Optical Voltammetry of Polymer-Encapsulated Single-Walled Carbon Nanotubes
Open accessAbstract
The semiconducting single-walled carbon nanotube (SWCNT), noncovalently wrapped by a polymeric monolayer, is a nanoscale semiconductor–electrolyte interface under investigation for sensing, photonics, and photovoltaic applications. SWCNT complexes are routinely observed to sensitize various electrochemical/redox phenomena, even in the absence of an external field. While the photoluminescence response to gate voltage depends on the redox potential of the nanotube, analogous optical voltammetry of functionalized carbon nanotubes could be conducted in suspension without applying voltage but by varying the solution conditions as well as the chemistry of the encapsulating polymer. Steady-state photoluminescence, absorbance, and in situ measurements of O 2 /H 2 O reactivity show correlation with the pH/p K a -dependent reactivity of π-rich coatings. The nanotube emission responses suggest that the presence of photogenerated potential may explain the observed coating electrochemical reactivity. This work finds that electronic and chemical interactions of the nanotube with the encapsulating polymer may play a critical role in applications that depend on radiative recombination, such as optical sensing.
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Non-covalent encapsulation of SWCNTs with polymers, including short oligonucleotides, facilitates aqueous suspension and confers molecular selectivity to their optical responses via a molecular masking effect and modulation of optical bandgaps.
“Non-covalent encapsulation with polymers, including short oligonucleotides, facilitates aqueous suspension and confers molecular selectivity to their optical responses via (1) contributing to a molecular masking effect that defines the shape and size of the exposed surface of SWCNTs26-28 and (2) modulating their optical bandgaps29.”
From Detection of ovarian cancer via the spectral fingerprinting of quantum-defect-modified carbon nanotubes in serum by machine learning (2022) · cites this paper as [29]
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- [59]Satishkumar BC; Brown LO; Gao Y; Wang CC; Wang HL; Doorn SK Reversible Fluorescence Quenching in Carbon Nanotubes for Biomolecular Sensing. Nat. Nanotechnol 2007, 2, 560– 4. 18654368
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Self-citation
- Authors
- Horoszko, C. P., Jena, P. V., Roxbury, D., Rotkin, S. V., & Heller, D. A.
- Affiliations
- Memorial Sloan Kettering Cancer Center (US)
- University of Rhode Island (US)
- Pennsylvania State University (US)
- Corresponding author
- Heller, Daniel A.
- Venue
- The Journal of Physical Chemistry C
- Publisher
- American Chemical Society (ACS)
- Published
- 2019-09-25
- Volume
- 123
- Issue
- 39
- Pages
- 24200-24208
- ISSN
- 1932-7447 (ISSN-L)
- 1932-7455
- PMC
- PMC7371339
- OpenAlex
- W2975778724
- Cited by
- 9
- References
- 68
- Citations by year
- 2026: 1 · 2025: 1 · 2022: 3 · 2021: 4
- FWCI
- 0.63
- Type
- journal article
- Language
- en
- Open access
- green
- www.ncbi.nlm.nih.gov
- Licence
- Locations
- The Journal of Physical Chemistry C (publishedVersion)
- PubMed (publishedVersion)
- PubMed Central (acceptedVersion)
- Journal of Media Literacy Education (submittedVersion, cc-by)
- Funders
- National Cancer Institute (P30 CA008748)
- Pershing Square Sohn Cancer Research Alliance
- Honorable Tina Brozman Foundation
- NIH Office of the Director (DP2-HD075698)
- Division of Electrical, Communications and Cyber Systems (ECCS-1509786)
- American Cancer Society (PF-13-388801-TBG)
- Division of Chemical, Bioengineering, Environmental, and Transport Systems (1752506)
- Natural Sciences and Engineering Research Council of Canada
- Alan and Sandra Gerry Metastasis Research Initiative
- Louis V. Gerstner Jr. Young Investigator's Fund
- Commonwealth Foundation for Cancer Research
- Cycle for Survival
- Center for Molecular Imaging and Nanotechnology at Memorial Sloan Kettering Cancer Center (P30 CA008748)
- Anna Fuller Fund
- Experimental Therapeutics Center of Memorial Sloan-Kettering Cancer Center
- Expect Miracles Foundation
- Imaging & Radiation Sciences Program at Memorial Sloan Kettering Cancer Center
- Frank A. Howard Scholars Program
- Topics
- Physical Sciences › Materials Science › Materials Chemistry › Carbon Nanotubes in Composites
- Physical Sciences › Materials Science › Materials Chemistry › Graphene research and applications
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Electrochemical sensors and biosensors
- Keywords
- single-walled carbon nanotubes, polymer encapsulation, photoluminescence, nanotube-polymer interface, redox potential, pH-dependent reactivity, radiative recombination, optical sensing, non-covalent functionalization
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