Evaluation of a photoelectrochemical platform based on strontium titanate, sulfur doped carbon nitride and palladium nanoparticles for detection of SARS-CoV-2 spike glycoprotein S1

Botelho, Chirlene Nascimento; Falcão, Suringo S.; Soares, Rossy-Eric Pereira; Pereira, Silma Regina Ferreira; Silva, Alan Menezes da; Kubota, Lauro T.; Damos, Flávio Santos; Luz, Rita C. S.

doi:10.1016/j.biosx.2022.100167

Cited by 7 publications

(5 citation statements)

References 55 publications

(56 reference statements)

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“…Nobel metal nanomaterials.-The Nobel metal nanoparticles such as gold, silver, platinum, and palladium are widely used nanomaterials to modify the screen printed electrode. 102,111 Along with the superior electrochemical properties noble metals are also used for their unique size, and shape dependent physical and chemical properties. These noble nanomaterials plays a crucial role in enhancement of electrochemical reactions which throughout the sensitivity, selectivity, and signal amplification.…”

Section: Nanomaterials To Modify Screen Printed Electrodesmentioning

confidence: 99%

“…Chirlene N. Botelho and co-workers reported the use of palladium nanoparticles for detection of SARS-CoV-2 spike glycoprotein S1. 111 Metal oxide nanomaterials.-For the development of electrochemical sensor systems, metal oxide nanoparticles with large surface areas, strong adsorptive capacities, distinctive electrochemical activity, and stability are crucial. Uniformed nanostructures like nanorods, nanofibers, nanobelt, nanocomb and nanotubes are constructive metal oxide nanomaterials for modifying the electrode.…”

Section: Nanomaterials To Modify Screen Printed Electrodesmentioning

confidence: 99%

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Review—Role of Nanomaterials in Screenprinted Electrochemical Biosensors for Detection of Covid-19 and for Post-Covid Syndromes

et al. 2023

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Covid-19 remains a global pandemic surging with different variants like (Omicron) in various countries. An escalation in random testing for Covid-19 is considered as the golden standard by WHO to control the spread of Corona virus. RT-PCR and nucleic acid hybridization strategies are two highly sensitive outstanding tests used for the detection of SARS-CoV-2 in the DNA by the former and RNA/DNA by the later. Apart from the test for virus, antigen, and antibodies, other alternative hematological tests like CRP, Ferritine, IL-6, Blood Platelets and WBC, and plasma became essential for the detection and management of Covid-19. Overcoming the limitations of a rapid, efficient, low-cost, and easy-to-implement test kits are in imperative need to meet these requirements. Electrochemical sensors are considered as potential and ultrafast point-of-care sensors used as self-testing kits. In this work, we review the various modified electrodes with different nanomaterials such as graphene, CNTs, and nano-dopants used as electrochemical sensors in association with testing various different parameters for detection of covid-19. A detailed discussion on the merits of present testing patterns and scope of screen-printed electrochemical sensors modified with different nanomaterials and their advantages is presented.

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Section: Nanomaterials To Modify Screen Printed Electrodesmentioning

confidence: 99%

Section: Nanomaterials To Modify Screen Printed Electrodesmentioning

confidence: 99%

Review—Role of Nanomaterials in Screenprinted Electrochemical Biosensors for Detection of Covid-19 and for Post-Covid Syndromes

et al. 2023

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“…Strontium titanate (SrTiO 3 ) is a perovskite oxide with a cubic structure at room temperature and a wide band gap energy of 3.2 eV. It is characterized by a low value of dielectric loss and leakage current as well as a high dielectric constant [ 22 , 23 ]. Incorporating SrTiO 3 into a polymer matrix enhances its thermal and optical properties.…”

Section: Introductionmentioning

confidence: 99%

“…These properties can be optimized by factors like blend homogeneity and particle size. The nanocomposites of PVDF–graphene oxide (GO) were prepared so that the addition of GO increased the absorbance and affected the refractive index [ 23 ]. PVDF/ZnO nanocomposite films were synthesized, and as the weight of ZnO increased in the films, the refractive index increased, while the direct and indirect energy gap decreased [ 30 ].…”

Section: Introductionmentioning

confidence: 99%

Structure–Property Relationships in PVDF/SrTiO3/CNT Nanocomposites for Optoelectronic and Solar Cell Applications

Taha,

Alanazi,

El-Nasser

et al. 2024

Polymers

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The optical properties of polyvinylidene fluoride (PVDF) polymer nanocomposite films incorporating SrTiO3/carbon nanotubes (CNTs) as nanofillers are investigated. PVDF/SrTiO3/CNTs films were prepared by the solution casting technique. X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM) analyses confirmed the incorporation of SrTiO3/CNTs into the PVDF matrix. The addition of nanofillers influenced the crystalline structure, morphology, and optical properties of the films. SEM images showed spherulite morphology, which is a spherical aggregate of crystalline polymer chains. The addition of a SrTiO3/CNTs nanofiller modified the polymer’s electronic structure, causing a variation in the energy gap. The addition of SrTiO3/CNTs at 0.1 wt% increased the band gap, refractive index, and nonlinear optical properties of the PVDF films. These improvements indicate the potential of these nanocomposite films in optoelectronic applications such as solar cells, image sensors, and organic light-emitting diodes.

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“…Strontium titanate (SrTiO 3 ) has been employed as a dopant for polymer films due to its distinct characteristics, i.e., a high dielectric constant, low dielectric loss, and minimal leakage current. With a relatively wide band gap energy of approximately 3.2 eV and a cubic perovskite structure at room temperature, SrTiO 3 is anticipated to improve the thermal and optical performance of PVA polymer films when used as a dopant [3,13,14]. Hence, previously the thermal and dielectric properties of undoped PVA and doped PVA with SrTiO 3 were examined.…”

Section: Introductionmentioning

confidence: 99%

Structural, Optical, and Thermal Properties of PVA/SrTiO3/CNT Polymer Nanocomposites

Alshammari

2024

Polymers

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Successful preparation of PVA/SrTiO3/CNT polymer nanocomposite films was accomplished via the solution casting method. The structural, optical, and thermal properties of the films were tested by XRD, SEM, FTIR, TGA, and UV-visible spectroscopy. Inclusion of the SrTiO3/CNT nanofillers with a maximum of 1 wt% drastically improved the optical and thermal properties of PVA films. SrTiO3 has a cubic crystal structure, and its average crystal size was found to be 28.75 nm. SEM images showed uniform distribution in the sample with 0.3 wt% of SrTiO3/CNTs in the PVA film, while some agglomerations appeared in the samples of higher SrTiO3/CNT content, i.e., at 0.7 and 1.0 wt%, in the PVA polymer films. The inclusion of SrTiO3/CNTs improved the thermal stability of PVA polymer films. The direct and indirect optical band gaps of the PVA films decreased when increasing the mass of the SrTiO3/CNTs, while the single-oscillator energy (E0) and dispersion energy (Ed) increased. The films’ refractive indices were gradually increased upon increasing the nanofillers’ weight. In addition, improvements in the optical susceptibility and nonlinear refractive indices’ values were also obtained. These films are qualified for optoelectronic applications due to their distinct optical and thermal properties.

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Evaluation of a photoelectrochemical platform based on strontium titanate, sulfur doped carbon nitride and palladium nanoparticles for detection of SARS-CoV-2 spike glycoprotein S1

Cited by 7 publications

References 55 publications

Review—Role of Nanomaterials in Screenprinted Electrochemical Biosensors for Detection of Covid-19 and for Post-Covid Syndromes

Review—Role of Nanomaterials in Screenprinted Electrochemical Biosensors for Detection of Covid-19 and for Post-Covid Syndromes

Structure–Property Relationships in PVDF/SrTiO3/CNT Nanocomposites for Optoelectronic and Solar Cell Applications

Structural, Optical, and Thermal Properties of PVA/SrTiO3/CNT Polymer Nanocomposites

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