Optical, structural and morphological properties of Fe substituted rutile phase TiO2 nanoparticles

Rathore, Neetu; Kulshreshtha, Asita; Shukla, R. K.; Sharma, Darshan

doi:10.1016/j.physb.2020.412609

Cited by 15 publications

(14 citation statements)

References 40 publications

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“…39 These results confirmed the formation of BiI 3 thin films by a cost-effective and single-step spin coating method. The lattice parameters ( a , b , and c ) and the unit-cell volume ( V ) of BiI 3 films were calculated by using, 40 V = a 2 c ; …”

Section: Resultsmentioning

confidence: 99%

Self-biased photodetector using 2D layered bismuth triiodide (BiI₃) prepared using the spin coating method

et al. 2022

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Section: Resultsmentioning

confidence: 99%

Self-biased photodetector using 2D layered bismuth triiodide (BiI₃) prepared using the spin coating method

et al. 2022

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“…The peak at 424 nm is due to the self-trapped excitons (STE) of the TiO 6 2- octahedron and the recombination of free excitons. This is generated by the lattice localized electron upon the excitation at 320 nm, which captures a hole ( Rathore et al, 2021 ). The emission peak at 468 nm, equivalent to 2.65 eV, is attributed to the surface oxygen vacancies and defects ( Akshay et al, 2019b ; Rathore et al, 2021 ).…”

Section: Resultsmentioning

confidence: 99%

“…This is generated by the lattice localized electron upon the excitation at 320 nm, which captures a hole ( Rathore et al, 2021 ). The emission peak at 468 nm, equivalent to 2.65 eV, is attributed to the surface oxygen vacancies and defects ( Akshay et al, 2019b ; Rathore et al, 2021 ). While the peak at 484 nm is due to the blue-green emission band that is attributed to the de-excitation to acceptor surface defects ( Prajapati et al, 2017 ; Akshay et al, 2019a ), the peak at 491 nm is due to the charge transition associated with oxygen defects ( Choudhury and Choudhury, 2014 ).…”

Section: Resultsmentioning

confidence: 99%

Photoluminescence-Based Bioassay With Cysteamine-Capped TiO2 Nanoparticles for the Selective Recognition of N-Acyl Homoserine Lactones

Vasudevan

Srinivasan

Neelakantan

et al. 2021

Front. Bioeng. Biotechnol.

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Currently available diagnostic procedures for infections are laborious and time-consuming, resulting in a substantial financial burden by increasing morbidity, increased costs of hospitalization, and mortality. Therefore, innovative approaches to design diagnostic biomarkers are imperative to assist in the rapid and sensitive diagnosis of microbial infections. Acyl homoserine lactones (AHLs) are ubiquitous bacterial signaling molecules that are found to be significantly upregulated in infected sites. In this pioneering work, we have developed a simple photoluminescence-based assay using cysteamine-capped titanium oxide (TiO2) nanoparticles for AHL detection. The PL intensity variation of the oxygen defect state of TiO2 was used for the biosensing measurements. The bioassays were validated using two well-studied AHL molecules (C4-HSL and 3-oxo-C12 HSL) of an important human pathogen, Pseudomonas aeruginosa. The developed system has a maximum relative response of 98%. Furthermore, the efficacy of the system in simulated host urine using an artificial urine medium showed a linear detection range of 10–160 nM. Also, we confirmed the relative response and specificity of the system in detecting AHLs produced by P. aeruginosa in a temporal manner.

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“…The interplanar spacing (d) and lattice constants (a and c) were calculated using the Bragg's equation, as discussed in our previous publication 16,20 for tetragonal system. Figure 2A shows the variation of d value and crystallite size with respect to variation in Fe concentration.…”

Section: X-ray Diffractionmentioning

confidence: 99%

Defect‐mediated optical properties of Fe‐substituted TiO₂ nanoparticles

Rathore

Kulshreshtha

Shukla

et al. 2022

Int J Applied Ceramic Tech

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Here, sol-gel derived Fe-TiO 2 anatase nanoparticles with varying concentrations of Ti (1-x) Fe x O 2 (x = 0%, 1%, 5%, 10%) were prepared. The structural, morphological, and optical properties of prepared samples were studied. X-ray diffraction (XRD) patterns show the formation of pure anatase phase. The mean crystallite size of Fe-TiO 2 decreases with increase in the concentration of Fe. Fourier transform infrared spectroscopy (FTIR) spectra confirmed the presence of Ti-O vibrational band for all the samples. In Raman spectrum, peak broadening and red shifting linked with Eg ∼144 cm -1 divulge the Fe substitution at Ti sites into host lattice structure. Photoluminescence (PL) spectra verified nine peaks related to near band-edge emission and various defect states. The UV-vis diffuse reflectance spectra represent redshift and reduction in the bandgap energy. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) investigations show that the size of the grains decreases with increase in Fe doping concentration. The study shows that Fe-doped TiO 2 anatase phase nanoparticles are suitable for photocatalytic activity and solar cell applications.

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Optical, structural and morphological properties of Fe substituted rutile phase TiO2 nanoparticles

Cited by 15 publications

References 40 publications

Self-biased photodetector using 2D layered bismuth triiodide (BiI₃) prepared using the spin coating method

Self-biased photodetector using 2D layered bismuth triiodide (BiI₃) prepared using the spin coating method

Photoluminescence-Based Bioassay With Cysteamine-Capped TiO2 Nanoparticles for the Selective Recognition of N-Acyl Homoserine Lactones

Defect‐mediated optical properties of Fe‐substituted TiO₂ nanoparticles

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Optical, structural and morphological properties of Fe substituted rutile phase TiO2 nanoparticles

Cited by 15 publications

References 40 publications

Self-biased photodetector using 2D layered bismuth triiodide (BiI3) prepared using the spin coating method

Self-biased photodetector using 2D layered bismuth triiodide (BiI3) prepared using the spin coating method

Photoluminescence-Based Bioassay With Cysteamine-Capped TiO2 Nanoparticles for the Selective Recognition of N-Acyl Homoserine Lactones

Defect‐mediated optical properties of Fe‐substituted TiO2 nanoparticles

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Self-biased photodetector using 2D layered bismuth triiodide (BiI₃) prepared using the spin coating method

Self-biased photodetector using 2D layered bismuth triiodide (BiI₃) prepared using the spin coating method

Defect‐mediated optical properties of Fe‐substituted TiO₂ nanoparticles