| http://www.w3.org/ns/prov#value | - ry parts of nonlinear susceptibility, but also the sign of the real part [18,19].A large number of papers have been published on the synthesis and characterization of CNT and PPy nanocomposite films [20,21] but to our knowledge there are a few reports on the nonlinear optical properties of the PPy/CNT nanocomposite. 2.
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