Hierarchically structured CuFe<sub>2</sub>O<sub>4</sub> ND@RGO composite for the detection of oxidative stress biomarker in biological fluids

Rajaji, Umamaheswari; Govindasamy, Mani; Chen, Shen‐Ming; Ali, M. Ajmal; Fahad, Muhammad; Elshikh, Mohamed S.; Farah, Mohammad Abul

doi:10.1039/c7qi00799j

Cited by 48 publications

(7 citation statements)

References 41 publications

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“…Figure 2 depicts the XRD patterns of the synthesized NH 2 rGO, and NH 2 rGO-PAMAM composite. The formation of the synthesized NH 2 rGO was confirmed by a broad diffraction peak at 2θ = 26.35 and a small hump at 2θ = 40.17°, which stand for the (002) and (100) crystal plane of NH 2 rGO [69][70][71][72] . After being composited with PAMAM, the amorphous nature of NH 2 rGO was restored and slightly shifted to the left.…”

Section: Resultsmentioning

confidence: 99%

Sensitive Detection of Dengue Virus Type 2 E-Proteins Signals Using Self-Assembled Monolayers/Reduced Graphene Oxide-PAMAM Dendrimer Thin Film-SPR Optical Sensor

Omar

Fen

Abdullah

et al. 2020

Sci Rep

116

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In this work, sensitive detection of dengue virus type 2 E-proteins (DENV-2 E-proteins) was performed in the range of 0.08 pM to 0.5 pM. The successful DENV detection at very low concentration is a matter of concern for targeting the early detection after the onset of dengue symptoms. Here, we developed a SPR sensor based on self-assembled monolayer/reduced graphene oxide-polyamidoamine dendrimer (SAM/NH 2 rGO/PAMAM) thin film to detect DENV-2 E-proteins. Surface characterizations involving X-ray diffraction (XRD) and Fourier-transform infrared spectroscopy (FTIR) confirms the incorporation of NH 2 rGO-PAMAM nanoparticles in the prepared sensor films. The specificity, sensitivity, binding affinity, and selectivity of the SPR sensor were then evaluated. Results indicated that the variation of the sensing layer due to different spin speed, time incubation, and concentration provided a better interaction between the analyte and sensing layer. The linear dependence of the SPR sensor showed good linearity (R 2 = 0.92) with the lowest detection of 0.08 pM DENV-2 E-proteins. By using the Langmuir model, the equilibrium association constant was obtained at very high value of 6.6844 TM −1 (R 2 = 0.99). High selectivity of the SPR sensor towards DENV-2 E-proteins was achieved in the presence of other competitors. Dengue virus (DENV) is the most common arthropod-borne viral disease that poses a serious global problem. According to World Health Organization (WHO), the dengue virus is the leading cause of death of 22 000, annually. As of today, the need for hospitalization and medical treatment are constantly dense due to the fact that 390 million people in the world are still infected with DENV 1. Its four distinct serotypes (DENV-1. DENV-2, DENV-3, and DENV-4) are capable of causing a range of clinical symptoms ranging from mild fevers to the severe dengue haemorrhagic fever (DHF) and be potentially life-threatening 2-10. Despite its large burden to human health, no effective vaccine and antiviral therapy are available for the virus 11,12. Early treatment for DENV is only by maintaining the body fluid of the patient, as it is critical in fighting the severe symptoms of DENV 13,14. Hence, an early, rapid, and accurate diagnosis at the onset of infection is the demand of the day in the most epidemic settings. Present discoveries in dengue diagnostics that can help in the early diagnosis are targeting the host-virus itself. DENV consists of a single-stranded positive-sense RNA virus that encodes 10 different types of proteins. Seven of

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Section: Resultsmentioning

confidence: 99%

Sensitive Detection of Dengue Virus Type 2 E-Proteins Signals Using Self-Assembled Monolayers/Reduced Graphene Oxide-PAMAM Dendrimer Thin Film-SPR Optical Sensor

Omar

Fen

Abdullah

et al. 2020

Sci Rep

116

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“…Reduced graphene oxide (rGO) is considered an ideal electrochemical nanomaterial for different applications due to its unique chemical, electrical and optical properties [23] , [24] , [25] , [26] . The advantages of rGO are ease of preparation (from graphene oxide), stable dispersion in water and high number of catalytic sites on its surface [27] , [28] , [29] .…”

Section: Introductionmentioning

confidence: 99%

Facile one pot sonochemical synthesis of layered nanostructure of ZnS NPs/rGO nanosheets for simultaneous analysis of daclatasvir and hydroxychloroquine

Alkahtani

Mahmoud

Mahnashi

et al. 2021

Microchemical Journal

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“…However, three characteristic peaks of (220), (222), and (422) which are marked by green at 2θ values 30.8, 36.05, and 54.17°, respectively, represent the cubic phase of CuFe 2 O 4 (JCPDS no. 85-1326) . After heterostructure formation, no shifting of the BiOX peaks has been observed and the characteristic peaks of CFO are present (marked by “*”), implying the successful heterostructure formation between BiOX and CFO (Figure b).…”

Section: Resultsmentioning

confidence: 98%

Band Edge Engineering of BiOX/CuFe₂O₄ Heterostructures for Efficient Water Splitting

Bera

Ghosh

Maiyalagan

et al. 2022

ACS Appl. Energy Mater.

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Layered bismuth oxyhalides (BiOX, X = Cl, Br, and I) are promising visible light-responsive photocatalysts but suffer from inadequate electron transportation from the bulk to the surface. Construction of heterostructures has been considered as a convenient approach to improve the spatial charge carrier separation and enhance the efficiencies of the surface-reactive charges for catalysis. Here, a series of heterostructures has been successfully designed for n-type bismuth oxyhalides and p-type spinel ferrites CuFe2O4 (CFO) by a facile and generalized protocol via the hydrothermal method followed by the co-precipitation method. The heterostructure introduces built-in electric field at the interface that facilitates vectorial charge transfer, which demonstrated significantly improved visible light-driven photocatalytic activity toward H2 generation without using any noble metal co-catalyst. A conventional type-I and type-II charge transfer mechanism has been followed for BiOBr/CFO and BiOI/CFO heterostructures, respectively, which may effectively lower charge transfer resistance compared to that for bare BiOBr and BiOI, suggesting facile charge transfer. Remarkably, a direct Z-scheme BiOCl/CFO heterostructure has been formed between BiOCl and CFO with an intimate interfacial contact, which demonstrated 5.7 times higher H2 generation activity than pure BiOCl and two fold improved catalytic efficiency compared to type-II BiOI/CFO heterostructures under visible light. Very low resistance in electrochemical impedance spectra confirmed the superiority of the direct Z-scheme in promoting the charge separation and transfer and increase in carrier density. Moreover, the optimal space charge layer width and the redox potentials have been achieved for BiOCl/CFO through the engineering of band edge potentials, which reduces the fast recombination rate. This work offers a paradigm for the design of highly engineered BiOX-based heterostructures with tuned band structures for efficient photocatalytic water splitting.

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Hierarchically structured CuFe₂O₄ ND@RGO composite for the detection of oxidative stress biomarker in biological fluids

Abstract: In this work, stable and catalytically active copper ferrite nanodots (CuFe2O4) entrapped by porous RGO nanosheets were prepared via a facile condensation process using a green reducing agent.

Cited by 48 publications

References 41 publications

Sensitive Detection of Dengue Virus Type 2 E-Proteins Signals Using Self-Assembled Monolayers/Reduced Graphene Oxide-PAMAM Dendrimer Thin Film-SPR Optical Sensor

Sensitive Detection of Dengue Virus Type 2 E-Proteins Signals Using Self-Assembled Monolayers/Reduced Graphene Oxide-PAMAM Dendrimer Thin Film-SPR Optical Sensor

Facile one pot sonochemical synthesis of layered nanostructure of ZnS NPs/rGO nanosheets for simultaneous analysis of daclatasvir and hydroxychloroquine

Band Edge Engineering of BiOX/CuFe₂O₄ Heterostructures for Efficient Water Splitting

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Hierarchically structured CuFe2O4 ND@RGO composite for the detection of oxidative stress biomarker in biological fluids

Abstract: In this work, stable and catalytically active copper ferrite nanodots (CuFe2O4) entrapped by porous RGO nanosheets were prepared via a facile condensation process using a green reducing agent.

Cited by 48 publications

References 41 publications

Sensitive Detection of Dengue Virus Type 2 E-Proteins Signals Using Self-Assembled Monolayers/Reduced Graphene Oxide-PAMAM Dendrimer Thin Film-SPR Optical Sensor

Sensitive Detection of Dengue Virus Type 2 E-Proteins Signals Using Self-Assembled Monolayers/Reduced Graphene Oxide-PAMAM Dendrimer Thin Film-SPR Optical Sensor

Facile one pot sonochemical synthesis of layered nanostructure of ZnS NPs/rGO nanosheets for simultaneous analysis of daclatasvir and hydroxychloroquine

Band Edge Engineering of BiOX/CuFe2O4 Heterostructures for Efficient Water Splitting

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Hierarchically structured CuFe₂O₄ ND@RGO composite for the detection of oxidative stress biomarker in biological fluids

Band Edge Engineering of BiOX/CuFe₂O₄ Heterostructures for Efficient Water Splitting