Physical and optical properties of Dy3+: Li2O–K2O–B2O3 glasses

Azizan, S. A. B.; Hashim, Suhairul; Razak, Nashru Amira; Mhareb, M.H.A.; Alajerami, Y.S.M.; Tamchek, N.

doi:10.1016/j.molstruc.2014.07.032

Cited by 99 publications

(12 citation statements)

References 21 publications

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“…This red shift is due to the reduced electron density on the Ag surface. The extended absorption spectra (800–1200 nm) demonstrates the characteristic nature of Dy in NIR region with the observed electronic transitions 6 F 5/2 , ( 6 F 7/2 – 6 H 5/2 ), and ( 6 F 9/2 – 6 H 7/2 ) at 808, 895, and 1098 nm, respectively . The enhancement in Dy concentration resulted in the accomplishment of a well refined spectra.…”

Section: Resultsmentioning

confidence: 69%

Microwave Synthesis of Chitosan Capped Silver–Dysprosium Bimetallic Nanoparticles: A Potential Nanotheranosis Device

Mishra

Kannan

2016

Langmuir

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Accurate imaging of the structural and functional state of biological targets is a critical task. To amend paucities associated with individual imaging, there is high interest to develop a multifunctional theranostic devices for cancer diagnosis and therapy. Herein, chitosan coated silver/dysprosium bimetallic nanoparticles (BNPs) were synthesized through a green chemistry route and characterization results inferred that the BNPs are crystalline, spherical, and of size ∼10 nm. High-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) and X-ray photoelectron spectroscopy (XPS) confirm the reduced metallic states of Ag and Dy in nanoparticles. These BNPs demonstrate high emission in a second near-infrared (NIR-II, 1000-1400 nm) biological window on excitation at 808 nm. Moreover, magnetization and magnetic resonance imaging (MRI) studies perceive the inherent paramagnetic features of Dy component that displays dark T contrast and high relaxivity. Due to high X-ray attenuation effect, BNPs exhibit better Hounsfield unit (HU) value than the reported contrast agents. BNPs unveil good biocompatibility and also express sturdy therapeutic effect in HeLa cells when tethered with doxorubicin.

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Section: Resultsmentioning

confidence: 69%

Microwave Synthesis of Chitosan Capped Silver–Dysprosium Bimetallic Nanoparticles: A Potential Nanotheranosis Device

Mishra

Kannan

2016

Langmuir

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“…also because a new extrinsic band is formed by Dy on the grid between the boron and oxygen ions. As a consequence, there is an amount of possible reduction in (B-O-B) [36]. indicates that the energy of Urbach decreases with changes in the Dy2O3 concentration.…”

Section: Resultsmentioning

confidence: 99%

Impact of Dy2O3 Substitution on the Physical, Structural and Optical Properties of Lithium–Aluminium–Borate Glass System

et al. 2020

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In this study, a series of Li2O-Al2O3-B2O3 glasses doped with various concentrations of Dy2O3 (where x = 0.0, 0.2, 0.4, 0.6, 0.8, and 1.0 mol%) were prepared by using a conventional melt-quenching technique. The structural, physical and optical properties of the glasses were examined by utilising a variety of techniques instance, X-ray diffraction (XRD), UV–Vis-NIR spectrometer, Fourier transform infrared (FTIR) and photoluminescence (PL). The XRD spectra demonstrate the amorphous phase of all glasses. Furthermore, the UV-vis-NIR spectrometers have registered optical absorption spectra a numbers of peaks which exist at 1703, 1271, 1095, 902, 841, 802, 669, 458, 393 and 352 nm congruous to the transitions from the ground of state (6H15/2) to different excited states, 6H11/2, 6F11/2 + 6H9/2, 6F9/2 + 6H7/2, 6F7/2, 6F5/2, 6F3/2, 4F9/2, 4I15/2, 4F7/2 and 6P7/2, respectively. The spectra of emission exhibit two strong emanation bands at 481 nm and 575 nm in the visible region, which correspond to the transitions 4F9/2 → 6H15/2 and 4F9/2 → 6H13/2. All prepared glass samples doped with Dy2O3 show an increase in the emission intensity with an increase in the concentration of Dy3+. Based on the obtained results, the aforementioned glass samples may have possible applications, such as optical sensor and laser applications.

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“…Higher spectral intensity of hypersensitive transition was due to the higher magnitude of the Columbic attraction between oxygen ligand and Dy 3+ ions. [ 21,22 ]…”

Section: Resultsmentioning

confidence: 99%

Synthesis and mechanoluminescence study of Li₆Y(BO₃)₃:Dy³⁺/Eu³⁺ phosphor

Yawalkar

Nayar

Nayar³

et al. 2020

Luminescence

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Li6Y(BO3)3 phosphor was prepared using solid‐state synthesis by varying europium/dysprosium (Eu/Dy) concentrations in the range 0.05–1.0 mol%. X‐ray diffraction and Fourier transform infrared characterizations provided insight into the phase, crystallinity, morphology and functional groups. Photoluminescence (PL) of the Li6Y(BO3)3:Dy3+ phosphor was also studied. Li6Y(BO3)3:Dy3+ displayed excellent PL due to the characteristic emission of Dy3+ ions in the visible region at 482 nm (4F9/2→6H15/2) and 580 nm (4F9/2→6H13/2,), when excited at 352 nm. The Li6Y(BO3)3:Eu3+ phosphor was discussed in our previous publication. Uniaxial compression experiments on Li6Y(BO3)3 showed that the mechanoluminescence (ML) intensity was linearly dependent on mechanical power. When pressure was applied to these phosphors mixed in an epoxy resin, initially the ML intensity increased with time, attained a peak value Im at a particular time tm, and decreased further with increase in time. After tm, ML intensity decreased exponentially, initially at a faster rate that subsequently slowed down, ML intensity increased linearly for a wide measurement range of dynamic load that made the Li6Y(BO3)3 phosphor a good elastico ML (EML) material to be utilized as a stress sensor with Li6Y(BO3)3:Eu3+ and showing greater ML intensity than Li6Y(BO3)3:Dy3+.

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Physical and optical properties of Dy3+: Li2O–K2O–B2O3 glasses

Cited by 99 publications

References 21 publications

Microwave Synthesis of Chitosan Capped Silver–Dysprosium Bimetallic Nanoparticles: A Potential Nanotheranosis Device

Microwave Synthesis of Chitosan Capped Silver–Dysprosium Bimetallic Nanoparticles: A Potential Nanotheranosis Device

Impact of Dy2O3 Substitution on the Physical, Structural and Optical Properties of Lithium–Aluminium–Borate Glass System

Synthesis and mechanoluminescence study of Li₆Y(BO₃)₃:Dy³⁺/Eu³⁺ phosphor

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Physical and optical properties of Dy3+: Li2O–K2O–B2O3 glasses

Cited by 99 publications

References 21 publications

Microwave Synthesis of Chitosan Capped Silver–Dysprosium Bimetallic Nanoparticles: A Potential Nanotheranosis Device

Microwave Synthesis of Chitosan Capped Silver–Dysprosium Bimetallic Nanoparticles: A Potential Nanotheranosis Device

Impact of Dy2O3 Substitution on the Physical, Structural and Optical Properties of Lithium–Aluminium–Borate Glass System

Synthesis and mechanoluminescence study of Li6Y(BO3)3:Dy3+/Eu3+ phosphor

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Synthesis and mechanoluminescence study of Li₆Y(BO₃)₃:Dy³⁺/Eu³⁺ phosphor