Structure and optical properties of Au-polyimide nanocomposite films prepared by ion implantation

Abstract

Au-polyimide nanocomposites have been synthesized by implanting different doses of Au+ ions in 100 nm thick films of pyromellitic dianhydride-4,4(') oxydianiline polyimide, prepared by glow discharge vapor deposition polymerization. Unambiguous evidence of Au nanoclusters growth is found only at the highest implantation doses (5x10(16) Au+/cm(2)). Structural, compositional, and optical characterizations show that the implantation induces the compactation of the initial film due to H and C loss. The resulting structure is a composite containing 2-3 nm gold nanoparticles arranged in a layer of about 40 nm and, just beneath the sample surface, a 15 nm thick carbon-rich layer. Optical simulations suggest the presence of a gold-carbon core-shell structure in the nanoparticles

Poly(methyl methacrylate) composites with size-selected silver nanoparticles fabricated using cluster beam technique

“…23,24 An advantage of this method is in possibility to use different metal species and synthesize particles in practically any polymer as well as to control the depth at which the particles are nucleated by tuning the ion energy. However, a highfluence implantation leads to significant radiation damage of polymer structure and evolution of composition that becomes a disadvantage for practical use of such composites.…”

Comparative catalytic activity of PET track-etched membranes with embedded silver and gold nanotubes

“…One of the most popular approaches is based on metal ions implantation of polymer matrix [12][13]. This technique allows prepare composites with small size distribution of nanoparticles, but from another hand it has major restriction such as complicated equipment and special conditions to prevent heating of film during implantation process.…”

An Overview on Nanocrystalline ZnFe2O4, MnFe2O4, and CoFe2O4 Synthesized by a Thermal Treatment Method

“…Metal spinel ferrite nanoparticles have the general molecular formula MFe 2 O 4 (e.g., M = Ni, Zn, Mn, Co, or Mg), and they have a facecentered-cubic (fcc) close packing structure. Among the spinel ferrites compounds, zinc ferrite, manganese ferrite, and nickel ferrite have been studied extensively due to their different structures composed of inverse, normal, and mixed spinel structures, respectively, and their high electromagnetic performance, excellent chemical stability, mechanical hardness, low coercivity, and moderate saturation magnetization, which make it a good contender for the application as soft magnets and low-loss materials at high frequencies [1][2][3]. These properties are dependent on the chemical composition and microstructural characteristics in which the particle size and shape might be controlled in the fabrication processes.…”