A simple method of growing endotaxial silver nanostructures on silicon for applications in surface enhanced Raman scattering (SERS)

Roy, Abhijit Sinha; Chini, Tapas Kumar; Satpati, Biswarup

doi:10.1016/j.apsusc.2019.144225

Cited by 15 publications

(13 citation statements)

References 59 publications

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“…Electroless deposition is an alternative process to pattern films using solution‐based processes, which has made it attractive for applications in surface‐enhanced Raman scattering, catalysis, and stretchable electronics, microstructures electrodes, among others. [ 14–21 ] Although this process is amenable to the deposition of a variety of thin films, including metals, semiconductors, and even insulators, on a range of substrates, [ 22 ] its most common use is for the deposition of noble metal films. The electroless deposition method is simple, low cost, avoids the use of toxic solvents, and allows the conformal coating of three‐dimensional structures, which is not possible with other methods like sputtering or vapor deposition.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of microstructured electrodes via electroless metal deposition onto polydopamine‐coated polystyrene substrates and thermal shrinking

et al. 2021

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The ability to provide high sensitivity with small footprints makes miniaturized electrodes key components of biosensing, wearable electronics and lab-ona-chip devices. Recently, thin film deposition onto polystyrene films, followed by thermal shrinking has been used to produce microstructured electrodes (MSEs) with high electroactive surface area (ESA). Nevertheless, the high cost associated with film deposition through evaporation used in microfabrication and the variability in performance of screen-printed electrodes (SPEs) remain key barriers that limit their widespread deployment. Here, a simple and inexpensive method is developed for the solution-based patterning of high-quality metallic films on polystyrene substrates for MSE fabrication. The ESA of electrodes produced through this method is 2 × and 12 × larger than that of microstructured and planar electrodes produced through sputtering, respectively, and their cost is only 20% of sputtered ones. This methodology allows the fabrication of on-chip microstructured electrochemical cells (SMECs) with excellent analytical performance (3% RSD inter-day reproducibility and 0.3% RSD repeatability), superior to that of commercially available SPEs. In addition, the ESA of SMECs is significantly higher than that of SPEs, and they show excellent response toward dopamine detection. We anticipate that this solution-based fabrication approach will expedite the development of miniaturized sensing platforms for point-ofcare applications.

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Section: Introductionmentioning

confidence: 99%

Fabrication of microstructured electrodes via electroless metal deposition onto polydopamine‐coated polystyrene substrates and thermal shrinking

et al. 2021

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“…The enhancement effect of the SERS material may be evaluated in terms of EF, which can be calculated as follows [41][42][43]:…”

Section: Sers Enhancement Factor Calculationmentioning

confidence: 99%

Effect of the Duty Cycle of Flower-like Silver Nanostructures Fabricated with a Lyotropic Liquid Crystal on the SERS Spectrum

et al. 2021

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Surface-enhanced Raman scattering (SERS) has been widely reported to improve the sensitivity of Raman spectra. Ordinarily, the laser is focused on the sample to measure the Raman spectrum. The size of the focused light spot is comparable with that of micro-nano structures, and the number of micro-nano structures contained in the light spot area (defined as duty cycle) will severely affect the spectrum intensity. In this study, flower-like silver nanostructures were fabricated with a soft lyotropic liquid crystal template in order to investigate the effect of duty cycle. They were observed under a scanning electron microscope, and their spectrum enhancement factor was computed with the obtained Raman spectrum. Then, their duty cycles were measured using a SERS substrate at different locations. A formula was derived to represent the relation between the duty cycle of the nanoflowers and the Raman spectral intensity. This work could promote the actual applications of SERS in high-sensitivity spectrum testing.

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“…Now, the most prominent SERS-active substrates employ an effect of the enhanced electric field due to localized surface plasmon resonance (LSPR) in what are called plasmonic metal nanoparticles (NPs) [ 3 , 4 ]. Silver (Ag) and gold (Au) NPs with amazing plasmonic characteristics are usually used to detect low concentrations of biomolecules by SERS [ 13 , 14 , 15 , 16 , 17 ]. While the SERS signal promoted by individual plasmonic NPs is characterized by relatively low intensity and poor reproducibility, which become a major obstacle for practical application and commercialization, the use of specifically designed nanostructured substrates as templates for plasmonic NPs is the main direction for the development of SERS sensing systems for different biomolecules [ 16 ], living cells [ 17 ], and biosystems [ 18 , 19 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

Surface-Enhanced Raman Scattering from Dye Molecules in Silicon Nanowire Structures Decorated by Gold Nanoparticles

Ikramova

Utegulov

Dikhanbayev

et al. 2022

IJMS

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Silicon nanowires (SiNWs) prepared by metal-assisted chemical etching of crystalline silicon wafers followed by deposition of plasmonic gold (Au) nanoparticles (NPs) were explored as templates for surface-enhanced Raman scattering (SERS) from probe molecules of Methylene blue and Rhodamine B. The filling factor by pores (porosity) of SiNW arrays was found to control the SERS efficiency, and the maximal enhancement was observed for the samples with porosity of 55%, which corresponded to dense arrays of SiNWs. The obtained results are discussed in terms of the electromagnetic enhancement of SERS related to the localized surface plasmon resonances in Au-NPs on SiNW’s surfaces accompanied with light scattering in the SiNW arrays. The observed SERS effect combined with the high stability of Au-NPs, scalability, and relatively simple preparation method are promising for the application of SiNW:Au-NP hybrid nanostructures as templates in molecular sensorics.

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A simple method of growing endotaxial silver nanostructures on silicon for applications in surface enhanced Raman scattering (SERS)

Cited by 15 publications

References 59 publications

Fabrication of microstructured electrodes via electroless metal deposition onto polydopamine‐coated polystyrene substrates and thermal shrinking

Fabrication of microstructured electrodes via electroless metal deposition onto polydopamine‐coated polystyrene substrates and thermal shrinking

Effect of the Duty Cycle of Flower-like Silver Nanostructures Fabricated with a Lyotropic Liquid Crystal on the SERS Spectrum

Surface-Enhanced Raman Scattering from Dye Molecules in Silicon Nanowire Structures Decorated by Gold Nanoparticles

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