Photoacoustic Effect of CdS Quantum Dot on TiO2

Authors

  • Tonnum Sujjaritturakarn Department of Physics, Faculty of Science, King Mongkut’s Institute of Technology Ladkrabang
  • Surachart Kamondilok Department of Physics, Faculty of Science, King Mongkut's Institute of Technology Ladkrabang, Chalongkrung, Ladkrabang, Bangkok 10520, Thailand.
  • Pichet Limsuwan Department of Physics, Faculty of Science, King Mongkut's Institute of Technology Ladkrabang, Chalongkrung, Ladkrabang, Bangkok 10520, Thailand.
  • Witoon Yindeesuk Department of Physics, Faculty of Science, King Mongkut's Institute of Technology Ladkrabang, Chalongkrung, Ladkrabang, Bangkok 10520, Thailand.

Keywords:

Photoacoustic, Cadmium sulfide, Quantum dots, Successive layer adsorption and reaction

Abstract

This paper studied the photoacoustic (PA) effect of cadmium sulfide quantum dots (CdS) on titanium dioxide (TiO2) nanoparticles prepared by successive layer adsorption and reaction (SILAR) method. The CdS quantum dots were done over TiO2 nanoparticles and CdS: TiO2 films with different SILAR cycles (0, 2, 4, 6, 8 cycles). The maximum acoustic signals measured were 179.8, 196.8, 221.5, 235.4 and 253.9 µV, respectively. In addition, the energy The resulting energy bandgap were 3.34, 2.82, 2.55, 2.5 and 2.35 eV, respectively. The results of the PA measurement showed that the increased number of SILAR cycles improved the visible absorption, and the maximum absorbance is a wavelength of 490 nm.

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Published

2022-06-30

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