Browsing by Author "Hsieh, Sheng-Jen"

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A flexible public cloud based testing service for heterogeneous testing targets
(2014)
Hsieh, Sheng-Jen
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Luo, Guo-Heng
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Yuan, Shyan-Ming
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Chen, Hsiao-Wei
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資訊工程學系
To guarantee quality of the service, services need to be tested to ensure the service quality. But most of existing testing service can\'t provide multi-type testing and deploy testing clients concurrently in different regions. To overcome these problems, in this paper, a cloud testing service combine cloud computing and multi-testing tools is proposed. Using the proposed service user can deploy the testing clients in different countries to access the testing targets, when the testing is finish user can easily get both of detail and summarized test results. To show the capabilities of proposed service, an experiment is performed. The results shows that the proposed service can guarantee testing quality, automatically deploy testing clients concurrently in different region, get latency from different countries, and perform press testing.
A mechanism for the formation of annealed compact oxide layers at the interface between anodic titania nanotube arrays and Ti foil
(2009-06-01)
Chen, Chien-Chon
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Say, Wen C.
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Hsieh, Sheng-Jen
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Diau, Eric Wei-Guang
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應用化學系
We propose a mechanism for the growth of crystalline anodic titanium-oxide (ATO) nanochannel arrays based on thermodynamic considerations and structural imperfections. Both amorphous and crystalline ATO films were obtained from the anodization of a titanium foil. Amorphous ATO nanotubes have a single-layer form, which makes them inefficient for use in photo-catalytic and solar-cell applications. Annealed ATO nanotubes are considered non-stoichiometric if the effect of oxygen partial pressure on the composition is significant. The driving force behind growing crystalline ATO nanotubes is the drawing of oxygen from the atmosphere to the oxygen site, which consequently decreases the concentration of oxygen vacancies in the anatase phase. The small ionization energies of titanium ions produce the stoichiometric defects. A diagram showing Gibbs energy and Kroger-Vink notation to indicate the strong influence of the non-stoichiometric ATO structure is deduced.
Fabrication of bismuth nanoballs using thermal oil reflow
(2008-11-01)
Kuo, Chin-Guo
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Chen, Chien-Chon
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Hsieh, Sheng-Jen
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Say, Wen C.
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應用化學系
Sub-micron-size bismuth (Bi) balls with diameters between 100 and 2000 nm were formed on an anodic aluminum oxide (AAO) template using thermal expansion and thermal oil reflow processes. After centrifugal force separation, 100 nm size Bi balls were obtained. In addition, the ball density was approximately 6 x 10(7)/cm(2) on an AAO surface. Because of their round shape, the contact angle of the Bi nanoballs on the AAO surface was large after hot oil reflow, making it easy to remove them using ultrasound and to separate different sizes of balls using centrifugal force. (C) 2008 The Ceramic society of Japan. All rights reserved.
Highly Sensitive Arrayed Indium-Antimony Nanowires for Infrared Detection
(2015-01-01)
Chen, Po-Chun
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Chen, Chien-Chon
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Chen, Shih-Hsun
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Chou, Chung-Yi
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Hsieh, Sheng-Jen
The objective of this study is to achieve a high sensitive infrared detector by fabricating highly ordered array of indium-antimony (In-Sb) nanowires which is a semiconductor material. The approach is to investigate an infrared detector with arrayed nanowires which can transport signals in one dimension to obtain high efficiency and sensitivity compared with In-Sb by using traditional thin film fabrications. This research expects to provide an infrared detector by fabricating III-V alloy nanowires to highly improve the resolution of infrared signal. To develop scaled-up functional devices, highly ordered nanowire arrays are essential building blocks. Many candidate materials (metals, alloys, oxides and semiconductors) have been studied for various potential applications in nanotechnology and have shown some promising results. The solid metallic nanowires have been exploited for a wide range of applications to take the advantages of their large length/diameter aspect ratio. Further development to synthesize nanowires efficiently at lower cost is the direction for manufacturing next generation nanodevices. In this study, various diameters of ordering nanowires, from 10 nm to 500 nm, were fabricated and evaluated the performance of the sensitivity of infrared detection. Moreover, a 1 inch plate, which can be regarded as a device, with nanowires array was fabricated by designing a new type of processing chamber.