12/10/2023 0 Comments Spectra 9 way![]() Gupta, Spectroscopic characterization and luminescence study of zinc aluminate nanocrystals prepared by microwave combustion method using natural black pepper as combustion agent. Thakur, Activation of multiple defects in zinc aluminate through gamma and UV irradiation. ![]() Rani, Annealing effect on the structural, optical and thermoluminescent properties of ZnAl 2O 4: Cr 3+. Kher, Studies on thermoluminescence (TL) from BaAl 2O 4: Dy phosphor. Dhoble, Investigation of thermoluminescence and electron-vibrational interaction parameters in SrAl 2O 4: Eu 2+, Dy 3+ phosphors. Zhu, Synthesis, photoluminescence, thermoluminescence and electron spin resonance investigations of CaAl 12O 19: Eu phosphor. Yang, Irradiation synthesis and characterization of CoAl 2O 4: ce and Mn co-doped CoAl 2O 4: ce phosphors. Thakur, Enhanced near-infrared luminescence in zinc aluminate bestowed by fuel-blended combustion approach. Pitale, Luminescent properties and X-ray photoelectron spectroscopy study of ZnAl 2O 4:Ce 3+, Tb 3+ phosphor. Cordaro, Optical properties of zinc aluminate, zinc gallate, and zinc aluminogallate spinels. Raudsepp, Bright white light through up-conversion of a single NIR source from sol–gel-derived thin film made with ln 3+-doped laf3 nanoparticles. Huy, Single-phase red-emitting ZnAl 2O 4: Cr 3+ phosphor for application in plant growth LEDs. Pandey, Electronic structure of spinel oxides: zinc aluminate and zinc gallate. Grozescu, Hydrothermal synthesis of ZnAl 2O 4: Cr 3+ nanocrystals. Ntwaeaborwa, Luminescence properties of Ce 3+ and Tb 3+ co-activated ZnAl 2O 4 phosphor. The study suggested potential applications of synthesized annealed zinc aluminate phosphor in nano size regime with high colour purity and warm light emission as efficient luminescent material for solid-state lighting and dosimetry applications. The 2nd order kinetics is followed by the samples. The TL mechanism is discussed by calculating activation energy, trap depth and other kinetic parameters. In addition, glow curve peak is shifted to lower temperature side with irradiation time. With longer irradiation time, peak was enhanced and maximum intensity was found for 20 min exposure time. The thermoluminescence (TL) glow curve exhibits only a peak at 422 K for annealed samples. Further, the thermoluminescence behaviour of prepared zinc aluminate spinel nanophosphor was studied after ultraviolet irradiation at different radiation exposure time (5–25 min). The Commission Internationale de l’Eclairage (CIE) co-ordinates, CCT (co-related colour temperature), and 98% colour purity of annealed samples was found. PL and TRPL spectra revealed intense blue emission at ~ 440 nm with 1.34 ms lifetime of annealed zinc aluminate phosphor at 1100 ☌. UV–visible absorption spectra revealed the involvement of transition bands corresponding to oxygen 2 p orbitals, zinc 4 s and aluminium 3 s orbitals. FT-IR spectra presented formation of pure zinc aluminate spinel and presence of Al–Zn, Al–O, and Zn–O bonds. The PXRD and Rietveld analysis showed formation of pure zinc aluminate with Fd-3 m space group with average crystallite size ~ 22 nm. The samples were characterized by powder X-ray diffraction (PXRD), Fourier Transform Infra-red (FT-IR), UV–visible absorption, photoluminescence (PL), Time resolved photoluminescence spectroscopy (TRPL), and thermoluminescence (TL). Enjoy multiple massage modes to make pumping a more natural part of the nursing process.The paper is focused on the structural, optoelectronic properties, and thermoluminescence behaviour of annealed zinc aluminate nanophosphor prepared by green synthesis. Like all Spectra® pumps, the 9 Plus is hospital strength with a true closed system, creating a hygienic barrier between outside contaminants and breastmilk. The built-in rechargeable battery makes it easy for pumping at home or work. Perfect for travel, and weighing only 1/2lb, this small and discreet powerhouse is full of unique features. The Spectra® 9 Plus Portable Rechargeable double electric breast pump is ideal for moms seeking portability and performance.
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