Terahertz time-domain spectroscopy characterization of carbon nanostructures embedded in polymer

G. Chen, R. Shrestha, A. Amori, Z. Staniszewski, A. Jukna, A. Korliov, C. Richter, M. El Fray, T. Krauss, Roman Sobolewski

Research output: Contribution to journalConference articlepeer-review

2 Citations (Scopus)

Abstract

This work presents results of terahertz time-domain spectroscopy (THz-TDS) investigations of two types of polymer-based nanocomposites, consisting of bulk samples of graphene nanoflakes embedded in a polymer matrix and thin films where single-walled carbon nanotubes (SWCNTs) with a chiral index (7,5) were wrapped in single strains of a polymer. Our THz-TDS setup is a roomerature system with a frequency range of 0.1 to 3.5 THz, based on photoconductive switches as both the emitter and detector, excited by 100-fs-wide optical pulses. We have studied THz spectra of both types of samples and compared them to the ones obtained for the pure polymer reference specimens and fitted the experimental complex conductivity data to the Drude-Smith model. The Drude-Smith model fits our data well, demonstrating that graphene nanoflakes and SWCNTs, exhibit highly localized intra grain/tube electron backscattering with a femtosecond relaxation time.

Original languageEnglish
Article number012002
JournalJournal of Physics: Conference Series
Volume906
Issue number1
DOIs
Publication statusPublished - 22 Oct 2017
Event20th International Conference on Electron Dynamics in Semiconductors, Optoelectronics and Nanostructures, EDISON 2017 - Buffalo, United States
Duration: 17 Jul 201721 Jul 2017

Bibliographical note

Publisher Copyright:
© Published under licence by IOP Publishing Ltd.

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