Table 2. Comparison of Heat Conversion Efficiency of Various Cu_2–xS Nanostructures.

plasmonic nanomaterials	shape	light sources	power density (W/cm2)	efficiency	ref
Cu9S5	plate	980 nm laser	0.51	∼25.7%	(28)
Cu7.2S4	sphere	980 nm laser	0.29	56.7%	(34)
Cu2–xS	sphere	808 nm laser	2.3	16.3%	(29)
CuS	sphere	808 nm laser	1.0	31.4%	(31)
Cu2–xS	sphere	808 nm laser	1.0	27.6%	(30)
Cu2–xS	sphere	1064 nm laser	1.5	30.8%	(30)
Cu9S8	dot	1064 nm laser	1.33	∼49.0%	this work
Cu9S8	dot and short rod	1064 nm laser	1.33	∼45.1%	this work
CuS	nanorod	1064 nm laser	1.33	∼36.6%	this work
CuS	nanorod	1064 nm laser	1.33	∼34.9%	this work