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Table 1
Comparison of results from the two reaction systems and different experimental parameters
Sample No.	Solvent	CuSO₄(mmol/L)	PVP-K30 (mmol/L)	Product	Ascorbic acid/Cu²⁺(mol/mol)	Reaction time	Mean size (nm)
1	Water	0.2	0.5	Cu₂O + Cu	20	6 h	–
2	Water	0.2	0.3	Cu	20	8 h	7 ± 3
3	Water	0.2	0.5	Cu	20	8 h	4 ± 1
4	E.G	0.2	0.3	Cu	8	1 h	6 ± 3
5	E.G	0.2	0.5	Cu	8	1 h	3 ± 1

Yu et al. Nanoscale Research Letters 2009 4:465 doi:10.1186/1556-276X-4-465

Table 1