Optical properties of self-assembled 2D and 3D superlattices of silver nanoparticles

Article Abstract:

The optical characteristics of nanosized silver particles dispersed in hexane solution were compared to those arranged in 2D or 3D superlattices. The particles were developed into monolayers structured in a hexagonal network which displayed a plasmon peak tending toward lower energy with an increase in bandwidth. The free coated particles dispersed in hexane solution did not exhibit these properties. The shift toward lower energy is probably due to the expansion of the dielectric constant of the matrix structure of the nanoparticles. Evidence of tunneling electrons through the double layers was also obtained.

Electron transport, Crystal optics

---

Cobalt nanosized particles organized in a 2D superlattice: synthesis, characterization, and magnetic properties

Article Abstract:

Transmission electron microscopy, small angle X-ray scattering, electron and x-ray diffraction spectroscopies were used in studying the magnetic behavior of self-assembled 2D monolayers of cobalt nanosized particles. These particles are stable in air, have narrow size distributions and immediately form a 2D hexagonal network when deposited on a graphite support. There is a collective effect due to the 2D organization in magnetization of 5.8 nm colloidal particles in a self-assembled hexagonal state.

Analysis, Domain structure, Thin films, Monomolecular films, Magnetic properties

---

Seven-nanometer hexagonal close packed cobalt nanocrystals for high-temperature magnetic applications through a novel annealing process

Article Abstract:

Seven-nanometer cobalt nanocrystals are synthesized by colloidal chemistry, which demonstrates a novel approach for obtaining small size hcp, structured cobalt magnetic nanocrystals for many technological applications. Gentle annealing induces a direct structural transition from a low crystalline state to the hexagonal close packed (hep) phase without changing the size, size distribution, and the lauric acid passivating layer.

Primary nonferrous metals, not elsewhere classified, Primary Smelting and Refining of Nonferrous Metal (except Copper and Aluminum), Cobalt, Usage, Observations, Nanotechnology, Annealing, Chemical properties

Similar abstracts:

• Abstracts: Surface-enhanced fluorescence of fluorescein-labeled oligonucleotides capped on silver nanoparticles. Effects of sample thickness on the optical properties of surface plasmon-coupled emission
• Abstracts: Uniform electrochemical deposition of copper onto self-assembled gold nanoparticles. Reproducible patterning of single Au nanoparticles on silicon substrates by scanning probe oxidation and self-assembly
• Abstracts: Chemically fabricated magnetic quantum dots of InP:Mn. Field-directed self-assembly of magnetic nanoparticles
• Abstracts: Optimization of high-yield biological synthesis of single-crystalline gold nanoplates. In situ synthesis and characterization of multiwalled carbon nanotube/Au nanoparticle composite materials
• Abstracts: Designed nanostructured Pt film for electrocatalytic activities by underpotential deposition combined chemical replacement techniques

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.