Article
Chemistry, Analytical
Zhifu Feng, Damiano Giubertoni, Alessandro Cian, Matteo Valt, Mario Barozzi, Andrea Gaiardo, Vincenzo Guidi
Summary: In this study, a new method combining electron beam lithography (EBL) and focused ion beam (FIB) technologies is proposed to achieve low power consumption in MOS gas sensors. The miniaturization of the hotplate geometry is realized using this method, reducing power consumption effectively. The effectiveness and feasibility of this method are demonstrated through characterization and testing.
Article
Nanoscience & Nanotechnology
Nils Lamers, Zhaojun Zhang, Jesper Wallentin
Summary: Metal halide perovskites (MHPs) have been extensively studied as active materials for optoelectronic devices. This study presents a nonpolar solvent-based electron-beam-lithography process for the fabrication of MHP nanostructures. The method allows for the creation of sub-50 nm features and maintains the photoluminescence of CsPbBr3 nanowires. Additionally, metal contacts are successfully fabricated, demonstrating strong photoresponsivity. This approach provides an excellent tool for nanoscale MHP science and technology, enabling the fabrication of complex nanostructures.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Donghwi Cho, Jun Min Suh, Sang-Hyeon Nam, Seo Yun Park, Minsu Park, Tae Hyung Lee, Kyoung Soon Choi, Jinho Lee, Changui Ahn, Ho Won Jang, Young-Seok Shim, Seokwoo Jeon
Summary: Research explores a new class of UV-activated sensing nanoarchitecture made of highly periodic 3D TiO2, optimizing key parameters to achieve 55 times enhanced light absorption and significantly improve gas sensor performance.
Article
Nanoscience & Nanotechnology
Qi Jin, Wei Wen, Shilie Zheng, Rui Jiang, Jin-Ming Wu
Summary: Nanostructure modulation is effective for high performance TiO2-based gas sensors. By using a wet-chemistry route to precipitate directly branched TiO2 nanowire arrays on alumina tubes, the sensors exhibit enhanced response due to the unique porous architecture and quasi-aligned nanostructure. The phase junctions between the backbone and branch of the branched TiO2 nanowire arrays help resistance modulation, leading to excellent sensor properties.
Article
Automation & Control Systems
Hanyang Ji, Chunjin Mi, Zhenyu Yuan, Yang Liu, Hongmin Zhu, Fanli Meng
Summary: This study proposes a new method for detecting multicomponent gas based on the temperature-response relationship of the sensor. The method has low power consumption, low cost, and long-term monitoring, which can guide the future exploration of deployable sensors. The proof of concept shows accurate measurement of multicomponent gas with a mean error of 6.34% and 4.32%.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Chemistry, Multidisciplinary
Srinivasulu Kanaparthi, Shiv Govind Singh
Summary: A green lithography process was developed to create a MoS2 gas sensor array on paper, which can detect NH3 and H2S gases accurately and efficiently. The method avoids the use of toxic solvents and nonrenewable resources, and is scalable for mass production of gas sensors. This green and sustainable approach using solid-state deposition of MoS2 paves the way for future disposable gas sensing technology.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Chemistry, Analytical
Amanzhol Turlybekuly, Madina Sarsembina, Almagul Mentbayeva, Zhumabay Bakenov, Baktiyar Soltabayev
Summary: A highly sensitive N2O gas sensor operating at room temperature has been developed using CuO/TiO2 heterojunctioned nano-interfaces, demonstrating outstanding response and recovery times and an excellent detection limit at ultra-low concentrations.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Nanoscience & Nanotechnology
Hongying Lin, Junhe Wang, Shiqiang Xu, Qiang Zhang, Yongqiang Cheng, Dan Han, Hongtao Wang, Kai Zhuo
Summary: By functionalizing Au into WO3 nanofibers, the effect of different Au layer thicknesses on the sensor performance was studied. It was found that the 10 nm Au-WO3 composite nanomaterial sensor exhibited the most significant improvement, with optimal operating temperature at 175℃, excellent selectivity, and high sensitivity.
ACS APPLIED NANO MATERIALS
(2022)
Review
Chemistry, Multidisciplinary
Zirui Yan, Yaofang Zhang, Weimin Kang, Nanping Deng, Yingwen Pan, Wei Sun, Jian Ni, Xiaoying Kang
Summary: Gas sensors are vital in industry and daily life, and different types of sensors are developed for various situations. Titanium dioxide, with its outstanding properties and wide applications in fields such as dyes and photocatalysis, plays a significant role. Researchers are using modern computers to simulate and study sensors, opening up new possibilities for research. The combination of simulation and calculation helps to understand reaction mechanisms, improve gas sensor material design, and respond to different gas environments. This paper reviews the experimental and computational aspects of TiO2 and describes future research directions.
Article
Nanoscience & Nanotechnology
Mostafa Shooshtari, Sten Vollebregt, Yas Vaseghi, Mahshid Rajati, Saeideh Pahlavan
Summary: Detection of hazardous toxic gases for air pollution monitoring and medical diagnosis has been researched. In this paper, a Titanium dioxide (TiO2)-based gas sensor enhanced with gold nanoparticles was fabricated and characterized. The presence of gold nanoparticles on the surface of TiO2 was found to enhance the sensitivity response of gas sensors by up to about 40%. The fabricated gas sensor showed sensitivity to acetone, methanol, and ethanol vapors at room temperature and the recovery time of the gold decorated TiO2 sensor was less than 40 seconds.
Article
Chemistry, Multidisciplinary
Kyeorei Lim, Young-Moo Jo, Ji-Wook Yoon, Jun-Sik Kim, Dong-Jae Lee, Young Kook Moon, Ji Won Yoon, Jae-Hyeok Kim, Hun Ji Choi, Jong-Heun Lee
Summary: Transparent nanopatterned chemiresistors composed of aligned 1D Au-SnO2 nanofibers demonstrated highly selective detection of toxic NO2 gas at room temperature under visible light illumination. The sensors, with extremely low coverage of sensing materials and high transparency, can detect NO2 at sub-ppm levels with a detection limit as low as 6 ppb. The design, utilizing localized surface plasmonic resonance effect of Au nanoparticles, allows for room-temperature NO2 sensing without the need for external heaters or light sources, opening up new possibilities for transparent oxide-based gas sensors.
Article
Chemistry, Multidisciplinary
Hyeuk Jin Han, Gyu Rac Lee, Yujin Han, Hanhwi Jang, Eugene N. Cho, Sunho Kim, Chang Sub Kim, Soonmin Yim, Jae Won Jeong, Jong Min Kim, Seunghee Yu, Harry L. Tuller, Yeon Sik Jung
Summary: Controlled fabrication of three-dimensional metal oxide nanowire networks can greatly enhance signal stability and sensor response compared to random nanowire arrays. Systematic engineering and modeling of 3D geometries provide insights into the electrical conduction and gas-sensing response of 3D assemblies, revealing the critical importance of wire-to-wire junction points and their arrangement, to improve both performance and reliability of chemical sensors.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
Ruichen Liu, Chong Xing, Dongcheng Xie, Yujie Yang, Muhammad Mustafa, Lei Xu, Feng Wu
Summary: This article proposes a SnO2-based low-power quadrilateral gas sensor that achieves different responses through self-temperature modulation using a single-layer electrode. The sensor integrates four detection channels located on the four edges with a quadrilateral microheater. By designing the width of the microheater metal line on the four edges, temperature modulation is achieved to obtain different responses to gases. The sensor shows potential for gas identification and efficient differentiation of food species.
IEEE SENSORS JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Francesco Arcadio, Luigi Zeni, Aldo Minardo, Caterina Eramo, Stefania Di Ronza, Chiara Perri, Girolamo D'Agostino, Guido Chiaretti, Giovanni Porto, Nunzio Cennamo
Summary: In this study, a nanoplasmonic sensor chip based on a gold nanograting was tested using an experimental setup, and the orientation of the nanostripes forming the grating pattern was found to influence the biosensing performance, resulting in a best limit of detection of 23 pM for BSA detection. The longitudinal configuration showed two observable plasmonic phenomena sensitive to different BSA concentration ranges, ranging from pM to μM, which is important for various biochemical sensing applications requiring a wide working range.
Article
Engineering, Electrical & Electronic
Mostafa Shooshtari, Alireza Salehi, Sten Vollebregt
Summary: The study found that an increase in humidity can reduce the electrical conductivity of CNT gas sensors by around 4%, but for humidity above 80%, the conductivity slightly increases. Additionally, the response of the sensors to volatile organic compounds decreases by 40% with a change in humidity up to 80%.
IEEE SENSORS JOURNAL
(2021)
