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Browsing by Author Nguyen, Dang Phu

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  • 108.pdf.jpg
  • Article

  • Arsenic removal from water by magnetic Fe1-xFe2O4 and Fe1-yNiy Fe2O4 nanoparticles

    • Authors: Nguyen, Hoang Hai; Nguyen, Dang Phu (2009)

  • This paper studied the effects of Co, Ni replacement in the nanoparticles, pH, weight of nanoparticles/ml of qater and time of stirring on the arsenic removal ability. The removal was also affected by the pH of the water. The presence of Ni improved the absorption in most cases.
  • 62.pdf.jpg
  • Article

  • Effect of preparation conditions on optical properties of CdTe quantum dot dispersed in water

    • Authors: Nguyen, Van Hung; Duong, Anh Tuan; Trinh, Duc Thien; Nguyen, Dang Phu; Danh, Bich Do; Pham, Van Vinh (2012)

  • CdTe quantum dots dispersed in water were prepared successfully by the microwave irradiation method. The influence of the pH value of the solution precursor, irradiation time and microwave power on the structure, size and optical properties of CdTe quantum dots was investigated. The fluorescence of CdTe quantum dots studies were illustrated that the samples which were synthesized at pH value of 7 exhibited the best fluorescence. The absorption, fluorescence spectra and TEM images showed that the microwave power and the irradiation time influenced significantly on the size of CdTe quantum dot as well as their optical properties. The fluorescence spectra were red-shift with the increase...
  • 106.pdf.jpg
  • Article

  • Effect of the preparation conditions on the properties of Fe-Pt nanoparticles produced by sonoelectrodeposition

    • Authors: Nguyen, Hoang Luong; Nguyen, Hoang Hai; Nguyen, Dang Phu (2009)

  • Fe-Pt materials have been widely prepared by vacuum evaporation technique. Recently, chemical and physicochemical methods have been successfully used to make Fe-Pt nanoparticles, thin films. This paper reported another physicochemical method, namely sonoelectrodeposition, to produce Fe-Pt nanoparticles. In the sonoelectrodeposition, the electrodeposition process was assisted with a sonicator. The Ti horn of the sonicator played a role as the cathode on which Fe-Pt nanoparticles were deposited. After a certain time of deposition, a sonic pulse was applied to remove the particles from the Ti cathode. The composition of Fe-Pt particles can be controlled by changing the concentration of F...
  • 58.pdf.jpg
  • Article

  • Magnetic memory effect in FePd nanoparticles prepared by sonoelectrochemistry

    • Authors: Nguyen, Thi Thanh Van; Truong, Thanh Trung; Nguyen, Dang Phu; Nguyen, Hoang Nam; Nguyen, Hoang Hai (2012)

  • Magnetic memory effect was newly observed in hard magnetic FePd nanoparticles prepared by sonoelectrochemistry. The applied magnetic field was changed in defined protocols during the magnetic relaxation process and the magnetic memory effect occurs when the field changes are larger than the critical field change of around 25 Oe. This magnetic memory effect can be explained by the magnetic reversal processes in strong interaction systems. The width of the energy barrier distribution of these hard magnetic particles is related to the critical field change deduced from this study.

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Browsing by Author Nguyen, Dang Phu

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 4 of 4
  • 108.pdf.jpg
  • Article

  • Arsenic removal from water by magnetic Fe1-xFe2O4 and Fe1-yNiy Fe2O4 nanoparticles

    • Authors: Nguyen, Hoang Hai; Nguyen, Dang Phu (2009)

  • This paper studied the effects of Co, Ni replacement in the nanoparticles, pH, weight of nanoparticles/ml of qater and time of stirring on the arsenic removal ability. The removal was also affected by the pH of the water. The presence of Ni improved the absorption in most cases.
  • 62.pdf.jpg
  • Article

  • Effect of preparation conditions on optical properties of CdTe quantum dot dispersed in water

    • Authors: Nguyen, Van Hung; Duong, Anh Tuan; Trinh, Duc Thien; Nguyen, Dang Phu; Danh, Bich Do; Pham, Van Vinh (2012)

  • CdTe quantum dots dispersed in water were prepared successfully by the microwave irradiation method. The influence of the pH value of the solution precursor, irradiation time and microwave power on the structure, size and optical properties of CdTe quantum dots was investigated. The fluorescence of CdTe quantum dots studies were illustrated that the samples which were synthesized at pH value of 7 exhibited the best fluorescence. The absorption, fluorescence spectra and TEM images showed that the microwave power and the irradiation time influenced significantly on the size of CdTe quantum dot as well as their optical properties. The fluorescence spectra were red-shift with the increase...
  • 106.pdf.jpg
  • Article

  • Effect of the preparation conditions on the properties of Fe-Pt nanoparticles produced by sonoelectrodeposition

    • Authors: Nguyen, Hoang Luong; Nguyen, Hoang Hai; Nguyen, Dang Phu (2009)

  • Fe-Pt materials have been widely prepared by vacuum evaporation technique. Recently, chemical and physicochemical methods have been successfully used to make Fe-Pt nanoparticles, thin films. This paper reported another physicochemical method, namely sonoelectrodeposition, to produce Fe-Pt nanoparticles. In the sonoelectrodeposition, the electrodeposition process was assisted with a sonicator. The Ti horn of the sonicator played a role as the cathode on which Fe-Pt nanoparticles were deposited. After a certain time of deposition, a sonic pulse was applied to remove the particles from the Ti cathode. The composition of Fe-Pt particles can be controlled by changing the concentration of F...
  • 58.pdf.jpg
  • Article

  • Magnetic memory effect in FePd nanoparticles prepared by sonoelectrochemistry

    • Authors: Nguyen, Thi Thanh Van; Truong, Thanh Trung; Nguyen, Dang Phu; Nguyen, Hoang Nam; Nguyen, Hoang Hai (2012)

  • Magnetic memory effect was newly observed in hard magnetic FePd nanoparticles prepared by sonoelectrochemistry. The applied magnetic field was changed in defined protocols during the magnetic relaxation process and the magnetic memory effect occurs when the field changes are larger than the critical field change of around 25 Oe. This magnetic memory effect can be explained by the magnetic reversal processes in strong interaction systems. The width of the energy barrier distribution of these hard magnetic particles is related to the critical field change deduced from this study.