Gold nanoparticles decorated on Bingel–thiol functionalized multiwall carbon nanotubes as an efficient and robust catalyst

Fernandes, Carlos; Pereira, Clara; Guedes, Alexandra; Rebelo, Susana L.H.; Freire, Cristina

doi:10.1016/j.apcata.2014.08.031

Cited by 27 publications

(12 citation statements)

References 48 publications

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“…Interestingly, the spectrum does not show any detectable Cl signal which usually within the bonding energy ranges from 196 to 204 eV. Thus it proves that there is a complete reduction of Au (III) to Au (0) onto Mf which is very well confirmed from TEM analysis [43][44][45][46]. The O1s peak (531.9 eV) can be seen which corresponds to the surface component oxygen atoms.…”

Section: Elemental Composition Of Mf@a Npssupporting

confidence: 57%

Biofunctionalized MnFe₂O₄@Au core–shell nanoparticles for pH-responsive drug delivery and hyperthermal agent for cancer therapy

Ravichandran

Velumani

Tapia-Ramı́rez

et al. 2018

Artificial Cells, Nanomedicine, and Biotechnology

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Novel materials are explored very often by material scientists to design an efficient drug delivery system to target carcinoma cells. Among various nanosystem, functionalized Iron oxide Nanoparticles (IoNP) were definitely studied especially to target, endocyte and release drug moieties inside the cells. This IoNP platform is usually composed of an inorganic core and a highly biocompatible shell layer in order to perform numerous tasks at the same time, such as drug delivery, multimodal imaging, and instantaneous monitoring, along with collective therapeutic approaches. Hence, in this work, MnFe 2 O 4 @Au nanoparticles (Mf@A) are used as a structure for docking anti-cancer drug using a coupling molecule for the precise targeting. The formation of the core-shell structure was corroborated by high-angle annular dark-field scanning transmission electron microscopy and line mapping techniques. Superconducting quantum interference device confirms the fabricated nanostructure is favorably superparamagnetic. The stability of nanoparticles was examined by measuring the zeta-potential measurements. The binding efficiency of the drug onto the Mf@A was found to be >90%. Drug-release was carried out at different pH and found that the release is maximum at lower pH. Finally, at 2.45 GHz we employed as a magneto-hyperthermal agent which produced heat to kill the cancerous cell.

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Section: Elemental Composition Of Mf@a Npssupporting

confidence: 57%

Biofunctionalized MnFe₂O₄@Au core–shell nanoparticles for pH-responsive drug delivery and hyperthermal agent for cancer therapy

Ravichandran

Velumani

Tapia-Ramı́rez

et al. 2018

Artificial Cells, Nanomedicine, and Biotechnology

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“…S2). For both Fe 3 O 4 and Fe 3 O 4 @Au materials, the five phonon modes characteristic of ferrites with a cubic spinel structure (Fd3m crystal space group) are observed: A 1g (656 cm -1 ), 3T 2g (535-516, 444-427, and 211-198 cm -1 ), and E g (277-274 cm -1 ) (Fernandes et al, 2014;Jacintho et al, 2009;Pereira et al, 2012;Shebanova and Lazor, 2003). These results confirm the nature of the iron oxide cores indicated by XRD.…”

Section: Morphologic Structural and Chemical Characterization Of Fementioning

confidence: 99%

Electrochemical genoassays on gold-coated magnetic nanoparticles to quantify genetically modified organisms (GMOs) in food and feed as GMO percentage

Plácido

Pereira

Guedes³

et al. 2018

Biosensors and Bioelectronics

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The integration of nanomaterials in the field of (bio)sensors has allowed developing strategies with improved analytical performance. In this work, ultrasmall core-shell FeO@Au magnetic nanoparticles (MNPs) were used as the platform for the immobilization of event-specific Roundup Ready (RR) soybean and taxon-specific DNA sequences. Firstly, monodisperse FeO MNPs were synthesized by thermal decomposition and subsequently coated with a gold shell through reduction of Au(III) precursor on the surface of the MNPs in the presence of an organic capping agent. This nanosupport exhibited high colloidal stability, average particle size of 10.2 ± 1.3 nm, and spherical shape. The covalent immobilization of ssDNA probe onto the Au shell of the FeO@Au MNPs was achieved through a self-assembled monolayer (SAM) created from mixtures of alkane thiols (6-mercapto-1-hexanol and mercaptohexanoic acid). The influence of the thiols ratio on the electrochemical performance of the resulting electrochemical genoassays was studied, and remarkably, the best analytical performance was achieved for a pure mercaptohexanoic acid SAM. Two quantification assays were designed; one targeting an RR sequence and a second targeting a reference soybean gene, both with a sandwich format for hybridization, signaling probes labelled with fluorescein isothiocyanate (FITC), enzymatic amplification and chronoamperometric detection at screen-printed carbon electrodes (SPCE). The magnetogenoassays exhibited linear ranges from 0.1 to 10.0 nM and from 0.1 to 5.0 nM with similar detection limits of 0.02 nM and 0.05 nM for the event-specific (RR) and the taxon-specific (lectin) targets, respectively. The usefulness of the approach was demonstrated by its application to detect genetically modified organisms (GMOs) in feed and food.

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“…Au NPs are usually loaded on various supporting materials, such as polymer [7,8], reduced graphene oxide (RGO) [9], silica [10], carbon nanotubes (CNT) [11], metal oxides [12,13], to prevent coalesce, agglomeration, particle growth, and consequently a decrease in catalytic activity. Among them, the incorporation of Au NPs in mesoporous metal oxide supports provides a convincing strategy to hybrid heterogeneous catalysts for chemical transformation [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Mesoporous TiO2 nanofibers with controllable Au loadings for catalytic reduction of 4-nitrophenol

Hao

Shao

et al. 2015

Materials Science in Semiconductor Processing

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Gold nanoparticles decorated on Bingel–thiol functionalized multiwall carbon nanotubes as an efficient and robust catalyst

Cited by 27 publications

References 48 publications

Biofunctionalized MnFe₂O₄@Au core–shell nanoparticles for pH-responsive drug delivery and hyperthermal agent for cancer therapy

Biofunctionalized MnFe₂O₄@Au core–shell nanoparticles for pH-responsive drug delivery and hyperthermal agent for cancer therapy

Electrochemical genoassays on gold-coated magnetic nanoparticles to quantify genetically modified organisms (GMOs) in food and feed as GMO percentage

Mesoporous TiO2 nanofibers with controllable Au loadings for catalytic reduction of 4-nitrophenol

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Gold nanoparticles decorated on Bingel–thiol functionalized multiwall carbon nanotubes as an efficient and robust catalyst

Cited by 27 publications

References 48 publications

Biofunctionalized MnFe2O4@Au core–shell nanoparticles for pH-responsive drug delivery and hyperthermal agent for cancer therapy

Biofunctionalized MnFe2O4@Au core–shell nanoparticles for pH-responsive drug delivery and hyperthermal agent for cancer therapy

Electrochemical genoassays on gold-coated magnetic nanoparticles to quantify genetically modified organisms (GMOs) in food and feed as GMO percentage

Mesoporous TiO2 nanofibers with controllable Au loadings for catalytic reduction of 4-nitrophenol

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Biofunctionalized MnFe₂O₄@Au core–shell nanoparticles for pH-responsive drug delivery and hyperthermal agent for cancer therapy

Biofunctionalized MnFe₂O₄@Au core–shell nanoparticles for pH-responsive drug delivery and hyperthermal agent for cancer therapy