Monolayer Protected Noble Metal Nanocrystals
Author | : Osman Mohammed Bakr |
Publisher | : |
Total Pages | : 340 |
Release | : 2009 |
ISBN-13 | : OCLC:501276330 |
ISBN-10 | : |
Rating | : 4/5 ( Downloads) |
Download or read book Monolayer Protected Noble Metal Nanocrystals written by Osman Mohammed Bakr and published by . This book was released on 2009 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: This technique was used to ascertain that IBANs are a unique thiolated Ag cluster with a tentative molecular formula of Ag 74±2 (SR) 40±1 . The described SV-AUC technique has accuracy comparable to that of mass spectroscopy, but has the advantage of being compatible with even the most delicate clusters. The IBANs represent the first report of a stable, monodispersely synthesized thiolated Ag cluster to be reliably assigned a molecular formula. The last part of the dissertation deals with the synthesis and optical properties of gold nanourchins. These are large (|∼40-50nm) gold nanoparticles (NPs) that have multiple branches and possess a morphology similar to sea urchins. The particles are protected with a monolayer of thiols. Finite-difference time domain (FDTD) modeling suggests that these particles have large local field enhancements in the vicinity of their branches. These enhancements are found to increase the optical limiting performance of nanourchins, in comparison to spherical particles of the same dimensions.