Our paper highlighted on Cover of Physica Status Solidi - Rapid Research Letters
Our paper highlighted on Cover of Physica Status Solidi - Rapid Research Letters
In the Rapid Research Letter on p. 100, Mihai Enachi et al. demonstrate that anodization of Ti sheets in ethylene glycol and HF containing electrolyte leads to the formation of ordered arrays of double-walled TiO2 nanotubes. Interestingly, the inner diameter can be tuned in the range from 10 nm to 250 nm through the change of the electrolyte temperature while the outer nanotube diameter and the density of nanotubes remain temperature independent. The authors present evidence for the formation of a self-organized surface nucleation layer that is genetically connected to the outer nanotube shell at the origin of this phenomenon. These findings pave the way for manufacturing ordered arrays of TiO2 nanotubes with modulated inner diameter by a simple change of the electrolyte temperature.
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La 12 iunie curent, comunitatea stiintifica a marcat cea de-a 62-a aniversare de la fondarea primelor institutii de tip academic. De aceasta data Consiliul Suprem pentru Stiinta si Dezvoltare Tehnologica al A.S.M. a programat citeva actiunii pentru aceasta zi. De dimineata mass-media a fost prezenta la Centrul national de studiu si testare a materialelor din cadrul Universitatii Tehnice a Moldovei, caruia ambasadorul extraordinar si plenipotentiar al Republicii Federale Germania in Republica Moldova, Excelenta sa dl Nikolaus von der Wenge, Graful Lambsdorff, i-a transmis un set de utilaj din partea Fundatiei "Alexander von Humboldt" din Germania. E vorba de un sistem performant de laser, in valoare de 20 mii de euro, odata cu punerea in functiune a caruia va spori, indiscutabil, nivelul tehnologic si de caracterizare a materialelor electronice si fotonice in acest centru cu impact pozitiv asupra dezvoltarii stiintei si a pregatirii cadrelor tinere. Deci, sarbatoarea nu a trecut fara de un cadou pretios.
In the Rapid Research Letter on p. 242 ff., titania nanotubes are proposed as building blocks of focusing elements. The design of photonic crystal (PC) - in particular concave - lenses on the basis of metallized nanotubes is found to result in excellent focusing of visible electromagnetic radiation. The lenses prove to be tolerant to disorder in the spatial arrangement of the nanotubes. Moreover, some disorder is even shown to improve the focusing properties.