13 papers · ranked by Valyu relevance
Chun-Ching Hsiao, Sheng-Yi Liu, An-Shen Siao, Vittorio M.N. Passaro
This article proposes a meliorated multi-frequency band pyroelectric sensor for detecting subjects with various velocities, namely extending the sensing frequency under good performance from electrical signals. A tactic, gradually increasing thickness of the ZnO layers, is used for redeeming drawbacks of a thicker…
Yanhao Guo, Shaobo Guo, Chunhua Yao, Zhiwei Pan + 2 more
In this article, hot-pressed PZT ceramics were used as a sensitive element material and made into a pyroelectric chip. Three current mode sensors were fabricated using a pyroelectric chip of different thicknesses (80 μm, 40 μm, and 30 μm). The voltage responsivity of sensors reached the order of magnitude of 105. The…
Chun-Ching Hsiao, Sheng-Yi Liu
A methodology is proposed for designing a multi-frequency band pyroelectric sensor which can detect subjects with various frequencies or velocities. A structure with dual pyroelectric layers, consisting of a thinner sputtered ZnO layer and a thicker aerosol ZnO layer, proved helpful in the development of the proposed…
Chia-Yu Tsai, Yan-Wen Lin, Hong-Ming Ku, Chia-Yen Lee + 1 more
'Mustafa Yavuz'] Infrared sensors incorporating suspended zinc oxide (ZnO) pyroelectric films and thermally insulated silicon substrates are fabricated using conventional MEMS-based thin-film deposition, photolithography, and etching techniques. The responsivity of the pyroelectric film is improved via annealing at 500…
Ugo Sassi, Romain Parret, Sébastien Nanot, Matteo Bruna + 7 more
'Stefano Borini' 'Domenico De Fazio' 'Zhuang Zhao' 'Elefterios Lidorikis' 'Frank H. L. Koppens' 'Andre Ferrari' 'A. Colli'] Graphene is ideally suited for photonic and optoelectronic applications, with a variety of photodetectors (PDs) in the visible, near-infrared (NIR), and THz reported to date, as well as thermal…
Thang Duy Dao, Satoshi Ishii, Anh Tung Doan, Yoshiki Wada + 3 more
'Akihiko Ohi' 'Toshihide Nabatame' 'Tadaaki Nagao'] 1 International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan. 2Department of Condensed Matter Physics, Graduate School of Science, Hokkaido University, Kita 10, Nisi 8…
Young‐Eun Shin, Yong‐Jin Park, Sujoy Kumar Ghosh, Youngoh Lee + 2 more
'Jonghwa Park' 'Hyunhyub Ko'] Title: Abstract Multifunctional electronic skins have attracted considerable attention for soft electronics including humanoid robots, wearable devices, and health monitoring systems. Simultaneous detection of multiple stimuli in a single self-powered device is desired to simplify…
Ryota Takahashi, Hikaru Misumi, Mikk Lippmaa
We have investigated the spontaneous polarization in Fe3O4 thin films by using dynamic and static pyroelectric measurements. The magnetic and dielectric behavior of Fe3O4 thin films grown on Nb:SrTiO3(001) substrates was consistent with bulk crystals. The well-known metal-insulator (Verwey) transition was observed at…
Eugene A. Eliseev, Nicholas V. Morozovsky, Mykola Ye. Yelisieiev, Anna N. Morozovska
'Anna N. Morozovska'] In the framework of the proposed model, the dependences of the pyroelectric response frequency spectra on the ferroelectric film thickness have been investigated. It was found that a pronounced extrinsic size effect is inherent to the pyroelectric response frequency spectra, such as the strong…
Valentin Fonck, Roop K. Mech, Mohammadali Razeghi, Stuart Finch + 7 more
Pyroelectric energy conversion offers a route for harvesting time-dependent thermalfluctuations that are abundant in natural and technological environments. Twodimensional ferroelectrics are particularly attractive for this purpose because reduced dimensionality enables ultrathin, mechanically compliant device…
Huize Wang, Charles Otieno Ogolla, Gyanendra Panchal, Marco Hepp + 9 more
Nitrogen-doped carbons (NC) are a class of sustainable materials for selective CO2 adsorption. We introduce a versatile concept to fabricate flexible NC-based sensor architectures for room-temperature sensing of CO2 in a one-step laser conversion of primary coatings cast from abundant precursors. By the unidirectional…
Authors not listed
Nitrogen dioxide (NO2) is a hazardous air pollutant with a lowered annual mean exposure limit from 40 to 10 µg/m3 (~5 parts-per-billion by volume, ppb) by the World Health Organization in 2021. This motivates the exploration of low-power and cost-efficient sensors that can detect such low concentrations of NO2, exhibit…
Authors not listed
This study presents a filterless mid-infrared (MIR) photodetector that integrates the wavelength-selective photo-thermal conversion properties of a Metal/Insulator/Metal (MIM) nanostructure metasurface with the high-sensitivity thermoelectric conversion of a thermopile (series-connected thermocouples). We overcame the…