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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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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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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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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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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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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