Heterogeneous seeded growth

Synthesis and characterization of bifunctional Fe3O4/ZnO core/shell nanocrystals

Weesiong Chiu, Poisim Khiew, Michael Cloke, Dino Isa, Hongngee Lim, Thiankhoon Tan, Nayming Huang, Shahidan Radiman, Roslan Abd. Shukor, Muhammad Azmi Abdul Hamid, Chin Hua Chia

Research output: Contribution to journalArticle

65 Citations (Scopus)

Abstract

In the present study, Fe3O4/ZnO core/shell nanocrystals (NCs) are synthesized via seed-meditated growth approach in nonhydrolytic condition. The controlling process of thermal pyrolysis of zinc acetate (ZnAc) renders a condition to overgrow ZnO layer on the surface of Fe3O4 NCs (seeds). The transmission electron microscope (TEM) micrograph shows that Fe3O4/ZnO NCs are spherical in shape, highly monodispersed, and exhibiting responding shell thickness by varying the mole ratio of seed to shell precursor. The X-ray powder diffraction patterns (XRD) for Fe3O4/ZnO NCs reveal the coexistence of both Fe3O4 and ZnO crystal structures, which the patterns can be well indexed with the standard powder diffraction patterns of both materials. The NCs exhibit superparamagnetism corresponding to an external magnet field provided by vibrating sample magnetometer (VSM) and show red-shift phenomenon under UV excitation at room temperature. The NCs are magnetically separable upon application of 0.6 T magnet, which shows that high potentiality of the NCs to be used as regenerable catalyst material.

Original languageEnglish
Pages (from-to)8212-8218
Number of pages7
JournalJournal of Physical Chemistry C
Volume114
Issue number18
DOIs
Publication statusPublished - 13 May 2010

Fingerprint

Nanocrystals
nanocrystals
synthesis
Seed
seeds
Diffraction patterns
Magnets
magnets
diffraction patterns
Zinc Acetate
Superparamagnetism
Magnetometers
red shift
X ray powder diffraction
magnetometers
pyrolysis
acetates
Pyrolysis
Zinc
Electron microscopes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films
  • Energy(all)

Cite this

Heterogeneous seeded growth : Synthesis and characterization of bifunctional Fe3O4/ZnO core/shell nanocrystals. / Chiu, Weesiong; Khiew, Poisim; Cloke, Michael; Isa, Dino; Lim, Hongngee; Tan, Thiankhoon; Huang, Nayming; Radiman, Shahidan; Abd. Shukor, Roslan; Abdul Hamid, Muhammad Azmi; Chia, Chin Hua.

In: Journal of Physical Chemistry C, Vol. 114, No. 18, 13.05.2010, p. 8212-8218.

Research output: Contribution to journalArticle

Chiu, Weesiong ; Khiew, Poisim ; Cloke, Michael ; Isa, Dino ; Lim, Hongngee ; Tan, Thiankhoon ; Huang, Nayming ; Radiman, Shahidan ; Abd. Shukor, Roslan ; Abdul Hamid, Muhammad Azmi ; Chia, Chin Hua. / Heterogeneous seeded growth : Synthesis and characterization of bifunctional Fe3O4/ZnO core/shell nanocrystals. In: Journal of Physical Chemistry C. 2010 ; Vol. 114, No. 18. pp. 8212-8218.
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