Hollow Channel Formation inside Sodium Aluminoborate Glass by Femtosecond Laser Writing and Distilled Water Etching

Recently, the effect of nanograting formation was demonstrated for binary sodium borate glass with the possibility of data storage with an enhanced level of security. The obvious disadvantage of such glass is poor chemical stability, which limits real applications. In this paper, we show that the introduction of Al2O3 allows preserving the possibility of nanograting formation with a significant increase of chemical resistance and thus to preserve optical memory applications. On the other hand, the possibility of selective etching of laser-written tracks by means of distilled water is revealed, which was not demonstrated for other types of glasses. The dependence of retardance of nanogratings form birefringence on laser writing parameters is established and discussed. Structural features of laser-modified microdomains are studied via Raman spectroscopy which revealed an increase of three-coordinated boron content. A possible mechanism of selective etching is discussed.

Activated mesoporous carbon nanofibers fabricated using water etching-assisted templating for high-performance electrochemical capacitors

Activated mesoporous carbon nanofibers are synthesized by a sequential process of electrospinning, water etching-assisted templating, and acid treatment, which exhibit outstanding capacitive performance.

Preparation of a porous nanostructured germanium from GeO2via a “reduction–alloying–dealloying” approach

Electrochemical reduction-cum-alloying in molten salt and subsequent water-etching dealloying for the controllable, affordable and environmentally friendly preparation of nanoporous germanium.