Recycling of surface-enhanced Raman substrates by ultraviolet cleaning

Sadate, Sandra; Calzzani, Fernando; Kassu, Aschalew; Sharma, Anup; Ruffin, Paul; Brantley, Christina; Edwards, Eugene

doi:10.1117/1.3491201

Cited by 5 publications

(3 citation statements)

References 14 publications

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“…We do not claim that the demonstrated reusability is the exclusive property of our pattern design. We are, however, not aware of such a clear demonstration of the reusability for other nanostructured SERS pattern, such as the commercial Klarite pattern …”

Section: Resultsmentioning

confidence: 99%

“…Subsequently, one could identify and separate fundamental parameters such as the chemical enhancement from a systematic study of different adsorbed species and physical surroundings using the SAME substrate. Of course, this approach requires an effective cleaning procedure and robust substrates, so that the substrate sensitivity is not altered during repeated cycles of use . Substrate reusability has previously been reported with the use of random particle‐based or self‐ordered array substrates and protective oxide layers that can prevent metal contamination and also strongly reduce the enhancement factor.…”

Section: Introductionmentioning

confidence: 99%

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Reusable plasmonic substrates fabricated by interference lithography: a platform for systematic sensing studies

Siegfried

Kind

Terfort

et al. 2012

J Raman Spectroscopy

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Surface-enhanced Raman scattering (SERS) has become increasingly popular in the scientific and industrial communities because of its analytical capabilities and potential to study fundamentals in plasmonics. Although under certain conditions extremely high sensitivity is possible, the practical use of SERS is frequently limited by instability and poor reproducibility of the enhancement factor. For analytical applications or for comparative measurements to enable the distinction between electromagnetic and chemical enhancement, the development of standardized and recyclable SERS substrates, having uniform and persistent performance, is proposed. To this end, we have fabricated periodic nanoslit arrays using extreme ultraviolet lithography that provide average large (2*10 6 ) and homogeneous SERS enhancement factors with a spot-to-spot variability of less than 3%. In addition, they are reusable without any degradation or loss of enhancement. The fabrication of such arrays consists of two steps only, lithographic patterning followed by metal evaporation. Both processes may be performed over areas of several square mm on any planar substrate. The sensor capabilities were demonstrated by substrates with monomolecular films of several different thiols. The concept of reusable SERS substrates may open a powerful platform within an analytical tool and in particular for systematic SERS studies for the investigation of fundamental parameters such as chemical enhancement, surface selection rules, and molecular alignment.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Reusable plasmonic substrates fabricated by interference lithography: a platform for systematic sensing studies

Siegfried

Kind

Terfort

et al. 2012

J Raman Spectroscopy

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“…[23] The stability of these SERS substrates significantly improves upon those that are quickly damaged when exposed to cleaning protocols such as ultraviolet irradiation or other gas plasmas. [25,41,42] We note that even where literature claims SERS substrates to be reusable, [43,44] no thorough statistical analysis is quantified to indicate their performance. Reusability is often claimed by employing dye molecules, such as rhodamine 6G or malachite green, which inherently have large Raman cross-sections.…”

Section: Resultsmentioning

confidence: 99%

SERS Sensing of Dopamine with Fe(III)‐Sensitized Nanogaps in Recleanable AuNP Monolayer Films

Niihori,

Földes,

Readman

et al. 2023

Small

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Sensing of neurotransmitters (NTs) down to nm concentrations is demonstrated by utilizing self‐assembled monolayers of plasmonic 60 nm Au nanoparticles in close‐packed arrays immobilized onto glass substrates. Multiplicative surface‐enhanced Raman spectroscopy enhancements are achieved by integrating Fe(III) sensitizers into the precisely‐defined <1 nm nanogaps, to target dopamine (DA) sensing. The transparent glass substrates allow for efficient access from both sides of the monolayer aggregate films by fluid and light, allowing repeated sensing in different analytes. Repeated reusability after analyte sensing is shown through oxygen plasma cleaning protocols, which restore pristine conditions for the nanogaps. Examining binding competition in multiplexed sensing of two catecholamine NTs, DA and epinephrine, reveals their bidentate binding and their interactions. These systems are promising for widespread microfluidic integration enabling a wide range of continuous biofluid monitoring for applications in precision health.

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Nanostrucured substrates for surface-enhanced Raman scattering spectroscopy

Bonifacio

2020

Nanomaterials for Theranostics and Tissue Engineering

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Recycling of surface-enhanced Raman substrates by ultraviolet cleaning

Cited by 5 publications

References 14 publications

Reusable plasmonic substrates fabricated by interference lithography: a platform for systematic sensing studies

Reusable plasmonic substrates fabricated by interference lithography: a platform for systematic sensing studies

SERS Sensing of Dopamine with Fe(III)‐Sensitized Nanogaps in Recleanable AuNP Monolayer Films

Nanostrucured substrates for surface-enhanced Raman scattering spectroscopy

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