Sorting carbon nanotubes by electronic structure using density differentiation
Using the scalable technique of density-gradient ultracentrifugation, isolated narrow distributions of SWNTs in which >97% are within a 0.02-nm-diameter range are isolated.
Colloidal properties and stability of graphene oxide nanomaterials in the aquatic environment.
- I. Chowdhury, Matthew C. Duch, Nikhita D. Mansukhani, M. Hersam, D. Bouchard
- EngineeringEnvironmental Science and Technology
- 28 May 2013
GO nanomaterials will be stable in the natural aquatic environment and that significant aqueous transport of GO is possible, according to time-resolved dynamic light scattering relevant to natural and engineered systems.
Nanotechnology Research Directions for Societal Needs in 2020: Retrospective and Outlook
1. Enabling and Investigative Tools: Theory, Modeling, and Simulation 2. Enabling and Investigative Tools: Measuring Methods,Instruments and Metrology 3. Synthesis, Processing and Manufacturing of…
Synthesis of borophenes: Anisotropic, two-dimensional boron polymorphs
At Atomic-scale characterization, supported by theoretical calculations, revealed structures reminiscent of fused boron clusters with multiple scales of anisotropic, out-of-plane buckling that are consistent with predictions of a highly an isotropic, 2D metal.
Emerging device applications for semiconducting two-dimensional transition metal dichalcogenides.
By critically assessing and comparing the performance of these devices with competing technologies, the merits and shortcomings of this emerging class of electronic materials are identified, thereby providing a roadmap for future development.
Minimizing oxidation and stable nanoscale dispersion improves the biocompatibility of graphene in the lung.
The results demonstrate that the covalent oxidation of graphene is a major contributor to its pulmonary toxicity and suggest that dispersion of pristine graphene in Pluronic provides a pathway for the safe handling and potential biomedical application of two-dimensional carbon nanomaterials.
Solution phase production of graphene with controlled thickness via density differentiation.
Graphene flakes with controlled thicknesses are isolated in solution using density gradient ultracentrifugation, which results in graphene-surfactant complexes having buoyant densities that vary with graphene thickness.
Enrichment of single-walled carbon nanotubes by diameter in density gradients.
The bulk enrichment and separation of single-walled carbon nanotubes by diameter has been achieved through ultracentrifugation of DNA-wrappedSWNTs in aqueous density gradients and the optical absorbance spectra of the separated SWNTs indicate that SWNTS of decreasing diameter are increasingly more buoyant.
Current saturation and electrical breakdown in multiwalled carbon nanotubes.
In air failure is initiated by oxidation at a particular power, whereas in vacuum MWNTs can withstand much higher power densities and reach their full current carrying capacities, and the initiation of this failure is very sensitive to air exposure.
Diverse Applications of Nanomedicine
An overview of recent developments in nanomedicine is provided and the current challenges and upcoming opportunities for the field are highlighted and translation to the clinic is highlighted.