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Article
Open AccessOrganic photodiodes with bias-switchable photomultiplication and photovoltaic modes
The limited sensitivity of photovoltaic-type photodiodes makes it indispensable to use pre-amplifier circuits for effectively extracting electrical signals, especially when detecting dim light. Additionally, t...
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Article
Open AccessHigh-performance piezoelectric composites via β phase programming
Polymer-ceramic piezoelectric composites, combining high piezoelectricity and mechanical flexibility, have attracted increasing interest in both academia and industry. However, their piezoelectric activity is ...
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Article
Facilely constructed two-sided microstructure interfaces between electrodes and cellulose paper active layer: eco-friendly, low-cost and high-performance piezoresistive sensor
The microstructure plays an important role in improving the sensing performance of pressure sensor. However, the design of microstructural active layer of pressure sensor usually involves complex process and e...
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Article
Wearable and washable textile-based strain sensors via a single-step, environment-friendly method
Recently, soft and stretchable strain sensors that can be incorporated into textiles have attracted significantly increasing interest for use in a diverse range of applications. However, the simple fabrication...
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Article
Adsorption behaviors of gas molecules on the surface of ZnO nanocrystals under UV irradiation
A UV-activated room temperature chemiresistive gas sensor based on ZnO nanocrystals film was fabricated. Its gas sensing properties under various conditions were also investigated in detail. The results shed n...
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Article
Improved response/recovery speeds of ZnO nanoparticle-based sensor toward NO2 gas under UV irradiation induced by surface oxygen vacancies
A fast and simple method using co-grinding with Fe powder followed by heat treatment is developed to regulate surface oxygen vacancy content of ZnO nanoparticles. The moderately increased surface oxygen vacanc...
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Article
Open AccessSelf-Polarization of PVDF Film Triggered by Hydrophilic Treatment for Pyroelectric Sensor with Ultra-Low Piezoelectric Noise
Polyvinylidene fluoride (PVDF) films possess multifunctional ability for piezo/pyro/ferroelectronic applications. One critical challenge of the traditional techniques is the complicated fabrication process for...
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Article
Optimization of temperature uniformity of a serpentine thin film heater by a two-dimensional approach
In this paper, a two-step method is proposed to optimize the layout of the conventional serpentine film heater thus to improve the temperature uniformity. The optimization is made on transverse direction first...
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Article
Flexible organic thin-film transistors based on poly(3-hexylthiophene) films for nitrogen dioxide detection
Flexible nitrogen dioxide (NO2) gas sensors based on organic thin-film transistors (OTFTs) were developed in this work, in which conductive indium tin oxide (ITO) coated polyethylene naphthalene-2,6-dicarboxylate...
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Article
Open AccessZnO Nanoparticles/Reduced Graphene Oxide Bilayer Thin Films for Improved NH3-Sensing Performances at Room Temperature
ZnO nanoparticles and graphene oxide (GO) thin film were deposited on gold interdigital electrodes (IDEs) in sequence via simple spraying process, which was further restored to ZnO/reduced graphene oxide (rGO)...
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Article
The investigation of reduced graphene oxide@ SnO2–polyaniline composite thin films for ammonia detection at room temperature
The reduced graphene oxide@ SnO2 (GS)–polyaniline (PANI) composite was synthesized through the in situ chemical oxide polymerization for ammonia (NH3) gas detection at room temperature. The structure and morpholo...
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Article
Gas sensors based on MWCNTs-PVP composite films for 1,2-dichloroethane vapor detection
Multi-walled carbon nanotubes (MWCNTs) - polyvinylpyrrolidone (PVP) composite materials were applied as sensitive films of resistive gas sensors for the first time to detect 1,2-dichloroethane vapor. Four sens...
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Article
Detection of 2,4-dinitrotoluene using hydrogen-bond acidic polymer coated SAW sensor
A strong hydrogen-bond acidic (HBA) polymer linear fluoroalcoholic polysiloxane (PLF), synthesized by one-step hydrosilylation, was introduced for 2,4-dinitrotoluene (2,4-DNT) detection using surface acoustic ...
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Article
Gas sensors for CO2 detection based on RGO–PEI films at room temperature
In this paper, polyethyleneimine (PEI) and reduced graphene oxide (RGO) were selected as sensing materials for carbon dioxide detection. Two kinds of sensors with different sensitive film structures, i.e., RGO...
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Article
The effect of MWCNTs on the performance of α-sexithiophene OTFT device and its gas-sensing property
In this paper, bottom contact organic thin-film transistor (OTFT) gas sensors were prepared. Silicon dioxide (SiO2) and titanium/aurum (Ti/Au) were used as the insulating layer and the electrode for the device, r...
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Article
Open AccessHigh-separation efficiency micro-fabricated multi-capillary gas chromatographic columns for simulants of the nerve agents and blister agents
To achieve both high speed and separation efficiency in the separation of a mixture of nerve and blister agent simulants, a high-aspect-ratio micro-fabricated multi-capillary column (MCC, a 50-cm-long, 450-μm-...
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Article
A carbon monoxide sensor based on single-walled carbon nanotubes doped with copper chloride
A carbon monoxide gas sensor based on single-walled carbon nanotube (SWCNT) has been developed for detection of carbon monoxide (CO) at room temperature. Copper chloride (CuCl) was mixed with SWNT by mechanica...
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Article
Terahertz Absorption Characteristics of NiCr Film and Enhanced Absorption by Reactive Ion Etching in a Microbolometer Focal Plane Array
Nano – scale metallic films have been proven to be an effective terahertz (THz) absorption layer in uncooled infrared (IR) microbolometers operated in THz spectral range. Optimized absorption can be achieved b...
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Article
The fabrication and optimization of OTFT formaldehyde sensors based on Poly(3-hexythiophene)/ZnO composite films
Formaldehyde (HCHO), a colorless and pungent-smelling gas, is confirmed be a huge threat to human health. The detection of formaldehyde is necessary and important. The Poly(3-hexythiophene) (P3HT)/ZnO organic-...
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Article
Preparation of bilayer/three-layer PEO-carbon nanotube composite thin films and their toluene-sensing application
The bilayer poly (ethylene oxide)/multiple-walled carbon nanotubes (PEO/MWCNTs) and three-layer PEO/MWCNTs/PEO composite thin films were fabricated with the spraying process on the interdigitated transducers (...
