CuGaS2 hollow spheres from Ga-CuS core-shell nanoparticles

Ji Hyun Cha; Duk Young Jung

doi:10.1016/j.ultsonch.2013.12.004

CuGaS₂ hollow spheres from Ga-CuS core-shell nanoparticles

Ji Hyun Cha
, Duk Young Jung

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

A liquid gallium emulsion was prepared as a starting material using ultrasound treatment in ethylene glycol. Core-shell particles of Ga@CuS were successfully synthesized by deposition of a CuS layer on gallium droplets through sonochemical deposition of copper ions and thiourea in an alcohol media. The core and shell of Ga@CuS products were composed of amorphous gallium metal and covellite phase CuS, which transformed into chalcopyrite CuGaS₂ hollow spheres after sulfurization at 450 C, which was the lowest crystallization temperature. The formation of hollow nanostructures was ascribed to the Kirkendall mechanism, in which liquid gallium particles play an important role as reactive templates. In conclusion, we obtained CuGaS ₂ hollow spheres with a 430 nm outer diameter and 120 nm shell thickness that had the same crystal structure and electrical properties as bulk CuGaS₂.

Original language	English
Pages (from-to)	1194-1199
Number of pages	6
Journal	Ultrasonics Sonochemistry
Volume	21
Issue number	3
DOIs	https://doi.org/10.1016/j.ultsonch.2013.12.004
Publication status	Published - May 2014

Keywords

Core-shell nanoparticles
Gallium colloidal
Hollow sphere
Kirkendall effect
Ultrasound synthesis

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10.1016/j.ultsonch.2013.12.004

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title = "CuGaS2 hollow spheres from Ga-CuS core-shell nanoparticles",

abstract = "A liquid gallium emulsion was prepared as a starting material using ultrasound treatment in ethylene glycol. Core-shell particles of Ga@CuS were successfully synthesized by deposition of a CuS layer on gallium droplets through sonochemical deposition of copper ions and thiourea in an alcohol media. The core and shell of Ga@CuS products were composed of amorphous gallium metal and covellite phase CuS, which transformed into chalcopyrite CuGaS2 hollow spheres after sulfurization at 450 C, which was the lowest crystallization temperature. The formation of hollow nanostructures was ascribed to the Kirkendall mechanism, in which liquid gallium particles play an important role as reactive templates. In conclusion, we obtained CuGaS 2 hollow spheres with a 430 nm outer diameter and 120 nm shell thickness that had the same crystal structure and electrical properties as bulk CuGaS2.",

keywords = "Core-shell nanoparticles, Gallium colloidal, Hollow sphere, Kirkendall effect, Ultrasound synthesis",

author = "Cha, \{Ji Hyun\} and Jung, \{Duk Young\}",

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doi = "10.1016/j.ultsonch.2013.12.004",

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volume = "21",

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journal = "Ultrasonics Sonochemistry",

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publisher = "Elsevier B.V.",

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TY - JOUR

T1 - CuGaS2 hollow spheres from Ga-CuS core-shell nanoparticles

AU - Cha, Ji Hyun

AU - Jung, Duk Young

PY - 2014/5

Y1 - 2014/5

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AB - A liquid gallium emulsion was prepared as a starting material using ultrasound treatment in ethylene glycol. Core-shell particles of Ga@CuS were successfully synthesized by deposition of a CuS layer on gallium droplets through sonochemical deposition of copper ions and thiourea in an alcohol media. The core and shell of Ga@CuS products were composed of amorphous gallium metal and covellite phase CuS, which transformed into chalcopyrite CuGaS2 hollow spheres after sulfurization at 450 C, which was the lowest crystallization temperature. The formation of hollow nanostructures was ascribed to the Kirkendall mechanism, in which liquid gallium particles play an important role as reactive templates. In conclusion, we obtained CuGaS 2 hollow spheres with a 430 nm outer diameter and 120 nm shell thickness that had the same crystal structure and electrical properties as bulk CuGaS2.

KW - Core-shell nanoparticles

KW - Gallium colloidal

KW - Hollow sphere

KW - Kirkendall effect

KW - Ultrasound synthesis

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U2 - 10.1016/j.ultsonch.2013.12.004

DO - 10.1016/j.ultsonch.2013.12.004

M3 - Article

AN - SCOPUS:84895071833

SN - 1350-4177

VL - 21

SP - 1194

EP - 1199

JO - Ultrasonics Sonochemistry

JF - Ultrasonics Sonochemistry

IS - 3

ER -

CuGaS₂ hollow spheres from Ga-CuS core-shell nanoparticles

Abstract

Keywords

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