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Browsing by Author Pham, Hong Quang

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  • Electrochemical quartz crystal microbalance study of electrodeposition of copper-selenium thin films

    • Authors: Dang, Thi Bich Hop; Pham, Hong Quang; Do, Thi Kim Anh; Do, Phuc Quan; Ngo, Dinh Sang (2013)

  • The deposition of Copper-Selenium thin films was studied by using a combination of Cyclic Voltammetry (CV) and Electrochemical Quartz Crystal Microbalance (EQCM). The values of the equivalent atomic mass (M/z) grown at the gold EQCM sensor during electrodeposition at varying potentials and constant potentials were analyzed to understand the mechanism of the growing process. The composition of the films determined by EDS supports the assumption of the deposition process which is based on the EQCM studies. The obtained results indicate the role of sulfamic acid as a comlexing agent. The concentration of 20 mM of sulfamic acid and the growing potential of - 0.9 V were found to be the mo...
  • 58.pdf.jpg
  • Article

  • Study of the Effect of Sulfamic Acid on Formation Cu-Se Compounds by CV and EQCM

    • Authors: Dang, Thi Bich Hop; Pham, Hong Quang; Do, Thi Kim Anh; Do, Phuc Quan (2014)

  • A combination of Cyclic Voltammetry (CV) and Electrochemical Quartz Crystal Microbalance (EQCM) has been used to study the effect of sulfamic acid as a complexing agent on the formation of Cu-Se compounds. It has been found that sulfamic acid does not affect the deposition of Cu in the absent of Se. However, when Cu and Se are simultaneously, sulfamic acid was found to affect strongly the formation of Cu-Se compounds, namely it causes and facilitates the reactions forming Cu-Se compounds. Furthermore, at high concentration, sulfamic acid causes a mass-loss process, leading to a change of composition and a poor surface morphology. A suitable concentration of sulfamic acid can be concer...

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Browsing by Author Pham, Hong Quang

Jump to: 0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
or enter first few letters:  
Showing results 1 to 2 of 2
  • 79.pdf.jpg
  • Article

  • Electrochemical quartz crystal microbalance study of electrodeposition of copper-selenium thin films

    • Authors: Dang, Thi Bich Hop; Pham, Hong Quang; Do, Thi Kim Anh; Do, Phuc Quan; Ngo, Dinh Sang (2013)

  • The deposition of Copper-Selenium thin films was studied by using a combination of Cyclic Voltammetry (CV) and Electrochemical Quartz Crystal Microbalance (EQCM). The values of the equivalent atomic mass (M/z) grown at the gold EQCM sensor during electrodeposition at varying potentials and constant potentials were analyzed to understand the mechanism of the growing process. The composition of the films determined by EDS supports the assumption of the deposition process which is based on the EQCM studies. The obtained results indicate the role of sulfamic acid as a comlexing agent. The concentration of 20 mM of sulfamic acid and the growing potential of - 0.9 V were found to be the mo...
  • 58.pdf.jpg
  • Article

  • Study of the Effect of Sulfamic Acid on Formation Cu-Se Compounds by CV and EQCM

    • Authors: Dang, Thi Bich Hop; Pham, Hong Quang; Do, Thi Kim Anh; Do, Phuc Quan (2014)

  • A combination of Cyclic Voltammetry (CV) and Electrochemical Quartz Crystal Microbalance (EQCM) has been used to study the effect of sulfamic acid as a complexing agent on the formation of Cu-Se compounds. It has been found that sulfamic acid does not affect the deposition of Cu in the absent of Se. However, when Cu and Se are simultaneously, sulfamic acid was found to affect strongly the formation of Cu-Se compounds, namely it causes and facilitates the reactions forming Cu-Se compounds. Furthermore, at high concentration, sulfamic acid causes a mass-loss process, leading to a change of composition and a poor surface morphology. A suitable concentration of sulfamic acid can be concer...