Response to “Comment on ‘Unusual Photoluminescence of CaHfO₃ and SrHfO₃ Nanoparticles’”

One Step Synthesis of Pure Cubic and Monoclinic HfO2 Nanoparticles: Effects of Temperature and Ambient on the Photoluminescent Properties

“…This strongly suggests that adsorbents associated with residual solvents indeed act as non-radiative recombination centers in support to assumptions proposed earlier [13]. On the other hand, the comparison of the present PL results with those obtained earlier from the elongated (85×105nm) monoclinic HfO 2 nanoparticles synthesized using microwave hydrothermal method not involving organic chemicals [14] allows us to exclude the possibility that strong visible PL originates from organic species adsorbed on the surface, as we have clarified recently [15]. It should also be noted that the employed 3.8 eV photon energy is insufficient for excitation of organic species usually exhibiting absorption thresholds in excess of 4.2 eV.…”

ALD Applied to Conformal Rare-Earth Coating of ZnO Nanoparticles for Low Temperature Thermal Imaging Applications

“…XRD measurements performed on oxide metal nanoparticles show that all NPs are highly crystalline, ZnO NPs have the hexagonal wurtzite-analogous (P6 3 mc) crystal structure (a = 3.25 Å and c = 5.20 Å) (15) and the hafnia perovskites SHO and CHO have the cubic perovskite (Pm-3m) structure with the lattice parameters a SHO = 4.06 Å and a CHO = 3.99 Å, respectively. Synchrotron measurements confirmed the presence of the perovskite structure (18). It should be mentioned the presence of cubic (Fm-3m) HfO 2 nanoparticles presence in the hafnia perovskite nanoparticles as secondary phases.…”

“…CaHfO 3 and SrHfO 3 nanoparticles were also embedded into europium and neodymium rare earth thin film and are named Eu_CHO, Nd_CHO, Eu_SHO and Nd_SHO, respectively (See table 1). The complete characterization of the ZnO, CHO and SHO free-standing nanoparticles can be found in refs (15,16,18), respectively.…”