We report on a new method to prepare large quantity single-walled carbon nanotubes (SWCNTs) with high purity.Using a Y-Ni powder composite graphite rod as an an
An optical spectroscopic observation was made towards the circumstellar nebula of the supergiant VI Cyg 12, for the first time to the best of our knowledge. Sev
Recent experiments have demnonstrated that the light pressure force from an optical standing wave (SW) focuses an atomic beam to sub-micrometre dimensions. We s