Nucleation-controlled polymerization of nanoparticles into supramolecular structures
| Autor: | Jing Wang, Yao Lin, Hua Lu, Yanfeng Zhang, Ranjan Kumar Kamat, Hongwei Xia, Andrey V. Dobrynin, Jianjun Cheng |
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| Rok vydání: | 2013 |
| Předmět: |
inorganic chemicals
chemistry.chemical_classification Models Molecular Chain propagation technology industry and agriculture Nucleation Supramolecular chemistry Nanoparticle Nanotechnology macromolecular substances General Chemistry Biochemistry Catalysis Nanomaterials Supramolecular assembly Polymerization Supramolecular polymers Colloid and Surface Chemistry chemistry Polyglutamic Acid Nanoparticles Gold Particle Size |
| Zdroj: | Journal of the American Chemical Society. 135(31) |
| ISSN: | 1520-5126 |
| Popis: | Controlled assembly of inorganic nanoparticles (NPs) into structurally defined supramolecular polymers will create nanomaterials with new collective properties. However, supramolecular polymerization of isotropic NPs remains a challenge because of the lack of anisotropic interactions in these monomers to undergo directional associations for the cooperative growth of supramolecular chains. Herein we report self-assembly behavior of poly(l-glutamic acid)-grafted gold NPs in solution and describe how combined attractive and repulsive interactions influence the shape and size of the resulting supramolecular assemblies. The study shows that the chain growth of supramolecular polymers can be achieved from the NP monomers and the process occurs in two distinct stages, with a slow nucleation step followed by a faster chain propagation step. The resulting supramolecular structures depend on both the grafting density of the poly(l-glutamic acid) on the NPs and the size of the NPs. |
| Databáze: | OpenAIRE |
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