Article
Chemistry, Multidisciplinary
Tom Yager, George Chikvaidze, Qin Wang, Ying Fu
Summary: In this study, we combined graphene with asymmetric metal metasurfaces and optimized the geometry-dependent photoresponse for optoelectronic molecular sensor devices. By precise control and characterization, along with simulations, nanofabrication, and spectroscopy, we achieved control over mid-infrared peak response wavelengths, transmittance, and reflectance. Our methods enable simple, reproducible, and targeted mid-infrared molecular sensing over a wide range of geometrical parameters. With its potential for atomic thickness and diverse nanomaterial combinations, these technologies hold high impact potential for environmental monitoring, threat detection, and point of care diagnostics.
Article
Nanoscience & Nanotechnology
Nguyen The Hue, Qiang Wu, Weihua Liu, Xiangrui Bu, Haiyang Wu, Chang Wang, Xin Li, Xiaoli Wang
Summary: A novel hybrid film for ammonia detection based on a GO/graphene stack is proposed in this paper, showing excellent sensing characteristics through optimization of GO layer thickness. The GO layer serves as a molecular capture layer while graphene serves as a conductive layer, achieving significant improvement in the ammonia gas sensing performance.
Article
Engineering, Electrical & Electronic
Minh Huy Do, Ly Tan Nhiem
Summary: In this study, a sensor consisting of reduced graphene oxide (rGO) and polyaniline (PANI) was used to detect ammonia gas and strain. PANI was incorporated onto rGO planes by in situ polymerization, and thin films of hybrid material rGO/PANI prepared by the Langmuir-Schaefer technique were employed as sensing interfaces. The sensor showed a detection limit of 1 ppm for ammonia gas and strain at 0.1%. The effect of PANI content on the sensing performance was also investigated. The results are discussed in terms of the contribution of PANI to the electrical network of rGO and the sensing performance.
JOURNAL OF ELECTRONIC MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Ehsan Fallahnia, Seyedfakhreddin Nabavi
Summary: This article proposed a surface acoustic wave sensing system for detecting hydrogen gas, utilizing a graphene layer decorated with palladium nanoparticles to enhance sensitivity and selectivity. The study investigated the impact of graphene layers, palladium nanoparticle size, and spacing on the time response of the SAW detector, showing that smaller diameter palladium nanoparticles resulted in a time shift in detector response. By optimizing the sizes of graphene layers and palladium nanoparticles, the proposed SAW sensing system accurately detected hydrogen gas with a 3% concentration.
MICROSYSTEM TECHNOLOGIES-MICRO-AND NANOSYSTEMS-INFORMATION STORAGE AND PROCESSING SYSTEMS
(2021)
Article
Chemistry, Analytical
Xiaofeng Fan, Shuying Deng, Zhongchao Wei, Faqiang Wang, Chunhua Tan, Hongyun Meng
Summary: This sensor utilizes a unique structure coated with graphene oxide to measure the concentration of ammonia gas by changing the refractive index of the fiber cladding mode, showing high sensitivity and a linear fit coefficient in experiments. Furthermore, repetitive tests and humidity testing demonstrate the reusability and stability of the sensor.
Article
Chemistry, Analytical
Sebastian A. Schober, Yosra Bahri, Cecilia Carbonelli, Robert Wille
Summary: This study analyzed the robustness of different machine learning models for chemiresistive gas sensors based on a sensor simulation model. The impact of different sensor instabilities on the concentration prediction performance of the algorithms was investigated, and the explainability of the machine learning models was analyzed using a feature ranking method.
Article
Nanoscience & Nanotechnology
Jieun Son, Seulki Ji, Sungho Kim, Soyoung Kim, Seong K. Kim, Wooseok Song, Sun Sook Lee, Jongsun Lim, Ki-Seok An, Sung Myung
Summary: A highly facile method utilizing microcolumns integrated on a QCM gas-responsive system with enhanced chemical selectivity was reported for sensing and identifying volatile organic compound single gases. The addition of microcolumns on the QCM electrode increased the ability to accurately analyze frequency shifts upon sensing various single gas molecules. The system exhibited high detection response values above 50 ng/cm(2) for gases, with the microcolumn-equipped sensor showing improved gas identification ability based on distinct diverging behavior of time constants upon detection of different gases.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Engineering, Electrical & Electronic
Sebastian A. Schober, Cecilia Carbonelli, Alexandra Roth, Alexander Zoepfl, Caterina Travan, Robert Wille
Summary: This paper presents a simulation framework for generating typical sensor responses of a graphene-based gas sensor and investigates its drift behavior. The study shows promising results, and recalibration using different heating characteristics is necessary to ensure accuracy.
IEEE SENSORS JOURNAL
(2022)
Article
Nanoscience & Nanotechnology
Marija Prosheva, Maryam Ehsani, Bertha T. Perez-Martinez, Jadranka Blazevska Gilev, Yvonne Joseph, Radmila Tomovska
Summary: A novel dry method based on air sonication process was used to prepare graphene and multi-walled carbon nanotubes hybrids, avoiding the use of solvents and multistep purification process. By changing the ratio between MWCNTs and G, a range of hybrids with different surface morphologies and chemistries were obtained, showing great potential for designing mass-based sensors for toxic gases and chemiresistors for vapor detection.
Article
Chemistry, Analytical
Sung Bum Kang, Amit Sanger, Myeong Hoon Jeong, Jeong Min Baik, Kyoung Jin Choi
Summary: This study reports on the heterogeneous stacked interface of reduced graphene oxide (rGO) on the surface of ZnO nanowires and its performance as a NO2 gas sensor. Compared to traditional surface decoration using noble metals, the rGO-ZnO gas sensor shows excellent sensing performances including 22 times faster response behavior. The gas-sensing mechanism is elucidated for the first time by finite-difference time-domain (FDTD) simulation, confirming the role of rGO as a bridge between ZnO and NO2.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Analytical
Quanfu Li, Manli Sun, Chunsheng Jiang, Shuxiang Song, Tinghui Li, Minhua Xu, Wuliang Chen, Huiling Peng
Summary: This paper systematically investigates the ammonia (NH3)-sensing performance of phosphorus-doped graphene sensors. Stable phosphorus doping of graphene was achieved by using phosphorus pentoxide as the phosphorus source through chemical vapor deposition (CVD) at 480 oC. The results showed that phosphorus-doped graphene increased the NH3 response by 2.4 times on average, shortened the response (recovery) time by 70.6% (73.4%) on average, and had a theoretical limit of detection (LOD) of 68.76 ppb. The phosphorus-doped graphene sensor also exhibited excellent repeatability, stability, and ultra-high selectivity to NH3.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Crystallography
Monika Gupta, Huzein Fahmi Hawari, Pradeep Kumar, Zainal Arif Burhanudin
Summary: In this study, a hybrid of copper oxide with functionalized graphene was proposed for gas sensing at room temperature. The material exhibited high sensitivity, good electrical conductivity, and showed potential for use in domestic and industrial safety gas sensors.
Article
Materials Science, Ceramics
V. Munusami, K. Arutselvan, S. Vadivel, S. Govindasamy
Summary: In this study, a hybrid sensor based on molybdenum disulfide (MoS2)/graphene was designed and fabricated. The structural and performance properties of the sensor were systematically investigated. The results showed that the fabricated hybrid sensor exhibited superior LPG gas sensing performance, making it suitable for high-performance LPG sensors and home safety applications.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Multidisciplinary
Xu Dan, Li Ruiyi, Wang Qinsheng, Yang Yongqiang, Zhu Haiyan, Li Zaijun
Summary: This study presents the synthesis of a nickel-silver-graphene quantum dot-graphene hybrid with high oxidase-like activity and sensitive detection ability for malathion. In the presence of malathion, the hybrid exhibits multifunctional catalytic properties for colorimetric detection. The research results provide a promising platform for on-site pesticide detection.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Nanoscience & Nanotechnology
Anna Lipovka, Maxim Fatkullin, Sergey Shchadenko, Ilia Petrov, Anna Chernova, Evgenii Plotnikov, Vitaliy Menzelintsev, Shuang Li, Li Qiu, Chong Cheng, Raul D. Rodriguez, Evgeniya Sheremet
Summary: The concept of wearables is shifting towards textile electronics due to the close contact between textiles and skin, resulting in comfortable and compact sensors. Researchers have developed a simple method of laser intermixing of graphene with synthetic fabrics to create wearable sensing platforms. These hybrid materials exhibit high electrical conductivity and durability, and can be used without encapsulation. The versatility of these hybrid textiles is demonstrated through various applications, including recording muscle activity and implementing self-sterilization. This research offers valuable insights into textile-based electronics and opens up new possibilities for the Internet of Medical Things.
ACS APPLIED MATERIALS & INTERFACES
(2023)
