Bibikova, O. and Haas, J. and López-Lorente, A. I. and Popov, A. and Kinnunen, M. and Meglinski, I. and Mizaikoff, B., Towards enhanced optical sensor performance: SEIRA and SERS with plasmonic nanostars, Analyst, 2017, 142:6, p. 951-958. https://doi.org/10.1039/C6AN02596J
Towards enhanced optical sensor performance : SEIRA and SERS with plasmonic nanostars
|Author:||Bibikova, O.1,2,3,4; Haas, J.2; López-Lorente, A. I.2;|
1Optoelectronics and Measurement Techniques Research Unit, Faculty of Information Technology and Electrical Engineering, University of Oulu, Oulu 90570, Finland
2Institute of Analytical and Bioanalytical Chemistry, Ulm University, 89081 Ulm, Germany
3Art Photonics GmbH, 12489 Berlin, Germany
4Research-Educational Institute of Optics and Biophotonics, Saratov National Research State University, Saratov 410012, Russian Federation
5Interdisciplinary Laboratory of Biophotonics, Tomsk National Research State University, Tomsk 634050, Russian Federation
6Terahertz Biomedicine Laboratory, ITMO University, St Petersburg 197101, Russian Federation
|Online Access:||PDF Full Text (PDF, 0.8 MB)|
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe2019042913578
Royal Society of Chemistry,
|Publish Date:|| 2019-04-29
We report the preparation and characterization of plasmonic chip-based systems comprising self-assembled gold nanostars at silicon substrates that enable concomitantly enhanced Raman (surface enhanced Raman spectroscopy; SERS) and mid-infrared (surface enhanced infrared reflection or absorption spectroscopy; SEIRA) spectral signatures. The high-aspect-ratio structure of gold nanostars provides an increased number of hot spots at their surface, which results in an electric field enhancement around the nanomaterial. Gold nanostars were immobilized at a silicon substrate via a thin gold layer, and α-ω-dimercapto polyethylene glycol (SH-PEG-SH) linkers. The Raman and IR spectra of crystal violet (CV) revealed a noticeable enhancement of the analyte vibrational signal intensity in SERS and SEIRA studies resulting from the presence of the nanostars. Enhancement factors of 2.5 × 103 and 2.3 × 103 were calculated in SERS considering the CV bands at 1374.9 cm−1 and 1181 cm−1, respectively; for SEIRA, an enhancement factor of 5.36 was achieved considering the CV band at 1585 cm−1.
|Pages:||951 - 958|
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
1182 Biochemistry, cell and molecular biology
This research was supported by the Infotech Oulu Graduate School and International Graduate School in Molecular Medicine Ulm (IGradU) within the program “Tissue Homeostasis: Development, Aging and Regeneration, TissueHome”. The authors want to thank both Prof. M. Valcárcel (Department of Analytical Chemistry, University of Córdoba, Spain), and Prof. M. Lindén (Inorganic Chemistry II, Ulm University) for providing access to the Raman spectrometers used during the present study. A. I. López-Lorente wishes to thank the Alexander von Humboldt Foundation for the award of a Postdoctoral Fellowship at the Institute of Analytical and Bioanalytical Chemistry (University of Ulm, Germany). Partial funding by the Horizon 2020 Framework Program of the European Union within the MSCA RISE Project TROPSENSE is also acknowledged. The academy of Finland (projects 260321 and 290596) and the Government of Russian Federation (grant 074-U01) are also acknowledged.
|Academy of Finland Grant Number:||
260321 (Academy of Finland Funding decision)
290596 (Academy of Finland Funding decision)
© The Royal Society of Chemistry 2017. This is the author's version of the work. It is posted here for your personal use. Not for redistribution. The definitive Version of Record was published in Analyst, https://doi.org/10.1039/c6an02596j.