Publication
Title
Comparing transmission electron microscopy and Raman spectral imaging for the characterization of single-walled carbon nanotube diameter distributions
Author
Abstract
Resonant Raman spectroscopy is a widely used technique for single-walled carbon nanotube (SWCNT) characterization, in particular in the radial breathing mode (RBM) range which provides direct information on the structure of the nanotube in resonance. The RBM peak counting method, i.e. acquiring Raman spectrum grids on a substrate with a select set of discrete laser lines and counting RBM peaks as single nanotubes, is frequently used to characterize SWCNT growth samples, despite the many factors that can induce errors in the results. In this work, we cross-characterize the diameter distributions obtained through this methodology with diameter distributions obtained by counting SWCNT diameters in transmission electron microscopy (TEM) and discuss the different results and biases between the techniques. This study is performed on a broad diameter distribution sample, and on two chirality-enriched samples whose chirality distributions are determined by photoluminescence excitation spectroscopy (PLE) and statistical analysis of high resolution TEM (HRTEM) images. We show that the largest differences between the Raman peak counting and TEM diameter distributions stem from the chirality-dependence of SWCNT Raman cross-sections and the patchy vision offered by the use of only a few discrete excitation wavelengths. The effect of the substrate and TEM-related biases are also discussed.
Language
English
Source (journal)
Carbon. - Oxford
Publication
Oxford : 2021
ISSN
0008-6223
DOI
10.1016/J.CARBON.2020.09.012
Volume/pages
171 (2021) , p. 968-979
ISI
000598371500101
Full text (Publisher's DOI)
Full text (open access)
Full text (publisher's version - intranet only)
UAntwerpen
Faculty/Department
Research group
Project info
Advanced in situ optical spectroscopy to unravel the separation of carbon nanotubes by diameter and chiral structure.
Separation and high-resolution spectroscopic characterisation of carbon nanotubes and nanocomposites.
Separation, sorting and enhanced optical properties of intact carbon nanotubes and their composites.
Functional Carbon Nanotube Nanohybrids: from Synthesis to Advanced Spectroscopic Characterization
Chirality-defined sorting and optical characterization of double-wall carbon nanotubes.
Order in one dimension: Functional hybrids of chiralitysorted carbon nanotubes (ORDERin1D).
Functional Hybrids of Carbon Nanotubes
TunabLe pulsed And continuouS-wavE laseR facility (T-LASER).
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identifier
Creation 16.10.2020
Last edited 02.10.2024
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