NCKU inventions win gold, silver at Geneva expo
Tainan, Taiwan, April 30, 2013
A research team led by Wen-Chau Liu, Distinguished Professor of Institute of Microelectronics and Director of High Speed Devices Lab at National Cheng Kung University (NCKU), southern Taiwan, has taken home with one gold and one silver medal at 41th Swiss Geneva International Exhibition of Inventions for its “ZnO Nanostructure-Based Gas Sensors” and “High-Power GaN-Based Light Emitting Diodes with a 3D-PhC Reflector Structure” respectively.
The gold-winner, “ZnO Nanostructure-Based Gas Sensors”, is a novel devise to detect ammonia gas, which involves transformation of cross-linked ZnO-nanorods configuration and the decoration of Pt nanoparticles.
According to Prof. Liu, ammonia is dangerous and toxic gas and the value of ammonia concentration for immediate danger to life is 300 ppm and the lowest explosive limit is 15%.
The novel devise, compared with other ammonia sensors, is small in size (smaller than half of one euro coin), with low power consumption (lower than 1 mW), and low cost (lower than 1 dollar). It also shows 97 times improvement of sensitivity and low detection limit ability.
Prof. Liu noted that the devise can be applied to chemical plant ammonia leak detection, semiconductor process ammonia leak detection, biochemical technology leakage, agricultural fertilizers, refrigeration and other industrial processes ammonia leak detection.
The silver-winning “High-Power GaN-Based Light Emitting Diodes with a 3D-PhC Reflector Structure” is high-power LED in which a self-assembled 100 nm SiO2 nanosphere monolayer is coated to enhance the brightness.
It is smaller than a quarter of one euro coin with longer lifetime up to 5 years, energy saving and carbon reduction, according to Liou Jian-Kai who is a student in Prof. Liu’s team.
He said, comparing with the existing high-power LEDs, the light output power, luminous flux, and illuminance of the newly-innovated LEDs could be significantly improved up to 20% without the degradation of electrical properties.
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A research team led by Wen-Chau Liu, Distinguished Professor of Institute of Microelectronics and Director of High Speed Devices Lab at National Cheng Kung University (NCKU), southern Taiwan, has taken home with one gold and one silver medal at 41th Swiss Geneva International Exhibition of Inventions for its “ZnO Nanostructure-Based Gas Sensors” and “High-Power GaN-Based Light Emitting Diodes with a 3D-PhC Reflector Structure” respectively.
The gold-winner, “ZnO Nanostructure-Based Gas Sensors”, is a novel devise to detect ammonia gas, which involves transformation of cross-linked ZnO-nanorods configuration and the decoration of Pt nanoparticles.
According to Prof. Liu, ammonia is dangerous and toxic gas and the value of ammonia concentration for immediate danger to life is 300 ppm and the lowest explosive limit is 15%.
The novel devise, compared with other ammonia sensors, is small in size (smaller than half of one euro coin), with low power consumption (lower than 1 mW), and low cost (lower than 1 dollar). It also shows 97 times improvement of sensitivity and low detection limit ability.
Prof. Liu noted that the devise can be applied to chemical plant ammonia leak detection, semiconductor process ammonia leak detection, biochemical technology leakage, agricultural fertilizers, refrigeration and other industrial processes ammonia leak detection.
The silver-winning “High-Power GaN-Based Light Emitting Diodes with a 3D-PhC Reflector Structure” is high-power LED in which a self-assembled 100 nm SiO2 nanosphere monolayer is coated to enhance the brightness.
It is smaller than a quarter of one euro coin with longer lifetime up to 5 years, energy saving and carbon reduction, according to Liou Jian-Kai who is a student in Prof. Liu’s team.
He said, comparing with the existing high-power LEDs, the light output power, luminous flux, and illuminance of the newly-innovated LEDs could be significantly improved up to 20% without the degradation of electrical properties.
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