01741nas a2200193   4500008004100000022001400041245005600055210005300111260009500164300001000259490000800269520107900277653002201356653001701378653001801395100002001413700002701433856008701460       2015                        eng d  a0022-459600aArsenic detection in water: YPO4:Eu3+ nanoparticles0 aArsenic detection in water YPO4Eu3 nanoparticles  a525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USAbACADEMIC PRESS INC ELSEVIER SCIENCEcDEC  a83-900 v2323 a<p>This work reports on the novel technique of detection of arsenic in aqueous solution utilising the luminescence properties of lanthanide doped nanomaterials. Eu3+ (5%) doped YPO(4)nanorodswere utilised for the said experiment. Co-precipitation method was used for the synthesis of the materials and characterised them with different instrumental techniques like X-ray diffraction (XRD), Infra-red (IR), UV-absorption, scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS) and photoluminescence studies. This nanoparticle can adsorb both arsenic and arsenious acids. We studied the effect of arsenic adsorption on the luminescence behaviour of the nanoparticles. Arsenic acid enhanced the luminescence intensity whereas arsenious acid quenched the luminescence. This luminescence enhancement or quenching is related with arsenic concentration. This relation of luminescence property with concentration of arsenic can be used to detect arsenic in industrial waste. (C) 2015 Elsevier Inc. All rights reserved.</p>10aArsenic detection10aLuminescence10aNanomaterials1 aGhosh, Debasish1 aLuwang, Meitram, Niraj  uhttps://library.ncl.res.in/content/arsenic-detection-water-ypo4eu3-nanoparticles-001670nas a2200157   4500008004100000022001400041245013000055210006900185260011000254300001600364490000600380520094900386100002001335700002701355856013001382       2015                        eng d  a2046-206900aOne-pot synthesis of 2-thenoyltrifluoroacetone surface functionalised SrF2:Eu3+ nanoparticles: trace level detection of water0 aOnepot synthesis of 2thenoyltrifluoroacetone surface functionali  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcMAY  a47131-471390 v53 a<p>This work reports the one pot synthesis of 2-thenoyltrifluoroacetone (TTA) surface functionalised SrF2:Eu3+ nanoparticles. The nanoparticles were characterised by X-ray diffraction (XRD), infra-red (IR), UV-absorption, transmission electron microscopy (TEM), and photoluminescence studies. Sensitization of Eu3+ ion by TTA in SrF2 nanoparticle matrix gives an enhanced luminescence in dry aprotic solvents like tetrahydrofuran (THF), acetonitrile (AN), dichloromethane (DCM) etc. We studied the effect of trace quantity of water on luminescence of the particles in THF solvent. Even a trace level of water content in the solvent is able to quench the luminescence significantly and quenching enhances with addition of more and more water. This approach of luminescence quenching strategy of detecting a minute trace level of water molecules has a potential application in the estimation of water in various dry organic solvents like THF.</p>1 aGhosh, Debasish1 aLuwang, Meitram, Niraj  uhttps://library.ncl.res.in/content/one-pot-synthesis-2-thenoyltrifluoroacetone-surface-functionalised-srf2eu3-nanoparticles-001517nas a2200157   4500008004100000022001400041245013300055210006900188260011000257300001600367490000600383520080000389100002001189700002701209856012301236       2015                        eng d  a2046-206900ap-Aminobenzoic acid (pABA) sensitization of LaF3:Tb3+ nanoparticles and its applications in the detection of explosive materials0 apAminobenzoic acid pABA sensitization of LaF3Tb3 nanoparticles a  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcJAN  a10468-104780 v53 a<p>This work reports the utilization of water dispersible terbium (Tb3+) doped spherical LaF3 nanoparticles (similar to 5 nm) surface functionalised with p-aminobenzoic acid (pABA) for the detection of aromatic nitro explosives. The functionalised nanoparticles show remarkable sensitivity to a number of highly electron deficient aromatic nitro compounds like picric acid (PA), 2,4,6-trinitrotoluene (TNT), 2,4-dinitrotoluene (2,4-DNT), 2,4-dinitrophenol (2,4-DNP) etc. All of these nitro compounds can be detected easily at ppm level using this luminescence quenching technique whereas in the case of TNT it can detect concentrations as low as 50 ppb. This novel approach of utilising the Tb3+ doped NPs sensitised by pABA has potential application in the detection of explosive materials.</p>1 aGhosh, Debasish1 aLuwang, Meitram, Niraj  uhttps://library.ncl.res.in/content/p-aminobenzoic-acid-paba-sensitization-laf3tb3-nanoparticles-and-its-applications-001687nas a2200217   4500008004100000022001400041245010600055210006900161260007300230300000800303490000800311520089100319653001401210653001701224653001801241653001401259653001801273100002001291700002701311856013101338       2016                        eng d  a0022-231300aSelective detection of Fe3+, Cr3+ and Cu2+ in water using highly luminescent Gd2O3:Eu3+ nanoparticles0 aSelective detection of Fe3 Cr3 and Cu2 in water using highly lum  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcMAR  a1-80 v1713 a<p>Rod shaped Eu3+ doped Gd2O3 nanoparticles were synthesised by a simple wet-chemical method followed by high temperature heating at 700 degrees C. The nanoparticles were characterised by X-ray diffraction (XRD), infra-red (IR), transmission electron microscopy (TEM), x-ray photonelectron spectroscopy (XPS), photoluminescence (PL) studies and lifetime measurement. The particles show strong host sensitised luminescence in water. Luminescence in water is selectively quenched by Fe3+, Cr3+ and Cu2+ ions. This luminescence quenching phenomenon has been utilised to detect metal ions in synthetic water and environmental water samples. Results obtained by luminescence quenching for environmental water samples are in good agreement with the results obtained from inductively coupled plasma atomic emission spectroscopy (ICP-AES) study. (C) 2015 Elsevier B.V. All rights reserved.</p>10aDetection10aLuminescence10aNanoparticles10aQuenching10aSensitization1 aGhosh, Debasish1 aLuwang, Meitram, Niraj  uhttps://library.ncl.res.in/content/selective-detection-fe3-cr3-and-cu2-water-using-highly-luminescent-gd2o3eu3-nanoparticles-0