Poly(p-xylylene) Silver Nanocomposites: Optical, Radiative, and Structural Properties

The Poly(chloro-p-xylylene)-Ag Metal-Polymer Nanocomposites Obtained by Controlled Vapor-Phase Synthesis for SERS Effect Realisation

“…The dielectric constant of the sample with a silver content of 5% vol. contains a resonance (Figure 5a), which is characteristic of metaldielectric composites [19] and is caused by plasmon resonance on metal particles. The resonance is slightly away from the 785 nm radiation wavelength used to excite SERS.…”

“…At high concentrations, the size and concentration of particles reaches a level where they coalesce into large three-dimensional clusters, which leads to a decrease in the number of "hot spots" and an increase in losses. In [19], from AFM and SEM data, studies of the surface and structure of composites, and the results of small-angle X-ray studies, the dependences of the shape and size of silver particles in nanocomposites on its volume concentration are presented. For concentrations of 10 and 12% vol., the size distribution has been shown to be bimodal, with peaks shifted towards higher values.…”

“…There are a number of examples of the implementation of such structures in matrices of varying nature with using different methods: simple mixing [14], spin-coating method [15], electrospinning [16], mixing with a precursor followed by metal reduction wit forming nanoparticles [17], preliminary mixing of metal nanoparticles with a monomer and subsequent polymerization [18]. Using the previously developed technology for the formation of metal-polymer nanocomposites in vacuum [19,20], vapor-phase deposition polymerization (VDP) on substrates cooled with liquid nitrogen, it is possible to obtain coatings with specific optical properties and to stabilize nanoparticles. In particular, we have created substrates based on a polymer matrix made of PCPX, an inert polymer, with silver nanoparticles introduced into it.…”

Оптичні Характеристики Біметалевих Нанокуль

“…4 in work [15], where the dependence A ( , ) was calculated for Ag nanoparticles and compared with experimental data). After the publication of the famous book [19], in which the optical size-dependent properties of monometallic clusters located in various matrices were analyzed, there appeared only a few reports on the results of new measurements in the literature, most likely because of the complicated character of experiments [20][21][22]. Interest in the early works was mainly focused on the absorption by metal particles in the far-infrared spectral interval (see, e.g., works [16,17] and the references therein).…”

The Influence of the Multiple Scattering on the Optical Properties of Ag-poly(p-xylylene) Composite Coating

“…The previously developed method [12] of the PPX coatings production is based on the use of polymerization of p-xylylene from the gas phase. The manufacturing of the PPX+Ag composite is a developed technology that opens up the opportunity to produce the metal-polymer coatings [4,[28][29][30]. The method of cryochemical synthesis of PPX with simultaneous sublimated silver deposition makes it possible to produce metal-polymer coatings with different silver volume concentrations [28][29][30].…”