Tannic-Acid-Mediated Synthesis and Characterization of Magnetite–Gold Nanoplatforms for Photothermal Therapy

Miola, Marta; Multari, Cristina; Kostevšek, Nina; Gerbaldo, Roberto; Laviano, Francesco; Verné, Enrica

doi:10.2217/nnm-2023-0134

Nanomedicine (Lond.)

2023

DOI: 10.2217/nnm-2023-0134

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Tannic-Acid-Mediated Synthesis and Characterization of Magnetite–Gold Nanoplatforms for Photothermal Therapy

Marta Miola,

Cristina Multari,

Nina Kostevšek

et al.

Abstract: Aim: The design of new hybrid nanoplatforms (HNPs) through the innovative and eco-friendly use of tannic acid (TA) for the synthesis and stabilization of the nanoplatforms. Materials & methods: The size, morphology, composition and magnetic and plasmonic properties of HNPs were investigated together with their ability to generate heat under laser irradiation and the hemotoxicity to explore their potential use for biomedical applications. Results & conclusion: The use of TA allowed the synthesis of the … Show more

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Polyphenol-mediated preparation of metal nanoparticles: experimental and theoretical study

de Carvalho,

de Almeida,

da Silva Machado

et al. 2023

Chem. Pap.

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Polyphenol-mediated preparation of metal nanoparticles: experimental and theoretical study

de Carvalho,

de Almeida,

da Silva Machado

et al. 2023

Chem. Pap.

View full text Add to dashboard Cite

Facile Preparation of Tannic Acid-Gold Nanoparticles for Catalytic and Selective Detection of Mercury(II) and Iron(II) Ions in the Environmental Water Samples and Commercial Iron Supplement

Sun,

Chueh,

et al. 2024

ACS Omega

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Tannic acid (TA), a plant-derived polyphenol rich in hydroxyl groups, serves as both a reducing agent and stabilizer for synthesizing gold nanoparticles (TA-AuNPs). This study presents a groundbreaking method that utilizes TA to fabricate TA-AuNPs and develop two distinct colorimetric detection systems for mercury (Hg 2+ ) and iron (Fe 2+ ) ions. The first detection system leverages the interaction between TA-AuNPs and Hg 2+ to enhance the peroxidase-like activity of TA-AuNPs, facilitating the production of hydroxyl radicals upon reaction with hydrogen peroxide, which subsequently oxidizes 3,3′,5,5′-tetramethylbenzidine (TMB) into a blue-colored product (ox-TMB). The second system capitalizes on TA-AuNPs to catalyze the Fenton reaction between Fe 2+ and hydrogen peroxide in the presence of 2, 6-pyridinedicarboxylic acid, boosting the generation of hydroxyl radicals that oxidize TMB into a blue-colored ox-TMB. Absorbance measurements at 650 nm display a linear relationship with Hg 2+ concentrations ranging from 0.40 to 0.60 μM (R 2 = 0.99) and Fe 2+ concentrations from 0.25 to 2.0 μM (R 2 = 0.98). The established detection limits for Hg 2+ and Fe 2+ are 18 nM and 96 nM, respectively. Applications to realworld samples achieved an excellent spiked recovery, spanning 101.6% to 108.0% for Hg 2+ and 90.0% to 112.5% for Fe 2+ , demonstrating the method's superior simplicity, speed, and cost-effectiveness for environmental monitoring of these ions compared to existing techniques.

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One-Pot Synthesis of Tannic Acid-Au Nanoparticles for the Colorimetric Determination of Hydrogen Peroxide and Glucose

Peng,

Wang,

Chueh

et al. 2024

ACS Omega

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This study introduces a novel one-pot method employing tannic acid (TA) to synthesize stable gold nanoparticles (TA-AuNPs), which are characterized using transmission electron microscopy, X-ray powder diffraction, and Fourier transform infrared spectroscopy. We apply these TA-AuNPs in a newly developed colorimetric assay for hydrogen peroxide (H 2 O 2 ) detection that utilizes the oxidation of iodide (I − ) on TA-AuNPs, leading to a detectable yellow color change in the solution. The reaction kinetics are captured by the rate equation R = 0.217[KI] 0.61 [H 2 O 2 ] 0.69 . The possible sensing mechanism was proposed through density functional theory calculations. At the optimum conditions, the proposed TA-AuNPs/I − system demonstrated a linear relationship between H 2 O 2 concentration and absorbance intensity (λ = 350 nm) and achieved a limit of detection (LOD) of 7.33 μM. Furthermore, we expand the utility of this approach to glucose detection by integrating glucose oxidase into the system, resulting in a LOD of 10.0 μM. Application of this method to actual urine samples yielded spiked recovery rates ranging from 96.6−102.0% and relative standard deviations between 3.00−8.34%, underscoring its efficacy and potential for real-world bioanalytical challenges.

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Tannic-Acid-Mediated Synthesis and Characterization of Magnetite–Gold Nanoplatforms for Photothermal Therapy

Cited by 3 publications

References 48 publications

Polyphenol-mediated preparation of metal nanoparticles: experimental and theoretical study

Polyphenol-mediated preparation of metal nanoparticles: experimental and theoretical study

Facile Preparation of Tannic Acid-Gold Nanoparticles for Catalytic and Selective Detection of Mercury(II) and Iron(II) Ions in the Environmental Water Samples and Commercial Iron Supplement

One-Pot Synthesis of Tannic Acid-Au Nanoparticles for the Colorimetric Determination of Hydrogen Peroxide and Glucose

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