Ordered nanoporous (NP) alumina (Al2O3) films were grown on Al substrates through a two-step electrochemical anodization process. The morphology as well the roughness are characterized by terahertz (THz) reflectometry and scattering imaging. In particular, we show that before second anodization, irregular surface of NP Al2O3 leads to significant THz scattering, whereas far more homogeneous foll...

In this communication, a new class of photonic materials, namely, two-dimensional titanium oxide-based photonic crystals, are proposed and were fabricated with an electrochemical anodization method. The high structural periodicity of the nanostructures, and the feasible variability of the chemical compositions help to realize tunable photonic bandgaps for selective light absorption in broad wav...

Aligned CoF2 nanochannel layers have been formed by self-ordering electrochemical anodization. In voltammograms these layers provide multiple oxidation states, an almost ideal rectangular pseudocapacitive behavior, a high specific capacitance and good capacitance retention. These layers may thus be promising for supercapacitor applications.