Synthesis of albumin capped gold nanoparticles and their direct attachment on glassy carbon electrode for the determination of nitrite ion

Shankar, Sekar; Gowthaman, N.S.K.; John, S. Abraham

doi:10.1016/j.jelechem.2018.09.030

Cited by 25 publications

(10 citation statements)

References 44 publications

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“…The intensive lines of C 1s, N 1s, O 1s, and Fe 2p corresponded to the photoelectron peaks of each element ( Figure 4 .). The C 1s peak in the spectra of the resulting polymer shows the four components at the binding energies of 284.6, 285.1, 286.3, 287.3, and 290.4 eV, which was due to the functional groups of C-C/C-H, C=C, C-N, C=N, and C=O [ 17 , 18 , 19 , 20 , 21 ], respectively. In addition, the peaks at 398.6, 399.7, and 402.8 eV were related to the chemical environments of C=N, C-N, and N-H [ 22 , 23 , 24 ], respectively.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of Magnetic Ferrocene-Containing Polymer with Photothermal Effects for Rapid Degradation of Methylene Blue

et al. 2021

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Photothermal materials are attracting more and more attention. In this research, we synthesized a ferrocene-containing polymer with magnetism and photothermal properties. The resulting polymer was characterized by Fourier-transform infrared (FT-IR), vibrating sample magnetometer (VSM), scanning electron microscope (SEM), energy dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and thermogravimetric analysis (TGA). Its photo-thermocatalytic activity was investigated by choosing methylene blue (MB) as a model compound. The degradation percent of MB under an irradiated 808 nm laser reaches 99.5% within 15 min, and the degradation rate is 0.5517 min−1, which is 145 times more than that of room temperature degradation. Under irradiation with simulated sunlight, the degradation rate is 0.0092 min−1, which is approximately 2.5 times more than that of room temperature degradation. The present study may open up a feasible route to degrade organic pollutants.

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Section: Resultsmentioning

confidence: 99%

Synthesis of Magnetic Ferrocene-Containing Polymer with Photothermal Effects for Rapid Degradation of Methylene Blue

et al. 2021

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“…The FT-IR spectra of CMC−GE showed an obvious characteristic absorption of epoxy groups at 894 cm −1 [ 32 ]. After AQ was functionalized, the characteristic absorption of the epoxy group almost disappeared, and the absorptions at 1384 and 1625 cm −1 originated from C−N stretching vibration and N−H stretching vibration, respectively [ 36 ]. The FT-IR spectra data strongly elucidated that the AQ was introduced onto CMC−GE by the epoxy groups.…”

Section: Resultsmentioning

confidence: 99%

A New Cellulose-Based Fluorescent Probe for Specific and Sensitive Detection of Cu2+ and Its Applications in the Analysis of Environmental Water

et al. 2022

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In this work, a novel fluorescent probe CMC−GE−AQ with an effective sensitive detection ability for Cu2+ was synthesized and constructed by using carboxymethyl cellulose (CMC) as the skeleton and 8-aminoquinoline (AQ) as the fluorophore. This probe exhibited a highly specific “turn-off” fluorescence response to Cu2+, and the fluorescence color changed from bright orange to colorless after adding Cu2+. The probe could selectively detect Cu2+ in a complex environment and its detection limit (LOD), the binding constant (Ka) and the numbers of binding sites (n) were calculated to be 6.4 × 10−8 mol L−1, 1.7 × 106 mol−1 L and 1.2, respectively. The sensing detection mechanism was confirmed by X-ray photoelectron spectroscopy (XPS) and density functional theory (DFT) calculations. In addition, the probe CMC−GE−AQ was successfully applied to detect Cu2+ in real water samples, and CMC−GE−AQ-based fluorescent microspheres can serve as a convenient tool for the detection of Cu2+.

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“…The successful assembly of a BSA single layer on Au was initially verified by XPS (Figure A). As presented in Figure B, the C1s spectra was fitted into four main components with binding energies of 284.6, 286.1, 287.7, and 288.3 eV, corresponding to the C–C, C–N, CO, and O–CO of BSA, respectively . In the N1s peak and O1s peak, OC (532.4 eV), O–C (531.8 eV), O–CO (531.2 eV), −NH (399.8 eV), and −NH 2 (400.2 eV) can be observed in Figure C,D .…”

Section: Resultsmentioning

confidence: 99%

A Bio-inspired Extended-Gate Metal-Oxide-Semiconductor Field-Effect-Transistor for Highly Sensitive Amino Acid Enantiodiscrimination

Zhang

Dai³

et al. 2021

Anal. Chem.

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As the most important small molecules revealing the origins of life, amino acids (AAs) play essential roles in living organisms and their facile enantiodiscrimination has long been a great challenge for analytical chemists. Inspired by the specific stereomatching effect between biomolecules and AA enantiomers, herein, we first developed a bio-inspired highly sensitive platform based on an extended-gate metal-oxide-semiconductor field-effecttransistor (EG-MOSFET) for highly sensitive AA enantiodiscrimination. Bovine serum albumin (BSA) was self-assembled on deposited Au surfaces to afford the extended gate (EG) sensing unit, and its enantiorecognition ability was initially verified using common electrochemical techniques. The EG was thereafter installed to a MOSFET to build the desired BSA-EG-MOSFET highly sensitive chiral sensing platform, which realized the efficient enantiodiscrimination of essential AAs with high sensitivity, where effective chiral resolution was achieved at the femtomole level to phenylalanine (Phe). Combining molecular docking and circular dichroism spectroscopy, the weak intermolecular interactions between BSA and AAs enantiomers were investigated and the mechanism for signal amplification was proposed. Our results demonstrate that the as-fabricated biosensor has great potential in highly sensitive chiral sensing fields and can also afford a potential tool for biomolecular interaction investigations.

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Synthesis of albumin capped gold nanoparticles and their direct attachment on glassy carbon electrode for the determination of nitrite ion

Cited by 25 publications

References 44 publications

Synthesis of Magnetic Ferrocene-Containing Polymer with Photothermal Effects for Rapid Degradation of Methylene Blue

Synthesis of Magnetic Ferrocene-Containing Polymer with Photothermal Effects for Rapid Degradation of Methylene Blue

A New Cellulose-Based Fluorescent Probe for Specific and Sensitive Detection of Cu2+ and Its Applications in the Analysis of Environmental Water

A Bio-inspired Extended-Gate Metal-Oxide-Semiconductor Field-Effect-Transistor for Highly Sensitive Amino Acid Enantiodiscrimination

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