Tannic Acid Capped Copper Nanoclusters as a Cost-Effective Fluorescence Probe for Hemoglobin Determination

Sam, Sonia; Anand, Sanu K.; Mathew, Manna Rachel; Kumar, Krishnapillai Girish

doi:10.2116/analsci.20p322

Cited by 8 publications

(2 citation statements)

References 42 publications

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“…where S is the standard deviation of five replicate measurements of lowest concentration and M is the slope of the calibration plot. 26,27 Corresponding overlay of SWVs is shown in Fig. 5.…”

Section: Resultsmentioning

confidence: 99%

A Simple Electropolymer Based Voltammetric Sensor for the Simultaneous Determination of Melanoma Biomarkers–L-Dopa and L-Tyrosine

Sam

Mathew

Kumar

2022

J. Electrochem. Soc.

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This article describes the development of a simple electropolymer based voltammetric sensor for the sensitive determination of melanoma biomarkers, L-Dopa and L-Tyrosine. A glassy carbon electrode modified with poly para toluene sulphonic acid which is an excellent electro-catalyst for the oxidation of L-Dopa and L-Tyrosine enables their simultaneous determination. Fabrication, characterization, calibration, real sample applicability as well as consistency in performance of the sensor are discussed in detail. For the simultaneous determination, linear calibration plot has been obtained in two dynamic ranges for both the analytes. For L-Dopa it is from 9.00 × 10−5 M to 2.00 × 10−5 M and from1.00 × 10−5 to 1.00 × 10−6 M and for L-Tyrosine, 7.00 × 10−5 M to 2.00 × 10−5 M and from1.00 × 10−5 to 1.00 × 10−6 M are the two dynamic ranges. The recovery values obtained through spike recovery analysis demonstrates its practical application in real sample analysis.

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Section: Resultsmentioning

confidence: 99%

A Simple Electropolymer Based Voltammetric Sensor for the Simultaneous Determination of Melanoma Biomarkers–L-Dopa and L-Tyrosine

Sam

Mathew

Kumar

2022

J. Electrochem. Soc.

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“…After the removal of unincorporated dyes, tannic acid (TA) was coated on the surface of silica NPs encapsulating OXA (OXA@SiO 2 NPs) . TA easily undergoes polymerization in the presence of Fe 3+ to form a coating film on the surface of NPs, which does not induce the lowering of colloidal stability. − Furthermore, a TA layer serves as a versatile platform for surface functionalization via Michael addition and Schiff base reactions. , The newly synthesized NPs were dried in vacuum and evaluated by transmission electron microscopy (TEM), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), and X-ray photoelectron spectroscopy (XPS). After the elaborate characterization of TA-coated silica NPs encapsulating OXA (OXA@SiO 2 @TA NPs), the photophysical properties of dyes incorporated in the NPs and the colloidal stability of the NPs were investigated and compared between OXA@SiO 2 NPs and OXA@SiO 2 @TA NPs.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Silica Nanoparticles with Physical Encapsulation of Near-Infrared Fluorescent Dyes and Their Tannic Acid Coating

et al. 2021

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This study reports a novel method for the synthesis of silica nanoparticles (NPs) encapsulating near-infrared (NIR) fluorescent dyes through physical adsorption. Although a NIR cationic fluorescent dye, oxazine 725 (OXA), has no chemical bonding moiety toward silica NPs such as the triethoxysilyl group, the dyes were successfully incorporated into silica NPs without denaturation under the mild reaction conditions. Next, tannic acid (TA) molecules were coated in the presence of Fe 3+ on the particle surface for the functionalization of silica NPs encapsulating OXA (OXA@SiO 2 NPs). The TA coating on the surface of OXA@SiO 2 NPs was confirmed by transmission electron microscopy and X-ray photoelectron spectroscopy. The TA coating significantly contributed to the resistance improvement against photobleaching and leakage of the dyes in the NPs. Furthermore, the obtained TA-coated silica NPs encapsulating OXAs (OXA@SiO 2 @TA NPs) were used for the fluorescence imaging of African green monkey kidney (COS-7) cells, and it was shown that the fluorescence originated from OXA@SiO 2 @TA NPs was clearly observed in the COS-7 cells.

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Interactions of coinage metal nanoclusters with low-molecular-weight biocompounds

Buglak,

Nguyen

2024

Biophys Rev

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Tannic Acid Capped Copper Nanoclusters as a Cost-Effective Fluorescence Probe for Hemoglobin Determination

Cited by 8 publications

References 42 publications

A Simple Electropolymer Based Voltammetric Sensor for the Simultaneous Determination of Melanoma Biomarkers–L-Dopa and L-Tyrosine

A Simple Electropolymer Based Voltammetric Sensor for the Simultaneous Determination of Melanoma Biomarkers–L-Dopa and L-Tyrosine

Synthesis of Silica Nanoparticles with Physical Encapsulation of Near-Infrared Fluorescent Dyes and Their Tannic Acid Coating

Interactions of coinage metal nanoclusters with low-molecular-weight biocompounds

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