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Merck
  • Super-stretchable graphene oxide macroscopic fibers with outstanding knotability fabricated by dry film scrolling.

Super-stretchable graphene oxide macroscopic fibers with outstanding knotability fabricated by dry film scrolling.

ACS nano (2014-05-07)
Rodolfo Cruz-Silva, Aaron Morelos-Gomez, Hyung-Ick Kim, Hong-Kyu Jang, Ferdinando Tristan, Sofia Vega-Diaz, Lakshmy P Rajukumar, Ana Laura Elías, Nestor Perea-Lopez, Jonghwan Suhr, Morinobu Endo, Mauricio Terrones
要旨

Graphene oxide (GO) has recently become an attractive building block for fabricating graphene-based functional materials. GO films and fibers have been prepared mainly by vacuum filtration and wet spinning. These materials exhibit relatively high Young's moduli but low toughness and a high tendency to tear or break. Here, we report an alternative method, using bar coating and drying of water/GO dispersions, for preparing large-area GO thin films (e.g., 800-1200 cm(2) or larger) with an outstanding mechanical behavior and excellent tear resistance. These dried films were subsequently scrolled to prepare GO fibers with extremely large elongation to fracture (up to 76%), high toughness (up to 17 J/m(3)), and attractive macroscopic properties, such as uniform circular cross section, smooth surface, and great knotability. This method is simple, and after thermal reduction of the GO material, it can render highly electrically conducting graphene-based fibers with values up to 416 S/cm at room temperature. In this context, GO fibers annealed at 2000 °C were also successfully used as electron field emitters operating at low turn on voltages of ca. 0.48 V/μm and high current densities (5.3 A/cm(2)). Robust GO fibers and large-area films with fascinating architectures and outstanding mechanical and electrical properties were prepared with bar coating followed by dry film scrolling.

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製品内容

Sigma-Aldrich
硫酸, ACS reagent, 95.0-98.0%
Sigma-Aldrich
リン酸, ACS reagent, ≥85 wt. % in H2O
Sigma-Aldrich
過マンガン酸カリウム, ACS reagent, ≥99.0%
Sigma-Aldrich
リン酸, 85 wt. % in H2O, 99.99% trace metals basis
Sigma-Aldrich
リン酸, ACS reagent, ≥85 wt. % in H2O
Sigma-Aldrich
硫酸, 99.999%
Sigma-Aldrich
リン酸, puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., ≥85%
Sigma-Aldrich
リン酸, crystalline, ≥99.999% trace metals basis
Sigma-Aldrich
硫酸, puriss. p.a., for determination of Hg, ACS reagent, reag. ISO, reag. Ph. Eur., 95.0-97.0%
Sigma-Aldrich
リン酸, puriss. p.a., crystallized, ≥99.0% (T)
Sigma-Aldrich
リン酸, puriss., meets analytical specification of Ph. Eur., BP, NF, FCC, 85.0-88.0%
Sigma-Aldrich
硫酸, SAJ first grade, ≥95.0%
Sigma-Aldrich
過酸化水素 溶液, contains ~200 ppm acetanilide as stabilizer, 3 wt. % in H2O
Sigma-Aldrich
過マンガン酸カリウム, ACS reagent, ≥99.0%, low in mercury
Sigma-Aldrich
ヒドラジン水和物 溶液, puriss. p.a., 24-26% in H2O (RT)
Sigma-Aldrich
硫酸, JIS special grade, ≥95.0%
Sigma-Aldrich
リン酸, BioUltra, ≥85% (T)
Sigma-Aldrich
硫酸, puriss., meets analytical specification of Ph. Eur., BP, 95-97%
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過マンガン酸カリウム, ≤150 μm particle size, 97%
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硫酸 溶液, puriss. p.a., ≥25% (T)
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ヒドラジン 水和物, reagent grade, N2H4 50-60 %
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リン酸, ≥85 wt. % in H2O, ≥99.999% trace metals basis
Sigma-Aldrich
ヒドラジン 一水和物, N2H4 64-65 %, reagent grade, ≥97%
Millipore
過酸化水素 溶液, 3%, suitable for microbiology
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過酸化水素 溶液, JIS special grade, 30.0-35.5%
Sigma-Aldrich
リン酸, BioReagent, suitable for insect cell culture, 85%
Supelco
硫酸濃縮溶液, 0.1 M H2SO4 in water (0.2N), eluent concentrate for IC
Sigma-Aldrich
過酸化水素 溶液, SAJ first grade, ≥30.0%
Sigma-Aldrich
リン酸, JIS special grade, ≥85.0%
Sigma-Aldrich
硫酸 溶液, 70%