A. Rajendrakumar, K. Josephus Alex Libnah, Ch. Aswini, R. V. S. S. N. Ravikumar, N. Arundhathi
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Structural and optical properties of Co2+-doped SrMg2(PO4)2 nanopowder: a new novel NUV LED material
Solid-state reaction method was employed to synthesize Co2+-doped SrMg2(PO4)2 nanopowder and characterized by different techniques to study the structural, morphological, optical, and photoluminescence effects. X-ray diffraction (XRD) analysis revealed that prepared nanopowder structure is monoclinic, and lattice parameters were evaluated. The average crystallite size, micro strain, and dislocation density were calculated and compared with Williamson-Hall method. The morphology of prepared sample was analyzed by SEM images and grain size obtained in nano range. EDS spectrum confirms the presence of desired elements of as prepared sample. The optical and EPR data exhibits distorted octahedral site symmetry of dopant with host material. Photoluminescence (PL) emission spectrum of prepared nanopowder exhibits a single broad band in visible region which represents bright blue color. CIE chromaticity coordinates, and CCT were found from emission spectrum. FTIR spectrum shows vibrational bands related to phosphates, P-O–H, and hydroxyl ions.
期刊介绍：
The objective of the Journal of Nanoparticle Research is to disseminate knowledge of the physical, chemical and biological phenomena and processes in structures that have at least one lengthscale ranging from molecular to approximately 100 nm (or submicron in some situations), and exhibit improved and novel properties that are a direct result of their small size.
Nanoparticle research is a key component of nanoscience, nanoengineering and nanotechnology.
The focus of the Journal is on the specific concepts, properties, phenomena, and processes related to particles, tubes, layers, macromolecules, clusters and other finite structures of the nanoscale size range. Synthesis, assembly, transport, reactivity, and stability of such structures are considered. Development of in-situ and ex-situ instrumentation for characterization of nanoparticles and their interfaces should be based on new principles for probing properties and phenomena not well understood at the nanometer scale. Modeling and simulation may include atom-based quantum mechanics; molecular dynamics; single-particle, multi-body and continuum based models; fractals; other methods suitable for modeling particle synthesis, assembling and interaction processes. Realization and application of systems, structures and devices with novel functions obtained via precursor nanoparticles is emphasized. Approaches may include gas-, liquid-, solid-, and vacuum-based processes, size reduction, chemical- and bio-self assembly. Contributions include utilization of nanoparticle systems for enhancing a phenomenon or process and particle assembling into hierarchical structures, as well as formulation and the administration of drugs. Synergistic approaches originating from different disciplines and technologies, and interaction between the research providers and users in this field, are encouraged.
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