Luminescence investigation of red-emitting Sr2MgMoO6:Eu3+ phosphor for visualization of latent fingerprint

Effect of Partial Ca2+ Substitution with Ln3+ (Ln = Y, La) on Luminescence Enhancement of Ca18.62Zn2(PO4)14:0.38Dy3+ White-Emitting Phosphor for White Light-Emitting Diodes

“…Similarly, when Ln = La 3+ (Ca 18.62– x La x Zn 2 ­(PO 4 ) 14 :0.38Dy 3+ ), the diffraction peak shifts toward a smaller angle, deriving from the La 3+ (CN = 8/6, r = 1.16 Å/1.032 Å) ions replacing the Ca 2+ ( r = 1.12 Å/1 Å) lattice position, and some unit cells inside the crystal are expanded. The average grain size can be estimated via the Scherrer equation: where D represents the size of the crystallite, constant θ stands for the diffraction angle, k and λ mean the constant and X-ray wavelength (0.154178 nm), and β is the full-width at half-maximum (in radian). The calculated crystalline grain size of Ca 18.05 Y 0.57 Zn 2 ­(PO 4 ) 14 :0.38Dy 3+ and Ca 17.86 La 0.76 Zn 2 ­(PO 4 ) 14 :0.38Dy 3+ are approximately 61.49 and 66.95 nm, respectively.…”

Interpol review of fingermarks and other body impressions (2019 – 2022)

“…Preliminary/Pilot studies – Several compounds were presented as new dusting powders: AIE-active composites or molecules [ [277] , [278] , [279] , [280] , [281] ], algal biomass [ 282 ], anti-perovskite phosphors [ 283 ], azo-dyes [ 284 ], β-cyclodextrin-berberine complexes [ 285 ], benzazole derivatives [ 286 ], bisamide analogues [ 287 ], cadmium-doped silica microspheres [ 288 ], chitosan-tripolyphosphate-lysine conjugates [ 289 ], coumarin–pyridone conjugates [ 290 ], crushed eggshells and clamshells [ 291 ], crushed gambir [ 292 ], curcumin analogues [ 293 ], doped montmorillonite [ 278 , 294 , 295 ], doped starch microspheres [ [296] , [297] , [298] ], europium-dextrose composites [ 299 ], iron oxide/zinc sulphide hybrid [ 300 ], metal-organic frameworks [ 301 ], organic NIR emitters [ 302 , 303 ], perylenetetracarboxylate compounds [ 304 ], phenylthiazoles [ 305 ], phosphor-cellulose hybrids [ 306 ], pyrazoles [ 307 ], pyrene-tagged imidazolium salts [ 308 ], pyridine and pyrimidine derivatives [ 309 , 310 ], rare-earth-doped phosphors [ [311] , [312] , [313] , [314] , [315] , [316] , [317] , [318] , [319] ], reduced graphene oxides [ 320 ], resveratrol powder [ 321 ], rhodamine B-doped diatomaceous earth [ 322 ], Schiff base complexes [ [323] , [324] , [325] ], talcum powder […”

Effect of Sr2+ ions on the structure, up-conversion emission and thermal sensing of Er3+, Yb3+ co-doped double perovskite Ba(2−x)SrxMgWO6 phosphors

“…7 An ideal double perovskite structure with the general formula A 2 BCO 6 is obtained when the B-site cation is partially replaced by the C-site cation in a 1 : 1 ordered manner in the ideal perovskite structure ABO 3 . In recent years, double perovskite A 2 BCO 6 compounds have been extensively investigated for their unique properties and potential applications, 8 as well as the flexibility to tune the crystal structure by cation substitution. Tungstates have excellent thermal stability and low phonon energy, making them suitable for temperature measurement.…”