Aerosol Synthesis of Cargo-Filled Graphene Nanosacks

Abstract

Water microdroplets containing graphene oxide and a second solute are shown to spontaneously segregate into sack-cargo nanostructures upon drying. Analytical modelling and molecular dynamics suggest the sacks form when slow-diffusing graphene oxide preferentially accumulates and adsorbs at the receding air-water interface, followed by capillary collapse. Cargo-filled graphene nanosacks can be nanomanufactured by a simple, continuous, scalable process and are promising for many applications where nanoscale materials should be isolated from the environment or biological tissue.

A Universal Strategy to Prepare Functional Porous Graphene Hybrid Architectures

“…In the case of Au-NPs, during the hydrothermal process, Au-NPs were driven to attach on rGO sheets due to the van der Waals interaction ( Figure S6, Supporting Information), [49][50][51][52][53] and the rGO sheets with Au-NPs were partially overlapped at many sites and crumpled to minimize their surface energies (named as adsorbing-crosslinkingshrinking (ACS)), [ 6,47,54,55 ] forming the network structure, as depicted in Figure 2 c. However, in the case of Zn 2 SnO 4 -NWs, since the size of rGO sheets is smaller than that of Zn 2 SnO 4 -NWs, rGO sheets tend to wrap and shrink to NWs by multiple adhesion sites due to the enhanced hydrophobic and van der Waals interactions in the hydrothermal process. [ 43,47 ] At the same time, the rGO sheets that enwrapped the NWs are also partially overlapped and shrink into a 3D network and NWs lean against each other during the shrinking process of rGO sheets, leading to the increased pore size, as depicted in Figure 2 f. Different from the ACS mechanism of rGO/Au-NP hybrid architectures, the formation of rGO/Zn 2 SnO 4 -NW hybrid architectures is a wrapping-crosslinking-shrinking (WCS) process (Figure 2 f).…”

Self-adaptive strain-relaxation optimization for high-energy lithium storage material through crumpling of graphene

“…The cG has been realized in previous studies and is thought to be driven by thermal expansion, capillary compression and pre-strain relaxation [27][28][29][30] . In particular, Huang's group first demonstrated that capillary compression effectively cG into a ball-like structure in rapidly evaporating aerosol droplets process 30 .…”

Green Routes for Graphene Oxide Reduction and Self- Assembled Graphene Oxide Micro- and Nanostructures Production

“…Other interesting approach to obtain coated-rGO nanoparticles is the aerosol encapsulation technique reported by Chen et al [75], to coat citric acid-stabilized Ag nanoparticles. These workers used an ultrasonic system to generate an aerosol composed of GO and Ag nanostructures, which was transported into a furnace at 600 CbyusingN 2 as the carrier gas.…”