Table 2. TCR % Change per Celsius Degree of the Graphene/NC Composites within Various Temperature Intervals.

		temperature range (°C)
samples	heating rate (°C/min)	140–160 (%)	160–180 (%)	180–200 (%)	200–220 (%)	220–240 (%)	240–260 (%)
NC60@G	2.5	–4.59	–3.56	–4.63	–4.95	–3.05	–2.01
	5	0	–4.73	–3.84	–4.99	–4.03	–2.13
	7.5	0	–4.68	–2.91	–4.70	–4.96	–2.51
NC75@G	2.5	0	0	0	–5.00	–3.85	–2.53
	5	0	0	0	–5.00	–4.29	–2.09
	7.5	0	0	0	–4.98	–4.72	–2.03
NC90@G	2.5	0	0	0	0	–4.93	–3.99
	5	0	0	0	0	–4.87	–4.20
	7.5	0	0	0	0	–4.53	–4.13