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Assembly of Silver Nanoparticles in Pearl-Necklace-Like Nanostructure Using a Polyelectrolyte

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Abstract:

Pearl-necklace-like Ag nanostructures are prepared with microwave irradiation in a one-step process using polymethacrylic acid (PMAA) as a reducing agent, and AgNO3 as a silver precursor without other chemical agent in a 6.5≤pH≤8.0 aqueous solution. Derjaguin- Landau-Verwey-Overbeek theory is used to calculate the stability of Ag particles in the aqueous medium. The calculated results are fairly consistent with the experimental results. The formation mechanism of pearl-necklace-like silver nanostructures is suggested as three steps: immobilization of Ag+ ions with the PMAA template, reduction of Ag+ ions with PMAA under microwave irradiation, anisotropic self-assembly of silver particles capped by the negatively charged PMAA with electrostatic interactions and Van der Waals forces.





Keywords: (DLVO) theory; Ag+ ions; AgNO3; CO2; COOH; HRTEM; Infra-red (IR) measurement; One-dimensional; PMAA; Polyelectrolyte; Time; UV/Vis spectrum; Van der Waals forces; XRD pattern; crystals; electrostatic interactions; microwave; microwave irradiation; nanostructures; pH; quasi-2D; self-assembly; silver; spaced nanoparticles; spectroscopy; template

Document Type: Research Article

DOI: https://doi.org/10.2174/157341310793348623

Publication date: 2010-12-01

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  • Current Nanoscience publishes authoritative reviews and original research reports, written by experts in the field on all the most recent advances in nanoscience and nanotechnology. All aspects of the field are represented including nano- structures, synthesis, properties, assembly and devices. Applications of nanoscience in biotechnology, medicine, pharmaceuticals, physics, material science and electronics are also covered. The journal is essential to all involved in nanoscience and its applied areas.
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