Influence of nanoparticle shape on colloidal plasmonic interface properties

Download

index.pdf

Date

2014

Author

Sarıgül, Elif

Metadata

Show full item record

Item Usage Stats

167
views

183
downloads

Nanoparticles bearing free charges, interact very strongly with incoming electromagnetic radiation at certain frequencies called the plasmon resonance frequencies, depending on the size, shape and material properties of the particle and the medium. In order to enhance the light scattering by a two dimensional network of such plasmonic nanoparticles several strategies can be followed. In this thesis, it was pursued the fabrication and characterization of the nanoparticle decorated surfaces by colloidal solution based technique as a self-organized random production method. Optical and spectral electrical properties of plasmonic interfaces were investigated for nanosphere, nanowire and nanobipyramid particles to find out the most efficient geometry. It was also discussed the feasibility of the application of metal nanoparticles to solar cell devices.

Subject Keywords

Nanoparticles., Plasmonics., Nanotechnology., Surface plasmon resonance.

URI

http://etd.lib.metu.edu.tr/upload/12617954/index.pdf
https://hdl.handle.net/11511/24113

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Effects of array guided surface waves on radiation characteristics of a finite planar printed dipole array Aydın Çivi, Hatice Özlem; Pathak, PH (2004-06-26) The presence of surface waves different from the conventional grounded dielectric substrate surface wave modes, which can be excited on a finite periodic radiating array of printed dipoles, at frequencies for which the spacing between dipoles is typically less than half a wavelength is studied. The effects of such array guided surface waves on the array radiation characteristics are investigated. Techniques to suppress these surface waves are also discussed.
Optimization of a microbolometer pixel for operation in the sub-1 THz region Demirörs, Oytun; Atik, Bahar; Dirican, Emrah; Altan, Hakan; Esentürk, Okan; Ylldlrlm, Mustafa; Akın, Tayfun (2021-01-01) Imaging in the Terahertz (THz) region has drawn attention in recent years, but the nature of the THz frequency regime causes some drawbacks in imaging such as long wavelength, high cost, and low emission levels at room temperature. Because of the high atmospheric absorption of THz waves, fabrication of a microbolometer pixel that works in the sub-1 THz frequency regime is necessary. Large pixel pitches due to longer wavelengths and the resulting higher thermal mass pose a difficult challenge. Due to those l...
Effect of particle properties and light polarization on the plasmonic resonances in metallic nanoparticles Guler, Urcan; Turan, Raşit (2010-08-02) The resonance behavior of localized surface plasmons in silver and gold nanoparticles was studied in the visible and near-infrared regions of the electromagnetic spectrum. Arrays of nano-sized gold (Au) and silver (Ag) particles with different properties were produced with electron-beam lithography technique over glass substrates. The effect of the particle size, shape variations, period, thickness, metal type, substrate type and sulfidation were studied via transmission and reflectance measurements. The re...
Influence of oxygen plasma modification on surface free energy of PMMA films and cell attachment Ozcan, Canturk; Zorlutuna, Pinar; Hasırcı, Vasıf Nejat; Hasırcı, Nesrin (2007-10-04) For any biomaterial placed into a biological medium, the surface properties of the material, such as porosity, crystallinity, presence and distribution of electrical charge and functional groups are very critical parameters that determine the acceptance or rejection of the material. Applications, especially tissue engineering require some surface modifications at the molecular level without disturbing the bulk properties of the implants in order to enhance the cell attachment on the material. An appropriate...
Effects of surface potential fluctuations on DLTS of MOS structure Ozder, S; Atilgan, I; Katircioglu, B (1996-02-01) Although the conventional large signal deep-level transient spectroscopy (DLTS) technique is immune to surface potential fluctuations resulting from interface charge inhomogeneities in a MOS structure, in energy resolved, small signal DLTS, the eventual surface potential fluctuation should be considered. In this paper, the effect of the potential fluctuation on the temperature-scan DLTS signal for a given gate bias has been carried out. In fact, this effect shifts the DLTS peak position to lower temperature...

Citation Formats

E. Sarıgül, “Influence of nanoparticle shape on colloidal plasmonic interface properties,” M.S. - Master of Science, Middle East Technical University, 2014.