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  1. No Access

    Article

    Synthesis, growing processes and physical properties of CdS nanoclusters in Y-zeolite studied by positron annihilation

    Direct synthesis of CdS nanoclusters within the pore structure of Y zeolite was made. The location of CdS nanoclusters inside Y zeolite hosts was confirmed by the blue-shifted reflection absorption spectra wit...

    Peng Hao, Ma Li, Wang Shao-Jie, Liu Shu-man… in Wuhan University Journal of Natural Scienc… (2000)

  2. No Access

    Article

    Defects in NTD InP probed by positron annihilation spectroscopy

    Two samples of high purity InP extracted from the same wafer were examined by positron annihilation spectrum analysis after having been, processed by means of thermal Neutron Transmutation Do** (NTD). Compar...

    Wen **ang-e, Li Shi-qing, Ma Li, Yan He-**… in Wuhan University Journal of Natural Scienc… (1999)

  3. No Access

    Article

    Defect properties of GaAs by positron annihilation

    Positron lifetime and Doppler Broadening spectra have been measured for three types of GaAs semiconductors. Direct evidence of native vacancy-type defects is found in the semi-insulating (SI-type) and n-type s...

    Chen Zhiquan, Ma Li, Li Shiqing, Yan Hepin… in Wuhan University Journal of Natural Scienc… (1996)