01517nas 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-002193nas a2200205   4500008004100000022001400041245018100055210006900236260000800305300001600313490000700329520137200336100002601708700001601734700002601750700003101776700002801807700002701835856012501862       2025                        eng d  a0743-746300aPrecursor-dependent heteroatom diversity in luminescent carbon quantum dots: their impact on physicochemical properties and free radical scavenging and antibacterial activities0 aPrecursordependent heteroatom diversity in luminescent carbon qu  cSEP  a24281-242940 v413 a<p>
	The fabrication of a multifunctional carbon quantum dot (CQD) from a novel carbon source is still continuing to be demanding and fascinating. The carbon precursor plays a crucial role in developing any particular properties of a CQD to suit a specific application. In this study, green (Rhus chinensis fruits) as well as chemical-based (ascorbic acid and urea) carbon sources were used for the fabrication of CQDs using a simple, cost-effective, and eco-friendly method. The various physicochemical and optical properties of R. chinensis fruit-derived CQD (CQD-RCF) and urea-assisted ascorbic acid-derived CQD (CQD-AAU) were thoroughly investigated by using multiple characterization techniques such as XRD, TEM, HR-TEM, Raman, XPS, FT-IR, UV-vis, PL, and zeta potential. The synthesized CQDs were screened for antioxidant properties by a DPPH assay and antibacterial activity by the agar tip-well method. Both of these synthesized CQDs exhibited a variety of dissimilarities regarding their heteroatom compositions and surface functional groups, which subsequently led to an enhanced DPPH radical scavenging efficacy of CQD-AAU and a declared antibacterial efficacy of CQD-RCF. Therefore, the outcome of this study shows that the physicochemical properties and functionalities of CQDs are influenced by the chemical composition of the precursor material.</p>
1 aKonwar, Pollab, Mohan1 aDevi, Suman1 aPandey, Satish, Kumar1 aDevi, Khomdram, Sandhyaran1 aDevi, Ayekpam, Bimolini1 aLuwang, Meitram, Niraj  uhttps://library.ncl.res.in/content/precursor-dependent-heteroatom-diversity-luminescent-carbon-quantum-dots-their-impact