1
|
Deb M, Lu CJ, Zan HW. Achieving Room-Temperature ppb-Level H 2S Detection in a Au-SnO 2 Sensor with Low Voltage Enhancement Effect. ACS Sens 2024. [PMID: 38754006 DOI: 10.1021/acssensors.4c00105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/18/2024]
Abstract
Although semiconductor metal oxide-based sensors are promising for gas sensing, low-power and room temperature operation (24 ± 1 °C) remains desirable for practical applications particularly considering the request of energy saving or net zero emission. In this study, we demonstrate a Au/SnO2-based ultrasensitive H2S gas sensor with a limit of detection (LOD) of 2 ppb, operating at very low voltages (0.05 to 0.5 V) at room temperature. The Au/SnO2-based sensor showed approximately 7 times higher response (the ratio of change in the current to initial current) of ∼270% and 4 times faster recovery (126 s) compared to the pure SnO2-based sensor when exposed to 500 ppb H2S gas concentration at 0.5 V operating voltage at relative humidity (RH) 17.5 ± 2.5%. The enhancement can be attributed to the catalytic characteristics of AuNPs, increasing the number of adsorbed oxygen species on sensing material surfaces. Additionally, AuNPs aid in forming flower-petal-like Au/SnO2 nanostructures, offering a larger surface area and more active sites for H2S sensing. Moreover, at low voltage (<1 V), the localized dipoles at the Au/SnO2 interface may further enhance the absorption of polar oxygen molecules and hence promote the reaction between H2S and oxygen species. This low-power, ultrasensitive H2S sensor outperforms high-powered alternatives, making it ideal for environmental, food safety, and healthcare applications.
Collapse
Affiliation(s)
- Moumita Deb
- Department of Photonics, College of Electrical and Computer Engineering, National Yang Ming Chiao Tung University, 1001, Ta Hsueh Rd, Hsinchu 300, Taiwan
- Department of Photonics, College of Electrical and Computer Engineering, National Chiao Tung University, 1001, Ta Hsueh Rd, Hsinchu 300, Taiwan
| | - Chia-Jung Lu
- Department of Chemistry, National Taiwan Normal University, 162, Heping East Rd., Section 1, Taipei 11677, Taiwan
| | - Hsiao-Wen Zan
- Department of Photonics, College of Electrical and Computer Engineering, National Yang Ming Chiao Tung University, 1001, Ta Hsueh Rd, Hsinchu 300, Taiwan
- Department of Photonics, College of Electrical and Computer Engineering, National Chiao Tung University, 1001, Ta Hsueh Rd, Hsinchu 300, Taiwan
| |
Collapse
|
2
|
Li X, Guo J, Xu W, Cao J. Optimization of the Mixed Gas Detection Method Based on Neural Network Algorithm. ACS Sens 2023; 8:822-828. [PMID: 36701636 DOI: 10.1021/acssensors.2c02450] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Real-time mixed gas detection has attracted significant interest for being a key factor for applications of the electronic nose (E-nose). However, mixed gas detection still faces the challenge of long detection time and a large amount of training data. Therefore, in this work, we propose a feasible way to realize low-cost fast detection of mixed gases, which uses only the part response data of the adsorption process as the training set. Our results indicated that the proposed method significantly reduced the number of training sets and the prediction time of mixed gas. Moreover, it can achieve new concentration prediction of mixed gas using only the response data of the first 10 s, and the training set proportion can reduce to 60%. In addition, the convolutional neural network model can realize both the smaller training set but also the higher accuracy of mixed gas. Our findings provide an effective way to improve the detection efficiency and accuracy of E-noses for the experimental measurement.
Collapse
Affiliation(s)
- Xiulei Li
- Department of Physics & Hunan Institute of Advanced Sensing and Information Technology, Xiangtan University, Xiangtan411105, PR China
| | - Jiayi Guo
- Department of Physics & Hunan Institute of Advanced Sensing and Information Technology, Xiangtan University, Xiangtan411105, PR China
| | - Wangping Xu
- Department of Physics & Hunan Institute of Advanced Sensing and Information Technology, Xiangtan University, Xiangtan411105, PR China
| | - Juexian Cao
- Department of Physics & Hunan Institute of Advanced Sensing and Information Technology, Xiangtan University, Xiangtan411105, PR China
| |
Collapse
|
3
|
Huang ZH, Layek M, Li CF, Lee KM, Huang YC. Cesium Lead Bromide Nanocrystals: Synthesis, Modification, and Application to O 2 Sensing. SENSORS (BASEL, SWITZERLAND) 2022; 22:8853. [PMID: 36433450 PMCID: PMC9698211 DOI: 10.3390/s22228853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 11/08/2022] [Accepted: 11/14/2022] [Indexed: 06/16/2023]
Abstract
The fluorescence intensity of inorganic CsPbBr3 (CPB) perovskite nanocrystals (NCs) decreases in the presence of O2. In this study, we synthesized CPB NCs with various shapes and sizes for use as optical gas sensing materials. We fabricated O2 gas sensors from the various CPB NCs on several porous and nonporous substrates and examined the effects of the NC shapes and aggregate sizes and the substrate pore size on the device response. Our sensor fabricated from CPB nanocrystals on a porous substrate exhibited the highest response; the porous substrate allowed the rapid diffusion of O2 such that the NC surface was exposed effectively to the gas. Thus, the interfacial interaction between NC surfaces and substrates is a critical factor for consideration when preparing gas sensors with a high response.
Collapse
Affiliation(s)
- Zhi-Hao Huang
- Department of Chemical and Materials Engineering, Chang Gung University, Taoyuan City 33302, Taiwan
| | - Madhuja Layek
- Department of Materials Engineering, Ming Chi University of Technology, New Taipei City 24301, Taiwan
- School of Engineering, Brown University, Providence, RI 02912, USA
| | - Chia-Feng Li
- Department of Materials Engineering, Ming Chi University of Technology, New Taipei City 24301, Taiwan
| | - Kun-Mu Lee
- Department of Chemical and Materials Engineering, Chang Gung University, Taoyuan City 33302, Taiwan
- Department of Pediatrics, Division of Neonatology, Chang Gung Memorial Hospital, Taoyuan City 33305, Taiwan
| | - Yu-Ching Huang
- Department of Materials Engineering, Ming Chi University of Technology, New Taipei City 24301, Taiwan
| |
Collapse
|
4
|
Melnikov P, Bobrov A, Marfin Y. On the Use of Polymer-Based Composites for the Creation of Optical Sensors: A Review. Polymers (Basel) 2022; 14:polym14204448. [PMID: 36298026 PMCID: PMC9611646 DOI: 10.3390/polym14204448] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Revised: 10/08/2022] [Accepted: 10/17/2022] [Indexed: 11/16/2022] Open
Abstract
Polymers are widely used in many areas, but often their individual properties are not sufficient for use in certain applications. One of the solutions is the creation of polymer-based composites and nanocomposites. In such materials, in order to improve their properties, nanoscale particles (at least in one dimension) are dispersed in the polymer matrix. These properties include increased mechanical strength and durability, the ability to create a developed inner surface, adjustable thermal and electrical conductivity, and many others. The materials created can have a wide range of applications, such as biomimetic materials and technologies, smart materials, renewable energy sources, packaging, etc. This article reviews the usage of composites as a matrix for the optical sensors and biosensors. It highlights several methods that have been used to enhance performance and properties by optimizing the filler. It shows the main methods of combining indicator dyes with the material of the sensor matrix. Furthermore, the role of co-fillers or a hybrid filler in a polymer composite system is discussed, revealing the great potential and prospect of such matrixes in the field of fine properties tuning for advanced applications.
Collapse
Affiliation(s)
- Pavel Melnikov
- M. V. Lomonosov Institute of Fine Chemical Technologies, MIREA—Russian Technological University, 119571 Moscow, Russia
- Correspondence:
| | - Alexander Bobrov
- Department of Inorganic Chemistry, Ivanovo State University of Chemistry and Technology, Sheremetevsky pr., 10, 153010 Ivanovo, Russia
| | - Yuriy Marfin
- Department of Inorganic Chemistry, Ivanovo State University of Chemistry and Technology, Sheremetevsky pr., 10, 153010 Ivanovo, Russia
- Pacific National University, 136 Tikhookeanskaya Street, 680035 Khabarovsk, Russia
| |
Collapse
|
5
|
Liu CY, Sadhu AS, Karmakar R, Chu CS, Lin YN, Chang SH, Dalapati GK, Biring S. Strongly Improving the Sensitivity of Phosphorescence-Based Optical Oxygen Sensors by Exploiting Nano-Porous Substrates. BIOSENSORS 2022; 12:bios12100774. [PMID: 36290912 PMCID: PMC9599114 DOI: 10.3390/bios12100774] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Revised: 09/10/2022] [Accepted: 09/15/2022] [Indexed: 05/21/2023]
Abstract
Sensitivity is one of the crucial factors in determining the quality of a fluorescence/phosphorescence-based gas sensor, and is estimated from the measurement of responses (I0/I, where I0 and I refer to the measured optical intensity of a sensor in absence and presence of analyte molecules) at various concentrations of analytes. In this work, we demonstrate phosphorescence-based optical oxygen sensors fabricated on highly porous anodic aluminum oxide (AAO) membranes showing dramatically high response. These sensors exploit the enormous surface area of the AAO to facilitate the effective interaction between the sensing molecules and the analytes. We spin-coat an AAO membrane (200 nm pore diameter) with a platinum-based oxygen sensing porphyrin dye, platinum(II) meso-tetrakis (pentafluorophenyl) porphyrin (PtTFPP), to fabricate a sensor exhibiting I0/I ~400 at 100% oxygen atmosphere. To address the generality of the AAO membrane, we fabricate a separate sensor with another porphyrin dye, platinum octaethylporphyrin (PtOEP), which exhibits an even higher I0/I of ~500. Both of these sensors offer the highest responses as an optical oxygen sensor hitherto reported. SEM and EDS analysis are performed to realize the effect of the increased surface area of the AAO membrane on the enhanced sensitivity.
Collapse
Affiliation(s)
- Chih-Yi Liu
- Organic Electronics Research Center, Ming Chi University of Technology, New Taipei City 24301, Taiwan
| | - Annada Sankar Sadhu
- Organic Electronics Research Center, Ming Chi University of Technology, New Taipei City 24301, Taiwan
- Department of Electronic Engineering, Ming Chi University of Technology, New Taipei City 24301, Taiwan
| | - Riya Karmakar
- Organic Electronics Research Center, Ming Chi University of Technology, New Taipei City 24301, Taiwan
- Department of Electronic Engineering, Ming Chi University of Technology, New Taipei City 24301, Taiwan
| | - Cheng-Shane Chu
- Organic Electronics Research Center, Ming Chi University of Technology, New Taipei City 24301, Taiwan
- Department of Mechanical Engineering, Ming Chi University of Technology, New Taipei City 24301, Taiwan
| | - Yi-Nan Lin
- Department of Electronic Engineering, Ming Chi University of Technology, New Taipei City 24301, Taiwan
| | | | | | - Sajal Biring
- Organic Electronics Research Center, Ming Chi University of Technology, New Taipei City 24301, Taiwan
- Department of Electronic Engineering, Ming Chi University of Technology, New Taipei City 24301, Taiwan
- Correspondence:
| |
Collapse
|
6
|
Moss A, Jang Y, Arvidson J, Nesterov VN, D'Souza F, Wang H. Aromatic heterobicycle-fused porphyrins: impact on aromaticity and excited state electron transfer leading to long-lived charge separation. Chem Sci 2022; 13:9880-9890. [PMID: 36199634 PMCID: PMC9431455 DOI: 10.1039/d2sc03238d] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Accepted: 08/11/2022] [Indexed: 11/21/2022] Open
Abstract
A new synthetic method to fuse benzo[4,5]imidazo[2,1-a]isoindole to the porphyrin periphery at the β,β-positions has been developed, and its impact on the aromaticity and electronic structures is investigated. Reactivity investigation of the fused benzoimidazo-isoindole component reveals fluorescence quenching of a zinc porphyrin (AMIm-2) upon treatment with a Brønsted acid. The reaction of the zinc porphyrin (AMIm-2) with methyl iodide initiated a new organic transformation, resulting in the ring-opening of isoindole with the formation of an aldehyde and dimethylation of the benzoimidazo component. The fused benzoimidazo-isoindole component acted as a good ligand to bind platinum(ii), forming novel homobimetallic and heterobimetallic porphyrin complexes. The fusion of benzoimidazo-isoindole on the porphyrin ring resulted in bathochromically shifted absorptions and emissions, reflecting the extended conjugation of the porphyrin π-system. Time-resolved emission and transient absorption spectroscopy revealed stable excited state species of the benzoimidazo-isoindole fused porphyrins. Zinc porphyrin AMIm-2 promoted excited state electron transfer upon coordinating with an electron acceptor, C60, generating a long-lived charge-separated state, in the order of 37.4 μs. The formation of the exceptionally long-lived charge-separated state is attributed to the involvement of both singlet and triplet excited states of AMIm-2, which is rarely reported in porphyrins.
Collapse
Affiliation(s)
- Austen Moss
- Department of Chemistry, University of North Texas 1155 Union Circle, #305070 Denton TX 76203-5017 USA
| | - Youngwoo Jang
- Department of Chemistry, University of North Texas 1155 Union Circle, #305070 Denton TX 76203-5017 USA
| | - Jacob Arvidson
- Department of Chemistry, University of North Texas 1155 Union Circle, #305070 Denton TX 76203-5017 USA
| | - Vladimir N Nesterov
- Department of Chemistry, University of North Texas 1155 Union Circle, #305070 Denton TX 76203-5017 USA
| | - Francis D'Souza
- Department of Chemistry, University of North Texas 1155 Union Circle, #305070 Denton TX 76203-5017 USA
| | - Hong Wang
- Department of Chemistry, University of North Texas 1155 Union Circle, #305070 Denton TX 76203-5017 USA
| |
Collapse
|