Optothermally Reversible Carbon Nanotube–DNA Supramolecular Hybrid Hydrogels

Nikhita D. Mansukhani, Linda M. Guiney, Zonghui Wei, Eric W. Roth, Karl W. Putz, Erik Luijten, Mark C Hersam

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Supramolecular hydrogels (SMHs) are three-dimensional constructs wherein the majority of the volume is occupied by water. Since the bonding forces between the components of SMHs are noncovalent, SMH properties are often tunable, stimuli-responsive, and reversible, which enables applications including triggered drug release, sensing, and tissue engineering. Meanwhile, single-walled carbon nanotubes (SWCNTs) possess superlative electrical and thermal conductivities, high mechanical strength, and strong optical absorption at near-infrared wavelengths that have the potential to add unique functionality to SMHs. However, SWCNT-based SMHs have thus far not realized the potential of the optical properties of SWCNTs to enable reversible response to near-infrared irradiation. Here, we present a novel SMH architecture comprised solely of DNA and SWCNTs, wherein noncovalent interactions provide structural integrity without compromising the intrinsic properties of SWCNTs. The mechanical properties of these SMHs are readily tuned by varying the relative concentrations of DNA and SWCNTs, which varies the cross-linking density as shown by molecular dynamics simulations. Moreover, the SMH gelation transition is fully reversible and can be triggered by a change in temperature or near-infrared irradiation. This work explores a new regime for SMHs with potential utility for a range of applications including sensors, actuators, responsive substrates, and 3D printing.

Original languageEnglish
Article number1700587
JournalMacromolecular Rapid Communications
Volume39
Issue number2
DOIs
Publication statusPublished - Jan 1 2018

Fingerprint

Hydrogels
Carbon
Single-walled carbon nanotubes (SWCN)
Infrared radiation
DNA
Irradiation
Structural integrity
Gelation
Tissue engineering
Light absorption
Strength of materials
Molecular dynamics
Printing
Thermal conductivity
Actuators
Optical properties
Wavelength
Mechanical properties
Water
Sensors

Keywords

  • carbon nanotubes
  • DNA
  • near-infrared
  • optothermally reversible
  • supramolecular hydrogels

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

Cite this

Optothermally Reversible Carbon Nanotube–DNA Supramolecular Hybrid Hydrogels. / Mansukhani, Nikhita D.; Guiney, Linda M.; Wei, Zonghui; Roth, Eric W.; Putz, Karl W.; Luijten, Erik; Hersam, Mark C.

In: Macromolecular Rapid Communications, Vol. 39, No. 2, 1700587, 01.01.2018.

Research output: Contribution to journalArticle

Mansukhani, Nikhita D. ; Guiney, Linda M. ; Wei, Zonghui ; Roth, Eric W. ; Putz, Karl W. ; Luijten, Erik ; Hersam, Mark C. / Optothermally Reversible Carbon Nanotube–DNA Supramolecular Hybrid Hydrogels. In: Macromolecular Rapid Communications. 2018 ; Vol. 39, No. 2.
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