Switch-On fluorescence and photo-induced electron transfer of 3-aminopropyltriethoxysilane to ZnO: Dual applications in sensors and antibacterial activity

Saravanan, P.; Jayamoorthy, K.; Kumar, S. Ananda

doi:10.1016/j.snb.2015.05.069

Cited by 57 publications

(11 citation statements)

References 36 publications

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“…Different reagents have been employed as capping agents, altering growth kinetics at certain facets and driving morphological diversity. These agents include mercaptoethanol (resulting in spherical particles) [ 18 ], 3-aminopropyltriethoxysilane (spherical) [ 19 ], monoethanolamine (nanosheet) [ 20 ], fatty acids (nanorods) [ 21 ], curcumin (semi-spherical core-shell) [ 8 ], mercaptoacetic acid (spherical) [ 22 ], and enzymes (spherical) [ 23 ]. In addition, the incorporation of ZnO NPs and silver nanoparticles was reported previously.…”

Section: Introductionmentioning

confidence: 99%

The Decoration of ZnO Nanoparticles by Gamma Aminobutyric Acid, Curcumin Derivative and Silver Nanoparticles: Synthesis, Characterization and Antibacterial Evaluation

et al. 2021

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Zinc oxide nanoparticles (ZnO NPs) are applied in various applications in catalysis, biosensing, imaging, and as antibacterial agents. Here we to prepare ZnO nanomaterials decorated by γ-amino butyric acid (GABA), curcumin derivatives (CurBF2) and silver nanoparticles (CurBF2-AgNPs). The structures of all ZnO nanostructures were characterized using Fourier transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), UV–VIS spectrophotometry, fluorescence spectrophotometry, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and high-resolution transmission electron microscopy (HR-TEM). Further, their antibacterial activities against Gram-negative (Escherichia coli) and Gram-positive (Staphylococcus aureus) bacteria were investigated through analysis of minimum inhibitory concentration (MIC) method. Among the prepared nanostructures, the ZnO NPs-GABA/CurBF2-AgNPs showed excellent antibacterial activity against both Gram-positive and -negative bacteria. ZnO NPs fabricated here may have potential use in future anti-bacterial compositions and coatings technologies.

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Section: Introductionmentioning

confidence: 99%

The Decoration of ZnO Nanoparticles by Gamma Aminobutyric Acid, Curcumin Derivative and Silver Nanoparticles: Synthesis, Characterization and Antibacterial Evaluation

et al. 2021

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“…Reportedly, ethanol suspension of Au/TiO 2 , maintaining charge equilibrium by transferring photoexcited electrons from TiO 2 to Au nanoparticles [5]. Because of the usage of ethanol as a solvent, possible recombination of electrons in Au and holes in TiO 2 has not been studied [11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Inhibition of Switch-on Fluorescence of Fluorochrome on Loading TiO2 with Gold

K.I

Jiang

et al. 2021

Preprint

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Gold loaded TiO2 nanoparticles have been synthesized and characterized by powder XRD, HR-TEM, and EDX analysis. The binding interaction of fluorescent sensor 5-amino-2-mercaptobenzimidazole (fluorochrome) with TiO2 and gold loaded TiO2 nanoparticles has been discussed herein. The interaction of fluorochrome with TiO2 and gold loaded TiO2 nanoparticles has been studied by UV-visible, fluorescence, and FT-IR spectral techniques. The fluorescence emission occurs at 421 nm and this has been selectively enhanced by TiO2 nano semiconductor. This technique is sensitive to detect and estimate TiO2 nano semiconductor at a micromolar level. This switch-on fluorescence is suppressed when it is loaded with gold. The strong adsorption of fluorochrome over the surface of nano semiconductor results in the electron transfer between fluorochrome and nano semiconductor. Further, the binding site of nano semiconductor with fluorochrome has been studied theoretically by using the molecular electrostatic potential (MEP). The results show higher electron density at the azomethine nitrogen atom.

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“…ZnO possesses high photoabsorption in the UVA region and UVB regions, which is good for its application as photoinduced antibacterial agents and as a UV protector in cosmetics . Surface functionalization of NPs allows their possible applications in many fields such as dye‐sensitized solar cells, nanomedicine, biosensors, and bionanotechnology . The mechanism of antibacterial action involves ZnO as a metal oxide semiconductor material consisting of a conduction band (CB) and a valance band (VB) with a band gap of 3.3 eV, when UV light falls on the material the electron gets excited from the VB to CB, thus creating holes in the VB and free electrons in the CB.…”

Section: Introductionmentioning

confidence: 99%

Microwave‐assisted synthesis of water‐soluble styrylpyridine dye‐capped zinc oxide nanoparticles for antibacterial applications

Giridhar¹,

Naik

Sudhamani

et al. 2019

J Chinese Chemical Soc

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ZnO nanoparticles were successfully synthesized using a microwave method, whose surface was modified with {4‐[(E)‐2‐(furan‐2‐yl)ethenyl]pyridin‐1‐ium‐1‐yl}acetate as a capping agent (1 and 3%). Their structural properties were investigated using FTIR, XRD, SEM, EDS, and UV–visible spectroscopy. XRD confirmed the Wurtzite structure for all compounds, a size of 30.6 nm for uncapped and 22.9 nm for 3% dye‐capped nanoparticles were calculated from Scherer's equation. Hexagonal wurtzite shape of nanoparticles can be clearly seen in the SEM images. The DFT calculations were carried out using quantum espresso. These dye‐capped ZnO nanoparticles were proved to be potential antibacterial agents, the minimum concentrations of dye‐capped ZnO nanoparticles that inhibit the growth of bacteria are 1.5 mg/mL for Escherichia coli and 0.78 mg/mL for Bacillus subtilis, which are much lower than those of uncapped ZnO. The bioactivity data suggest these organic–inorganic hybrid nanoparticles emerged as a new class of antibacterial agents.

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Switch-On fluorescence and photo-induced electron transfer of 3-aminopropyltriethoxysilane to ZnO: Dual applications in sensors and antibacterial activity

Cited by 57 publications

References 36 publications

The Decoration of ZnO Nanoparticles by Gamma Aminobutyric Acid, Curcumin Derivative and Silver Nanoparticles: Synthesis, Characterization and Antibacterial Evaluation

The Decoration of ZnO Nanoparticles by Gamma Aminobutyric Acid, Curcumin Derivative and Silver Nanoparticles: Synthesis, Characterization and Antibacterial Evaluation

Inhibition of Switch-on Fluorescence of Fluorochrome on Loading TiO2 with Gold

Microwave‐assisted synthesis of water‐soluble styrylpyridine dye‐capped zinc oxide nanoparticles for antibacterial applications

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