Enhancement of Fluorescence of Nanosized ZnO: SiO2 Films in the Presence of Human Serum Albumin

Nagovitsyn, I. A.; Chudinova, G. K.; Лобанов, А. В.; Boruleva, E. A.; Мошников, В. А.; Nalimova, S. S.; Kononova, I. E.

doi:10.1134/s1990793118040292

Cited by 5 publications

(5 citation statements)

References 24 publications

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“…Note that the surface structure between the linear structures ('strands') (figure 3(C)) is similar to that previously observed by the atomic force microscopy method for ZnO:SiO 2 structures; the surface of the latter was formed by elliptic and oblong submicron-scale structures with a total mean quadratic roughness of 15-23 nm [18].…”

Section: Resultssupporting

confidence: 81%

“…The UVL band is located in the region of approximately 350-360 nm, and the position of the band maximum depends on the size of the nanostructures, their composition and the influence of medium characteristics, including macromolecules adsorbed on the surface. The formation of the UVL band is explained by the recombination of excitons; its width can be increased due to the presence of impurities that determine the formation of a variety of excitons with slightly different binding energies [14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

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Optical properties of Gd³⁺-doped ZnO:SiO₂ thin films

et al. 2019

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For the first time Gd3+-doped (0.4–0.9 mass.%) ZnO:SiO2 composite films were obtained using the sol-gel method. Optical properties of the films and their structures were studied by absorption and fluorescence spectroscopy and scanning electron microscopy (SEM). The obtained SEM images suggest that the surface morphology of the films does not change qualitatively. However, it was found that doping with Gd3+ ions leads to a significant increase in the ultraviolet luminescence (UVL) of ZnO in ZnO:SiO2 composite by 2.9–3.4 times (λem = 364 nm), which is accompanied by an increase in the band gap of Gd3+-doped films compared with non-doped films.

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Section: Resultssupporting

confidence: 81%

Section: Introductionmentioning

confidence: 99%

Optical properties of Gd³⁺-doped ZnO:SiO₂ thin films

et al. 2019

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“…Besides AB and enzymes, other biorecognition biomolecules have been employed in ZnO PL-based biosensors [128][129][130][131]. In 2020, Vasudevan et al [129] used ZnO nanoparticles functionalized with cysteamine (Cys) for the detection of N-acyl homoserine lactone (AHL).…”

Section: Other Receptorsmentioning

confidence: 99%

ZnO Transducers for Photoluminescence-Based Biosensors: A Review

et al. 2022

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Zinc oxide (ZnO) is a wide bandgap semiconductor material that has been widely explored for countless applications, including in biosensing. Among its interesting properties, its remarkable photoluminescence (PL), which typically exhibits an intense signal at room temperature (RT), arises as an extremely appealing alternative transduction approach due to the high sensitivity of its surface properties, providing high sensitivity and selectivity to the sensors relying on luminescence output. Therefore, even though not widely explored, in recent years some studies have been devoted to the use of the PL features of ZnO as an optical transducer for detection and quantification of specific analytes. Hence, in the present paper, we revised the works that have been published in the last few years concerning the use of ZnO nanostructures as the transducer element in different types of PL-based biosensors, namely enzymatic and immunosensors, towards the detection of analytes relevant for health and environment, like antibiotics, glucose, bacteria, virus or even tumor biomarkers. A comprehensive discussion on the possible physical mechanisms that rule the optical sensing response is also provided, as well as a warning regarding the effect that the buffer solution may play on the sensing experiments, as it was seen that the use of phosphate-containing solutions significantly affects the stability of the ZnO nanostructures, which may conduct to misleading interpretations of the sensing results and unreliable conclusions.

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“…Molecular optical spectroscopy [1] (infrared (IR) absorption spectroscopy [2,3], photoluminescence [4,5], Raman spectroscopy [6,7], terahertz spectroscopy [8], and diffuse scattering spectroscopy [9,10]) is powerful and a generally accepted method for studying the structure and composition of chemical compounds. The method of IR Fourier (FTIR) spectroscopy is the most common method for studying substances in the gas phase both under laboratory and natural conditions [11].…”

Section: Introductionmentioning

confidence: 99%

Temperature Dependence of the Sensitivity of an Infrared Fourier Spectrometer

Fufurin

Shlygin²,

Pozvonkov³

et al. 2021

Russ. J. Phys. Chem. B

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The analytical dependence of the signal-to-noise ratio (SNR) of the measured interferograms of an infrared (IR) Fourier spectrometer on the temperature contrast of the observation path and on the physicochemical properties of the test substance is obtained. The analytical dependences of the minimum detectable concentration of a substance on the value of the temperature contrast are obtained. It is shown experimentally that the theoretical estimates of the minimum detectable concentrations with an accuracy of the order of the mean square error correspond to the experimental values. The obtained analytical dependences make it possible for the given physicochemical properties of substances, the parameters of the IR Fourier spectrometer, and the values of the temperature contrast to estimate minimum detectable concentration of the substance.

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Enhancement of Fluorescence of Nanosized ZnO: SiO2 Films in the Presence of Human Serum Albumin

Cited by 5 publications

References 24 publications

Optical properties of Gd³⁺-doped ZnO:SiO₂ thin films

Optical properties of Gd³⁺-doped ZnO:SiO₂ thin films

ZnO Transducers for Photoluminescence-Based Biosensors: A Review

Temperature Dependence of the Sensitivity of an Infrared Fourier Spectrometer

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Enhancement of Fluorescence of Nanosized ZnO: SiO2 Films in the Presence of Human Serum Albumin

Cited by 5 publications

References 24 publications

Optical properties of Gd3+-doped ZnO:SiO2 thin films

Optical properties of Gd3+-doped ZnO:SiO2 thin films

ZnO Transducers for Photoluminescence-Based Biosensors: A Review

Temperature Dependence of the Sensitivity of an Infrared Fourier Spectrometer

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Product

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Optical properties of Gd³⁺-doped ZnO:SiO₂ thin films

Optical properties of Gd³⁺-doped ZnO:SiO₂ thin films