2017
DOI: 10.1142/s1793292017500308
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Synthesis and Characterization of Pb@GaS Core–Shell Fullerene-Like Nanoparticles and Nanotubes

Abstract: New types of core-shell nanoparticles are reported: Pb@GaS fullerene-like and nanotubular structures, achieved via the continuously high reactor temperatures and ultra-hot stronggradient annealing environments created by highly concentrated sunlight. Structural and chemical characterizations suggest a formation mechanism where vaporized Pb condenses into nanoparticles that are stabilized as they become covered by molten GaS, the ensuing crystallization of which creates the outer layers. Hollow-core GaS fullere… Show more

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Cited by 6 publications
(4 citation statements)
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“…90 GaS nanotubes were also synthesized by solar ablation in the presence of lead as growth promoter. 91 Liquid gallium and lead are miscible at temperatures above 600 °C, but upon cooling they segregate into Ga-rich and Pb-rich phases. Once the leadrich phase solidified in a cylindrical rod-shape (around 300 °C), the gallium-rich phase reacted with the sulphur vapour forming the cylindrical contour of the GaS nanotube engulfing the Ga nanowire.…”
Section: Catalytic Growthmentioning
confidence: 99%
“…90 GaS nanotubes were also synthesized by solar ablation in the presence of lead as growth promoter. 91 Liquid gallium and lead are miscible at temperatures above 600 °C, but upon cooling they segregate into Ga-rich and Pb-rich phases. Once the leadrich phase solidified in a cylindrical rod-shape (around 300 °C), the gallium-rich phase reacted with the sulphur vapour forming the cylindrical contour of the GaS nanotube engulfing the Ga nanowire.…”
Section: Catalytic Growthmentioning
confidence: 99%
“…More recently, core–shell nanotubes and fullerene-like structures of Pb@GaS were obtained via solar ablation of the mixed powder. 22 In this work, GaS layers wrapped the Pb nanotemplate conformably, producing such intriguing nanostructures. In contrast to these cases, no lead was found within or in the vicinity of the IF/INT MoS 2 /WS 2 nanostructures produced via the laser ablation approach presented here.…”
Section: Discussionmentioning
confidence: 83%
“…Further irradiation of the nanowhiskers in the presence of the chalcogenide vapor leads to back-conversion of the metal oxide into MX 2 nanotubes. More recently, core–shell nanotubes and fullerene-like structures of Pb@GaS were obtained via solar ablation of the mixed powder . In this work, GaS layers wrapped the Pb nanotemplate conformably, producing such intriguing nanostructures.…”
Section: Discussionmentioning
confidence: 87%
“…Further irradiation of the nanowhiskers in the presence of the chalcogenide vapor lead to back-conversion of the metal oxide into MX 2 nanotubes. More recently, core-shell nanotubes and fullerene-like structures of Pb@GaS were obtained via solar ablation of the mixed powder 311 . In this work, GaS layers wrapped the Pb nano-template conformably producing such intriguing nanostructures.…”
Section: Resultsmentioning
confidence: 99%