A High-Yield Synthesis of Chalcopyrite CuInS_𝟐 Nanoparticles with Exceptional Size Control

Table 1

Percent yields of nanoparticles by ICP-OES prepared by increasing reaction temperature.

Entry*	Reaction Temp.	Mass of isolated NP**	NP and pacifying agent***	Result from ICP		Cu : In ratio		ICP corrected yield of CIS
				Cu	In
	^∘C	mg	mg	mg	mg	ICP	EDS	%
1	100	340	10.60	1.44	2.59	1.01	1.08	63.8±4.6
2	120	292	10.21	1.58	2.82	1.01	1.03	65.0±2.0
3	140	273	10.07	2.02	3.41	1.07	1.13	77.0±2.4
4	160	267	10.21	2.36	3.75	1.14	1.18	85.4±3.9
5	180	257	10.30	2.44	3.91	1.13	1.21	83.6±4.4
6	200	243	10.90	3.01	5.06	1.08	1.05	94.8±3.6

∗Reaction condition: using 1.00 g SSP 1, 8.00 mL solvent, and 0.60 mL HSCH₂CH₂SH at 105 minutes.
∗∗Isolated mass of nanoparticle from 1 g of SSP 1 plus the pacifying agent (1,2-ethanedithiol).
∗∗∗Quantities of NPs used for ICP-OES analysis.