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 395
- Downloads 0
A Novel Rhodopsin Gene from Octopus vulgaris for Optobioelectronics Materials
The unique photochromic retinal protein from rhabdomeric octopus membranes – octopus rhodopsin (OctR) has emerged as promising material for biomolecular photonic applications due to its unique properties and advantages....
Mimosa pudica Flower Extract Mediated Green Synthesis of Gold Nanoparticles
The use of Mimosa pudica flower extract in the synthesis of highly stable gold nanoparticles (AuNPs) is reported here. On treatment of aqueous chloroauric acid with crude aqueous extract of Mimosa pudica flowers, rapid r...
Protein Crystallization by Anodic Porous Alumina (APA) Template: The Example of Hen Egg White Lysozyme (HEWL)
In this communication, we report anodic porous alumina (APA) template induced crystallization. The APA nanotemplate was prepared on the glass substrate for the hen egg white lysozyme (HEWL) crystal growth. The changes in...
Acknowledgement of Manuscript Reviewers NWJ Volume-1 (2015)
The Editors of NanoWorld Journal (NWJ) would like to express their tremendous gratitude to all those individuals who participated in the peer review process during the preparation of this Volume-1 (2015). Many reviewers...
Epitaxial Growth of Ruthenium Dioxides on Ru(0001) Surface
The epitaxial growth of the RuO2 clusters on Ru(0001) electrode formed by electrooxidation in HClO4 solution has been studied by ex-situ reflection high energy electron diffraction (RHEED), low energy electron diffractio...