Distinct Chemical and Physical Properties of Janus Nanosheets

Al C. De Leon, Bradley J. Rodier, Qinmo Luo, Christina M. Hemmingsen, Peiran Wei, Kevin Abbasi, Rigoberto Advincula, Emily B. Pentzer

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

Janus particles have recently garnered significant attention for their distinct properties compared to particles that are homogeneously functionalized. Moreover, high aspect ratio Janus particles that are rod-like or planar (i.e., nanosheets) are especially intriguing considering their interfacial properties as well as their ability to assemble into higher order and hybrid structures. To date, major challenges facing the exploration and utilization of 2D Janus particles are scalability of synthesis, characterization of tailored chemical functionalization, and ability to introduce a diverse set of functionalities. Herein, a facile method to access Janus 2D graphene oxide (GO) nanosheets by combining a Pickering-type emulsion and grafting-from polymerization via ATRP is reported. Janus GO nanosheets bearing PMMA on one face as well as the symmetrically functionalized analogue are prepared, and the chemical, thermal, structural, surface, and interfacial properties of these materials are characterized. Time-of-flight secondary ion mass spectrometry coupled with Langmuir-Blodgett films is shown to be an ideal route to conclusively establish asymmetric functionalization of 2D materials. This work not only provides a facile route for the preparation of Janus nanosheets but also demonstrates the direct visualization of polymer grown from the surface of GO.

Original languageEnglish
Pages (from-to)7485-7493
Number of pages9
JournalACS Nano
Volume11
Issue number7
DOIs
Publication statusPublished - 2017 Jul 25
Externally publishedYes

Fingerprint

Janus
Nanosheets
chemical properties
Chemical properties
Graphite
Physical properties
physical properties
Oxides
Graphene
graphene
Bearings (structural)
oxides
Langmuir Blodgett films
Atom transfer radical polymerization
Polymethyl Methacrylate
Secondary ion mass spectrometry
Emulsions
routes
Scalability
Aspect ratio

Keywords

  • asymmetric functionalization
  • grafting-from
  • graphene oxide
  • Janus particles
  • ToF-SIMS

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

De Leon, A. C., Rodier, B. J., Luo, Q., Hemmingsen, C. M., Wei, P., Abbasi, K., ... Pentzer, E. B. (2017). Distinct Chemical and Physical Properties of Janus Nanosheets. ACS Nano, 11(7), 7485-7493. https://doi.org/10.1021/acsnano.7b04020

Distinct Chemical and Physical Properties of Janus Nanosheets. / De Leon, Al C.; Rodier, Bradley J.; Luo, Qinmo; Hemmingsen, Christina M.; Wei, Peiran; Abbasi, Kevin; Advincula, Rigoberto; Pentzer, Emily B.

In: ACS Nano, Vol. 11, No. 7, 25.07.2017, p. 7485-7493.

Research output: Contribution to journalArticle

De Leon, AC, Rodier, BJ, Luo, Q, Hemmingsen, CM, Wei, P, Abbasi, K, Advincula, R & Pentzer, EB 2017, 'Distinct Chemical and Physical Properties of Janus Nanosheets', ACS Nano, vol. 11, no. 7, pp. 7485-7493. https://doi.org/10.1021/acsnano.7b04020
De Leon AC, Rodier BJ, Luo Q, Hemmingsen CM, Wei P, Abbasi K et al. Distinct Chemical and Physical Properties of Janus Nanosheets. ACS Nano. 2017 Jul 25;11(7):7485-7493. https://doi.org/10.1021/acsnano.7b04020
De Leon, Al C. ; Rodier, Bradley J. ; Luo, Qinmo ; Hemmingsen, Christina M. ; Wei, Peiran ; Abbasi, Kevin ; Advincula, Rigoberto ; Pentzer, Emily B. / Distinct Chemical and Physical Properties of Janus Nanosheets. In: ACS Nano. 2017 ; Vol. 11, No. 7. pp. 7485-7493.
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