Development of a sustainable plasmon-enhanced spectroelectrochemical sensor using avocado pit (Persea americana) extract

Lynk, Taylor P.; Clarke, Osai J. R.; Kesavan, Navya; Brosseau, Christa L.

doi:10.1016/j.snb.2017.10.137

Cited by 21 publications

(12 citation statements)

References 44 publications

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“…19 The presence of only one peak and the low fullwidth half-max (fwhm) value for the extinction profile (∼60 nm) suggests the nanoparticles are nonanisotropic spherical particles that are near-monodisperse. 19 Substrate Preparation. Carbon screen printed electrodes (SPEs) were used as the substrate, with the nanoparticle coating drop-cast onto the working electrode (WE).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…The size of the spheres was assessed based on analysis of the SEM images using ImageJ software. The localized surface plasmon resonance band at approximately 394 nm is indicative of silver nanospheres . The presence of only one peak and the low full-width half-max (fwhm) value for the extinction profile (∼60 nm) suggests the nanoparticles are nonanisotropic spherical particles that are near-monodisperse …”

Section: Results and Discussionmentioning

confidence: 99%

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Electrochemical Surface-Enhanced Raman Spectroscopy as a Platform for Bacterial Detection and Identification

2018

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The field of bacterial screening is in need of a rapid, easy to use, sensitive, and selective platform for bacterial detection and identification. Current methods of bacterial identification lack time efficiency, resulting in problems for many sectors of society. Surface-enhanced Raman spectroscopy (SERS) has been investigated as a possible candidate for bacterial screening due to its demonstrated ability to detect biological molecules with a high degree of sensitivity. However, the field of bacterial screening using SERS is currently facing limitations such as signal irreproducibility, weak spectra, and difficulty differentiating between strains based on the SERS spectra of bacteria alone. The current study reports on the first ever use of electrochemical surface-enhanced Raman spectroscopy (EC-SERS) for bacterial screening. The results of this study demonstrate the ability of EC-SERS to greatly improve upon the SERS performance for the detection of Gram-positive and Gram-negative bacteria both in terms of improved peak intensities and spectral richness. EC-SERS shows great promise in its ability to advance SERS-based bacterial screening and could potentially be used for more efficient species discrimination at the point-of-need (PON).

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Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Results and Discussionmentioning

confidence: 99%

Electrochemical Surface-Enhanced Raman Spectroscopy as a Platform for Bacterial Detection and Identification

2018

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“…Au NPs have also been used for the study of DNA bases, nucleotides, DNA aptamers and microRNA . Determination of p ‐aminothiophenol was carried out using Ag NPs obtained by green synthetic methods .…”

Section: Advantages In Usementioning

confidence: 99%

Spectroelectrochemical Sensing: Current Trends and Challenges

et al. 2019

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Spectroelectrochemistry (SEC) has been used for more than 50 years, but this set of techniques has not been widely used for quantitative analysis. For many years, no commercial instruments were available, which made very difficult to spread the use of SEC. Nowadays, only the creativity of the researchers is required to exploit the capabilities of SEC. This review is written with the aim of showing the potential of SEC, mainly for analytical chemistry. Here, we explain what SEC is, how analytical responses can be obtained, why these techniques are useful for sensors, with a brief description of its advantages in use, and, finally, we try to show the challenges that must be addressed in the next years. SEC can resolve interesting analytical problems using the high amount of data provided by this intrinsic trilinear technique. Given the quantitative analysis point of view of this review, the discussion of the SEC techniques is focused on UV/Vis absorption, photoluminescence and Raman SEC.

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“…Adenine is one such frequently studied biomolecule. Its intense surface‐enhanced Raman spectroscopy (SERS) signal has led to its frequent use as an example biomolecule to test and characterize SERS‐active substrates, for demonstration of single‐molecule detection, for detection of diseases and for determination of DNA hybridization, adsorption orientation, and quantification of nucleobase content . Furthermore, examining the spectral contribution of adenine and the other nucleobases has allowed for characterization of the adsorption of large complex biomolecules such as DNA and its components, as well as the cofactors flavin adenine dinucleotide (FAD) and nicotinamide adenine dinucleotide (NAD) .…”

Section: Introductionmentioning

confidence: 99%

The Controversial Orientation of Adenine on Gold and Silver

Harroun

2018

ChemPhysChem

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In which orientation does adenine adsorb on gold and silver surfaces? This question has been a matter of debate for over 30 years. Since the dawn of surface-enhanced Raman spectroscopy (SERS); it and other techniques such as tip-enhanced Raman spectroscopy (TERS), surface-enhanced infrared absorption spectroscopy (SEIRAS), scanning tunneling microscopy (STM), density functional theory (DFT) simulations, and more, have been used in many attempts to answer this seemingly straightforward, yet controversial, question. Herein, the timeline and recent advances on this topic are explored, and the frequently contradictory findings are put into context and discussed.

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Development of a sustainable plasmon-enhanced spectroelectrochemical sensor using avocado pit (Persea americana) extract

Cited by 21 publications

References 44 publications

Electrochemical Surface-Enhanced Raman Spectroscopy as a Platform for Bacterial Detection and Identification

Electrochemical Surface-Enhanced Raman Spectroscopy as a Platform for Bacterial Detection and Identification

Spectroelectrochemical Sensing: Current Trends and Challenges

The Controversial Orientation of Adenine on Gold and Silver

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