Article
Materials Science, Multidisciplinary
Jinjuan Li, Jing Hu, Nan Li, Miao Cheng, Tao Wei, Qianqian Liu, Ruirui Wang, Wanfei Li, Yun Ling, Yafei Zhang, Bo Liu
Summary: This study successfully prepared Cu2O/CuO@rGO composites via a one-step green synthesis method at room temperature, and developed a gas sensor for NO2 detection at room temperature with ultra-high response and low detection limit.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Peng Wang, Shisong Guo, Zhixiang Hu, Licheng Zhou, Tiankun Li, Shiliang Pu, Hui Mao, Hong Cai, Zhenfeng Zhu, Bingbing Chen, Hua-Yao Li, Huan Liu
Summary: A Cu catalytic site synthesis method is developed using in situ-annealing approach on ultrathin WO2.72 nanowires, achieving high selectivity for detecting ultralow concentrations of toluene (R-a/R-g = 1.9 at 10 ppb). Cu single atoms act as active sites, promoting toluene oxidation and increasing the affinity of Cu single-atom catalysts-containing sensing materials. Density functional theory studies show selective binding of toluene to Cu single atoms, aiding the adsorption of toluene on WO2.72 nanowires. This study demonstrates successful atomic-level interface regulation engineering of WO2.72 nanowire-supported Cu single atoms, providing a potential strategy for highly active and durable CGSs development.
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
Nanoscience & Nanotechnology
Xingyu Yao, Jinbo Zhao, Zhidong Jin, Zhen Jiang, Dongmei Xu, Fenglong Wang, Xiaomei Zhang, Haixiang Song, Duo Pan, Yunxia Chen, Renbo Wei, Zhanhu Guo, Jiurong Liu, Nithesh Naik, Rutao Wang, Lili Wu
Summary: In this study, zinc hydroxyfluoride (ZnOHF) was used for efficient NO2 gas detection for the first time. The prepared ZnOHF exhibited high response, short response/recovery time, and excellent selectivity, outperforming ZnO raw material. ZnOHF showed promising practical application prospects with a wide detection window.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Sonia Freddi, Miriam C. Rodriguez Gonzalez, Pilar Carro, Luigi Sangaletti, Steven De Feyter
Summary: In this study, functionalized graphene gas sensors for ammonia detection were developed. The sensing capability of the covalently modified graphene layers was proven superior, and the sensor's response to ammonia was defect-driven, as revealed by theoretical calculations.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Materials Science, Multidisciplinary
Zhicheng Cai, Jiho Park, Sunghoon Park
Summary: In this study, porous In2O3-ZnO nanofibers were prepared via electrospinning method to fabricate a toluene gas sensor. The sensor could operate at room temperature with the illumination of ultraviolet light (365 nm). The structural properties of the sensor were characterized, and it was found that the nanofibers consisted of subnanograins with numerous pores, resulting in a large surface area for increased gas-sensor contact. The sensor showed excellent toluene-sensing properties with high selectivity.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Optics
Long Wen, Zhiwei Sun, Qilin Zheng, Xianghong Nan, Zaizhu Lou, Zhong Liu, David R. S. Cumming, Baojun Li, Qin Chen
Summary: This paper presents an on-chip plasmonic-catalytic hydrogen sensing concept based on a metal-insulator-semiconductor (MIS) nanojunction, which can achieve a concentration detection limit of 1 ppm at room temperature and zero bias. The sensing signal of the device is enhanced by three orders of magnitude compared to non-plasmonic devices, with a one-order of magnitude higher response speed. The excellent performance is attributed to the hydrogen induced interfacial dipole charge layer and the associated plasmonic hot electron modulated photoelectric response.
LIGHT-SCIENCE & APPLICATIONS
(2023)
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
Crystallography
Yanlin Zhang, Honglong Qu, Cheng Gang, Hongtao Guan, Chengjun Dong, Zongyou Yin
Summary: As a typical spinel ferrite, porous, tremella-like NiFe2O4 was fabricated using porous, ultrathin nanosheets via the coordination of Ni2+ and Fe2+ with 1,4-phenylenediboronic acid. The NiFe2O4 sensor exhibited a low detection limit of 50 ppb, a fast response/recovery time, good reproducibility, and long-term stability at 220°C, attributed to its good catalytic activity and the presence of porous ultrathin nanosheets. This work provides a new insight into the fabrication of NiFe2O4 using 1,4-phenylenediboronic acid and shows promising potential for ppb-level toluene detection.
Article
Chemistry, Inorganic & Nuclear
Ruozhen Wu, Juanyuan Hao, Tingting Wang, Shengliang Zheng, You Wang
Summary: The two-dimensional layered metal dichalcogenides (LMDs) SnS2 is a promising candidate for high-performance NO2 gas sensors, but typically inert for detecting ppb-level NO2 at room temperature. Carbon (C)-doping of SnS2 significantly enhances the sensitivity towards ppb-level NO2, with a response as high as 1200% ppm(-1) and a low limit of detection (LOD) down to 0.3 ppb provide a real solution for developing high-performance LMDs-based gas sensors.
INORGANIC CHEMISTRY FRONTIERS
(2021)
Article
Chemistry, Analytical
Zhen Yuan, Qiuni Zhao, Chunyan Xie, Junge Liang, Xiaohui Duan, Zaihua Duan, Shaorong Li, Yadong Jiang, Huiling Tai
Summary: In this study, gold-loaded tellurium nanobelts were synthesized through a hydrothermal process, and the resulting Au@Te sensor demonstrated rapid response, high sensitivity, good repeatability, and selectivity for the detection of NO2. The long-term stability of the sensor was also evaluated, with stable response observed over a period of 28 days.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Nanoscience & Nanotechnology
Ezgi Gulcay-Ozcan, Paul Iacomi, Guillaume Maurin, Sabine Devautour-Vinot
Summary: The pollution of indoor air, particularly the presence of toluene, is a major concern for human health. Metal-organic frameworks have the potential to detect and monitor this contaminant at low concentrations. A screening method was used to identify DUT-4 as a promising MOF for the selective adsorption of toluene from air. Experimental investigation confirmed the sensing performance of DUT-4, highlighting the applicability of this methodology for porous material screening in sensing applications.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Engineering, Electrical & Electronic
Min Zhou, Fa Guo, Fanpeng Duanmu, Zhurui Shen
Summary: This study reported CuO micro-polyhedrons with special exposed crystal facet, showing enhanced gas sensing performance. These CuO polyhedrons displayed good sensitivity towards typical alcohols, with the performance directly proportional to the exposure degree of the crystal facet.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Do Thi Thu, Zong-Han Liu, Ya-Chu Lee, Tzu-Wen Kuo, Wei-Lun Sung, Yen-Chang Chu, Yu-Lun Chueh, Weileun Fang
Summary: This study designs and implements a chip-scale amperometric ethanol sensor using the standard commercially available CMOS process and post-CMOS micromachining processes. The sensor consists of a suspended plate with a microhole structure as the working electrode, a fully anchored plate with a microhole structure as the counter electrode, and a microcavity as the electrolyte reservoir. By exploiting the metal and dielectric layers in the CMOS process, the sensor achieves enhanced sensitivity and response time. Measurements show that the sensor has a sensing range of ppm (20-1000 ppm) at room temperature, with a sensitivity of 0.01 nA/ppm and a response time of 6 s. The presented design demonstrates the potential of CMOS-MEMS for amperometric ethanol sensing.
IEEE SENSORS JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Ines C. Weber, Pascal Ruedi, Petr Sot, Andreas T. Guntner, Sotiris E. Pratsinis
Summary: This study introduces a compact, battery-powered device for detecting benzene concentration in gas mixtures, with high selectivity and sensitivity to various organic compounds. The device can accurately and rapidly detect benzene in indoor air, meeting the strictest legal limits while showing good agreement with mass spectrometry results.
Article
Nanoscience & Nanotechnology
Nan Ma, Shingo Ide, Koichi Suematsu, Ken Watanabe, Kengo Shimanoe
ACS APPLIED MATERIALS & INTERFACES
(2020)
Article
Chemistry, Multidisciplinary
Yongjiao Sun, Zhenting Zhao, Koichi Suematsu, Pengwei Li, Zhichao Yu, Wendong Zhang, Jie Hu, Kengo Shimanoe
Article
Chemistry, Analytical
Yongjiao Sun, Haoyue Yang, Zhenting Zhao, Koichi Suematsu, Pengwei Li, Zhichao Yu, Wendong Zhang, Jie Hu
SENSORS AND ACTUATORS B-CHEMICAL
(2020)
Article
Chemistry, Multidisciplinary
Koichi Suematsu, Yuki Hiroyama, Wataru Harano, Wataru Mizukami, Ken Watanabe, Kengo Shimanoe
Article
Chemistry, Multidisciplinary
Ryunosuke Okuda, Koichi Suematsu, Ken Watanabe, Kengo Shimanoe
Summary: A chitosan-derived nitrogen-doped carbon (NDC) with a well-designed pore structure is prepared using a novel activation process with ZnO and water vapor. The obtained NDC gas diffusion electrode for oxygen reduction exhibits higher performance than a Pt/carbon black electrode in the current density range of 1-500 mA/cm(2).
Article
Electrochemistry
Ryunosuke Okuda, Kota Nakano, Koichi Suematsu, Ken Watanabe, Anna Ilnicka, Jerzy P. Lukaszewicz, Kengo Shimanoe
Summary: The study fabricated nitrogen-doped carbons derived from chitosan and investigated the effect of activation temperature on their microstructure, showing the importance of controlling activation temperature on performance. Experimental results demonstrated that the microstructure of NDCs plays a key role in electrode performance.
Article
Chemistry, Multidisciplinary
Shingo Ide, Ken Watanabe, Koichi Suematsu, Isamu Yashima, Kengo Shimanoe
Article
Electrochemistry
Shingo Ide, Ken Watanabe, Koichi Suematsu, Yasuhiro Seto, Isamu Yashima, Kengo Shimanoe
Summary: This study demonstrates the potential of an oxide-ion-conductor-based oxygen pumping system as an on-site oxygen separation system, by observing the oxygen permeation capability in a Pt electrode/L-SDC/L-LSBO solid electrolyte cell. The results show a significant increase in oxygen permeation flux under applied DC voltages, with a remarkably high flux even at 500 degrees C. In situ X-ray diffraction studies reveal the changes in L-SDC under applied voltages, leading to the formation of a mixed electron- and oxide-ion-conducting L-SDC electrode and enhancing oxygen reduction reaction and incorporation.
Article
Materials Science, Multidisciplinary
Chengcheng Liu, Koichi Suematsu, Akihito Uchiyama, Ken Watanabe, Yanbao Guo, Deguo Wang, Kengo Shimanoe
Summary: Pd-loaded SnO2 nanoparticles prepared via a new loading method exhibited higher response to low concentrations of methane and better performance at lower operating temperatures. Additionally, the larger size of Pd particles was found to enhance the combustion activity of CH4 in humid conditions.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Yongjiao Sun, Zhenting Zhao, Koichi Suematsu, Pengwei Li, Wendong Zhang, Jie Hu
Summary: In this study, metal-organic frameworks (MOF) with different Zn and Ni ratios were synthesized without surfactant, leading to the formation of ZnO-NiO materials. Among them, ZNO-5 exhibited excellent acetone sensitivity and water-vapor resistance in high-humidity environments.
MATERIALS RESEARCH BULLETIN
(2022)
Article
Chemistry, Analytical
Yongjiao Sun, Zhenting Zhao, Rui Zhou, Pengwei Li, Wendong Zhang, Koichi Suematsu, Jie Hu
Summary: The study successfully prepared different sizes of cubic indium oxide nanocube clusters and their composites with Au nanoparticles using a solvothermal method, demonstrating that the Au@In2O3 system exhibits the best sensing properties. The Au nanoparticles enhance the receptor function of the semiconductor gas sensor, leading to increased sensing response.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Multidisciplinary
Hirotaka Koga, Kazuki Nagashima, Koichi Suematsu, Tsunaki Takahashi, Luting Zhu, Daiki Fukushima, Yintong Huang, Ryo Nakagawa, Jiangyang Liu, Kojiro Uetani, Masaya Nogi, Takeshi Yanagida, Yuta Nishina
Summary: Semiconducting nanomaterials with 3D network structures possess various attractive properties, but their structural design and electrical conductivity tunability are limited. To address this issue, a pyrolyzed cellulose nanofiber paper (CNP) semiconductor with a 3D network structure is proposed, which achieves nano-micro-macro trans-scale structural design and wide and systematic tunability of electrical conductivity.
Article
Chemistry, Analytical
Koichi Suematsu, Akihito Uchiyama, Ken Watanabe, Kengo Shimanoe
Summary: This study focused on developing a highly sensitive carbon monoxide sensor with wide humidity resistance by exploring the Pd loading method on SnO2 nanoparticles and the thickness of the sensing layer. The results indicated that the sensor prepared using the colloidal protection method for Pd loading showed better performance, and a thinner sensing layer design could improve sensor response and stability to humidity changes.
Article
Nanoscience & Nanotechnology
Yongjiao Sun, Baoxia Wang, Bingliang Wang, Zhenting Zhao, Wenlei Zhang, Wendong Zhang, Koichi Suematsu, Jie Hu
Summary: In this study, novel flower-like PtOx@ZnO/In2O3 hollow microspheres were prepared and systematically evaluated for their gas sensing performances. The ZnIn2 sensor presented a higher response, which was further enhanced by modifying it with PtOx nanoparticles. The Pt@ZnIn2 sensor exhibited outstanding isopropanol detection performance with high response values under different humidity levels.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Engineering, Electrical & Electronic
Koichi Suematsu, Wataru Harano, Shigeto Yamasaki, Ken Watanabe, Kengo Shimanoe
ACS APPLIED ELECTRONIC MATERIALS
(2020)
