Creation of interfacial phonons by carbon nanotube–polymer coupling

Abstract

Incorporation of carbon nanotubes into nylon-6 creates interfacial phonons; phonon occupation at low frequency regime is therefore enhanced, leading to thermal conductivity improvement by 74-78%.

Carbon nanotubes enhanced Seebeck coefficient and power factor of rutile TiO2

“…1(a) and (b)) was weak and enhanced scattering at the interfaces was expected. 13 Measurements carried out at 300 K yield k = 3.05 W m À1 K À1 for oxide and 2.2-2.39 W m À1 K À1 for TC 0.1-1 , supporting enhanced scattering at the tube/oxide contacts (Fig. 6(a)).…”

“…Fourth, S was promoted from 470 mV K À1 (oxide) to 550 mV K À1 (TC 0.1-1 ) at 300 K and from 500 mV K À1 to 610 mV K À1 at CNTs conduct heat and are often dispersed in the polymers to improve k. The incorporation of CNTs into a polymer, however, induces heat resistance at the interfaces and effective thermal conduction appears to rely on the tube-polymer cohesion. 13 The oxide-tube coupling, according to SEM inspections (Fig. 1(a) and (b)) was weak and enhanced scattering at the interfaces was expected.…”

ZnO‐Coated Carbon Nanotubes: Inter‐Diffusion of Carboxyl Groups and Enhanced Photocurrent Generation

“…Accordingly, Zn 2 + may preferentially combine with COO· to form isolated domains in the oxides. Figure 6 b displays ab initio simulations, [11] and the ZnCO 3 (113) and ZnO (101) crystallographic planes are highlighted according to the XRD data. We were, however, unable to determine the diffusion path from the CNT to the oxide, whereas the migration of carboxyl groups into ZnO (100) planes seems feasible.…”

Carbon nanotube stabilized conductive polymers

“…1͑e͒ and 1͑f͔͒ and Raman spectra confirm the radial breathing mode ͑RBM͒ at 172 cm −1 . [10][11][12] Compared with bare nanotubes the RBM absorption in film-B is lowered by 60% whereas band does not blueshift, indicative of weak compressive stress on CNTs 13 A similar absorption smearing also occurs in D-band known originating from lattice imperfections induced phonon scattering at zone boundaries. In contrast, the G-band remains strong in film-B and doublet feature appears to fit well with the Breit-Wigner-Fano model, attributable to enhanced plasmon-phonon coupling through interaction.…”