Self-assembled gold nanoparticle monolayers in sol-gel matrices: synthesis and gas sensing applications

摘要

Gold nanoparticle monolayers have been deposited on amino-functionalized commercial glass and on sol\u2013gel glass surfaces using a fast chemisorption protocol. The nanoparticle surface coverage could be tuned by varying the deposition conditions. The nanoparticle monolayers have been embedded into SiO2 sol\u2013gel matrices to study the feasibility of this approach for the engineering of sol\u2013gel based nanocomposites. The same approach has been used for obtaining Au\u2013NiO multilayer films which showed a reversible absorbance change when exposed to CO (100\u201310000 ppm) at 300C operating temperature.