Article
Nanoscience & Nanotechnology
Michael J. Loes, Saman Bagheri, Nataliia S. Vorobeva, Jehad Abourahma, Alexander Sinitskii
Summary: This study proposes a highly tunable gas sensor strategy by combining MXene with a sacrificial material that can be controlled oxidized to form oxide nanoparticles, altering sensing response. The controlled annealing process retains the integrity of MXene sheets while converting the sacrificial material to a metal oxide, fine-tuning the sensor properties. The approach is demonstrated using Ti3C2Tx MXene mixed with TiS3, showing improved sensor response to ethanol. The addition of TiS3 allows for the preservation of MXene as the sensor material and the tuning of sensor properties through annealing for specific analytes or applications.
ACS APPLIED NANO MATERIALS
(2023)
Article
Polymer Science
Chunlian Liu, Peipei Huang, Wei Wang, Miao Tan, Fangbao Fu, Yunhui Feng
Summary: In this study, composite nanomaterials of TiO2 nanotube arrays (TiO2 NTAs) and polyaniline (PANI) were successfully prepared on titanium sheets using an anodic oxidation electrochemical method. The TiO2 NTA/PANI composite materials exhibited excellent UV photosensitivity and responsiveness, as well as good stability and reproducibility. The p-n heterostructure formed inside the composites hindered the recombination of photogenerated electron-hole pairs and improved their utilization of UV light. This work provides a theoretical basis for the application of metal oxides in UV photodetectors, which is important for the development of UV photodetectors.
Article
Chemistry, Analytical
Jing Fan, Lili Qiu, Wenxiang Zheng, Zihui Meng, Min Xue, Yu Qiao
Summary: A rapid self-assembly method was proposed to prepare a highly regular 3D face-centered cubic colloidal crystal array structure, with the study of factors such as microsphere diameter, concentration, and heating temperature. This method was then used to prepare a pNP imprinted photonic crystal sensor with high selectivity and sensitivity, showing reversible response and color changes within 3 minutes. This approach provides an efficient and repeatable way for large-area colloidal photonic crystal preparation, with practical applications.
MICROCHEMICAL JOURNAL
(2021)
Article
Chemistry, Physical
Jun Min Suh, Donghwi Cho, Sangmin Lee, Tae Hyung Lee, Jae-Wook Jung, Jinho Lee, Sung Hwan Cho, Tae Hoon Eom, Jung-Wuk Hong, Young-Seok Shim, Seokwoo Jeon, Ho Won Jang
Summary: This study focuses on highly porous and periodic 3D TiO2 nanostructures for indoor air quality monitoring. The nanostructures show unprecedented gas response and extremely fast response time, providing promising perspectives for the development of chemoresistive gas sensors in the Internet of Everything application.
Article
Multidisciplinary Sciences
Liangbo Xie, Pengfei Wang, Yi Li, Dongpeng Zhang, Denghui Shang, Wenwen Zheng, Yuguo Xia, Sihui Zhan, Wenping Hu
Summary: The authors propose a nitrogen doping strategy for selective electrocatalytic singlet oxygen production. By using this strategy, the selectivity and activity of O-1(2) production can be significantly improved.
NATURE COMMUNICATIONS
(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
Chemistry, Physical
Cheuk Kai Gary Kwok, Ying Wang, Xingyu Shu, Kin Man Yu
Summary: p-Type SnO can be oxidized into n-type SnO2, and we successfully fabricated an all-Tin Oxide transparent pn quasi-homojunction. Comparison with a p-SnO/n-ZnO heterojunction showed similar rectification behavior. XPS measurements revealed type II band offsets in both SnO2 and ZnO at the Gamma point, with respective valence band (conduction band) offsets of 2.8 eV (1.9 eV) and 2.4 eV (1.33 eV). The SnO/SnO2 p-n structure exhibited reasonable rectification with an ideality factor of -12.3, suggesting potential applications in transparent p-n junction devices.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Chemical
Changkun Ding, Xiwen Qin, Yingying Tian, Bowen Cheng
Summary: Novel polyethersulfone/graphene oxide@titanium dioxide photocatalytic membranes were developed via layer-by-layer self-assembly technique. The membranes exhibited improved photocatalytic activity and stability, high water flux, and degradation rate, making them ideal candidates for wastewater treatment.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Engineering, Electrical & Electronic
Lili Jiang, Qi Cui, Ruijia Zhang
Summary: The NiO/ZnSnO3 composite was synthesized using a hydrothermal method and its various properties were characterized. The composite exhibited a large specific surface area due to the tight adherence of bulk ZnSnO3 to the flake-like NiO. The composite showed excellent sensing properties towards n-butanol gas, with a high response and good stability.
IEEE SENSORS JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Zhoubin Boroun, Mohammad Ghorbani, Raheleh Mohammadpour, Ali Moosavi
Summary: Metal-oxide gas sensors, particularly the SnO2-CuO system, are widely used for detecting H2S gas. While the previous 2D thin bilayer model explained some aspects of the sensor's performance, experimental research showed that multicomponent heterostructures have higher response. By introducing an n-p-n junction in a 3D model, the sensitivity of the sensor element towards H2S gas significantly improved, indicating the potential for optimized sensor fabrication.
IEEE SENSORS JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Navpreet Kaur, Dario Zappa, Valentin-Adrian Maraloiu, Elisabetta Comini
Summary: Establishing a platform with different nanostructured oxides is a novel idea for developing highly sensitive and selective sensing devices. The study successfully created 3D-heterostructures consisting of 1D nanowires of NiO and WO3, exhibiting selective behavior towards different gases. The improved sensing performance of the heterostructures is attributed to charge carrier transport through specific interfaces and modulation of charge carriers in the electron depletion layer of WO3 and hole accumulation layer of NiO and NiWO4.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Seyed Naveed Hosseini, Xiaodan Chen, Patrick J. Baesjou, Arnout Imhof, Alfons van Blaaderen
Summary: The study successfully synthesized highly crystalline, organic-solvent-dispersible TiO2 nanorods through a modified nonhydrolytic sol-gel route, with some semi-spherical titania nanocrystals removed. The nanorods were predominantly anatase, while the semi-spherical crystals also contained the TiO2(B) phase.
APPLIED SCIENCES-BASEL
(2022)
Article
Chemistry, Multidisciplinary
Junghoon Choi, Benjamin Chacon, Hyunsoo Park, Kanit Hantanasirisakul, Taewoo Kim, Kateryna Shevchuk, Juyun Lee, Hohyung Kang, Soo-Yeon Cho, Jihan Kim, Yury Gogotsi, Seon Joon Kim, Hee-Tae Jung
Summary: The n-p-conductor three-phase transition of gas sensing behavior using Mo2CTx MXene is reported for the first time, with organic intercalants and film thickness playing a critical role. The presence of tetramethylammonium hydroxide (TMAOH) intercalant leads to p-type gas sensing response, while the absence of intercalant results in a clear n-type response. In addition, thicker Mo2CTx films exhibit conductor-type response compared to thinner films.
Article
Chemistry, Physical
Sikai Zhao, Yanbai Shen, Fulai Hao, Changke Kang, Baoyu Cui, Dezhou Wei, Fanli Meng
Summary: CuO-ZnO p-n junctions were constructed by precipitating CuO nanoparticles on the surface of ZnO nanowires, resulting in an enhancement of gas sensing performance, specifically in ethanol sensing. The distinct sensing behaviors of the sensors were discussed in relation to several factors and considerations.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Tatiana Shishkanova, Tomas Tobrman, Jaroslav Otta, Gabriela Broncova, Premysl Fitl, Martin Vrnata
Summary: This manuscript presents the preparation and characterization of polymer layers on platinum electrodes using cyclic voltammetry. The response of the prepared polymers as active/sensitive media in two types of sensors was evaluated, and it was found that the nature of the substituent attached to the thiophene ring significantly affects the properties of the polymer layer.
JOURNAL OF MATERIALS SCIENCE
(2022)
