Browsing by Author "Chang, Hsin-Yu"

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Graphene oxide dot-based microstructures via dispersion and support of bovine serum albumin
(2016-10-01)
Chang, Hsin-Yu
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Lin, Chun-Yu
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Chang, Chia-Yuan
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Teng, Hsisheng
;
Campagnola, Paul J.
Three-dimensional graphene oxide-based microstructures have great potential for use in microelectronic and biomedical applications and can be fabricated by using two-photon excitation photochemical processes. In such excitation processes, rose Bengal is the preferred candidate as the photoactivator in two-photon crosslinking; nevertheless, it induces graphene oxide self-aggregation. Herein, bovine serum albumin (BSA) is adopted to prevent graphene oxide dot (GOD) aggregation even at very high GOD fabrication-solution concentrations, yet still supports GOD microstructures. In this manner, three-dimensional freeform GOD microstructures with different GOD concentrations were developed. Furthermore, the biocomparability of the GOD microstructure with the help of added biomaterials such as BSA was verified under living cell incubation. (C) 2016 Optical Society of America
Smart Beholder: An Extensible Smart Lens Platform
(2016)
Huang, Chun-Ying
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Fan, Ching-Ling
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Hsu, Chih-Fan
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Chang, Hsin-Yu
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Tsai, Tsung-Han
Smart Lenses refer to detachable, orientable and zoomable lenses that stream live videos over wireless networks to heterogeneous computing devices, including tablets and smartphones. Various novel applications are made possible by smart lenses, including mobile photography, smart surveillance cameras, and Unmanned Aerial Vehicle (UAV) cameras. However, to our best knowledge, existing smart lenses are closed and proprietary, and thus we initiate an open-source project called Smart Beholder for end-to-end solutions of smart lenses. The code and documents of Smart Beholder can be found at our website http://www.smartbeholder.org. Our Smart Beholder platform are useful to researchers for fast prototyping, developers for rapid development, and amateurs for hobbies. We have implemented Smart Beholder server (camera) using a popular embedded Linux platform, called Raspberry Pi. We have also realized Smart Beholder client (controller) on various OS\'s, including Android. Our experimental results show the practicality and efficiency of our proposed Smart Beholder: we outperform commercial products in the market in terms of both objective and subjective metrics. We believe the release of Smart Beholder will stimulate future studies on novel multimedia applications enabled by smart lenses.
Three-dimensional patterned graphene oxide-quantum dot microstructures via two-photon crosslinking
(2017-12-01)
Lin, Chun-Yu
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Chang, Hsin-Yu
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Yeh, Te-Fu
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Teng, Hsisheng
;
Chen, Shean-Jen
The two-photon crosslinking of graphene oxide-quantum dots (GOQDs) adopts rose Bengal as the photoactivator to induce the GOQD assembly process. Based on the Forster resonance energy transfer mechanism with oxygen as the crosslinking medium, three-dimensional patterned GOQD microstructures with near diffraction-limit spatial resolution have been fabricated and analyzed by a multiphoton excited fabrication instrument/microscope. (C) 2017 Optical Society of America