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| Content Provider | PubMed Central |
|---|---|
| Author | Asiala, Steven M. Schultz, Zachary D. |
| Abstract | Vapor deposition of silver and gold onto a porous anodized aluminum oxide template is shown to produce a SERS substrate with an average surface enhancement factor of 107 – 108. The high level of enhancement is explored using a combination of dark-field Rayleigh scattering and Raman spectroscopy and imaging. The scattering spectrum of the surface indicates a Plasmon resonance at 633 nm and dark-field imaging shows a relatively uniform scattering intensity at this wavelength. These measurements are consistent with the uniform enhanced Raman intensity observed in Raman maps of the substrate. Scanning electron microscopy shows the surface exhibits heterogeneous nanostructures with diameters of approximately 100 nm, the size of the pores in the template. Our measurements indicate that interactions between adjacent structures forming junctions and crevices likely give rise to a high density of hotspots, which provide the extraordinary SERS enhancement. The advantage of substrates prepared in this way is the reproducibly dense distribution of hotspots across the surface, increasing the likelihood that an analyte will experience the largest enhancement. |
| Related Links | http://dx.doi.org/10.1039/c1an15432j |
| Starting Page | 4472 |
| File Format | |
| ISSN | 00032654 |
| e-ISSN | 13645528 |
| Journal | The Analyst |
| Issue Number | 21 |
| Volume Number | 136 |
| Language | English |
| Publisher Date | 2011-01-01 |
| Access Restriction | Open |
| Subject Keyword | Analytical Chemistry Spectroscopy Electrochemistry Biochemistry Environmental Chemistry Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Spectroscopy Environmental Chemistry Analytical Chemistry Biochemistry Electrochemistry |
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