Table 1. Comparison of k/k_f as a Function of Loading Concentration for the PCM Loaded with GNPs and GNPs-UC.

	GNP				GNP-UC
	liquid state (T = 25 °C)		solid state (T = 10 °C)		liquid state (T = 25 °C)		solid state (T = 10 °C)
loading (wt %)	k/kf	error	k/kf	error	k/kf	error	k/kf	error
0.001	1.01	0.02	1.84	0.03	1.00	0.02	1.83	0.03
0.0025	1.03	0.02	1.91	0.03	1.03	0.02	2.06	0.03
0.005	1.04	0.02	2.00	0.03	1.04	0.02	2.06	0.03
0.0075	1.06	0.02	2.07	0.03	1.08	0.02	2.21	0.04
0.01	1.07	0.02	2.11	0.03	1.06	0.02	1.89	0.04