Browsing School of Pure and Applied Sciences by Author "Kinyua, Dickson Mwenda"

Now showing items 1-4 of 4

    • Gigahertz acoustic vibrations of Ga-doped ZnO nanoparticle array 

      Kinyua, Dickson Mwenda; Long, Hua; Xing, Xiangyuan; Njoroge, Stephen; Wang, Kai; Wang, Bing; Lu, Peixiang (IOP Science, 2019)
      In this work, we present an experimental study on the acoustic vibrations of ZnO nanoparticles array with different concentration of Ga dopings by using femtosecond pump-probe technique. The Ga-doped ZnO (GZO) nano-triangle ...

    • Influences of Ga doping on crystal structure and polarimetric pattern of SHG in ZnO nanofilms 

      Long, Hua; Habeeb, Ammar Ayesh; Kinyua, Dickson Mwenda; Wang, Kai; Wang, Bing; Lu, Peixiang (Multidisciplinary Digital Publishing Institute, 2019)
      The second-harmonic generation (SHG) in gallium doped ZnO (GZO) nanofilms was studied. The Ga doping in GZO nanofilms influenced the crystal structure of the films, which affected SHG characteristics of the nanofilms. In ...

    • Thermal Stress Monitoring on Piston Rings by Real Time Holographic Interferometry 

      Maina, Stephen N; Rurimo, Geoffrey K; Karimi, Patrick M; Kinyua, Dickson Mwenda; Ominde, Calvin F (Scientific Research Publishing, 2013)
      In this paper, real time holographic Interferometry (RTHI) technique was used to monitor the thermal stress on the piston rings. The piston rings holograms were recorded and the holographic plate replaced on the holder ...

    • Tuning the photoinduced charge transfer from CdTe quantum dots to ZnO nanofilms through Ga doping 

      Kinyua, Dickson Mwenda; Niu, Le; Long, Hua; Wang, Kai; Wang, Bing (Elsevier, 2019)
      Tuning the charge transfer rate between quantum dots (QDs) and metal oxide (MO) is important for improving the performances of QDs-MO devices. And tailoring the energy band of MO is one way to tune the charge transfer rate. ...