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KIST Develops New Process for Manufacturing Nano-Substances (Apr 8, 2013)
- Date : 2013-10-28
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Researchers at KIST have developed a manufacturing process for nano-substances that is easier, more economical and more environmentally friendly than existing procedures.
Dr. Sang Woo Kim of the Clean Energy Research Center and Dr. Jae Pyeong Ahn of the Property Analysis Center succeeded in developing technology for manufacturing multi-dimensional semiconductor nano-substances (nano-particles, nano-sheets, and nano-wire) by freely utilizing nano-particles as though assembling Lego blocks. Their research was published in the recent issue of Scientific Reports (the April issue), a sister magazine of Nature.
Multi-dimensional semiconductor nano-substances are now widely used in all areas of industry in catalysts, semiconductors, nano-elements, sensors and solar cells, but impurities such as mold (templates) or metallic growth catalyst arising from existing manufacturing procedures necessitate their later removal at significant expense and complexity.
KIST’s joint research team tackled both these issues by developing a technology for manufacturing nano-crystalloid nucleons into a higher-dimensional configuration by combining and disassembling them just like Lego blocks into a lower-dimensional configuration. This was achieved by reacting Gadolinium (Gd) and Cerium (Ce) within the mixed fluid of supercritical carbon dioxide-ethanol by using supercritical fluid technology without a template or growth catalyst.
It is highly anticipated that this technology will allow manufacturing of multi-dimensional nano-substances in a diverse range of materials by freely assembling them. It will now be possible to easily manufacture semiconductor nano-substances of high purity without a cleaning process, which considerably reduces environmental pollution.
In addition, the joint research team presented the possibility of nano-substance control using the supercritical fluid process, which sheds new light on the mechanism of generation and growth through micro-analysis of multi-dimensional nano-substances.