Student Paper Award Announced!!

Session Index

Thin Film Technology and Optical Engineering

Oral session 4 - Sensor
Friday, Dec. 5, 2014  09:30-11:00
Chair: Hsin-Ying Lee,Ann-Kuo
Room: B21
09:30 - 09:45 Paper No.  2014-FRI-S1004-O001
Tsung-Han Yang Award Candidate High Sensitivity IGZO-TFT Protein Biosensors Modified with ZnO Nanorods
Tsung-Han Yang,Shu-Wen Chen,Tsung-Lin Yang,Jian-Jang Huang,

We demonstrate a biosensor consisting of an IGZO-TFT and a gold sensing pad. The ZnO nanorods are also applied to the sensing pad to improve the sensitivity because of its biocompatibility and high surface-to-volume ratio. The biosensor can selectively detect 36.2fM of EGFR in the total protein solution of 0.1ng/ml.

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09:45 - 10:00 Paper No.  2014-FRI-S1004-O004
Ming-Yen Chuang Award Candidate Gas Permeable Silver Nanowire Electrode for Realizing Vertical Type Sensitive Gas Sensor
Ming-Yen Chuang,Hsiao-Wen Zan,Peichen Yu,Yi-Chun Lai,Hsin-Fei Meng,

We successfully demonstrated a Poly (3-hexylthiophene) (P3HT) diode gas sensor with silver nanowires as a gas permeable top electrode. The silver nanowires dispersed in isopropyl alcohol (IPA) were used to form a top electrode by a simple drop-casting method. The meshes between nanowires enable gas molecules pass through the electrode and diffuse into the underlying organic sensing layer to dope or dedope the organic semiconductor. Here, the proposed sensor successfully detects ammonia down to 30 parts-per-billion (ppb), which is sensitive enough in many applications including breath ammonia monitoring as a point-of-care application.

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10:00 - 10:15 Paper No.  2014-FRI-S1004-O005
I-Chun Lai Award Candidate Single-shot Laser Treatment Provides Quasi–three-dimensional Paper-based Substrates for SERS with Attomolar Sensitivity
I-Chun Lai,Chen-Chieh Yu,Sin-Yi Chou,Yi-Chuan Tseng,Shao-Chin Tseng,Yu-Ting Yen,Hsuen-Li Chen,

Quasi-3D SERS paper with attomolar sensitivity is developed by laser-induced photothermal effect, and large numbers of plasmonic nanoparticles are prepared in the depth of focus of a Raman microscope, leading to a significant enhancement of SERS signals.

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10:15 - 10:30 Paper No.  2014-FRI-S1004-O008
Ming-Yen Chuang Vertical Nano-Junction Organic Diode as Sensitive Sensing Array
Ming-Yen Chuang,Jian-Nan Chen,Hsiao-Wen Zan,Chia-Jung Lu,

We demonstrate an extremely sensitive ammonia gas sensor based on vertical organic diode to exhibit a 3-ppb detection limit. Using phenyl-C61-butyric acid methyl ester (PCBM) as the sensing layer, the nanoporous electrode enlarges the surface to volume ratio and hence realizes the ppb-regime sensitivity. The proposed vertical nano-junction (VNJ) organic diode is then investigated by changing the semiconducting materials (i.e. sensing material). In addition to a pure n-type or p-type sensing material, the blend of n/p organic semiconductor (PCBM/P3HT) is used to react with gas. Changing the n/p blending ratio from 0% to 100% deliver a tunable gas response to ammonia and nitric oxide, hence demonstrating a sensing map concept with good selectivity.

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10:30 - 10:45 Paper No.  2014-FRI-S1004-O009
Tsu-Chi Chang Lasing Characteristics in a Single Crystalline ZnO Nano-membrane Fabricated by Focus Ion Beam
Tsu-Chi Chang,

We report the experimental observation of lasing action in a rectangular single crystalline ZnO nano-membrane fabricated by focus ion beam. The complicated lasing modes can be categorized as exciton lasing and photon lasing exhibited whispering-gallery mode (WGM) pattern and are controllable by changing the pumping position.

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10:45 - 11:00 Paper No.  2014-FRI-S1004-O012
Chun-Lin Kuo Solar Water Splitting by Facile Synthesis of p-type Zn-doped α-Fe2O3 Films
Yu-Kuei Hsu,Chun-Lin Kuo,

Transparent Zn-doped -Fe2O3 films were prepared by a deposition-annealing (DA) process using nontoxic iron(III) chloride as the Fe precursor and zinc chloride as a acceptor dopant. In terms of the structural examination of as-grown samples, X-ray diffraction analysis demonstrated an increase in the lattice parameters of Zn incorporated in Fe2O3 by substituting Fe in the host lattice. No second phase was determined, indicating no phase separation in the ternary materials. Furthermore, impedance measurements show that the Zn-dopant increases the acceptor concentration. Significantly, the photoelectrochemical measurements exhibited remarkable cathodic current.

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