Novel amino-acid-based polymer/multi-walled carbon nanotube bio-nanocomposites: Highly water dispersible carbon nanotubes decorated with gold nanoparticles
Article
Kumar, Nanjundan Ashok, Bund, Andreas, Cho, Byung Gwon, Lim, Kwon Taek and Jeong, Yeon Tae. 2009. "Novel amino-acid-based polymer/multi-walled carbon nanotube bio-nanocomposites: Highly water dispersible carbon nanotubes decorated with gold nanoparticles." Nanotechnology. 20 (22). https://doi.org/10.1088/0957-4484/20/22/225608
Article Title | Novel amino-acid-based polymer/multi-walled carbon nanotube bio-nanocomposites: Highly water dispersible carbon nanotubes decorated with gold nanoparticles |
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ERA Journal ID | 5163 |
Article Category | Article |
Authors | Kumar, Nanjundan Ashok, Bund, Andreas, Cho, Byung Gwon, Lim, Kwon Taek and Jeong, Yeon Tae |
Journal Title | Nanotechnology |
Journal Citation | 20 (22) |
Article Number | 225608 |
Number of Pages | 9 |
Year | 2009 |
ISSN | 0957-4484 |
1361-6528 | |
Digital Object Identifier (DOI) | https://doi.org/10.1088/0957-4484/20/22/225608 |
Web Address (URL) | https://iopscience.iop.org/article/10.1088/0957-4484/20/22/225608 |
Abstract | A well-reproducible and completely green route towards highly water dispersible multi-walled carbon nanotubes (MWNT) is achieved by a non-invasive, polymer wrapping technique, where the polymer is adsorbed on the MWNT's surface. Simply mixing an amino-acid-based polymer derivative, namely poly methacryloyl β-alanine (PMBA) with purified MWNTs in distilled water resulted in the formation of PMBA–MWNT nanocomposite hybrids. Gold nanoparticles (AuNPs) were further anchored on the polymer-wrapped MWNTs, which were previously sonicated in distilled water, via the hydrogen bonding interaction between the carboxylic acid functional groups present in the polymer-modified MWNTs and the citrate-capped AuNPs. The surface morphologies and chemistries of the hybrids decorated with nanoparticles were characterized by transmission electron microscopy (TEM) and UV–visible absorption spectroscopy. Additionally, the composites were also prepared by the in situ free radical polymerization of the monomer, methacryloyl β-alanine (MBA), with MWNTs. Thus functionalized MWNTs were studied by thermogravimetric analysis (TGA), field emission scanning electron microscopy (FE-SEM) and TEM. Both methods were effective in the nanotube functionalization and ensured good dispersion and high stability in water over three months. Due to the presence of the high densities of carboxylic acid functionalities on the surface of CNTs, various colloidal nanocrystals can be attached to MWNTs. |
Keywords | Alanine |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 401602. Composite and hybrid materials |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Pukyong National University, Korea |
Dresden University of Technology, Germany |
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