Plasmonic paper substrates for point-of-need applications: Recent developments and fabrication methods

Mekonnen, Menbere Leul; Workie, Yitayal Admassu; Su, Wei‐Nien; Hwang, Bing‐Joe

doi:10.1016/j.snb.2021.130401

Cited by 24 publications

(19 citation statements)

References 104 publications

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“…Aside from reproducibility, which is a common issue in SERS substrates [ 16 ], a more general drawback affecting all paper SERS applications is production throughput. This aspect is an important limiting factor in the commercialization [ 17 ], considering that each protocol can be applied for one of a few applications. These factors have limited a real commercial application of plasmonic papers in the SERS analytical field, although they remain a viable tool at the laboratory scale [ 17 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

“…This aspect is an important limiting factor in the commercialization [ 17 ], considering that each protocol can be applied for one of a few applications. These factors have limited a real commercial application of plasmonic papers in the SERS analytical field, although they remain a viable tool at the laboratory scale [ 17 , 18 ]. For instance, paper-based substrates appear as a perfect choice for the label-free SERS analytical “vocation” that aims to produce a point-of-care technique, with compact and portable instrumentation, allowing fast, user-friendly, and cheap measurements.…”

Section: Introductionmentioning

confidence: 99%

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Label-free Surface Enhanced Raman Scattering (SERS) on Centrifugal Silver Plasmonic Paper (CSPP): A Novel Methodology for Unprocessed Biofluids Sampling and Analysis

et al. 2021

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Label-free SERS is a powerful bio-analytical technique in which molecular fingerprinting is combined with localized surface plasmons (LSPs) on metal surfaces to achieve high sensitivity. Silver and gold colloids are among the most common nanostructured substrates used in SERS, but since protein-rich samples such as serum or plasma can hinder the SERS effect due to protein–substrate interactions, they often require a deproteinization step. Moreover, SERS methods based on metal colloids often suffer from a poor reproducibility. Here, we propose a paper-based SERS sampling method in which unprocessed human serum samples are first soaked on paper strips (0.4 × 2 cm2), and then mixed with colloidal silver nanoparticles by centrifugation to obtain a Centrifugal Silver Plasmonic Paper (CSPP). The CSPP methodology has the potential to become a promising tool in bioanalytical SERS applications: it uses common colloidal substrates but without the need for sample deproteinization, while having a good reproducibility both in terms of overall spectral shape (r > 0.96) and absolute intensity (RSD < 10%). Moreover, this methodology allows SERS analysis more than one month after serum collection on the paper strip, facilitating storage and handling of clinical samples (including shipping from clinical sites to labs).

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Label-free Surface Enhanced Raman Scattering (SERS) on Centrifugal Silver Plasmonic Paper (CSPP): A Novel Methodology for Unprocessed Biofluids Sampling and Analysis

et al. 2021

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“…Among these methods, inkjet-printing, filtration and in situ growth methods could easily and quickly load nanoparticles on the surface of filter paper, but it does not necessarily result in uniform and orderly distribution SERS substrate. 7,27 Garnier's group prepared paper-based 3D SERS substrate by soaking, Au NPs were uniformly adsorbed on paper by van der Waals binding without any retention aid, 28 but this method was difficult to adjust the shape and size of nanoparticles. 29 Moreover, the self-assembly of nanoparticles on the paper surface in soaking will be affected by the charge repulsion force between nanoparticles, resulting in large particle spacing, so it is difficult to form effective “hot spots”.…”

Section: Introductionmentioning

confidence: 99%

Development of Au NPs-decorated filter paper as a SERS platform for the detection of benzidine

Wang

Cao

2021

RSC Adv.

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“… 13 , 24 − 26 However, as discussed above, the hydrophilic nature and porosity of cellulose substrates hampers their applicability with colloidal solutions. 26 Hydrophobic cellulose substrates have been reported to overcome these drawbacks, enabling concentration of NPs in a small area. This strategy results in enhanced sensitivity and reproducibility, being exploited mainly in SERS analysis.…”

mentioning

confidence: 99%

“…This strategy results in enhanced sensitivity and reproducibility, being exploited mainly in SERS analysis. 18 , 26 , 27 In addition, some hydrophobic and super-omniphobic materials have demonstrated their potential usefulness for the development of droplet-based optical assays with enhanced sensitivity due to the increased droplet height (i.e., path length). 28 − 30 In light of the above, cellulose substrates with significant water resistance could be particularly attractive as drop holders for both in-drop enrichment and plasmonic sensing purposes.…”

mentioning

confidence: 99%

Waterproof Cellulose-Based Substrates for In-Drop Plasmonic Colorimetric Sensing of Volatiles: Application to Acid-Labile Sulfide Determination in Waters

et al. 2022

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The present work reports on the assessment of widely available waterproof cellulose-based substrates for the development of sensitive in-drop plasmonic sensing approaches. The applicability of three inexpensive substrates, namely, Whatman 1PS, polyethylene-coated filter paper, and tracing paper, as holders for microvolumes of colloidal solutions was evaluated. Waterproof cellulose-based substrates demonstrated to be highly convenient platforms for analytical purposes, as they enabled in situ generation of volatiles and syringeless drop exposure unlike conventional single-drop microextraction approaches and can behave as sample compartments for smartphone-based colorimetric sensing in an integrated way. Remarkably, large drop volumes (≥20 μL) of colloidal solutions can be employed for enrichment processes when using Whatman 1PS as holder. In addition, the stability and potential applicability of spherical, rod-shaped, and core–shell metallic NPs onto waterproof cellulose-based substrates was evaluated. In particular, Au@AgNPs showed potential for the colorimetric detection of in situ generated H 2 S, I 2 , and Br 2 , whereas AuNRs hold promise for I 2 , Br 2 , and Hg 0 colorimetric sensing. As a proof of concept, a smartphone-based colorimetric assay for determination of acid-labile sulfide in environmental water samples was developed with the proposed approach taking advantage of the ability of Au@AgNPs for H 2 S sensing. The assay showed a limit of detection of 0.46 μM and a repeatability of 4.4% ( N = 8), yielding satisfactory recoveries (91–107%) when applied to the analysis of environmental waters.

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Plasmonic paper substrates for point-of-need applications: Recent developments and fabrication methods

Cited by 24 publications

References 104 publications

Label-free Surface Enhanced Raman Scattering (SERS) on Centrifugal Silver Plasmonic Paper (CSPP): A Novel Methodology for Unprocessed Biofluids Sampling and Analysis

Label-free Surface Enhanced Raman Scattering (SERS) on Centrifugal Silver Plasmonic Paper (CSPP): A Novel Methodology for Unprocessed Biofluids Sampling and Analysis

Development of Au NPs-decorated filter paper as a SERS platform for the detection of benzidine

Waterproof Cellulose-Based Substrates for In-Drop Plasmonic Colorimetric Sensing of Volatiles: Application to Acid-Labile Sulfide Determination in Waters

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