Au Nanoparticle-based Multilayer Ultrathin Films with Covalently Linked Nanostructures:  Spraying Layer-by-layer Assembly and Mechanical Property Characterization

Abstract

We have studied electrostatic layer-by-layer spraying assembly of inorganic/organic nanocomposite multilayered films consisting of Au nanoparticle (Au NP) and photosensitive polycation nitrodiazoresin (NDR). A uniform growth of the Au NP-based assembly film is revealed by UV−vis spectroscopy and AFM-film thickness measurements. We demonstrate that cross-linked films can be produced by UV irradiation which induces the conversion of originally ionic bonds into covalent ones. The nanostructure of the film such as the thickness and the fraction of Au NP can be tailored by the adsorption conditions. Thus, we find that the mechanical properties, which were measured using a buckling test method, can be tailored to a certain degree.

Composite films of polycations and TiO2 nanoparticles with photoinduced superhydrophilicity

“…The nanoparticles will be synthesized in situ during the film build-up instead of being deposited along the LBL process [14][15][16][17]. It will imply the LBL deposition of PEI and a precursor of titanium dioxide, namely Ti(IV) bis(ammoniumlactato)dihydroxide (TiBisLac) by alternated spraying of the corresponding solutions [18][19][20] as well as by dipping the substrate in the corresponding solutions. The possibility to deposit thin and homogeneous hybrid organic-inorganic films by spray is the main aim of the present article.…”

Preparation of TiO2 films by layer-by-layer assembly and their application in solar cell

“…The absorption peak increases linearly with the number of assembled bilayers, which suggests the TiO 2 NPs in the composite film grow regularly and uniformly. Such a behavior could be observed in many layer-by-layer deposition systems due to electrostatic interaction [17][18][19]. XPS measurements were performed to identify elemental composition of multilayer films deposited on the single-crystal silicon substrate.…”

Self‐Assembly of Gold Nanoparticles/Electroactive Polyelectrolyte Multilayer Films for Tunable Electrocatalysis

“…Such changes in the absorption band are attributed to the change in dielectric environment due to the interaction with Fc-PEI [35,36]. Absorbance of the multilayer film at 580 nm increased linearly with the number of bilayers [37,38]. The result demonstrates that each assembly deposits approximately the same amount of nanoparticles and uniform assemblies are constructed.…”