Designed Three-Dimensional Freestanding Single-Crystal Carbon Architectures

Abstract

Single-crystal carbon nanomaterials have led to great advances in nanotechnology. The first singlecrystal carbon nanomaterial, fullerene, was fabricated in a zero-dimensional form. One-dimensional carbon nanotubes and two-dimensional graphene have since followed and continue to provide further impetus to this field. In this study, we fabricated designed three-dimensional (3D) single-crystal carbon architectures by using silicon carbide templates. For this method, a designed 3D SiC structure was transformed into a 3D freestanding single-crystal carbon structure that retained the original SiC structure by performing a simple single-step thermal process. The SiC structure inside the 3D carbon structure is self-etched, which results in a 3D freestanding carbon structure. The 3D carbon structure is a single crystal with the same hexagonal close-packed structure as graphene. The size of the carbon structures can be controlled from the nanoscale to the microscale, and arrays of these structures can be scaled up to the wafer scale. The 3D freestanding carbon structures were found to be mechanically stable even after repeated loading. The relationship between the reversible mechanical deformation of a carbon structure and its electrical conductance was also investigated. Our method of fabricating designed 3D freestanding single-crystal graphene architectures opens up prospects in the field of single-crystal carbon nanomaterials, and paves the way for the development of 3D single-crystal carbon devices.

Effects of graphene imperfections on the structure of self-assembled pentacene films

“…Effects of graphene imperfections on the structure of self-assembled pentacene films W Jung 1 , S J Ahn 1 , S Y Lee 1 , Y Kim 1 , H-C Shin 1 , Y Moon 1 , S H Woo 2 , C-Y Park 1 and J R Ahn 1,3 dianhydride (PTCDA) [17][18][19], perylene tetracarboxylic diimide [25,26], 7,7′,8,8′-tetracyano-p-quinodimethane [27,28], metal phthalocyanines [29,30], and pentacene [31]. In particular, the interfacial structure between a pentacene film and graphene has been focused on and investigated with photoemission spectroscopy [32], 2D grazing incidence diffraction, and near-edge x-ray absorption fine-structure spectroscopy [13].…”

“…Graphene, a one-atom-thick planar structure of sp 2 -bonded carbon atoms, is considered an emerging material because of its outstanding mechanical and electronic properties [1][2][3][4]. In particular, its high optical transparency, high charge-carrier mobility, and low sheet resistance have led it to be considered a potential electrode material for optoelectronic devices [5], such as organic light-emitting diodes [6,7], organic field-effect transistors [8][9][10][11][12][13], and organic photovoltaic devices [14,15].…”

Interconnected Graphene Networks with Uniform Geometry for Flexible Conductors

“…Recently lots of strategies have been utilized to construct 3D graphene architectures with specialized morphologies. Due to the great advance of single‐crystal carbon architectures in nanoelectronics, a SiC wafer was used to grow designed 3D free standing single‐crystal graphene by performing a simple single‐step thermal process to meet the potential use in 3D electronic devices . Because of low cost, high yield, easy scalability, and adjustability, the self‐assembly of graphene oxide (GO), which is easily obtained by the oxidation of graphite, has been extensively developed for the fabrication of 3D graphene macroporous structures, such as graphene paper with great rigidity and strength, honeycomb‐like 3D graphene with superior electrical conductivity for supercapacitor application, and transparent conductive fibers as conductive wire .…”

An Atomistic Tomographic Study of Oxygen and Hydrogen Atoms and their Molecules in CVD Grown Graphene

“…Applications of graphene are driven by the large‐scale synthesis of graphene with the high quality, purity, and uniformity. The scalable growth of graphene and further epitaxial growth of hetero‐phase structures on graphene have been developed using chemical vapor deposition (CVD) on metal foils or SiC substrates . The growth of graphene on copper (Cu) is particularly useful for monolayer formation due to the low solubility of carbon in copper and the catalytic behavior of a copper surface in a hydrocarbon gas .…”