Abstract
Highly crystalline, phase pure Cu3P nanocrystals (NCs) have been successfully synthesized using ionic liquid-assisted solvothermal method at relatively low temperature (200 °C). Herein, ionic liquids (ILs) are used as a structure directing/templating agent. Effect of ILs and precursor concentration on crystal phase, crystallite size, lattice strain, morphology and grain size of Cu3P NCs is studied. In the presence of IL, crystallite size and lattice strain significantly change with changing the concentration of red phosphorus. For example, smaller crystallite size (38.5 nm) and compressive lattice strain are obtained when 10 times of red phosphorous is used. However, bigger size (41.9 nm) and tensile lattice strains are obtained for the lower concentration of phosphorous (5 times). At higher phosphorus concentration, hexagonal shaped micro-crystals with prominent grain are observed. HRTEM images reveal that spherical-shaped particles on further agglomeration through Ostwald ripening process form hexagonal-shaped bigger microstructures. However, on doping the rare-earth ions (RE3+ = Ce3+/Tb3+) in the Cu3P NCs show the green luminescence (at 542 nm) which is attributed to the emission of Tb3+ ions. To the best of our knowledge, this is the first report on rare-earth doped Cu3P nanoparticles and shows promise on the luminescence aspect of Cu3P nanomaterials along with its already existing plasmonic and semiconducting properties.
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Acknowledgements
The authors would like to acknowledge for financial support from the Science and Engineering Research Board (SERB) and Board of Research in Nuclear Sciences (BRNS), Government of India. The authors acknowledge Sophisticated Instrumentation Centre (SIC) for SEM, and Department of Chemistry for PXRD analysis. The authors also acknowledge the AIIMS New Delhi for TEM characterization support from PURSE programme sanctioned by Department of Science and Technology (DST), Govt of India.
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CHOURYAL, Y.N., SHARMA, R.K., ACHARJEE, D. et al. Influence of ionic liquids and concentration of red phosphorous on luminescent Cu3P nanocrystals. J Chem Sci 131, 93 (2019). https://doi.org/10.1007/s12039-019-1665-y
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DOI: https://doi.org/10.1007/s12039-019-1665-y