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Copper Sulfide Dendrites Prepared by Sulfur Gas Heat Treatment of Copper
Author(s) -
Gotoh Tamihiro
Publication year - 2017
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201700621
Subject(s) - copper , copper sulfide , scanning electron microscope , sulfur , sulfide , optical microscope , spectroscopy , materials science , analytical chemistry (journal) , band gap , photoluminescence , chemistry , metallurgy , composite material , optoelectronics , organic chemistry , physics , quantum mechanics
The structural and optical properties of copper sulfide dendrites are investigated. Copper sulfide dendrites are prepared by a simple heat treatment of copper. Dendrite growth is remarkable under the condition of copper plate 84.8 mg and sulfur 9.3 mg, and growth temperature at 400 °C. High density tree‐like dendritic structures are observed by optical microscope and scanning electron microscopy (SEM). X‐ray diffraction (XRD) revealed the product to be a mixture of Cu x S ( x = 1.8–2). The band gap of copper sulfide dendrites is estimated using photothermal spectroscopy and photoluminescence spectroscopy at room temperature. Both methods lead to comparable values of ≈1.2 eV. This value is reasonable for the band gap of Cu 2 S.