Browsing by Author Nguyen, Hoang Nam

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  • 21.pdf.jpg
  • Article


  • Authors: Luu, Manh Quynh; Nguyen, Thi Tra My; Bui, Thi Hong Nhung; Nguyen, Hoang Nam (2016)

  • ZnS quantum dots (QDs) are prepared by ultrasonic-assisted chemical precipitation method with the presence of different concentration Trisodium citrate (TSC). The TSC molecules play very important role in inhibiting the growth of the ZnS particles. The mean size of the ZnS crystals which is estimated from the X-ray diffractions decreases from 1.7 nm to 1.4 nm when the added amount of the TSC increases. The lattice constant of the particles decreases from 5.40 Å to 5.38 Å and the band gap of the material increases from 3.92 eV to 4.74 eV. The particles are well dispersive in aqueous solution and emit blue light at around 430 nm while being excited by 320 nm ultraviolet light, which gu...

  • Synthesis-of-ZnS-Mn-Fe3O4-bifunctional-nanoparticles-by-inverse-microemulsion-method_2016_Journal-of-Science-Advanced-Materials-and-Devices.pdf.jpg
  • Article


  • Authors: Chu, Tien Dung; Luu, Manh Quynh; Nguyen, Phuong Linh; Nguyen, Hoang Luong; Nguyen, Hoang Nam (2016)

  • ZnS:Mn- Fe3O4 bifunctional nanoparticles were synthesized by inverse microemulsion method for biomedicine applications. The bifunctional nanoparticles were combined from prepared ZnS:Mn and Fe3O4 nanoparticles in a SiO2 cover matrix. Results show that bifunctional nanoparticles, apart from exhibiting magnetism, have photoluminescence properties, which support the applications targeting biomedicine fluorescent diagnostics as well as magnetic cell sorting or drug delivery.

  • 25.pdf.jpg
  • Article


  • Authors: Chu, Tien Dung; Luu, Manh Quynh; Tran, Thi Hong; Nguyen, Hoang Nam (2017)

  • In this paper, Fe3O4-ZnO heterostructure multifunctional nanoparticles (NPs) were successfully prepared in aqueous solution by ultrasound assisted thermolysis. First, iron oxide (Fe3O4) magnetic NPs were prepared by co-precipitation method. The Fe3O4 NPs were modified by 3-aminopropyltriethoxysilane (APTES) to have free amine (-NH2) groups on their surface, then, Zn2+ ions were added and stirred to adsorb onto the surface of Fe3O4-NH2 NPs in alkaline solution at a pH of 11. This solution was decomposed through thermolysis in ultrasound bath. The results of measurements show that photoluminescence of Fe3O4-ZnO heterostructure multifunctional NPs was enhanced in visible light at 565 nm ...

  • 63.pdf.jpg
  • Article


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

  • Hard magnetic properties of magnetic nanoparticles FePd were investigated in dependence of temperature. Magnetic nanoparticles FePd were prepared from palladium acetate and iron acetate by sonoelectrochemistry, an useful technique to make metallic nanoparticles using ultrasound. Upon the annealing at 450°C to 650°C samples have ordered L10 structure and show hard magnetic properties with high coercivity up to 2.1 kOe at room temperature and increases to 2.43 kOe with decreasing temperature down to 2 K.

Browsing by Author Nguyen, Hoang Nam

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 10 to 13 of 13
  • 21.pdf.jpg
  • Article


  • Authors: Luu, Manh Quynh; Nguyen, Thi Tra My; Bui, Thi Hong Nhung; Nguyen, Hoang Nam (2016)

  • ZnS quantum dots (QDs) are prepared by ultrasonic-assisted chemical precipitation method with the presence of different concentration Trisodium citrate (TSC). The TSC molecules play very important role in inhibiting the growth of the ZnS particles. The mean size of the ZnS crystals which is estimated from the X-ray diffractions decreases from 1.7 nm to 1.4 nm when the added amount of the TSC increases. The lattice constant of the particles decreases from 5.40 Å to 5.38 Å and the band gap of the material increases from 3.92 eV to 4.74 eV. The particles are well dispersive in aqueous solution and emit blue light at around 430 nm while being excited by 320 nm ultraviolet light, which gu...

  • Synthesis-of-ZnS-Mn-Fe3O4-bifunctional-nanoparticles-by-inverse-microemulsion-method_2016_Journal-of-Science-Advanced-Materials-and-Devices.pdf.jpg
  • Article


  • Authors: Chu, Tien Dung; Luu, Manh Quynh; Nguyen, Phuong Linh; Nguyen, Hoang Luong; Nguyen, Hoang Nam (2016)

  • ZnS:Mn- Fe3O4 bifunctional nanoparticles were synthesized by inverse microemulsion method for biomedicine applications. The bifunctional nanoparticles were combined from prepared ZnS:Mn and Fe3O4 nanoparticles in a SiO2 cover matrix. Results show that bifunctional nanoparticles, apart from exhibiting magnetism, have photoluminescence properties, which support the applications targeting biomedicine fluorescent diagnostics as well as magnetic cell sorting or drug delivery.

  • 25.pdf.jpg
  • Article


  • Authors: Chu, Tien Dung; Luu, Manh Quynh; Tran, Thi Hong; Nguyen, Hoang Nam (2017)

  • In this paper, Fe3O4-ZnO heterostructure multifunctional nanoparticles (NPs) were successfully prepared in aqueous solution by ultrasound assisted thermolysis. First, iron oxide (Fe3O4) magnetic NPs were prepared by co-precipitation method. The Fe3O4 NPs were modified by 3-aminopropyltriethoxysilane (APTES) to have free amine (-NH2) groups on their surface, then, Zn2+ ions were added and stirred to adsorb onto the surface of Fe3O4-NH2 NPs in alkaline solution at a pH of 11. This solution was decomposed through thermolysis in ultrasound bath. The results of measurements show that photoluminescence of Fe3O4-ZnO heterostructure multifunctional NPs was enhanced in visible light at 565 nm ...

  • 63.pdf.jpg
  • Article


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

  • Hard magnetic properties of magnetic nanoparticles FePd were investigated in dependence of temperature. Magnetic nanoparticles FePd were prepared from palladium acetate and iron acetate by sonoelectrochemistry, an useful technique to make metallic nanoparticles using ultrasound. Upon the annealing at 450°C to 650°C samples have ordered L10 structure and show hard magnetic properties with high coercivity up to 2.1 kOe at room temperature and increases to 2.43 kOe with decreasing temperature down to 2 K.