Mesoscale assembly of chemically modified graphene into complex cellular networks

Abstract

The widespread technological introduction of graphene beyond electronics rests on our ability to assemble this two-dimensional building block into three-dimensional structures for practical devices. To achieve this goal we need fabrication approaches that are able to provide an accurate control of chemistry and architecture from nano to macroscopic levels. Here, we describe a versatile technique to build ultralight (density ≥1 mg cm−3) cellular networks based on the use of soft templates and the controlled segregation of chemically modified graphene to liquid interfaces. These novel structures can be tuned for excellent conductivity; versatile mechanical response (elastic-brittle to elastomeric, reversible deformation, high energy absorption) and organic absorption capabilities (above 600 g per gram of material). The approach can be used to uncover the basic principles that will guide the design of practical devices that by combining unique mechanical and functional performance will generate new technological opportunities.

Developing strength and toughness in bio-inspired silicon carbide hybrid materials containing a compliant phase

“…This technique has been exploited to produce scaffolds with complex porosity [24,[26][27][28][29][30], and has proven to be effective for the fabrication of nacre-like composites based on alumina [3,6,8,24,25]. By unidirectional freezing of a ceramic suspension, a solid body made of alternate layers of ice and ceramic particles is produced.…”

Graphene Oxide‐Based Electrode Inks for 3D‐Printed Lithium‐Ion Batteries

“…[ 20 ] Based on this feature, 3D printing of graphene oxide has been successfully performed, into different structural forms such as nanowires, [ 21 ] aerogel microlattices, [ 14 ] and complex networks. [ 22,23 ] A majority of studies focus on the fundamentals of 3D-printed graphene oxide materials and their structures. Highly concentrated graphene oxide inks have been shown to be directly printed into fi ne fi laments and then a layer-by-layer deposition strategy can be utilized to develop diverse architectures with exceptional properties (e.g., high surface area, high electrical conductivity, good structural stability).…”

Fluorosurfactants‐Directed Preparation of Homogeneous and Hierarchical‐Porosity CMP Aerogels for Gas Sorption and Oil Cleanup

“…To date, for almost all aerogels, the emphasis has been placed on the chemical composition,13 solvent,14, 15 and some general reaction conditions (temperature, time, and pressure) 16. The gel with homogeneous chemical composition can be easily obtained without considering environmental atmosphere in the reaction process.…”