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Au Nanowire-on-Film SERRS Sensor for Ultrasensitive Hg2+ Detection
- Authors
- Kang, Taejoon; Yoo, Seung Min; Yoon, Ilsun; Lee, Sangyeop; Choo, Jaebum; Lee, Sang Yup; Kim, Bongsoo
- Issue Date
- Feb-2011
- Publisher
- WILEY-V C H VERLAG GMBH
- Keywords
- DNA; gold; mercury; nanowires; surface-enhanced Raman scattering
- Citation
- CHEMISTRY-A EUROPEAN JOURNAL, v.17, no.7, pp 2211 - 2214
- Pages
- 4
- Journal Title
- CHEMISTRY-A EUROPEAN JOURNAL
- Volume
- 17
- Number
- 7
- Start Page
- 2211
- End Page
- 2214
- ISSN
- 0947-6539
1521-3765
- Abstract
- We report an ultrasensitive and selective single nanowire-on-film (SNOF) surface-enhanced resonance Raman scattering (SERRS) sensor for Hg2+ detection based on structure-switching double stranded DNAs (dsDNAs). Binding of Hg2+ induces conformational changes of the dsDNAs and let a Raman reporter get close to the SNOF structure, thereby turning on SERRS signal. The well-defined SNOF structure provides a detection limit of 100 pm with improved accuracy in Hg2+ detection. This sensor is stable over a considerable amount of time and reusable after simple treatment. Since this SNOF sensor is composed of a single Au NW on a film, development of a multiplex sensor would be possible by employing NWs modified by multiple kinds of aptamers.
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