Blue shift in optical absorption, magnetism and light-induced superparamagnetism in γ-Fe2O3 nanoparticles formed in dendrimer

Domracheva, N. E.; Vorobeva, V.E.; Груздев, М. С.; Pyataev, A. V.

doi:10.1007/s11051-015-2890-z

Cited by 16 publications

(6 citation statements)

References 19 publications

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“…Increase in absorption tendency of both NPs at high energy band spectrum signifies decreasing size of the NPs. [54] Sizing effect noted for CdS-NPs is the consequence of photon energy generated electron-hole pairs confinement at conductance band of semiconductor NP. [55] Infra-red absorption of CdS-NPs indicates the chemical purity as well as compositional complexity of the synthesised NPs.…”

Section: Characterisation Of Synthesised Nanoparticlesmentioning

confidence: 99%

Effectivity of copper and cadmium sulphide nanoparticles in mitotic and meiotic cells of Nigella sativa L. (black cumin) – can nanoparticles act as mutagenic agents?

Kumbhakar

Datta

Mandal

et al. 2016

Journal of Experimental Nanoscience

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The present investigation deals with wet chemical preparation and characterisation of copper (Cu) and cadmium sulphide (CdS) nanoparticles (NPs) (using UVÀvisible spectra, Fourier transform infra-red scattering, X-ray diffraction, dynamic light scattering, field emission scanning electron microscopy and transmission electron microscopy) and their effectivity on mitotic and meiotic cells of Nigella sativa L. (Ranunculaceae) in comparison to ethyl methanesulphonate (EMS) and gamma irradiations. The objective of the study is to foresee whether Cu-and CdS-NPs can induce similar type of chromosomal aberrations as that of EMS and gamma irradiations, or not. Dry seeds of N. sativa (2n D 12) are exposed to Cu-and CdS-NPs (0.25, 0.50 and 1.0 mg/ml; 3 and 6 h), EMS (0.25, 0.50 and 1.0%; 3 and 6 h) and doses of gamma irradiations (25, 50, 100, 200 and 300 Gy). Cu-NPs (range: 25.7 to 120.4 nm; 33.2 nm § 9.6) and CdS-NPs (range: 29.4 to 115.7 nm; 37.8 nm § 10.7) are both cubical to spherical in shape. NPs are found to induce similar responses as that of the studied conventional mutagens, in relation to physiological and chromosomal (mitotic and meiotic) attributes. Uptake of Cu-and CdS-NPs in seedlings is also studied using atomic absorption spectroscopy. Results suggest that Cu-and CdS-NPs can act as mutagenic agent, a pioneer report of its kind.

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Section: Characterisation Of Synthesised Nanoparticlesmentioning

confidence: 99%

Effectivity of copper and cadmium sulphide nanoparticles in mitotic and meiotic cells of Nigella sativa L. (black cumin) – can nanoparticles act as mutagenic agents?

Kumbhakar

Datta

Mandal

et al. 2016

Journal of Experimental Nanoscience

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“…Due to the quantum size effect, luminescent nanomaterials show unique properties that are different from their bulk counterparts, such as blue shift of absorption bands, size‐dependent luminescence, localized surface plasmon resonance, and significantly enhanced energy transfer efficiency . In addition, with the rapid development of synthetic methodology, luminescent nanomaterials with tunable shape and size can be obtained, and their luminescent properties can be readily tailored by adjusting the chemical composition, crystal structure, morphology, and size .…”

Section: Introductionmentioning

confidence: 99%

Recent Progress in Time‐Resolved Biosensing and Bioimaging Based on Lanthanide‐Doped Nanoparticles

Wang

et al. 2019

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109

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Luminescent nanomaterials have attracted great attention in luminescence‐based bioanalysis due to their abundant optical and tunable surface physicochemical properties. However, luminescent nanomaterials often suffer from serious autofluorescence and light scattering interference when applied to complex biological samples. Time‐resolved luminescence methodology can efficiently eliminate autofluorescence and light scattering interference by collecting the luminescence signal of a long‐lived probe after the background signals decays completely. Lanthanides have a unique [Xe]4fN electronic configuration and ladder‐like energy states, which endow lanthanide‐doped nanoparticles with many desirable optical properties, such as long luminescence lifetimes, large Stokes/anti‐Stokes shifts, and sharp emission bands. Due to their long luminescence lifetimes, lanthanide‐doped nanoparticles are widely used for high‐sensitive biosensing and high‐contrast bioimaging via time‐resolved luminescence methodology. In this review, recent progress in the development of lanthanide‐doped nanoparticles and their application in time‐resolved biosensing and bioimaging are summarized. At the end of this review, the current challenges and perspectives of lanthanide‐doped nanoparticles for time‐resolved bioapplications are discussed.

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“…In our previous works, to create dendritic nanocomposites or DENPs, Domracheva et al [24][25][26] developed a convenient approach according to which, at rst complexes of Fe(III) ions with liquid-crystalline second generation poly(propylene imine) (PPI) dendrimers reduce by N 2 H 2 Fe(III) to Fe(II) then react with NaOH to obtain dendrimer-Fe(OH) 2 intermediates, that nally oxidize to form the target dendrimer-entrapped Fe 2 O 3 NPs. In works of Domracheva and co-authors 30,31 the observation of quantum size effects was described: inuence of the size of the semiconductor g-Fe 2 O 3 NPs on optical properties and inuence of pulsed laser irradiation on superparamagnetic properties of g-Fe 2 O 3 NPs. It was recently described that ve dendritic complexes from the rst to the h generations have been synthesized by complex formation between iron(II) salt and organic dendrimeric ligand.…”

Section: Introductionmentioning

confidence: 99%

Liquid crystalline poly(propylene imine) dendrimer-based iron oxide nanoparticles

et al. 2019

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Blue shift in optical absorption, magnetism and light-induced superparamagnetism in γ-Fe2O3 nanoparticles formed in dendrimer

Cited by 16 publications

References 19 publications

Effectivity of copper and cadmium sulphide nanoparticles in mitotic and meiotic cells of Nigella sativa L. (black cumin) – can nanoparticles act as mutagenic agents?

Effectivity of copper and cadmium sulphide nanoparticles in mitotic and meiotic cells of Nigella sativa L. (black cumin) – can nanoparticles act as mutagenic agents?

Recent Progress in Time‐Resolved Biosensing and Bioimaging Based on Lanthanide‐Doped Nanoparticles

Liquid crystalline poly(propylene imine) dendrimer-based iron oxide nanoparticles

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