ABSTRACT
Nanocarbons are wondrous materials. Imprinting them in a specific format could transform them as a left-handed medium (LHM). Typically, iron-incorporated nanocarbons are observed to be a Veselago medium when transmuted into split-ring resonators (SRRs). This chapter presents SRR characteristics of ferro-nanocarbon (FNC) revealing dielectric and ferro-electric anisotropy. Modelling and simulations on FNC SRRs are presented in light of Nicolson–Ross–Weir and retrieval scalar S-matrix models. Cellular characteristics and bi-anisotropy in FNC SRRs have been revealed. In another study, the multifunctional aspect of CNS has been explored for optical gas sensors and EMI shielding. Low-temperature thin-film deposition of CNS, its characterization, morphological investigation, etc., have been presented, including measurements of ammonia gas sensor. In sensor studies, the transfer function of sensors has been characterized. It revealed molecular-level detection of ammonia at optical frequency, whereas DC conductivity measurements, microwave scattering parameters, and optical spectroscopy measurements are presented for multifunctional EMI aspect. The use of CNS in shield technology is being confirmed by analysing coating characteristics, electrical conduction, and % reflectional loss analysis followed by exploring shielding mechanism. Mechanical properties of GNCs (@ ~0.01 wt%), notably fracture toughness (K IC) and critical strain energy release rate (G IC), are found to increase by ~51% and 40%, while flexural strength and modulus increased by 22% and 23%, respectively, as compared to pristine epoxy. The effect is attributed to the excellent dispersion.
