How does thiol bind to gold?
As proposed by Ron et al.37, thiols may directly react with the oxidative gold surface to form Au–S bonds via the oxidation–reduction reaction involving the reduction of the gold oxide and the direct adsorption of thiols onto the reduced gold surface.
Can Gold Nanoparticles self assemble?
Metallic nanoparticles, such as gold and silver nanoparticles, can self-assemble into highly ordered arrays known as supercrystals for potential applications in areas such as optics, electronics, and sensor platforms.
How are self assembled monolayers formed?
Self-assembled monolayers are formed by simply immersing a substrate into a solution of the surface-active material. The driving force for the spontaneous formation of the 2D assembly includes chemical bond formation of molecules with the surface and intermolecular interactions.
What is gold thiol bond?
The driving force for the anchoring of thiols on gold surfaces is the formation of a gold–sulphur bond. Thiols are also used to stabilize small metal particles from agglomeration. The use of thiols furthermore enables the preparation of very small gold particles or clusters.
What is a thiol bond?
In organic chemistry, a thiol is a compound that contains the –SH functional group, which is the sulfur analog of a hydroxyl or alcohol group. Thiols and alcohols have similar molecular structure, although the C–S–H bond angle is closer to 90° than the C–O–H bond angle of alcohol.
How does self assembly work?
Self-assembly is a process in which a disordered system of pre-existing components forms an organized structure or pattern as a consequence of specific, local interactions among the components themselves, without external direction.
Are gold nanoparticles hydrophobic?
5 nm and 3 nm functionalized gold nanoparticles are available with a range of solubility properties: hydrophilic, hydrophobic, and amphiphilic. (mean core diameter 4.08 ± 0.76 nm).
How does self-assembly work?
What are self-assembled monolayers used for?
SAMs can serve as models for studying membrane properties of cells and organelles and cell attachment on surfaces. SAMs can also be used to modify the surface properties of electrodes for electrochemistry, general electronics, and various NEMS and MEMS.