-molecule SERS sensitivity
- DNA origami nanostructures are a versatile tool to arrange metal nanostructures and other chemical entities with nanometer precision. In this way gold nanoparticle dimers with defined distance can be constructed, which can be exploited as novel substrates for surface enhanced Raman scattering (SERS). We have optimized the size, composition and arrangement of Au/Ag nanoparticles to create intense SERS hot spots, with Raman enhancement up to 1010, which is sufficient to detect single molecules by Raman scattering. This is demonstrated using single dye molecules (TAMRA and Cy3) placed into the center of the nanoparticle dimers. In conjunction with the DNA origami nanostructures novel SERS substrates are created, which can in the future be applied to the SERS analysis of more complex biomolecular targets, whose position and conformation within the SERS hot spot can be precisely controlled.
Author details: | Julia PrinzORCiDGND, Christian HeckORCiDGND, Lisa Ellerik, Virginia Merk, Ilko BaldORCiDGND |
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URN: | urn:nbn:de:kobv:517-opus4-89714 |
Publication series (Volume number): | Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe (221) |
Publication type: | Postprint |
Language: | English |
Date of first publication: | 2016/02/11 |
Publication year: | 2016 |
Publishing institution: | Universität Potsdam |
Release date: | 2016/04/12 |
First page: | 5612 |
Last Page: | 5620 |
Source: | Nanoscale (2016) Nr. 8, S. 5612-5620. DOI: 10.1039/C5NR08674D |
Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Chemie |
DDC classification: | 5 Naturwissenschaften und Mathematik / 54 Chemie / 540 Chemie und zugeordnete Wissenschaften |
Peer review: | Referiert |
Publishing method: | Open Access |
License (English): | Creative Commons - Namensnennung 3.0 Unported |
External remark: | Bibliographieeintrag der Originalveröffentlichung/Quelle |