Green Fabrication of Copper Nanoparticles Dispersed in Walnut Oil Using Laser Ablation Technique

Table 1

The pertinent parameters of pure walnut oil and copper nanofluid.

Sample	Concentration of; Cu-NPs (ppm)	Volume fraction; (×10^−5)	Average particle; size (nm)	Real part of; refractive index ()	Imaginary part of; refractive index ()	Resonance; angle ()	Reflectance
Pure walnut oil	—	—	—	1.4691	0.002	62.819°	0.0362
5 min	2.3	0.0257	25	1.4691	0.008	62.854°	0.0905
10 min	3.8	0.0424	17	1.4690	0.012	62.874°	0.1278
20 min	10.2	0.1138	15	1.4688	0.026	62.966°	0.2437
30 min	33.4	0.3728	11	1.4686	0.032	62.995°	0.2846
50 min	112.6	1.26	4.01	1.4682	0.043	63.042°	0.3455