Enhancement of optical and magneto-optical effects in three-dimensional opal/Fe3O4 magnetic photonic crystals (vol 93,art no 072502, 2008)

Contains fulltext : 72285.pdf (publisher's version ) (Open Access)3 p

White Nanoluminophores Based on Monodisperse Carbon Nanodots Modified with Europium Ions

Monodisperse carbon nanodots modified with europium ions possessing photoluminescence in the entire visible region of the spectrum were synthesized by the template method. The chemical composition and structure of the resulting white nanoluminophore were studied by X ray spectral and microscopic method

Scanning tunneling spectroscopy study of silicon and platinum assemblies in an opal matrix

Scanning tunneling microscopy and scanning tunneling spectroscopy (STS) are used to investigate the local electronic behavior of Pt-Si nanostructures fabricated in an opal matrix formed by silica spheres of 250 nm diameter. Si and Pt are regularly distributed inside the opal pores and form nanoscale metal-semiconductor-metal junctions. Normalized differential conductance curves enable us to study the distribution of Pt and Si and to detect the presence of regions showing a surface band gap in the range 0.5-0.8 eV, possibly associated with the formation of silicides. STS appears as a suitable technique for the electrical characterization of opal-based nanostructures