Publication
Title
Optical property tuning of single-wall carbon nanotubes by endohedral encapsulation of a wide variety of dielectric molecules
Author
Abstract
Specific and tunable modification to the optical properties of single-wall carbon nanotubes (SWCNTs) is demonstrated through direct encapsulation into the nanotube interior of guest molecules with widely varying static dielectric constants. Filled through simple ingestion of the guest molecule, each SWCNT population is demonstrated to display a robust modification to absorbance, fluorescence, and Raman spectra. Over 30 distinct compounds, covering static dielectric constants from 1.8 to 109, are inserted in large diameter SWCNTs (d= 1.104−1.524 nm) and more than 10 compounds in small diameter SWCNTs (d= 0.747−1.153 nm), demonstrating that the general effect of filler dielectric on the nanotube optical properties is a monotonic energy reduction(red-shifting) of the optical transitions with increased magnitude of the dielectric constant. Systematic fitting of the two-dimensional fluorescence−excitation and Raman spectra additionally enables determination of the critical filling diameter for each molecule and distinguishing of overall trends from specific guest−host interactions. Comparisons to predictions from existing theory are presented, and specific guest molecule/SWCNT chirality combinations that disobey the general trend and theory are identified. A general increase of the fluorescence intensity and line narrowing is observed for low dielectric constants, with long linear alkane filled SWCNTs exhibiting emission intensities approaching those of empty SWCNTs. These results demonstrate an exploitable modulation in the optical properties of SWCNTs and provide a foundation for examining higher-order effects, such as due to nonbulk-like molecule stacking, in host−guest interactions in well-controlled nanoporesize materials.
Language
English
Source (journal)
ACS nano. - -
Publication
2021
ISSN
1936-0851
DOI
10.1021/ACSNANO.0C08352
Volume/pages
15 :2 (2021) , p. 2301-2317
Article Reference
acsnano.0c08352
ISI
000623061800022
Pubmed ID
33382594
Medium
E-only publicatie
Full text (Publisher's DOI)
Full text (open access)
UAntwerpen
Faculty/Department
Research group
Project info
Separation and high-resolution spectroscopic characterisation of carbon nanotubes and nanocomposites.
Advanced in situ optical spectroscopy to unravel the separation of carbon nanotubes by diameter and chiral structure.
Nonlinear Optics of Bistable Molecules and One-Dimensional Arrays.
Functional Carbon Nanotube Nanohybrids: from Synthesis to Advanced Spectroscopic Characterization
Carbon nanomaterial enhanced optical fibres for biomedical imaging and sensing (CHARMING).
Order in one dimension: Functional hybrids of chiralitysorted carbon nanotubes (ORDERin1D).
Functional Hybrids of Carbon Nanotubes
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identifier
Creation 10.02.2021
Last edited 02.10.2024
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