Characterization and Optical Studies of Hydroxyethyl Cellulose-Copper Oxide Nanocomposites

Table 3

Values of optical band gap (E_opt), number of carbon atoms (M) per carbonaceous cluster, and refractive index (n_o) for CuONPs-doped HEC samples.

Sample	Eopt (eV)	M	no
S0	5.40	̴40	1.44
S4	5.10	̴44	1.47
S6	5.30	̴43	1.38
S8	5.20	̴44	1.40