High Efficiency Preparation, Structure and Properties of Silicon Nano-Crystals by Induction Plasma Method
Journal Title: NanoWorld Journal - Year 2016, Vol 2, Issue 3
Abstract
Free-standing silicon nano-crystals were synthesized from silicon multicrystals with high efficiency by induction plasma method. The particle morphology and distribution of nano powder were significantly influenced by powder feed rate, induction plasma power and the ratio of sheath gas. The average particle size monotonously increased with the increase of powder feed rate. The nano powder distribution became more and more concentrated as induction plasma power increased. The average size of nanopowder decreased obviously with the increase of H2 proportion. After the optimization of plasma parameters, mono-dispersed silicon nano-crystals were obtained with an average diameter of 20-85 nm and the mass yield reached a high level as 327 g/h. Meanwhile, the precursor utilization rate exceeded 81.8%. Under the TEM observation, all free-standing silicon nano-crystals had a uniform composition with a single crystal surrounded by a 1-2 nm thick amorphous silicon oxide shell. Although amorphous-like component was detected by Raman spectroscopy, the ensemble of silicon nano-crystals still showed a good crystallinity. The photoluminescence spectrum showed emission peaks in green region around 558 nm, which can be attributed to the oxide-related surface state of silicon nano-crystals.
Authors and Affiliations
Wen-zhi Yang, Wei-ming Huang, Qiang Zheng, Wei Huang, Zi-ming Chen, Fu-jun Shang, Bao-yu Zhang
Keywords
Related Articles
- EP ID EP223429
- DOI 10.17756/nwj.2016-032
- Views 381
- Downloads 0
Langmuir-Blodgett Technology for Drugs Production and Delivery: Insights and Implications from an In Silico Study
Insulin dynameomics here reported as a database pertaining to a series of Molecular Dynamics (MD) ran for Protein Data Bank (PDB) entries consisting in bioinformatics and molecular dynamics simulation of Langmuir-Blodget...
Regenerative Medicine on the Verge of the 4th Industrial Revolution: What We May Envision When the Physical, the Biological and the Digital Converge
Rhythmic oscillatory patterns permeate the entire universe and sustain cellular dynamics at biological level. There is compelling evidence that our cells are sensitive to physical stimulation and can be exposed to physic...
NAPPA-Based Vaccines for a New Proteogenomics Approach for Public Health
Vaccinology was developed for the first time in 1796 when Jenner empirically implemented a vaccine against smallpox using animal-to-human cowpox inoculation. Since then, it has become a very complex science due to the me...
One Step Tissue Engineering for Cartilage Reconstruction in Severe Osteoarthritis of the Knee and Ankle: A Comprehensive Review of the Technique Resorting to Isolated BMAC or ADSCS and their Last Combination
An innovative clinical procedure has provided evidence that wide areas of severe cartilage defects due to osteoarthritis of the inferior limb, Kellgren stage I to III, in particular knee and ankle, can be successfully re...
Metallic Alloy Nanoparticles and Metal-Semiconductor Nanomaterials
While bridging the gap between the atomic structures and bulk matters, nanomaterials are of great interests for fundamental understanding as well as for different application perspectives. In this article, it is proposed...