Mechanisms of Colloidal Stabilization of Oxidized Nanocarbons in the Presence of Polymers: Obtaining Highly Stable Colloids in Physiological Media
| Autor: | Cristiane A. Silva, Viviane M. Saboia, Amauri J. Paula, Romana Petry, Francisco A. Sousa, Gislaine Cristina Padovani, Antonio G. Souza Filho, Camila de Araújo Holanda, Alexandre Rocha Paschoal |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
chemistry.chemical_classification
Nanotube Materials science Graphene Oxide Nanotechnology Polyethylene glycol Polymer Carbon nanotube Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention chemistry.chemical_compound Colloid General Energy Adsorption chemistry law Physical and Theoretical Chemistry |
| Zdroj: | The Journal of Physical Chemistry C. 119:18741-18752 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/acs.jpcc.5b04274 |
| Popis: | There are successful protocols for dispersing carbon nanotubes and graphene oxide in physiological media by using biocompatible polymers, which enable their use in nanomedicine. However, there is not a clear understanding regarding the mechanisms of the colloidal stabilization manifested (i.e., electric, steric, electrosteric, or through depletion forces). Here we show that the manifestation of a particular mechanism of stabilization for oxidized carbon nanotubes (CNTs) and graphene oxide (GO) in the presence of Pluronic F-127 (PF127) and short- and long-chain polyethylene glycol (PEG 1500 or 35000, respectively) depends on a proper matching between the nanocarbon morphology and the polymer chain length, chemical structure, and concentration. The high aspect ratio one-dimensional morphology of CNTs enables an initial steric and electrosteric stabilization through the nanotube wrapping (i.e., adsorption) by PF127 present in low concentrations ( |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|