Templated silver nanocube arrays for single-molecule SERS detection
- We describe the self-assembly of silver nanocubes (AgNC) into dense bowl-shaped arrays using a template made from polystyrene nanospheres (PSNS). Interestingly, we found that most AgNCs were arranged facet-to-facet. When used as substrates for surface-enhanced Raman scattering (SERS), we observed that the SERS hot spot positions were located at the corners of the cubes. This was confirmed using the formation of a self-assembled monolayer (SAM) of 1-dodecanethiol (DDT) covering the cubes' facet surface, whilst the pinholes in the DDT SAM at the corners were subsequently filled with 2-mercaptopyridine (MPy). Due to the high enhancement from the densely arranged AgNCs, single molecule detection was achieved from this SERS substrate and evidenced using the bi-analyte Raman technique.
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| Document Type: | Article |
|---|---|
| Author: | Cheng Fang, Daniel Brodoceanu, Tobias KrausORCiD, Nicolas H. VoelckerORCiD |
| URN: | urn:nbn:de:bsz:291:415-2518 |
| DOI: | https://doi.org/10.1039/C3RA22457K |
| Parent Title (English): | RSC Advances |
| Volume: | 3 |
| Issue: | 13 |
| First Page: | 4288 |
| Last Page: | 4293 |
| Language: | English |
| Year of first Publication: | 2013 |
| Release Date: | 2022/11/09 |
| Scientific Units: | Structure Formation |
| DDC classes: | 500 Naturwissenschaften und Mathematik / 540 Chemie |
| Open Access: | Open Access |
| Signature: | INM 2013/19 |
| Licence (German): |  Urheberrechtlich geschützt |
