Today’s article

term: aerogel

Determination:

class of highly porous amorphous materials with bulk macrostructure where characteristic size of nanoelements is 4-10 nm; it is derived from agelin which theliquid component has been replaced with agas.

Description:

There are well-known aerogels based on amorphous oxides: silicon dioxide SiO2, aluminium oxide Al2O3, oxides of Cr, Sn, W, Fe, Li, Na, Ca, Mg, Ba, Sb, Te, Ni, Ge, Zn, Mn and other elements. In addition, carbon nanotube aerogels have ...

Today’s picture

optical fibre

Determination:

optical waveguide in the form of thin filament made of optically transparent material in which light is guided along the core.

Description:

The most widespread optical fibre (OF) is a thin quartz filament, the core of which has a refractive index greater than the refractive index of the shell. Single-mode quartz fibres are characterised by their uniquely low loss value of ~0.16 dB/km at the wavelength of 1.55 microns. ...