Electrochemically synthesized γ-Fe2O3 nanoparticles as peptide carriers and sensitive and reproducible SERS biosensors. Comparison of adsorption on γ-Fe2O3 versus Fe

Proniewicz, Leonard M.; Tąta, Agnieszka; Szkudlarek, Aleksandra; Świder, Joanna; Molenda, Marcin; Starowicz, M.; Ozaki, Yukihiro

doi:10.1016/j.apsusc.2019.143578

Cited by 19 publications

(16 citation statements)

References 89 publications

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“…The presence of Trp •– was unexpected. The Trp radical cation (Trp •+ ) is commonly reported in the protein literature, where Trp serves as an electron donor. ,− Indeed, others have used NATA alongside Trp to study the radical cation due to their similarities in the structure and the ability to associate changes with the indole ring moiety. The similarities in the SERS spectrum of Trp and NATA confirm that the signal obtained results from the indole ring structure.…”

Section: Discussionmentioning

confidence: 99%

Plasmonically Generated Tryptophan Radical Anion on Gold Nanoparticles Investigated by Combined Surface-Enhanced Raman Scattering and Density Functional Theory Calculations

et al. 2021

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Surface-enhanced Raman scattering (SERS) offers increases in chemical sensitivity associated with the Raman signal from molecules interacting with plasmonic nanoparticles and with use for diverse applications. This signal enhancement is the result of a combination of the enhanced electromagnetic field generated at the surface of the metal nanostructures and possible chemical enhancements specific to the molecule being detected. These chemical effects can alter the chemical identity of the analyte and manifest as differences in the SERS spectrum relative to the spontaneous Raman spectrum. In this work, we examine changes in the vibrational spectrum resulting from the previously hypothesized formation of a radical anion of the amino acid tryptophan on gold (Au) nanoparticles. Density functional theory calculations are used to model changes in the vibrational frequencies attendant to the tryptophan radical anion and correlated with the experimentally observed vibrational modes in the SERS spectrum of tryptophan (Trp) on Au nanoparticles. The calculated vibrational frequencies are in close agreement with the experimental data. N-Acetyltryptophanamide (NATA) is shown to have the same trends in the calculated and experimental vibrations, indicating that the captured electron is localized to the indole ring structure. Changes in the SERS spectrum with pH are readily explained by the calculations, further indicating that the observed signal originates from the ground-state radical anion in these experiments. This evidence for the capture of a hot electron by tryptophan and the resulting changes in the vibrational spectrum are important for molecular understanding of proteins and other molecules as detected by SERS.

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Section: Discussionmentioning

confidence: 99%

Plasmonically Generated Tryptophan Radical Anion on Gold Nanoparticles Investigated by Combined Surface-Enhanced Raman Scattering and Density Functional Theory Calculations

et al. 2021

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“…Because of this, it is possible to alter the biological function of these nanomaterials toward the site detecting of target molecules through multiple interactions and actively targeted imaging for sensing and diagnosis of viral infections [ 88 ]. The most common metal nanoparticles that have been used to treat viral infection or their detection are silver NPs [ 89 ], gold NPs [ 90 , 91 ], silica and mesoporous [ 88 , 92 – 94 ], carbon nanotubes [ 95 , 96 ], iron oxide NPs [ 97 ], etc.…”

Section: Detection Methodsmentioning

confidence: 99%

An Overview on SARS-CoV-2 (COVID-19) and Other Human Coronaviruses and Their Detection Capability via Amplification Assay, Chemical Sensing, Biosensing, Immunosensing, and Clinical Assays

et al. 2020

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A novel coronavirus of zoonotic origin (SARS-CoV-2) has recently been recognized in patients with acute respiratory disease. COVID-19 causative agent is structurally and genetically similar to SARS and bat SARS-like coronaviruses. The drastic increase in the number of coronavirus and its genome sequence have given us an unprecedented opportunity to perform bioinformatics and genomics analysis on this class of viruses. Clinical tests like PCR and ELISA for rapid detection of this virus are urgently needed for early identification of infected patients. However, these techniques are expensive and not readily available for point-of-care (POC) applications. Currently, lack of any rapid, available, and reliable POC detection method gives rise to the progression of COVID-19 as a horrible global problem. To solve the negative features of clinical investigation, we provide a brief introduction of the general features of coronaviruses and describe various amplification assays, sensing, biosensing, immunosensing, and aptasensing for the determination of various groups of coronaviruses applied as a template for the detection of SARS-CoV-2. All sensing and biosensing techniques developed for the determination of various classes of coronaviruses are useful to recognize the newly immerged coronavirus, i.e., SARS-CoV-2. Also, the introduction of sensing and biosensing methods sheds light on the way of designing a proper screening system to detect the virus at the early stage of infection to tranquilize the speed and vastity of spreading. Among other approaches investigated among molecular approaches and PCR or recognition of viral diseases, LAMP-based methods and LFAs are of great importance for their numerous benefits, which can be helpful to design a universal platform for detection of future emerging pathogenic viruses.

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“…The EF determined is up to 10 6 orders of magnitude for Ag and Au@SiO 2 ; 10 5 orders of magnitude for Au; 10 4 orders of magnitude for Cu and Ti; 10 3 orders of magnitude for ZnO, CuO, Cu 2 O, TiO 2 , and γ-Fe 2 O 3 ; and 10 2 orders of magnitude for Zn and Fe. 92 , 93 …”

Section: Resultsmentioning

confidence: 99%

SERS/TERS Characterization of New Potential Therapeutics: The Influence of Positional Isomerism, Interface Type, Oxidation State of Copper, and Incubation Time on Adsorption on the Surface of Copper(I) and (II) Oxide Nanoparticles

Proniewicz

Olszewski

2022

J. Med. Chem.

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The aim of this study was to investigate how the oxidation state of copper (Cu(I) vs Cu(II)), the nature of the interface (solid/aqueous vs solid/air), positional isomerism, and incubation time affect the functionalization of the surface of copper oxide nanostructures by [(butylamino)(pyridine)methyl]phenylphosphinic acid (PyPA). For this purpose, 2-, 3-, and 4-isomers of PyPA and the nanostructures were synthesized. The nanostructure were characterized by UV-visible spectroscopy (UV–vis), scanning electron microscopy (SEM), Raman spectroscopy (RS), and X-ray diffraction (XRD) analysis, which proved the formation of spherical Cu 2 O nanoparticles (Cu 2 ONPs; 1500–600 nm) and leaf-like CuO nanostructures (CuONSs; 80–180/400–700 nm, width/length). PyPA isomers were deposited on the surface of NSs, and adsorption was investigated by surface-enhanced Raman scattering (SERS) and tip-enhanced Raman scattering (TERS). The changes of adsorption on the surface of copper oxide NSs caused by the above-mentioned factors were described and the enhancement factor on this substrate was calculated.

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Electrochemically synthesized γ-Fe2O3 nanoparticles as peptide carriers and sensitive and reproducible SERS biosensors. Comparison of adsorption on γ-Fe2O3 versus Fe

Cited by 19 publications

References 89 publications

Plasmonically Generated Tryptophan Radical Anion on Gold Nanoparticles Investigated by Combined Surface-Enhanced Raman Scattering and Density Functional Theory Calculations

Plasmonically Generated Tryptophan Radical Anion on Gold Nanoparticles Investigated by Combined Surface-Enhanced Raman Scattering and Density Functional Theory Calculations

An Overview on SARS-CoV-2 (COVID-19) and Other Human Coronaviruses and Their Detection Capability via Amplification Assay, Chemical Sensing, Biosensing, Immunosensing, and Clinical Assays

SERS/TERS Characterization of New Potential Therapeutics: The Influence of Positional Isomerism, Interface Type, Oxidation State of Copper, and Incubation Time on Adsorption on the Surface of Copper(I) and (II) Oxide Nanoparticles

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