Conjugated polymer mediated synthesis of nanoparticle clusters and core/shell nanoparticles |
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| Authors: | Ping Xu Kuan Chang Young Il Park Bin Zhang Leilei Kang Yunchen Du Rashi S. Iyer Hsing-Lin Wang |
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| Affiliation: | 1. Department of Chemistry, Harbin Institute of Technology, Harbin 150001, China;2. C-PCS, Los Alamos National Laboratory, Los Alamos, NM 87545, USA;3. B-7, Los Alamos National Laboratory, Los Alamos, NM 87545, USA |
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| Abstract: | Two water soluble conjugated polymers, poly(3,4-ethylene dioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) and ammonium ion stabilized poly(phenylene vinylene) (P2), are found to be able to reduce noble metal ions to zero-valent metals via a direct chemical deposition technique. Au nanoparticle clusters can be obtained through reduction of Au3+ ions by PEDOT:PSS and the electronic coupling between them can be controlled by HAuCl4 concentration. Core/shell Ag/polymer nanostructures are prepared from reduction of Ag+ ions by P2, which have a ppb detection limit for 4-MBA using surface-enhanced Raman spectroscopy (SERS). This conjugated polymer mediated synthesis of metal nanoparticles may open a new avenue for fabricating nanomaterials and nanocomposites with tunable optical properties that are dominated by their structure and electronic coupling between nanoparticles. |
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