Monolayer Protected Gold Clusters
Download Monolayer Protected Gold Clusters full books in PDF, epub, and Kindle. Read online free Monolayer Protected Gold Clusters ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Monolayer Protected Gold Clusters
Author | : Christopher Jeffries Ackerson |
Publisher | : |
Total Pages | : 274 |
Release | : 2004 |
Genre | : |
ISBN | : |
Intra-Monolayer Hydrogen-Bonding in Monolayer Protected Gold Clusters
Author | : Andrew K. Boal |
Publisher | : |
Total Pages | : 6 |
Release | : 2001 |
Genre | : |
ISBN | : |
Unlike the highly ordered Self-Assembled Monolayers (SAMs) formed on flat gold surfaces those on gold nanoparticles radiate from a roughly spherical center and are amorphous in structure. One result of this structural motif is that the strength of intra-monolayer non-covalent interactions, such as pi-stacking and hydrogen bonding, are a function of the distance of the recognition element from the colloidal core. We present here an exploration of these phenomena in amide functionalized thiols in MPCs where the amide functionality position was varied in the alkane chain.
Optical and Electrochemical Properties of Monolayer Protected Gold Clusters Modified with Fluorophores
Author | : Mary Sajini Devadas |
Publisher | : |
Total Pages | : 254 |
Release | : 2012 |
Genre | : |
ISBN | : |
Highly monodisperse Au clusters with different types of ligands were successfully synthesized with sizes varying from 1 nm to 13 nm. These preformed gold clusters were modified with fluorophores and pseudo-rotaxanes for developing better nonlinear optical materials for sensing and biological imaging purposes.
Synthesis and Characterization of Sulfonate and Phosphonate Functionalized Monolayer Protected Gold Clusters
Author | : Fiurasek Petr |
Publisher | : |
Total Pages | : 218 |
Release | : 2003 |
Genre | : |
ISBN | : |
"Gold clusters protected with self-assembled monolayers of sodium, 10-mercaptodecanesulfonate, HS(CH2)10SO 3Na, and 11-mercaptoundecanylphosphonic acid, HS(CH2) 11PO3H2, were synthesized to provide negatively charged nanoparticles. The negatively charged end groups of the sulfonate- and phosphonate-monolayers protected clusters, SO3-MPCs and PO 3-MPCs, allowed the particles to be water soluble in addition to be stable in air, and can be dried and redissolved without change. Modifications of experimental conditions, namely the thiol:gold ratio, gold concentration and the type of surfactant, yielded MPCs of 1.8--5.7 nm core diameters with a broad range of size dispersity, and solubilities. Transmission electron microscopy, proton nuclear magnetic resonance (1H NMR), UV-Visible and infrared spectroscopies, thermogravimetric and zeta-potential analyses were consistent with nanoparticle formation. The chain conformation, dynamic behavior and ordering of SO3-MPCs and PO3-MPCs were further investigated by solid-state NMR. Despite the high surface curvature of the nanoparticles and the bulky end groups, medium length chains of SO 3-MPCs (C10) and PO3-MPCs (C11) showed a high degree of organization and restricted mobility when compare to long chains of alkanethiolate MPCs (C18). The more extensive hydrogen bonding interactions between the phosphonic acid groups led to a reduced chain mobility and a higher thermal stability. The PO3-MPCs exhibit a high order-disorder transition, partial decomposition and a very marked hysteresis in the chain recrystallization similar to MPCs stabilized by HS(CH2)nCO2H. Solid-state 31P-NMR allowed studies of the hydrogen-bonded self-assembled structure in the PO3-MPCs as well as in the bulk phosphonic acid. The 1.8 nm-diameter SO3-MPCs produced large aggregates in presence of poly(diallyldimethyl-ammonium chloride) (PDADMAC). However, the encapsulation of individual particles was favored when the same polyelectrolyte" --
Analysis of Monolayer-protected Gold Cluster Films
Author | : W. Peter Wuelfing |
Publisher | : |
Total Pages | : 480 |
Release | : 2001 |
Genre | : Gold compounds |
ISBN | : |
Protected Metal Clusters: From Fundamentals to Applications
Author | : |
Publisher | : Elsevier |
Total Pages | : 394 |
Release | : 2015-09-06 |
Genre | : Technology & Engineering |
ISBN | : 0444635025 |
Protected Metal Clusters: From Fundamentals to Applications surveys the fundamental concepts and potential applications of atomically precise metal clusters protected by organic ligands. As this class of materials is now emerging as a result of breakthroughs in synthesis and characterization that have taken place over the last few years, the book provides the first reference with a focus on these exciting novel nanomaterials, explaining their formation, and how, and why, they play an important role in the future of molecular electronics, catalysis, sensing, biological imaging, and medical diagnosis and therapy. Surveys the fundamental concepts and potential applications of atomically precise metal clusters protected by organic ligands. Provides well-organized, tutorial style chapters that are ideal for teaching and self-study In-depth descriptions by top scientists in the field Presents the state-of-the art of protected metal clusters and their future prospects