Laser ablation condensation and phase change of Ni1−xCoxO nanoparticles

Reactive deposition of laser ablated FeS1−xparticles on a copper surface

“…[15][16][17], and by laser ablation of bulk elemental solids in the presence of a reactive gas (e.g. oxygen, [18][19][20][21] nitrogen, [22][23][24] carbon monoxide, [25][26][27] hydrocarbon, 28,29 or hydrogen sulde 30 ). All these processes are called reactive laser ablation and yield (in the given order) mixed clusters and nanosized products (e.g.…”

Onset coarsening/coalescence of cobalt oxides in the form of nanoplates versus equi-axed micron particles

“…12 The phase behavior of cobalt oxides via a dynamic laser process was also reported regarding the deposition of Cr 3−δ O 4 spinel particles upon laser heated pedestal growth of Cr:YAG fiber 13 and laser ablation condensation and phase change of Ni 1−x Co x O nanoparticles agglomerated in nanochain aggregates or a more close packed manner due to pulsed radiant heating. 14 Such a radiant heating is presumably up to 1000 • C in order to activate the sintering process of nanoparticles analogous to that suggested for the TiO 2 nanocondensates prepared by gas evaporation. 15 The thermally activated competition of onset sintering and coarsening/coalescence of cobalt oxides, however, remained to be studied more carefully.…”

“…The present experimental results also shed light on the phase behavior of cobalt oxide nanoparticles in a dynamic radiant heating process. 14 …”

(CoxMg1−x)O nanocondensates by pulsed laser ablation of bulk alloy in air

“…As for an alternative clean/dynamic synthesis, PLA of Co target in an oxygen background gas has been used to condense Co 1−x O nanocrystals with cubic shape yet with negligible defect clusters and hydroxylation. 26 Such Co 1−x O nanocrystals tended to coalesce over the cube {100} faces to form nano-chain aggregates or in a closer packed manner. 26 It is not clear if Mg 2+ spiking affects significantly the paracrystal and/or GP zone formation in Co 1−x O protoxide and Co 3−δ O 4 spinel when fabricated as nanocondensates by a PLA route.…”

“…26 Such Co 1−x O nanocrystals tended to coalesce over the cube {100} faces to form nano-chain aggregates or in a closer packed manner. 26 It is not clear if Mg 2+ spiking affects significantly the paracrystal and/or GP zone formation in Co 1−x O protoxide and Co 3−δ O 4 spinel when fabricated as nanocondensates by a PLA route. It is also of interest to characterize the shape of the nanocondensates and hence their (hkl)-specific coalescence to form special grain boundaries.…”