1
|
Bariki R, Joseph RG, El-Kadri OM, Al-Sayah MH. The Development of Metal-Free Porous Organic Polymers for Sustainable Carbon Dioxide Photoreduction. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:1432. [PMID: 39269094 PMCID: PMC11397385 DOI: 10.3390/nano14171432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2024] [Revised: 08/27/2024] [Accepted: 08/29/2024] [Indexed: 09/15/2024]
Abstract
A viable tactic to effectively address the climate crisis is the production of renewable fuels via photocatalytic reactions using solar energy and available resources like carbon dioxide (CO2) and water. Organic polymer material-based photocatalytic materials are thought to be one way to convert solar energy into valuable chemicals and other solar fuels. The use of porous organic polymers (POPs) for CO2 fixation and capture and sequestration to produce beneficial compounds to reduce global warming is still receiving a lot of interest. Visible light-responsive organic photopolymers that are functionally designed and include a large number of heteroatoms and an extended π-conjugation allow for the generation of photogenerated charge carriers, improved absorption of visible light, increased charge separation, and decreased charge recombination during photocatalysis. Due to their rigid structure, high surface area, flexible pore size, permanent porosity, and adaptability of the backbone for the intended purpose, POPs have drawn more and more attention. These qualities have been shown to be highly advantageous for numerous sustainable applications. POPs may be broadly categorized as crystalline or amorphous according to how much long-range order they possess. In terms of performance, conducting POPs outperform inorganic semiconductors and typical organic dyes. They are light-harvesting materials with remarkable optical characteristics, photostability, cheap cost, and low cytotoxicity. Through cocatalyst loading and morphological tweaking, this review presents optimization options for POPs preparation techniques. We provide an analysis of the ways in which the preparative techniques will affect the materials' physicochemical characteristics and, consequently, their catalytic activity. An inventory of experimental methods is provided for characterizing POPs' optical, morphological, electrochemical, and catalytic characteristics. The focus of this review is to thoroughly investigate the photochemistry of these polymeric organic photocatalysts with an emphasis on understanding the processes of internal charge generation and transport within POPs. The review covers several types of amorphous POP materials, including those based on conjugated microporous polymers (CMPs), inherent microporosity polymers, hyper-crosslinked polymers, and porous aromatic frameworks. Additionally, common synthetic approaches for these materials are briefly discussed.
Collapse
Affiliation(s)
- Ranjit Bariki
- Materials Science and Engineering Program, College of Arts and Sciences, American University of Sharjah, Sharjah P.O. Box 26666, United Arab Emirates
| | - Reshma G Joseph
- Materials Science and Engineering Program, College of Arts and Sciences, American University of Sharjah, Sharjah P.O. Box 26666, United Arab Emirates
| | - Oussama M El-Kadri
- Materials Science and Engineering Program, College of Arts and Sciences, American University of Sharjah, Sharjah P.O. Box 26666, United Arab Emirates
- Department of Biology, Chemistry and Environmental Sciences, American University of Sharjah, Sharjah P.O. Box 26666, United Arab Emirates
- Materials Research Centre, College of Arts and Sciences, American University of Sharjah, Sharjah P.O. Box 26666, United Arab Emirates
| | - Mohammad H Al-Sayah
- Materials Science and Engineering Program, College of Arts and Sciences, American University of Sharjah, Sharjah P.O. Box 26666, United Arab Emirates
- Department of Biology, Chemistry and Environmental Sciences, American University of Sharjah, Sharjah P.O. Box 26666, United Arab Emirates
- Materials Research Centre, College of Arts and Sciences, American University of Sharjah, Sharjah P.O. Box 26666, United Arab Emirates
| |
Collapse
|
2
|
Liu Q, Huang Y, Wang S, Yang S, Jiang Z, Huang S. Monodispersed Au nanoparticles decorated MoS 2 nanosheets with enhanced peroxidase-like activity based electrochemical H 2O 2 sensing for anticancer drug evaluations. Anal Chim Acta 2024; 1320:342996. [PMID: 39142770 DOI: 10.1016/j.aca.2024.342996] [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] [Received: 06/25/2024] [Revised: 07/18/2024] [Accepted: 07/19/2024] [Indexed: 08/16/2024]
Abstract
BACKGROUND The unique size, physical and chemical properties, and ultra-high stability of nanozymes have attracted extensive attentions in sensing, but improvement of catalytic activity of the nanozymes is still an urgent issue. Given the ultra-high simulated enzyme activity of metal nanoparticles and the advantage of multi-enzyme catalysis, an Au-decorated MoS2 nanosheets (MoS2/Au NS) integrating the double peroxidase-like (POD) activity is developed. RESULTS By optimizing and adjusting the density of AuNPs, as well as its morphology and other parameters, a monodisperse and high-density distribution of AuNPs on MoS2 nanosheets was obtained, which can greatly improve the POD-like activity of MoS2/Au NS. Nafion solution was applied to assist the modification of MoS2/Au NS on the electrode surface so as to improved its stability. An electrochemical H2O2 detection platform was constructed by modifying MoS2/Au NS nanozyme on the SPCE using the conductive Nafion solution. And the negatively charged sulfonic acid group can eliminate negatively charged electroactive substances to improve the specificity. Then ascorbic acid was used to stimulate tumor cells to produce H2O2 as therapeutic model, an ultrasensitive chronocoulometry detection for H2O2 in cell lysate was established. The logarithmically of ΔQ and the logarithmically of H2O2 concentration showed a good linear relationship between 1 μM and 500 mM, with a LOD value of 0.3 μM. SIGNIFICANCE The developed H2O2 sensor has excellent stability, reproducibility (RSD = 2.3 %, n = 6) and selectivity, realized the quantitative detection of H2O2 in cell lysate. Compared with commercial fluorescence detection kits for H2O2 in cell lysate, it is worth mentioning that the electrochemical H2O2 sensor developed in this study is simpler and faster, with higher sensitivity and lower cost. This provides a potential substitute for disease diagnosis and treatment evaluation based on accurate detection of H2O2.
Collapse
Affiliation(s)
- Qiwen Liu
- NMPA Key Laboratory for Clinical Research and Evaluation of Drug for Thoracic Diseases, School of Pharmaceutical Sciences, Guangzhou Medical University, Guangzhou, 511436, China
| | - Yang Huang
- NMPA Key Laboratory for Clinical Research and Evaluation of Drug for Thoracic Diseases, School of Pharmaceutical Sciences, Guangzhou Medical University, Guangzhou, 511436, China
| | - Sheng Wang
- NMPA Key Laboratory for Clinical Research and Evaluation of Drug for Thoracic Diseases, School of Pharmaceutical Sciences, Guangzhou Medical University, Guangzhou, 511436, China
| | - Shuo Yang
- NMPA Key Laboratory for Clinical Research and Evaluation of Drug for Thoracic Diseases, School of Pharmaceutical Sciences, Guangzhou Medical University, Guangzhou, 511436, China
| | - Zhengjin Jiang
- Institute of Pharmaceutical Analysis, College of Pharmacy, Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Ministry of Education (MOE) of China, Jinan University, Guangzhou, 510632, China.
| | - Shengfeng Huang
- NMPA Key Laboratory for Clinical Research and Evaluation of Drug for Thoracic Diseases, School of Pharmaceutical Sciences, Guangzhou Medical University, Guangzhou, 511436, China.
| |
Collapse
|
3
|
Jiao C, Liang X, Wu X, Shang Y, Wu Y, Zhang F, Liu X, Zeng J, Yang C. SERS Platform for Integrated Enrichment, Isolation, and Identification of Multiple Respiratory Viruses in a Single Assay Using 3D Stereoscopic SERS Tags and Flocked Swabs. Anal Chem 2024. [PMID: 39092994 DOI: 10.1021/acs.analchem.4c01243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/04/2024]
Abstract
Influenza (flu) and severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) exhibit similar clinical symptoms, complicating the diagnosis and clinical management of these critical respiratory infections. Thus, there is an urgent need for rapid on-site detection technologies that can simultaneously detect SARS-CoV-2 and influenza A viruses. Here, we have developed the first platform that combines in situ sampling with immune swabs and multichannel surface-enhanced Raman spectroscopy (SERS) for simultaneous screening of these two respiratory viruses in a single assay. A seed-mediated growth method was used to assemble a number of silver spheres on the surface of Fe3O4@SiO2 spheres, which not only creates extensive Raman hotspots but also provides numerous sites for Raman signaling molecules, enhancing the sensing sensitivity. Integrating two specific Raman signaling molecules into the nanospheres allows for the parallel detection of both viruses, improving the efficiency of SERS signal read-out. Rapid quantitative screening of both SARS-CoV-2 and H1N1 is achievable within 15 min, with detection limits of 7.76, and 8.13 pg·mL-1 for their respective target proteins. The platform demonstrated excellent performance in testing and analyzing 98 clinical samples (SARS-CoV-2:50; influenza A:48), achieving sensitivities of 88.00, and 95.83% for SARS-CoV-2 and influenza A, respectively. Pearson's correlation analysis revealed a significant correlation with the clinical CT values (P < 0.0001), underscoring the great potential of this platform for the early, rapid, and simultaneous diagnostic discrimination of multiple pathogens.
Collapse
Affiliation(s)
- Chunpeng Jiao
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, P. R. China
| | - Xinyi Liang
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, P. R. China
| | - Xian Wu
- College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China
- Department of Clinical Laboratory, Peking University First Hospital, Beijing 100034, P. R. China
| | - Yanxue Shang
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, P. R. China
| | - Yanfang Wu
- School of Chemistry, The University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Fangdou Zhang
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, P. R. China
| | - Xiangyi Liu
- Department of Laboratory Medicine, Beijing Tongren Hospital, Capital Medical University, Beijing 100730, P. R. China
| | - Jingbin Zeng
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, P. R. China
| | - Chaoyong Yang
- College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China
| |
Collapse
|
4
|
Tudor M, Borlan R, Maniu D, Astilean S, de la Chapelle ML, Focsan M. Plasmon-enhanced photocatalysis: New horizons in carbon dioxide reduction technologies. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 932:172792. [PMID: 38688379 DOI: 10.1016/j.scitotenv.2024.172792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2024] [Revised: 04/23/2024] [Accepted: 04/24/2024] [Indexed: 05/02/2024]
Abstract
The urgent need for transition to renewable energy is underscored by a nearly 50 % increase in atmospheric carbon dioxide levels over the past century. The combustion of fossil fuels for energy production, transportation, and industrial activities are the main contributors to carbon dioxide emissions in the anthroposphere. Present approaches to reducing carbon emissions are proving inefficient, thereby accentuating the relevance of carbon dioxide photocatalysis in combating climate change - one of the critical issues of public concern. This process uses sunlight to convert carbon dioxide into valuable products, e.g., clean fuels, effectively reducing the carbon footprint and offering a sustainable use of carbon dioxide. In this context, plasmonic nanoparticles such as gold, silver, and copper play a pivotal role due to their proficiency in absorbing a wide range of light spectra, thereby effectively generating the necessary electrons and holes for the degradation of pollutants and surpassing the capabilities of traditional semiconductor catalysts. This review meticulously examines the latest advancements in plasmon-based carbon dioxide photocatalysis, scrutinizing the methodologies, characterizations, and experimental outcomes. The critical evaluation extends to exploring adjustments in the dimensional and morphological aspects of plasmonic nanoparticles, complemented by the incorporation of stabilizing agents, which may offer additional benefits. Furthermore, the review includes a thorough analysis of production rates and quantum yields based on different plasmonic materials and nanoparticle shapes and sizes, enriching the ongoing discourse on effective solutions in the field. Thus, our work emphasizes the pivotal role of plasmon-based photocatalysts in reducing carbon dioxide, investigating both the merits and challenges associated with integrating this emerging technology into climate change mitigation efforts.
Collapse
Affiliation(s)
- Madalina Tudor
- Biomolecular Physics Department, Faculty of Physics, Babes-Bolyai University, Mihail Kogalniceanu Street, 400084 Cluj-Napoca, Romania; Nanobiophotonics and Laser Microspectroscopy Centre, Interdisciplinary Research Institute on Bio-Nano-Sciences, Babeș-Bolyai University, Treboniu Laurian Street, 400271 Cluj-Napoca, Romania
| | - Raluca Borlan
- Nanobiophotonics and Laser Microspectroscopy Centre, Interdisciplinary Research Institute on Bio-Nano-Sciences, Babeș-Bolyai University, Treboniu Laurian Street, 400271 Cluj-Napoca, Romania
| | - Dana Maniu
- Biomolecular Physics Department, Faculty of Physics, Babes-Bolyai University, Mihail Kogalniceanu Street, 400084 Cluj-Napoca, Romania
| | - Simion Astilean
- Biomolecular Physics Department, Faculty of Physics, Babes-Bolyai University, Mihail Kogalniceanu Street, 400084 Cluj-Napoca, Romania; Nanobiophotonics and Laser Microspectroscopy Centre, Interdisciplinary Research Institute on Bio-Nano-Sciences, Babeș-Bolyai University, Treboniu Laurian Street, 400271 Cluj-Napoca, Romania
| | - Marc Lamy de la Chapelle
- Nanobiophotonics and Laser Microspectroscopy Centre, Interdisciplinary Research Institute on Bio-Nano-Sciences, Babeș-Bolyai University, Treboniu Laurian Street, 400271 Cluj-Napoca, Romania; IMMM - UMR 6283 CNRS, Le Mans Université, Olivier Messiaen Avenue, 72085 Le Mans, France.
| | - Monica Focsan
- Biomolecular Physics Department, Faculty of Physics, Babes-Bolyai University, Mihail Kogalniceanu Street, 400084 Cluj-Napoca, Romania; Nanobiophotonics and Laser Microspectroscopy Centre, Interdisciplinary Research Institute on Bio-Nano-Sciences, Babeș-Bolyai University, Treboniu Laurian Street, 400271 Cluj-Napoca, Romania.
| |
Collapse
|
5
|
Ye S, Zhang W, Zhai Z, Shang S, Huang L, Song Z, Jiang J. CO 2-Responsive Rosin-Based Supramolecular Hydrogels: Diverse Chiral Nanostructures and Their Application in In Situ Synthesis of Chiral Gold Nanoparticles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:647-656. [PMID: 38153972 DOI: 10.1021/acs.langmuir.3c02850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2023]
Abstract
Natural small molecules have demonstrated tremendous potential for the construction of supramolecular chiral nanostructures owing to their unique molecular structures and chirality. In this study, novel CO2-responsive supramolecular hydrogels were constructed using a series of rosin-based surfactants (CnMPAN, n = 10, 12, and 14). The macroscopic properties, rheological properties, nanostructures, and intermolecular interactions of the hydrogels were investigated using differential scanning calorimetry, rotational rheometry, cryogenic transmission electron microscopy, and Fourier transform infrared spectroscopy. Interestingly, diverse nanostructures containing helical nanofibers, interwoven nanofibers, and twisted nanoribbons were formed in the hydrogels, which were rarely observed in reported supramolecular hydrogels, and the strength of the hydrogels was significantly enhanced by increasing the CnMPAN concentration and the alkyl chain length. The obtained hydrogels exhibited excellent CO2-responsiveness, with no obvious variation in the nanostructures and rheological properties after response to CO2/N2 for five cycles. Taking advantage of the chiral nanostructures of hydrogels, gold nanoparticles (GNPs) were further prepared. The average particle sizes of the resulting GNPs were as low as 2.5 nm, and the GNPs also had a chiral structure. It is worth noting that no additional reductants and UV-light irradiation were used during the reduction process of GNPs. This study emphasizes that the unique molecular structure and chirality of rosin are critical for the preparation of hydrogels with chiral nanostructures. In addition, this study enriches the applications of forest resources.
Collapse
Affiliation(s)
- Shengfeng Ye
- Chinese Academy of Forestry, Key Laboratory of Biomass Energy and Material, National Forestry and Grassland Administration, National Engineering Laboratory for Biomass Chemical Utilization, Institute of Chemical Industry of Forestry Products, Nanjing, Jiangsu Province 210042, China
- College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China
- Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing, Jiangsu Province 210037, China
| | - Wenjing Zhang
- Chinese Academy of Forestry, Key Laboratory of Biomass Energy and Material, National Forestry and Grassland Administration, National Engineering Laboratory for Biomass Chemical Utilization, Institute of Chemical Industry of Forestry Products, Nanjing, Jiangsu Province 210042, China
| | - Zhaolan Zhai
- Chinese Academy of Forestry, Key Laboratory of Biomass Energy and Material, National Forestry and Grassland Administration, National Engineering Laboratory for Biomass Chemical Utilization, Institute of Chemical Industry of Forestry Products, Nanjing, Jiangsu Province 210042, China
| | - Shibin Shang
- Chinese Academy of Forestry, Key Laboratory of Biomass Energy and Material, National Forestry and Grassland Administration, National Engineering Laboratory for Biomass Chemical Utilization, Institute of Chemical Industry of Forestry Products, Nanjing, Jiangsu Province 210042, China
| | - Lixin Huang
- Chinese Academy of Forestry, Key Laboratory of Biomass Energy and Material, National Forestry and Grassland Administration, National Engineering Laboratory for Biomass Chemical Utilization, Institute of Chemical Industry of Forestry Products, Nanjing, Jiangsu Province 210042, China
| | - Zhanqian Song
- Chinese Academy of Forestry, Key Laboratory of Biomass Energy and Material, National Forestry and Grassland Administration, National Engineering Laboratory for Biomass Chemical Utilization, Institute of Chemical Industry of Forestry Products, Nanjing, Jiangsu Province 210042, China
| | - Jianxin Jiang
- College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China
| |
Collapse
|
6
|
Bai X, He L, Zhang W, Lv F, Zheng Y, Kong X, Wang D, Zhao Y. Bi 2MoO 6 Embedded in 3D Porous N,O-Doped Carbon Nanosheets for Photocatalytic CO 2 Reduction. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:nano13091569. [PMID: 37177113 PMCID: PMC10181000 DOI: 10.3390/nano13091569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Revised: 04/26/2023] [Accepted: 05/05/2023] [Indexed: 05/15/2023]
Abstract
Artificial photosynthesis is promising to convert solar energy and CO2 into valuable chemicals, and to alleviate the problems of the greenhouse effect and the climate change crisis. Here, we fabricated a novel photocatalyst by directly growing Bi2MoO6 nanosheets on three-dimensional (3D) N,O-doped carbon (NO-C). Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) show that the designed photocatalyst ensured the close contact between Bi2MoO6 and NO-C, and reduced the stacking of the NO-C layers to provide abundant channels for the diffusion of CO2, while NO-C can allow for fast electron transfer. The charge transfer in this composite was determined to follow a step-scheme mechanism, which not only facilitates the separation of charge carriers but also retains a strong redox capability. Benefiting from this unique 3D structure and the synergistic effect, BMO/NO-C showed excellent performance in photocatalytic CO2 reductions. The yields of the best BMO/NO-C catalysts for CH4 and CO were 9.14 and 14.49 μmol g-1 h-1, respectively. This work provides new insights into constructing step-scheme photocatalytic systems with the 3D nanostructures.
Collapse
Affiliation(s)
- Xue Bai
- The Institute of Technological Sciences, Wuhan University, Wuhan 430072, China
| | - Lang He
- The Institute of Technological Sciences, Wuhan University, Wuhan 430072, China
| | - Wenyuan Zhang
- School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150080, China
| | - Fei Lv
- The Institute of Technological Sciences, Wuhan University, Wuhan 430072, China
| | - Yayun Zheng
- The Institute of Technological Sciences, Wuhan University, Wuhan 430072, China
| | - Xirui Kong
- The Institute of Technological Sciences, Wuhan University, Wuhan 430072, China
| | - Du Wang
- The Institute of Technological Sciences, Wuhan University, Wuhan 430072, China
| | - Yan Zhao
- The Institute of Technological Sciences, Wuhan University, Wuhan 430072, China
| |
Collapse
|
7
|
Fang X, Lei S, Feng Z, Ou J. Conductive Polymers‐Confined Metal‐Organic Frameworks with Enhanced Activity for Highly Efficient Photocatalytic CO
2
Reduction. ChemElectroChem 2023. [DOI: 10.1002/celc.202201147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/03/2023]
Affiliation(s)
- Xinzuo Fang
- Jiangsu University of Technology Changzhou 213001 P. R. China
| | - Sheng Lei
- Jiangsu University of Technology Changzhou 213001 P. R. China
| | - Zhiwei Feng
- Jiangsu University of Technology Changzhou 213001 P. R. China
| | - Junfei Ou
- Jiangsu University of Technology Changzhou 213001 P. R. China
| |
Collapse
|
8
|
Skorjanc T, Mavrič A, Sørensen MN, Mali G, Wu C, Valant M. Cationic Covalent Organic Polymer Thin Film for Label-free Electrochemical Bacterial Cell Detection. ACS Sens 2022; 7:2743-2749. [PMID: 36053557 PMCID: PMC9513792 DOI: 10.1021/acssensors.2c01292] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Numerous species of bacteria pose a serious threat to human health and cause several million deaths annually. It is therefore essential to have quick, efficient, and easily operable methods of bacterial cell detection. Herein, we synthesize a novel cationic covalent organic polymer (COP) named CATN through the Menshutkin reaction and evaluate its potential as an impedance sensor for Escherichia coli cells. On account of its positive surface charge (ζ-potential = +21.0 mV) and pyridinium moieties, CATN is expected to interact favorably with bacteria that possess a negatively charged cell surface through electrostatic interactions. The interdigitated electrode arrays were coated with CATN using a simple yet non-traditional method of electrophoresis and then used in two-electrode electrochemical impedance spectroscopy (EIS) measurements. The impedance response showed a linear relationship with the increasing concentration of E. coli. The system was sensitive to bacterial concentrations as low as ∼30 CFU mL-1, which is far below the concentration considered to cause illnesses. The calculated limit of detection was as low as 2 CFU mL-1. This work is a rare example of a COP used in this type of bacteria sensing and is anticipated to stimulate further interest in the synthesis of organic polymers for EIS-based sensors.
Collapse
Affiliation(s)
- Tina Skorjanc
- Materials
Research Laboratory, University of Nova
Gorica, Vipavska 11c, 5270 Ajdovscina, Slovenia
| | - Andraž Mavrič
- Materials
Research Laboratory, University of Nova
Gorica, Vipavska 11c, 5270 Ajdovscina, Slovenia
| | - Mads Nybo Sørensen
- Department
of Physics, Chemistry and Pharmacy, University
of Southern Denmark, Campusvej 55, 5230 Odense, Denmark
| | - Gregor Mali
- NMR
Center, National Institute of Chemistry, Hajdrihova 19, 1000 Ljubljana, Slovenia
| | - Changzhu Wu
- Department
of Physics, Chemistry and Pharmacy, University
of Southern Denmark, Campusvej 55, 5230 Odense, Denmark,
| | - Matjaz Valant
- Materials
Research Laboratory, University of Nova
Gorica, Vipavska 11c, 5270 Ajdovscina, Slovenia,
| |
Collapse
|