Related Experiment Video
Updated: Jul 7, 2026
07:47
Reverse Microemulsion-mediated Synthesis of Monometallic and Bimetallic Early Transition Metal Carbide and Nitride Nanoparticles
Published on: November 27, 2015
Nanoacorns: anisotropically phase-segregated CoPd sulfide nanoparticles.
Toshiharu Teranishi1, Youhei Inoue, Masafumi Nakaya
1School of Materials Science, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Tatsunokuchi, Nomi, Ishikawa 923-1292, Japan. teranisi@chem.tsukuba.ac.jp
Journal of the American Chemical Society
|August 12, 2004
Summary
Researchers synthesized unique cobalt-palladium sulfide nanoparticles, called CoPd nanoacorns, using a simple reduction method. These nanoacorns form spontaneously with distinct crystalline and amorphous phases at their interface.
Area of Science:
- Materials Science
- Nanotechnology
- Chemistry
Background:
- Nanoparticle synthesis is crucial for advanced materials.
- Controlling phase segregation in bimetallic nanoparticles is challenging.
- Understanding anisotropic growth mechanisms is key for tailored nanomaterials.
Purpose of the Study:
- To develop a method for synthesizing anisotropically phase-segregated CoPd sulfide nanoparticles.
- To investigate the spontaneous formation mechanism of these unique nanostructures.
- To characterize the crystalline and amorphous phases within the CoPd nanoacorns.
Main Methods:
- Reduction of cobalt and palladium precursors using 1,2-hexadecanediol.
- Inclusion of various alkanethiols during the synthesis process.
- Characterization of the resulting nanoparticles, including phase analysis and interface structure.
Main Results:
- Spontaneous generation of phase-segregated CoPd sulfide nanoparticles, termed "CoPd nanoacorns".
- Formation of nanoacorns composed of crystalline Co9S8 and amorphous PdSx phases.
- Identification of the Co9S8 (001) plane at the interface between the two phases.
- Anisotropic growth of the Co9S8 phase following the initial generation of PdSx nanoparticles.
Conclusions:
- A novel method for synthesizing CoPd nanoacorns with controlled phase segregation was established.
- The spontaneous formation mechanism involves anisotropic growth of the Co9S8 phase.
- The unique structure of CoPd nanoacorns holds potential for various applications in materials science.
