Surface-Enhanced Infrared Absorption Using Individual Cross Antennas Tailored to Chemical Moieties
The development of antenna structures for surface-enhanced infrared absorption spectroscopy (SEIRA) is a topic of intense and growing interest for extending IR spectroscopy to zeptomolar quantities and ultimately to the single-molecule level. Here we show that strong infrared spectroscopic enhanceme...
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| Veröffentlicht in: | Journal of the American Chemical Society 2013-03, Vol.135 (9), p.3688-3695 |
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| container_end_page | 3695 |
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| container_issue | 9 |
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| container_title | Journal of the American Chemical Society |
| container_volume | 135 |
| creator | Brown, Lisa V Zhao, Ke King, Nicholas Sobhani, Heidar Nordlander, Peter Halas, Naomi J |
| description | The development of antenna structures for surface-enhanced infrared absorption spectroscopy (SEIRA) is a topic of intense and growing interest for extending IR spectroscopy to zeptomolar quantities and ultimately to the single-molecule level. Here we show that strong infrared spectroscopic enhancements can be obtained from individual gold nanoantennas using conventional IR spectrometric sources. The antenna structure dimensions can be tuned to enhance the IR modes of specific chemical moieties. Simulations of the electric field intensity in the antenna junction region reveal a maximum SEIRA enhancement factor of more than 12 000. These findings open new opportunities for analyzing IR vibrations of exceptionally small quantities of molecules using widely accessible light sources. |
| doi_str_mv | 10.1021/ja312694g |
| format | Article |
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| source | MEDLINE; American Chemical Society Journals |
| subjects | Gold - chemistry Metal Nanoparticles - chemistry Spectrophotometry, Infrared Surface Properties |
| title | Surface-Enhanced Infrared Absorption Using Individual Cross Antennas Tailored to Chemical Moieties |
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