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Exploring one material for dual applications:A red-emitting Mg_(2)GeO_(4):Eu^(3+)nanophosphor for future generation energy efficient WLEDs and dosimetric applications

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Journal of Rare Earths 2024年第10期42卷 1835-1845页

作者： Akshay Arjun G.P.Darshan S.C.Sharma H.Nagabhushana D.V.Sunitha H.B.Premkumar Department of Physics Faculty of Mathematical and Physical SciencesM.S.Ramaiah University of Applied SciencesBengaluru560054India honorary professor of law and forensic materials Jain UniversityBengaluru560069India C.N.R.Rao Centre for Advanced materials Tumkur UniversityTumkur572103India School of Applied Sciences(Physics) REVA UniversityBengaluru560064India

The envisaged design and developme nt of individual mate rials to excavate a broader spectrum of desired properties and offer multiple applications are highly *** this in mind,a series of forsterite-structured Mg_(2)GeO_(4):Eu^(3+)(1 mol%-9 mol%)nanophosphors was synthesized via a solution combustion method using oxalyl dihydrazide as a *** X-ray diffraction patterns confirm the orthorhombic crystal system with a Puma space *** results clearly show irregularly shaped cluster-like structures with aggregation of the *** diffuse reflectance spectra,the optical energy band gap of the Mg_(2)GeO_(4):Eu^(3+)(1 mol%-9 mol%)nanophosphors was estimated and obtained to be~4.12-4.32 *** photoluminescence emission spectra exhibit intense peaks at^(5)79,589,610,661,and 707 nm,which are due to characteristic^(5)D_(0)→^(7)F_(0),^(5)D_(0)→^(7)F_(1),^(5)Do→^(7)F_(2),^(5)D_(0)→^(7)F_(3)and^(5)D_(0)→^(7)F_(4)transitions of Eu^(3+)ions,*** Commission International de L'Eclairage color coordinates are gradually tuned from pale red(0.5980,0.4012)to a pure red(0.6385,0.3611)*** glow peaks showcase excellent super-linear response at low doses ofγ-irradiations,indicating that the prepared phosphor can be used in thermoluminescent personal dosimetry which is a biological tissue *** aforementioned results demonstrate that the prepared Mg_(2)GeO_(4):Eu^(3+)(1 mol%-9 mol%)nanophosphors are considered an excellent candidate for dual applications,i.e.,red component in future generation white-light-emitting diodes(WLEDs)and personal dosimetric applications.

关键词： Nanophosphors Photoluminescence Thermoluminescence Dosimetry Photometric properties Rare earths

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Extending Electromagnetic Treatment to Infectious Diseases including the Ebola Virus

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Journal of Biomaterials and Nanobiotechnology 2015年第2期6卷 100-115页

作者： Edgar E. Escultura Research professor (honorary) GVP-Professor V. Lakshmikantham Institute for Advanced Studies GVP College of Engineering JNT University Kakinada Vishakhapatnam India

A blueprint for research and development for design and development of suitable electromagnetic treatment of genetic diseases (Escultura, Journal of Biomaterials and Nanobiotechnology, 3(2), 2012) known as genetic sterilization is applied to infectious diseases including viruses. It is based on the Grand Unified Theory (Escultura, Nonlinear Analysis, A-Series, 69(3), 2008) and the Unified Theory of Evolution (Escultura, The Journal of the Science of Healing Outcomes, 2015). Since every physical characteristic of living thing is determined by a gene, so is the undesirable symptom of a disease. For virus, its undesirable symptom is determined principally by the wavelength of the natural vibration of its gene as sequence of base materials which is equal to its measure as a segment of a double helix. Radiation with wavelength equal to this measure will resonate with it. Raising its intensity suitably will sterilize the gene, stop its spread and render it harmless to the host;then the disease is treated without harm to normal cells. Another treatment is establishing resonance with radiation of wavelength equal to the measure of the virus (protein strand with the gene) across;raising its intensity suitably will burn the virus without side effect (since it is much smaller than normal cells).

关键词： Basic Primum Genetic Activation and Sterilization Resonance and Superposition law Superstring

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