Short-wave infrared excited SERS

Lynn, Kirstin A.; McNay, Graeme; Eustace, David; Shand, Neil C.; Smith, W. Ewen

doi:10.1039/c0an00096e

Cited by 10 publications

(17 citation statements)

References 3 publications

(3 reference statements)

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“… 14 The enhancement obtained from SERS is related to the frequency of the surface plasmon excited on the metal rather than the 4th power law. 16 Therefore, to make SERS a viable method at 1280 nm, the surface plasmon resonance (SPR) should have some resonance with the NIR excitation source. The SERS spectrum of dye 14 is shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Extreme red shifted SERS nanotags

et al. 2015

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Section: Resultsmentioning

confidence: 99%

Extreme red shifted SERS nanotags

et al. 2015

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“…In the case of the melamine concentration study, successive dilutions were performed to 1 µg/mL (1 ppm). Approximately 0.5 mL samples were introduced into the SERS‐active vials (model Simple SERS Sample Vials, Real‐Time Analyzers, Middletown, CT) via pipette. The vials were immediately capped and used.…”

Section: Methodsmentioning

confidence: 99%

“…[27] We are aware of only two publications that have explored laser excitation beyond 1064 nm. [31,32] Here, we present SERS of a number of chemicals representative of future field applications (see supplementary material), with a focus on melamine, a food contaminant that led to recalls of both pet and human foods, [33] using 785, 1064, and 1550 nm excitation. The same metaldoped sol-gels were used for all measurements, which have previously been shown to be active using excitation from 532 to 1064 nm.…”

Section: Introductionmentioning

confidence: 99%

Surface‐enhanced Raman spectra of melamine and other chemicals using a 1550 nm (retina‐safe) laser

Huang

Shende

Sengupta

et al. 2011

J Raman Spectroscopy

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Many trace chemical analyses are being transitioned from the lab to the field, among which is surface‐enhanced Raman spectroscopy. Although initial portable Raman analyzers primarily employ 785 nm laser excitation, recent studies suggest longer wavelengths, with an appropriate surface‐enhanced Raman‐active substrate, may provide equal sensitivity. Furthermore, 1550 nm excitation may provide added safety for the user, in that permanent retina damage does not occur. Here, we show that a reasonable enhancement factor can be obtained for melamine using 1550 nm laser excitation that is nearly equivalent to those obtained using 785 and 1064 nm laser excitation. We also demonstrate that a number of other chemicals of interest can be measured by 1550 nm surface‐enhanced Raman scattering, albeit only modest sensitivity is achieved because of instrument limitations, not enhancement factors. Copyright © 2011 John Wiley & Sons, Ltd.

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“…[6][7][8][9] To exploit this, there is a great need to design SERS nanotags, which give reproducible response, can provide strong enhancements and, in particular, are optically active in the IR region. Following initial studies, 3,11 HGNs and 100 nm AuNPs were modified with dye 1 and their ability as 1550 nm SERS nanotags investigated. Figure S1, ESI, shows that the 100 nm AuNPs make for better SERS substrates with a 4-fold increase in SERS intensity over the HGNs being observed.…”

mentioning

confidence: 99%

“…Hence it can be intense well into the infrared. [1][2][3] SERS nanotags are in situ probes which consist of metallic nanoparticles and Raman reporters. They provide extremely sensitive and selective analytical tools for studying chemical and biological systems.…”

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confidence: 99%

Sensitive SERS nanotags for use with 1550 nm (retina-safe) laser excitation

Kearns

Bedics

Shand

et al. 2016

Analyst

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This version is available at https://strathprints.strath.ac.uk/55414/ Strathprints is designed to allow users to access the research output of the University of Strathclyde. Unless otherwise explicitly stated on the manuscript, Copyright © and Moral Rights for the papers on this site are retained by the individual authors and/or other copyright owners. Please check the manuscript for details of any other licences that may have been applied. You may not engage in further distribution of the material for any profitmaking activities or any commercial gain. You may freely distribute both the url (https://strathprints.strath.ac.uk/) and the content of this paper for research or private study, educational, or not-for-profit purposes without prior permission or charge.Any correspondence concerning this service should be sent to the Strathprints administrator: strathprints@strath.ac.ukThe Strathprints institutional repository (https://strathprints.strath.ac.uk) is a digital archive of University of Strathclyde research outputs. It has been developed to disseminate open access research outputs, expose data about those outputs, and enable the management and persistent access to Strathclyde's intellectual output. Raman scattering provides good molecular specificity however, it is dependent on the 4 th power of the excitation frequency, thus scattering is weak when infrared (IR) excitation is used. Sensitive SERS Nanotags for Use with 1550 nm (Retina-Safe) Laser Excitation

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Short-wave infrared excited SERS

Abstract: Optimisation of colloidal properties allows Surface Enhanced Raman Scattering (SERS) to be recorded from a range of analytes at 1546 nm, demonstrating the potential of SERS for use in a wavelength region of particular value for applications such as homeland security.

Cited by 10 publications

References 3 publications

Extreme red shifted SERS nanotags

Extreme red shifted SERS nanotags

Surface‐enhanced Raman spectra of melamine and other chemicals using a 1550 nm (retina‐safe) laser

Sensitive SERS nanotags for use with 1550 nm (retina-safe) laser excitation

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