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Published on: June 18, 2013
Hierarchical Cd4SiS6/SiO2 Heterostructure Nanowire Arrays
Jian Liu1, Chunrui Wang, Qingqing Xie
1Department of Applied Physics and State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, 2999 Renmin Rd, North, 201620, Songjiang District, Shanghai, People's Republic of China. crwang@dhu.edu.cn.
Nanoscale Research Letters
|July 24, 2010
Summary
Novel hierarchical cadmium sulfide/silicon dioxide (Cd4SiS6/SiO2) heterostructure nanowire arrays were successfully fabricated. These structures, grown on silicon, exhibit unique optical properties investigated via spectroscopy.
Area of Science:
- Materials Science
- Nanotechnology
- Solid State Chemistry
Background:
- Hierarchical nanostructures offer unique properties for advanced applications.
- Cadmium sulfide (CdS) and silicon dioxide (SiO2) are key materials in semiconductor research.
- Fabrication of complex heterostructures is crucial for novel device development.
Purpose of the Study:
- To fabricate novel hierarchical Cd4SiS6/SiO2 heterostructure nanowire arrays.
- To characterize the structural and morphological properties of the synthesized arrays.
- To investigate the optical properties of the Cd4SiS6/SiO2 heterostructures.
Main Methods:
- One-step thermal evaporation of CdS powder on silicon substrates.
- Characterization using scanning electron microscopy (SEM), X-ray diffraction (XRD), and transmission electron microscopy (TEM).
- Optical property analysis via Raman and Photoluminescence (PL) spectroscopy.
Main Results:
- Successful fabrication of vertically aligned hierarchical Cd4SiS6/SiO2 heterostructure nanowire arrays.
- Demonstration of a core-sheath structure: crystalline Cd4SiS6 core with amorphous SiO2 sheath.
- Observation of dense secondary SiO2 nanowires grown on the primary core-sheath structure.
- Proposed growth mechanism for the hierarchical arrays.
- Investigation of the Raman and PL spectra of the heterostructures.
Conclusions:
- A novel method for synthesizing hierarchical Cd4SiS6/SiO2 heterostructure nanowire arrays was established.
- The unique hierarchical structure was confirmed through advanced microscopy and diffraction techniques.
- The optical characteristics of these novel heterostructures were successfully investigated, paving the way for potential applications.
