Browsing by Author "Tunc, I."
Now showing items 1-8 of 8
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Charge storage and release onto Au and Ag nanoparticles in aqueous medium as probed by optical spectroscopy
(Cognizure, 2014)Gold and silver nanoparticles in aqueous solutions can store negative or positive charges when, respectively, NaBH4, KI are introduced into the same media. The charge storage can be followed by the spectral shifts in the ... -
Charging/discharging of Au (core)/silica (shell) nanoparticles as revealed by XPS
(American Chemical Society, 2005)By recording XPS spectra while applying external voltage stress to the sample rod, we can control the extent of charging developed on core-shell-type gold nanoparticles deposited on a copper substrate, in both steady-state ... -
Label-free nanometer-resolution imaging of biological architectures through surface enhanced raman scattering
(Nature Publishing Group, 2013)Label free imaging of the chemical environment of biological specimens would readily bridge the supramolecular and the cellular scales, if a chemical fingerprint technique such as Raman scattering can be coupled with super ... -
Optical response of Ag-Au bimetallic nanoparticles to electron storage in aqueous medium
(2008)Composition and structure dependence of the shift in the position of the surface plasmon resonance band upon introduction of NaBH 4 to aqueous solutions of gold and silver nanoparticles are presented. Silver and gold ... -
Preparation of Au and Au-Pt nanoparticles within PMMA matrix using UV and X-ray irradiation
(2009)Au and Au-Pt alloy nanoparticles are prepared and patterned at room temperature within the PMMA polymer matrix by the action of 254 nm UV light or X-rays. The polymer matrix enables us to entangle the kinetics of the ... -
Surface enhanced Raman spectroscopy of unilamellar liposomes loaded with silver nanoparticles
(American Scientific Publishers, 2017)Imaging organic molecules using surface-enhanced Raman spectroscopy (SERS) has drawn attention due to its non-invasive nature and label-free approach. The SERS approach can be used in tracking organic molecules and monitoring ... -
X-ray induced reduction of Au and Pt ions on silicon substrates
(2007)Prolonged exposure to X-rays of HAuCl4, PtCl4 and their mixtures, deposited from an aqueous solution onto a silicon substrate, causes chemical reduction of the metal ions to their metallic states. The corresponding oxidation ... -
XPS characterization of Au (core)/SiO2 (shell) nanoparticles
(American Chemical Society, 2005)Core-shell nanoparticles with ca. 15-nm gold core and 6-nm silica shell were prepared and characterized by XPS. The Au/Si atomic ratio determined by XPS is independent of the electron takeoff angle because of the concentric ...
