Electrochemical Layer By Layer Assembly Of Organic Small Molecule/Inorganic Gold Nanoparticle

The integrative chemistry of organic and inorganic hybrid complex and hierarchicalnanostructure has been attracted as emerging specific technological merits approaching toexcellent performance in photoelectronics, catalysis, sensor, biotechnology, etc.The distinct characteristics of hybrid materials depend on their physical chemistry natureand organization stacking states, so the control in dispersity is a key process of hybridfabrication. Although a variety of approaches to the preparation of nanocomposite films havebeen introduced, such as blending, sol-gel processes, and self-assembly, the layer by layerassembly method. Nanocomposite films were prepared by polar solvents-mainly aqueousmedia with poor quality compared to that examples prepared in organic solvents. Theinorganic nanoparticle tends to phase separate from organic materials at higher loadingconcentration. Meanwhile, achieving a controllable continuous percolation network and ahybrid film is a major challenge.Aiming at above problem, we achieve layer by layer assembly through electrochemicallycovalent carbon-carbon coupling reaction of the pendant alkyl carbonyl molecule andnanoparticle. The cross-link structure of film through electrochemically coupling reaction ofcarbonyl molecule has good morphology stability. So it is easy to control the dispersion ofgold nanoparticles in film. Gold nanoparticles film prepared by this method has good electricconductivity, can be directly used electrode of the photovoltaic device. We also demonstratethis strategy could be used to fabricate entire solution processable device assembled withactive layer and electrode.