Publication
Title
Diameter-dependent optical absorption and excitation energy transfer from encapsulated dye molecules toward single-walled carbon nanotubes
Author
Abstract
The hollow cores and well-defined diameters of single-walled carbon nanotubes (SWCNTs) allow for creation of one-dimensional hybrid structures by encapsulation of various molecules. Absorption and near-infrared photoluminescence-excitation (PLE) spectroscopy reveal that the absorption spectrum of encapsulated 1,3-bis[4-(dimethylamino)phenyl]-squaraine dye molecules inside SWCNTs is modulated by the SWCNT diameter, as observed through excitation energy transfer (EET) from the encapsulated molecules to the SWCNTs, implying a strongly diameter dependent stacking of the molecules inside the SWCNTs. Transient absorption spectroscopy, simultaneously probing the encapsulated dyes and the host SWCNTs, demonstrates this EET, which can be used as a route to diameter-dependent photosensitization, to be fast (sub-picosecond). A wide series of SWCNT samples is systematically characterized by absorption, PLE, and resonant Raman scattering (RRS), also identifying the critical diameter for squaraine filling. In addition, we find that SWCNT filling does not limit the selectivity of subsequent separation protocols (including polyfluorene polymers for isolating only semiconducting SWCNTs and aqueous two-phase separation for enrichment of specific SWCNT chiralities). The design of these functional hybrid systems, with tunable dye absorption, fast and efficient EET, and the ability to remove all metallic SWCNTs by subsequent separation, demonstrates potential for implementation in photoconversion devices.
Language
English
Source (journal)
ACS nano. - -
Publication
2018
ISSN
1936-0851
Volume/pages
12 :7 (2018) , p. 6881-6894
ISI
000440505000052
Pubmed ID
29965726
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.
High throughput, high performance second order light scattering spectroscopy.
Fully Automated Frequency Agile Characterisation of Organic Nonlinear Optical Materials
Nonlinear Optics of Bistable Molecules and One-Dimensional Arrays.
Functional Carbon Nanotube Nanohybrids: from Synthesis to Advanced Spectroscopic Characterization
Order in one dimension: Functional hybrids of chiralitysorted carbon nanotubes (ORDERin1D).
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identification
Creation 07.09.2018
Last edited 15.09.2021
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