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Tran ATT, Hassan K, Tung TT, Tripathy A, Mondal A, Losic D. Graphene and metal-organic framework hybrids for high-performance sensors for lung cancer biomarker detection supported by machine learning augmentation. NANOSCALE 2024. [PMID: 38644676 DOI: 10.1039/d4nr00174e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/23/2024]
Abstract
Conventional diagnostic methods for lung cancer, based on breath analysis using gas chromatography and mass spectrometry, have limitations for fast screening due to their limited availability, operational complexity, and high cost. As potential replacement, among several low-cost and portable methods, chemoresistive sensors for the detection of volatile organic compounds (VOCs) that represent biomarkers of lung cancer were explored as promising solutions, which unfortunately still face challenges. To address the key problems of these sensors, such as low sensitivity, high response time, and poor selectivity, this study presents the design of new chemoresistive sensors based on hybridised porous zeolitic imidazolate (ZIF-8) based metal-organic frameworks (MOFs) and laser-scribed graphene (LSG) structures, inspired by the architecture of the human lung. The sensing performance of the fabricated ZIF-8@LSG hybrid sensors was characterised using four dominant VOC biomarkers, including acetone, ethanol, methanol, and formaldehyde, which are identified as metabolomic signatures in lung cancer patients' exhaled breath. The results using simulated breath samples showed that the sensors exhibited excellent performance for a set of these biomarkers, including fast response (2-3 seconds), a wide detection range (0.8 ppm to 50 ppm), a low detection limit (0.8 ppm), and high selectivity, all obtained at room temperature. Intelligent machine learning (ML) recognition using the multilayer perceptron (MLP)-based classification algorithm was further employed to enhance the capability of these sensors, achieving an exceptional accuracy (approximately 96.5%) for the four targeted VOCs over the tested range (0.8-10 ppm). The developed hybridised nanomaterials, combined with the ML methodology, showcase robust identification of lung cancer biomarkers in simulated breath samples containing multiple biomarkers and a promising solution for their further improvements toward practical applications.
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Affiliation(s)
- Anh Tuan Trong Tran
- School of Chemical Engineering, The University of Adelaide, Adelaide, South Australia, Australia.
| | - Kamrul Hassan
- School of Chemical Engineering, The University of Adelaide, Adelaide, South Australia, Australia.
| | - Tran Thanh Tung
- School of Chemical Engineering, The University of Adelaide, Adelaide, South Australia, Australia.
| | - Ashis Tripathy
- School of Electronics Engineering (SENSE), Vellore Institute of Technology, Vandalur-Kelambakkam Road, Chennai 600127, India
| | - Ashok Mondal
- School of Electronics Engineering (SENSE), Vellore Institute of Technology, Vandalur-Kelambakkam Road, Chennai 600127, India
| | - Dusan Losic
- School of Chemical Engineering, The University of Adelaide, Adelaide, South Australia, Australia.
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Chen SS, Chen XX, Yang TY, Chen L, Guo Z, Huang XJ. Temperature-modulated sensing characteristics of ultrafine Au nanoparticle-loaded porous ZnO nanobelts for identification and determination of BTEX. JOURNAL OF HAZARDOUS MATERIALS 2024; 463:132940. [PMID: 37951172 DOI: 10.1016/j.jhazmat.2023.132940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 11/03/2023] [Accepted: 11/04/2023] [Indexed: 11/13/2023]
Abstract
The identification and determination of benzene, toluene, ethylbenzene, and xylene (BTEX) has always been a formidable challenge for chemiresistive metal oxide sensors owing to their structural similarity and low reactivity, as well as the intrinsic cross sensitivity of metal oxides. In this paper, a temperature-modulated sensing strategy is proposed for the identification and determination of BTEX using a high-performance chemiresistive sensor. Ultrafine Au nanoparticle-loaded porous ZnO nanobelts as sensing materials were synthesized through an exchange reaction followed by thermal oxidation, which exhibited high response toward BTEX. Under dynamic modulation of working temperature, the distinguishable characteristic curves were demonstrated for each BTEX compound. By employing the linear discrimination and convolutional neural network analyses, highly effective BTEX identification was achieved among all investigated volatile organic compounds, which is difficult to realize for single chemiresistive sensors at constant working temperatures. Furthermore, quantitative analysis of BTEX concentrations was accomplished by establishing the relationship between concentration and response at specific points on their response curves. This developed strategy is expected to pave a new way for constructing highly sensitive gas sensors for the identification and analysis of hazardous gases, thereby enhancing their applicability in environmental monitoring.
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Affiliation(s)
- Shun-Shun Chen
- Information Materials and Intelligent Sensing Laboratory of Anhui Province, Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, PR China; Key Laboratory of Structure and Functional Regulation of Hybrid Materials (Anhui University), Ministry of Education, Hefei 230601, PR China
| | - Xu-Xiu Chen
- Information Materials and Intelligent Sensing Laboratory of Anhui Province, Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, PR China; Key Laboratory of Structure and Functional Regulation of Hybrid Materials (Anhui University), Ministry of Education, Hefei 230601, PR China
| | - Tian-Yu Yang
- Information Materials and Intelligent Sensing Laboratory of Anhui Province, Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, PR China; Key Laboratory of Structure and Functional Regulation of Hybrid Materials (Anhui University), Ministry of Education, Hefei 230601, PR China
| | - Li Chen
- Information Materials and Intelligent Sensing Laboratory of Anhui Province, Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, PR China; Key Laboratory of Structure and Functional Regulation of Hybrid Materials (Anhui University), Ministry of Education, Hefei 230601, PR China.
| | - Zheng Guo
- Information Materials and Intelligent Sensing Laboratory of Anhui Province, Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, PR China; Key Laboratory of Structure and Functional Regulation of Hybrid Materials (Anhui University), Ministry of Education, Hefei 230601, PR China.
| | - Xing-Jiu Huang
- Information Materials and Intelligent Sensing Laboratory of Anhui Province, Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, PR China; Key Laboratory of Environmental Optics and Technology, And Environmental Materials and Pollution Control Laboratory, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei, 230031, PR China
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Kumar P, Chandel M, Kataria S, Swami K, Kaur K, Sahu BK, Dadhich A, Urkude RR, Subaharan K, Koratkar N, Shanmugam V. Handheld Crop Pest Sensor Using Binary Catalyst-Loaded Nano-SnO 2 Particles for Oxidative Signal Amplification. ACS Sens 2024; 9:81-91. [PMID: 38113168 DOI: 10.1021/acssensors.3c01669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2023]
Abstract
In agriculture, pest management is a major challenge. Crop releases volatiles in response to the pest; hence, sensing these volatile signals at a very early stage will ease pest management. Here, binary catalyst-loaded SnO2 nanoparticles of <5 nm were synthesized for the repeated capture and oxidation of the signature volatile and its products to amplify the chemoresistive signal to detect concentrations as low as ≈120 ppb. The sensitivity may be due to the presence of the elements in the Sn-Fe-Pt bond evidenced by extended X-ray absorption fine-structure spectroscopy (EXAFS) that captures and oxidize the volatile without escaping. This strong catalyst may oxidize nontarget volatiles and can cause false signals; hence, a molecular sieve filter has been coupled to ensure high selectivity for the detection ofTuta absolutainfestation in tomato. Finally, with the support of a mobile power bank, the optimized sensor has been assembled into a lightweight handheld device.
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Affiliation(s)
- Prem Kumar
- Institute of Nano Science and Technology, Mohali 140306, India
| | - Mahima Chandel
- Institute of Nano Science and Technology, Mohali 140306, India
| | - Sarita Kataria
- Institute of Nano Science and Technology, Mohali 140306, India
| | - Kanchan Swami
- Institute of Nano Science and Technology, Mohali 140306, India
| | - Kamaljit Kaur
- Institute of Nano Science and Technology, Mohali 140306, India
| | | | - Ankita Dadhich
- Institute of Nano Science and Technology, Mohali 140306, India
| | - Rajashri R Urkude
- Accelerator Physics & Synchrotrons Utilization Division, Raja Ramanna Centre for Advanced Technology, Indore 452013, India
| | - Kesavan Subaharan
- ICAR - National Bureau of Agricultural Insect Resources, Bangalore 560064, India
| | - Nikhil Koratkar
- Materials Science Department, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
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