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Title: Large-deformation and high-strength amorphous porous carbon nanospheres

Journal Article · · Scientific Reports
DOI:https://doi.org/10.1038/srep24187· OSTI ID:1624828
 [1];  [2];  [3];  [2];  [3];  [2];  [2];  [2];  [4];  [2];  [3];  [5]
  1. Univ. of Virginia, Charlottesville, VA (United States). Dept. of Mechanical and Aerospace Engineering
  2. Univ. of Illinois at Urbana-Champaign, IL (United States). Dept. of Materials Science and Engineering
  3. Univ. of Science and Technology of China, Hefei (China). Dept. of Polymer Science and Engineering. CAS Key Lab. of Soft Matter Chemistry
  4. Northwestern Polytechnical Univ., Xi'an (China). Dept. of Engineering Mechanics
  5. Univ. of Virginia, Charlottesville, VA (United States). Dept. of Mechanical and Aerospace Engineering; Univ. of Virginia, Charlottesville, VA (United States). Inst. for Nanoscale and Quantum Scientific and Technological Advanced Research

Carbon is one of the most important materials extensively used in industry and our daily life. Crystalline carbon materials such as carbon nanotubes and graphene possess ultrahigh strength and toughness. In contrast, amorphous carbon is known to be very brittle and can sustain little compressive deformation. Inspired by biological shells and honeycomb-like cellular structures in nature, we introduce a class of hybrid structural designs and demonstrate that amorphous porous carbon nanospheres with a thin outer shell can simultaneously achieve high strength and sustain large deformation. The amorphous carbon nanospheres were synthesized via a low-cost, scalable and structure-controllable ultrasonic spray pyrolysis approach using energetic carbon precursors. In situ compression experiments on individual nanospheres show that the amorphous carbon nanospheres with an optimized structure can sustain beyond 50% compressive strain. Both experiments and finite element analyses reveal that the buckling deformation of the outer spherical shell dominates the improvement of strength while the collapse of inner nanoscale pores driven by twisting, rotation, buckling and bending of pore walls contributes to the large deformation.

Research Organization:
Univ. of Virginia, Charlottesville, VA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
FG02-05ER46217
OSTI ID:
1624828
Journal Information:
Scientific Reports, Vol. 6, Issue 1; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (5)

High performance n-type Ag2Se film on nylon membrane for flexible thermoelectric power generator journal February 2019
Compressive properties of hollow BN nanoparticles: theoretical modeling and testing using a high-resolution transmission electron microscope journal January 2018
Synthesis of carbon nanospheres and piezoresistive study of carbon nanospheres-PEDOT:PSS nanocomposite flexible thin film for strain sensing applications journal April 2019
Structure of Carbon Materials Explored by Local Transmission Electron Microscopy and Global Powder Diffraction Probes journal December 2018
Effects of porosity on dynamic indentation resistance of silica nanofoam journal April 2017

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