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Title: Engineering Supramolecular Polymer Conformation for Efficient Carbon Nanotube Sorting

Abstract

Supramolecular polymer sorting is a promising approach to separating single-walled carbon nanotubes (CNTs) by electronic type. Unlike conjugated polymers, they can be easily removed from the CNTs after sorting by breaking the supramolecular bonds, allowing for isolation of electronically pristine CNTs as well as facile recycling of the sorting polymer. However, little is understood about how supramolecular polymer properties affect CNT sorting. Herein, chain stoppers are used to engineer the conformation of a supramolecular sorting polymer, thereby elucidating the relationship between sorting efficacy and polymer conformation. Through NMR and UV–vis spectroscopy, small-angle X-ray scattering (SAXS), and thermodynamic modeling, it is shown that this supramolecular polymer exhibits ring–chain equilibrium, and that this equilibrium can be skewed toward chains by the addition of chain stoppers. Furthermore, by controlling the stopper–monomer ratio, the sorting yield can be doubled from 7% to 14% without compromising the semiconducting purity (>99%) or properties of sorted CNTs.

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [1];  [1]; ORCiD logo [1]; ORCiD logo [1]
  1. Stanford Univ., CA (United States)
  2. Stanford Univ., CA (United States); Peking Univ., Beijing (China)
Publication Date:
Research Org.:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1637902
Alternate Identifier(s):
OSTI ID: 1632020
Grant/Contract Number:  
ECCS‐1542152. SAXS; AC02‐76SF00515
Resource Type:
Accepted Manuscript
Journal Name:
Small
Additional Journal Information:
Journal Volume: 16; Journal Issue: 26; Journal ID: ISSN 1613-6810
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING

Citation Formats

Gao, Theodore Z., Sun, Zehao, Yan, Xuzhou, Wu, Hung‐Chin, Yan, Hongping, and Bao, Zhenan. Engineering Supramolecular Polymer Conformation for Efficient Carbon Nanotube Sorting. United States: N. p., 2020. Web. doi:10.1002/smll.202000923.
Gao, Theodore Z., Sun, Zehao, Yan, Xuzhou, Wu, Hung‐Chin, Yan, Hongping, & Bao, Zhenan. Engineering Supramolecular Polymer Conformation for Efficient Carbon Nanotube Sorting. United States. https://doi.org/10.1002/smll.202000923
Gao, Theodore Z., Sun, Zehao, Yan, Xuzhou, Wu, Hung‐Chin, Yan, Hongping, and Bao, Zhenan. Fri . "Engineering Supramolecular Polymer Conformation for Efficient Carbon Nanotube Sorting". United States. https://doi.org/10.1002/smll.202000923. https://www.osti.gov/servlets/purl/1637902.
@article{osti_1637902,
title = {Engineering Supramolecular Polymer Conformation for Efficient Carbon Nanotube Sorting},
author = {Gao, Theodore Z. and Sun, Zehao and Yan, Xuzhou and Wu, Hung‐Chin and Yan, Hongping and Bao, Zhenan},
abstractNote = {Supramolecular polymer sorting is a promising approach to separating single-walled carbon nanotubes (CNTs) by electronic type. Unlike conjugated polymers, they can be easily removed from the CNTs after sorting by breaking the supramolecular bonds, allowing for isolation of electronically pristine CNTs as well as facile recycling of the sorting polymer. However, little is understood about how supramolecular polymer properties affect CNT sorting. Herein, chain stoppers are used to engineer the conformation of a supramolecular sorting polymer, thereby elucidating the relationship between sorting efficacy and polymer conformation. Through NMR and UV–vis spectroscopy, small-angle X-ray scattering (SAXS), and thermodynamic modeling, it is shown that this supramolecular polymer exhibits ring–chain equilibrium, and that this equilibrium can be skewed toward chains by the addition of chain stoppers. Furthermore, by controlling the stopper–monomer ratio, the sorting yield can be doubled from 7% to 14% without compromising the semiconducting purity (>99%) or properties of sorted CNTs.},
doi = {10.1002/smll.202000923},
journal = {Small},
number = 26,
volume = 16,
place = {United States},
year = {Fri Jun 05 00:00:00 EDT 2020},
month = {Fri Jun 05 00:00:00 EDT 2020}
}

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