Prolonging wear life of amorphous carbon films under vacuum was an enormous challenge. In this work, we firstly reported that amorphous carbon film as a lubricant layer containing hydrogen, oxygen, fluorine and silicon (a-C:H:O:F:Si) exhibited low friction (~0.1), ultra-low wear rate (9.0 × 10(-13) mm(3) N(-1) mm(-1)) and ultra-long wear life (>2 × 10(6) cycles) under high vacuum. We systematic...

This paper includes an overview of general approaches and efforts to enhance the power conversion efficiency in dye-sensitized solar cells (DSC) and then the recent development of hierarchically structured photoelectrodes for DSC. Hierarchically structured photoelectrodes are made of submicron-sized aggregates of ZnO nanocrystallites. Such structured photoelectrodes retain the desired large sur...

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The microstructure, electronic structure and chemical bonding of chromium carbide thin films with different carbon contents have been investigated with high-resolution transmission electron microscopy, electron energy loss spectroscopy and soft x-ray absorption-emission spectroscopies. Most of the films can be described as amorphous nanocomposites with non-crystalline CrC(x) in an amorphous car...

Enhanced cooperative absorption and upconversion emission of Yb pairs in nanocrystalline YAG is observed. The nanocrystallites synthesized by a modified sol–gel method have an average size of 96 nm. The estimated concentration normalized ratio of maximum visible absorption to maximum IR absorption emission of 7.55 · 10 22 cm is about four orders of magnitude higher than the highest reported val...

The silicon surface was modified in a single-pulse mode with femto-picosecond laser pulses (0.3 and 10 ps) the near-IR range (1030 nm) during ablation air water. resulting structures were studied using Raman microscopy. In course of study, it found that nanocrystallites size 7-8 nm appear at crater boundary. Local mechanical stresses center crater, sign which depends on applied energy density. ...