title: Preparation and Exceptional Mechanical Properties of Bone-Mimicking Size-Tuned Graphene Oxide@Carbon Nanotube Hybrid Paper.
abstract: The self-assembled nanostructures of carbon nanomaterials possess a damage-tolerable architecture crucial for the inherent mechanical properties at both micro- and macroscopic levels. Bone, or "natural composite," has been known to have superior energy dissipation and fracture resistance abilities due to its unique load-bearing hybrid structure. However, few approaches have emulated the desirable structure using carbon nanomaterials. In this paper, we present an approach in fabricating a hybrid composite paper based on graphene oxide (GO) and carbon nanotube (CNT) that mimicks the natural bone structure. The size-tuning strategy enables smaller GO sheets to have more cross-linking reactions with CNTs and be homogeneously incorporated into CNT-assembled paper, which is advantageous for effective stress transfer. The resultant hybrid composite film has enhanced mechanical strength, modulus, toughness, and even electrical conductivity compared to previously reported CNT-GO based composites. We further demonstrate the usefulness of the size-tuned GOs as the "stress transfer medium" by performing in situ Raman spectroscopy during the tensile test.
authors.affiliation: Carbon Nanomaterials Design Laboratory, Research Institute of Advanced Materials, and Department of Materials Science and Engineering, Seoul National University , Seoul 151-744, Korea.
authors.forename: Jun Young
authors.initials: JY
authors.lastname: Oh
authors.affiliation: Carbon Nanomaterials Design Laboratory, Research Institute of Advanced Materials, and Department of Materials Science and Engineering, Seoul National University , Seoul 151-744, Korea.
authors.forename: Yern Seung
authors.initials: YS
authors.lastname: Kim
authors.affiliation: Carbon Nanomaterials Design Laboratory, Research Institute of Advanced Materials, and Department of Materials Science and Engineering, Seoul National University , Seoul 151-744, Korea.
authors.forename: Yeonsu
authors.initials: Y
authors.lastname: Jung
authors.affiliation: Carbon Nanomaterials Design Laboratory, Research Institute of Advanced Materials, and Department of Materials Science and Engineering, Seoul National University , Seoul 151-744, Korea.|Advanced Nanohybrids Laboratory, Department of Applied Organic Materials Engineering, Inha University , Incheon 402-751, Korea.
authors.forename: Seung Jae
authors.initials: SJ
authors.lastname: Yang
authors.affiliation: Carbon Nanomaterials Design Laboratory, Research Institute of Advanced Materials, and Department of Materials Science and Engineering, Seoul National University , Seoul 151-744, Korea.
authors.forename: Chong Rae
authors.initials: CR
authors.lastname: Park
mesh_terms: D018786:Bone Substitutes / Q000737:chemistry*; D006108:Graphite / Q000737:chemistry*; D037742:Nanotubes, Carbon / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*; D010209:Paper; D013059:Spectrum Analysis, Raman
chemical_list: D018786:Bone Substitutes; D037742:Nanotubes, Carbon; D010087:Oxides; D006108:Graphite
keywords: artificial bone; bioinspired; carbon nanotube; graphene oxide; mechanical properties; stress-transfer