Preparation of sterically stabilized gold nanoparticles for plasmonic applications
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Monika Benkovičová
,
Karol Végsö
Abstract
Plasmonic nanoparticles such as those of gold or silver have been recently investigated as a possible way to improve light absorption in thin film solar cells. Here, a simple method for the preparation of spherical plasmonic gold nanoparticles in the form of a colloidal solution is presented. The nanoparticle diameter is controlled in the range from several nm to tens of nm depending on the synthesis parameters with the size dispersion down to 14 %. The synthesis is based on thermal decomposition and reduction of the chloroauric acid in the presence of a stabilizing capping agent (surfactant) that is very slowly injected into the hot solvent. The surfactant prevents uncontrolled nanoparticle aggregation during the growth process. The nanoparticle size and shape depend on the type of the stabilizing agent. Surfactants with different lengths of the hydrocarbon chains such as Z-octa-9-decenylamine (oleylamine) with AgNO3 and polyvinylpyrrolidone with AgNO3 were used for the steric stabilization. Hydrodynamic diameter of the gold nanoparticles in the colloidal solution was determined by dynamic light scattering while the size of the nanoparticle metallic core was found by small-angle X-ray scattering. The UV-VIS-NIR spectrophotometer measurements revealed a plasmon resonance absorption in the 500–600 nm range. Self-assembled nanoparticle arrays on a silicon substrate were prepared by drop casting followed by spontaneous evaporation of the solvent and by a modified Langmuir-Blodgett deposition. The degree of perfection of the self-assembled arrays was analyzed by scanning electron microscopy and grazing-incidence small-angle X-ray scattering. Homogeneous close-packed hexagonal ordering of the nanoparticles stretching over large areas was evidenced. These results document the viability of the proposed nanoparticle synthesis for the preparation of high-quality plasmonic templates for thin film solar cells with enhanced power conversion efficiency, surface enhanced Raman scattering, and other applications.
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© 2013 Institute of Chemistry, Slovak Academy of Sciences
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Artikel in diesem Heft
- Evaluation of waste products in the synthesis of surfactants by yeasts
- Investigation of CO2 and ethylethanolamine reaction kinetics in aqueous solutions using the stopped-flow technique
- Alkali pre-treatment of Sorghum Moench for biogas production
- Modelling of kinetics of microbial degradation of simulated leachate from tobacco dust waste
- Model predictive control-based robust stabilization of a chemical reactor
- Decomposition of meta- and para-phenylphenol during ozonation process
- Treatment of effluents from a membrane bioreactor by nanofiltration using tubular membranes
- Zeolite and potting soil sorption of CO2 and NH3 evolved during co-composting of grape and tobacco waste
- Liquid-solid equilibrium for the NaCl-NaHCO3-Na2CO3-H2O system at 45°C. Validation of mixed solvent electrolyte model
- Investigation of turbulent flow field in a Kenics static mixer by Laser Doppler Anemometry
- Effect of flow-rate on ethanol separation in membrane distillation process
- Preparation of aluminium ammonium calcium phosphates using microwave radiation
- Continuous dehydrochlorination of 1,3-dichloropropan-2-ol to epichlorohydrin: process parameters and by-products formation
- Preparation of sterically stabilized gold nanoparticles for plasmonic applications
- Synthesis and spectroscopic characterisation of (E)-2-(2-(9-(4-(1H-1,2,4-triazol-1-yl)butyl)-9H-carbazol-3-yl)vinyl)-3-ethylbenzo[d]thiazol-3-ium, a new ligand and potential DNA intercalator
- Microwave-assisted oxidation of alcohols by hydrogen peroxide catalysed by tetrabutylammonium decatungstate
- Dynamic shape and wall correction factors of cylindrical particles falling vertically in a Newtonian liquid
- Selective oxidation of metallic single-walled carbon nanotubes
