![]() ![]() Harisingh Gour University (A Central University), Sagar, India Sagar, Madhya Pradesh, India 172 followers 169 connections Join to. Pushpal Ghosh, Arik Kar and Amitava Patra. Structural Changes and Spectroscopic Properties of Ce3+-Ion-Doped Sodium Yttrium Fluoride Nanocrystals: Influences of Sonication and Temperature. The easy yet highly phase selective green synthesis of the materials promises large scale industrial application in environmentally benign energy efficient lighting.Įlectronic supplementary information (ESI) available. Pushpal Ghosh Assistant Professor at Department of Chemistry, Dr. Pushpal Ghosh, Arik Kar and Amitava Patra. The hexagonal nanomaterial shows a substantial quantum cutting efficiency (154%) whilst in the cubic material, the effect is negligible (107%). To the best of our knowledge, this kind of spontaneous phase transition is not yet reported. In the case of methylimidazolium bromides with longer pendant alkyl chains such as butyl (C 4), octyl (C 8) or decyl (C 10), extremely small nanoparticles of the cubic polymorph form, which then convert even at room temperature (RT) to the thermodynamically favored hexagonal modification. When using Br, hexagonal NaGdF 4 nanoparticles are obtained. de Mello Manoj Kumar Mahata, Ranjit De, Kang Taek Lee Rahul Kumar Sharma, Pushpal Ghosh Hoang Nhu Van. Selective tuning of the shape, morphology and, most importantly, the crystal phase of the host lattice is achieved by changing the alkyl side length, the H-bonding capabilities and the concentration of 1-alkyl-3-methylimidazolium bromide ILs, Br. The easy yet highly phase selective green synthesis of the materials promises large scale industrial application in environmentally benign energy efficient lighting.Oxygen-free Eu 3+-doped NaGdF 4 nanocrystals with high quantum cutting efficiency are accessible at low temperatures (room temperature to 80 ☌) using task-specific ionic liquids (ILs) as structure directing agents and only water as solvent. European Journal of Chemistry Journal article DOI: 10.5155/eurjchem.12.4.482-487.2138 Contributors. Adsorption-Driven Catalytic and Photocatalytic Activity of Phase Tuned In2S3 Nanocrystals Synthesized via Ionic Liquids. Source: Crossref Synthesis and in vitro drug release of primaquine phosphate loaded PLGA nanoparticles. Rahul Kumar Sharma, Yogendra Nath Chouryal, Sushmita Chaudhari, Jeganathan Saravanakumar, Suhash Ranjan Dey, and Pushpal Ghosh. The hexagonal nanomaterial shows a substantial quantum cutting efficiency (154%) whilst in the cubic material, the effect is negligible (107%). Ivanov Sandeep Nigam Archna Pandey Pushpal Ghosh Show more detail. When using Br, hexagonal NaGdF 4 nanoparticles are obtained. Quantum yields are found to be 75% and 42% for doped and core-shell samples, respectively.Oxygen-free Eu 3+-doped NaGdF 4 nanocrystals with high quantum cutting efficiency are accessible at low temperatures (room temperature to 80 ☌) using task-specific ionic liquids (ILs) as structure directing agents and only water as solvent. Energy transfer efficiencies from Ce 3+ to Tb 3+are 65% and 45% for doped Na(Y 1.5Na 0.5)F 6:Ce:Tb material and NaYF 4: Ce/ Tb core-shell materials, respectively. The decay times are found to be 8.4 ms and 5.4 ms for doped nanorods and core-shell nanoparticles, respectively, which reveals that non-radiative decay is higher in the case of core-shell nanoparticles than doped nanorods. Cell volume, cell parameters and lattice strain have been modified due to core-shell structure. The hexagonal crystal phase of Ce 3+-doped sodium yttrium fluoride nanocrystals is converted to the cubic polymorph after surface coating by TbF 3. The core-shell nanoparticles are confirmed by X-ray diffraction study and transmission electron microscopy ( TEM) analysis. Here, we report the preparation of Ce 3+ and Tb 3+ co-doped sodium yttrium fluoride nanorods and NaYF 4: Ce 3+/ Tb 3+ core-shell nanoparticles by the emulsion method. ![]()
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