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Chen P, Wu H, Zhao Y, Zhong L, Zhang Y, Zhan X, Xiao A, Huang Y, Zhang H, Guan BO. Quantitative Assessment of Fungal Biomarkers in Clinical Samples via an Interface-Modulated Optical Fiber Biosensor. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2312985. [PMID: 38373270 DOI: 10.1002/adma.202312985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Revised: 02/15/2024] [Indexed: 02/21/2024]
Abstract
Invasive fungal infections pose a significant public health threat. The lack of precise and timely diagnosis is a primary factor contributing to the significant increase in patient mortality rates. Here, an interface-modulated biosensor utilizing an optical fiber for quantitative analysis of fungal biomarkers at the early stage of point-of-care testing (POCT), is reported. By integrating surface refractive index (RI) modulation and plasmon enhancement, the sensor to achieve high sensitivity in a directional response to the target analytes, is successfully optimized. As a result, a compact fiber-optic sensor with rapid response time, cost-effectiveness, exceptional sensitivity, stability, and specificity, is developed. This sensor can successfully identify the biomarkers of specific pathogens from blood or other tissue specimens in animal models. It quantifies clinical blood samples with precision and effectively discriminates between negative and positive cases, thereby providing timely alerts to potential patients. It significantly reduces the detection time of fungal infection to only 30 min. Additionally, this approach exhibits remarkable stability and achieves a limit of detection (LOD) three orders of magnitude lower than existing methods. It overcomes the limitations of existing detection methods, including a high rate of misdiagnosis, prolonged detection time, elevated costs, and the requirement for stringent laboratory conditions.
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Affiliation(s)
- Pengwei Chen
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Institute of Photonics Technology, Jinan University, Guangzhou, 511443, China
- College of Physics & Optoelectronic Engineering, Jinan University, Guangzhou, 510632, China
| | - Haotian Wu
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Institute of Photonics Technology, Jinan University, Guangzhou, 511443, China
- College of Physics & Optoelectronic Engineering, Jinan University, Guangzhou, 510632, China
| | - Yajing Zhao
- Department of Dermatology, The First Affiliated Hospital of Jinan University, Guangzhou, 510632, China
- Institute of Mycology, Jinan University, Guangzhou, 510632, China
| | - Lv Zhong
- Department of Critical Care Medicine, The First Affiliated Hospital of Jinan University, Guangzhou, Guangdong, 510632, China
| | - Yujiao Zhang
- Department of Dermatology, The First Affiliated Hospital of Jinan University, Guangzhou, 510632, China
- Institute of Mycology, Jinan University, Guangzhou, 510632, China
| | - Xundi Zhan
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Institute of Photonics Technology, Jinan University, Guangzhou, 511443, China
- College of Physics & Optoelectronic Engineering, Jinan University, Guangzhou, 510632, China
| | - Aoxiang Xiao
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Institute of Photonics Technology, Jinan University, Guangzhou, 511443, China
- College of Physics & Optoelectronic Engineering, Jinan University, Guangzhou, 510632, China
| | - Yunyun Huang
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Institute of Photonics Technology, Jinan University, Guangzhou, 511443, China
- College of Physics & Optoelectronic Engineering, Jinan University, Guangzhou, 510632, China
| | - Hong Zhang
- Department of Dermatology, The First Affiliated Hospital of Jinan University, Guangzhou, 510632, China
- Institute of Mycology, Jinan University, Guangzhou, 510632, China
| | - Bai-Ou Guan
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Institute of Photonics Technology, Jinan University, Guangzhou, 511443, China
- College of Physics & Optoelectronic Engineering, Jinan University, Guangzhou, 510632, China
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Memon SF, Wang R, Strunz B, Chowdhry BS, Pembroke JT, Lewis E. A Review of Optical Fibre Ethanol Sensors: Current State and Future Prospects. SENSORS 2022; 22:s22030950. [PMID: 35161695 PMCID: PMC8840036 DOI: 10.3390/s22030950] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Revised: 01/14/2022] [Accepted: 01/21/2022] [Indexed: 12/04/2022]
Abstract
A range of optical fibre-based sensors for the measurement of ethanol, primarily in aqueous solution, have been developed and are reviewed here. The sensing approaches can be classified into four groups according to the measurement techniques used, namely absorption (or absorbance), external interferometric, internal fibre grating and plasmonic sensing. The sensors within these groupings can be compared in terms of their characteristic performance indicators, which include sensitivity, resolution and measurement range. Here, particular attention is paid to the potential application areas of these sensors as ethanol production is globally viewed as an important industrial activity. Potential industrial applications are highlighted in the context of the emergence of the internet of things (IoT), which is driving widespread utilization of these sensors in the commercially significant industrial and medical sectors. The review concludes with a summary of the current status and future prospects of optical fibre ethanol sensors for industrial use.
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Affiliation(s)
- Sanober Farheen Memon
- Optical Fibre Sensors Research Centre, University of Limerick, V94 T9PX Limerick, Ireland;
- Department of Electronic and Computer Engineering, University of Limerick, V94 T9PX Limerick, Ireland;
- Correspondence: (S.F.M.); (E.L.)
| | - Ruoning Wang
- Optical Fibre Sensors Research Centre, University of Limerick, V94 T9PX Limerick, Ireland;
- Key Laboratory of In-Fiber Integrated Optics of Ministry of Education, College of Physics and Optoelectronic Engineering, Harbin Engineering University, Harbin 150001, China
| | - Bob Strunz
- Department of Electronic and Computer Engineering, University of Limerick, V94 T9PX Limerick, Ireland;
| | - Bhawani Shankar Chowdhry
- NCRA-CMS Lab, IICT, Mehran University of Engineering and Technology, Jamshoro 76062, Sindh, Pakistan;
| | - J. Tony Pembroke
- Department of Chemical Sciences and Bernal Institute, University of Limerick, V94 T9PX Limerick, Ireland;
| | - Elfed Lewis
- Optical Fibre Sensors Research Centre, University of Limerick, V94 T9PX Limerick, Ireland;
- Department of Electronic and Computer Engineering, University of Limerick, V94 T9PX Limerick, Ireland;
- Correspondence: (S.F.M.); (E.L.)
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Koštejnová L, Ondráček J, Majerová P, Koštejn M, Kuncová G, Trögl J. Cultivation of Saccharomyces cerevisiae with Feedback Regulation of Glucose Concentration Controlled by Optical Fiber Glucose Sensor. SENSORS 2021; 21:s21020565. [PMID: 33466906 PMCID: PMC7830682 DOI: 10.3390/s21020565] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Revised: 01/08/2021] [Accepted: 01/11/2021] [Indexed: 11/16/2022]
Abstract
Glucose belongs among the most important substances in both physiology and industry. Current food and biotechnology praxis emphasizes its on-line continuous monitoring and regulation. These provoke increasing demand for systems, which enable fast detection and regulation of deviations from desired glucose concentration. We demonstrated control of glucose concentration by feedback regulation equipped with in situ optical fiber glucose sensor. The sensitive layer of the sensor comprises oxygen-dependent ruthenium complex and preimmobilized glucose oxidase both entrapped in organic–inorganic polymer ORMOCER®. The sensor was placed in the laboratory bioreactor (volume 5 L) to demonstrate both regulations: the control of low levels of glucose concentrations (0.4 and 0.1 mM) and maintenance of the glucose concentration (between 2 and 3.5 mM) during stationary phase of cultivation of Saccharomyces cerevisiae. Response times did not exceed 6 min (average 4 min) with average deviation of 4%. Due to these regulation characteristics together with durable and long-lasting (≥2 month) sensitive layer, this feedback regulation system might find applications in various biotechnological processes such as production of low glucose content beverages.
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Affiliation(s)
- Lucie Koštejnová
- Institute of Chemical Process Fundamentals of the CAS, v. v. i., Rozvojová 135/1, 16502 Prague, Czech Republic; (J.O.); (P.M.); (M.K.); (G.K.)
- Correspondence: ; Tel.: +420-220-390-303
| | - Jakub Ondráček
- Institute of Chemical Process Fundamentals of the CAS, v. v. i., Rozvojová 135/1, 16502 Prague, Czech Republic; (J.O.); (P.M.); (M.K.); (G.K.)
| | - Petra Majerová
- Institute of Chemical Process Fundamentals of the CAS, v. v. i., Rozvojová 135/1, 16502 Prague, Czech Republic; (J.O.); (P.M.); (M.K.); (G.K.)
| | - Martin Koštejn
- Institute of Chemical Process Fundamentals of the CAS, v. v. i., Rozvojová 135/1, 16502 Prague, Czech Republic; (J.O.); (P.M.); (M.K.); (G.K.)
| | - Gabriela Kuncová
- Institute of Chemical Process Fundamentals of the CAS, v. v. i., Rozvojová 135/1, 16502 Prague, Czech Republic; (J.O.); (P.M.); (M.K.); (G.K.)
- Faculty of Environment, Jan Evangelista Purkyně University in Ústí nad Labem, Pasteurova 3632/15, 40096 Ústí nad Labem, Czech Republic;
| | - Josef Trögl
- Faculty of Environment, Jan Evangelista Purkyně University in Ústí nad Labem, Pasteurova 3632/15, 40096 Ústí nad Labem, Czech Republic;
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Ning Y, Hu J, Lu F. Aptamers used for biosensors and targeted therapy. Biomed Pharmacother 2020; 132:110902. [PMID: 33096353 PMCID: PMC7574901 DOI: 10.1016/j.biopha.2020.110902] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 10/12/2020] [Accepted: 10/14/2020] [Indexed: 01/07/2023] Open
Abstract
Aptamers are single-stranded nucleic acid sequences that can bind to target molecules with high selectivity and affinity. Most aptamers are screened in vitro by a combinatorial biology technique called systematic evolution of ligands by exponential enrichment (SELEX). Since aptamers were discovered in the 1990s, they have attracted considerable attention and have been widely used in many fields owing to their unique advantages. In this review, we present an overview of the advancements made in aptamers used for biosensors and targeted therapy. For the former, we will discuss multiple aptamer-based biosensors with different principles detected by various signaling methods. For the latter, we will focus on aptamer-based targeted therapy using aptamers as both biotechnological tools for targeted drug delivery and as targeted therapeutic agents. Finally, challenges and new perspectives associated with these two regions were further discussed. We hope that this review will help researchers interested in aptamer-related biosensing and targeted therapy research.
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Affiliation(s)
- Yi Ning
- Department of Microbiology, The Medicine School of Hunan University of Chinese Medicine, Changsha, Hunan, 410208, PR China
| | - Jue Hu
- Department of Microbiology, The Medicine School of Hunan University of Chinese Medicine, Changsha, Hunan, 410208, PR China
| | - Fangguo Lu
- Department of Microbiology, The Medicine School of Hunan University of Chinese Medicine, Changsha, Hunan, 410208, PR China.
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A Review of Methane Gas Detection Sensors: Recent Developments and Future Perspectives. INVENTIONS 2020. [DOI: 10.3390/inventions5030028] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Methane, the primary component of natural gas, is a significant contributor to global warming and climate change. It is a harmful greenhouse gas with an impact 28 times greater than carbon dioxide over a 100-year period. Preventing methane leakage from transmission pipelines and other oil and gas production activities is a possible solution to reduce methane emissions. In order to detect and resolve methane leaks, reliable and cost-effective sensors need to be researched and developed. This paper provides a comprehensive review of different types of methane detection sensors, including optical sensors, calorimetric sensors, pyroelectric sensors, semiconducting oxide sensors, and electrochemical sensors. The discussed material includes the definitions, mechanisms and recent developments of these sensors. A comparison between different methods, highlighting the advantages and disadvantages of each, is also presented to help address future research needs.
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Hu Y, Muhammad T, Wu B, Wei A, Yang X, Chen L. A simple on-line detection system based on fiber-optic sensing for the realtime monitoring of fixed bed adsorption processes of molecularly imprinted polymers. J Chromatogr A 2020; 1622:461112. [PMID: 32386708 DOI: 10.1016/j.chroma.2020.461112] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2019] [Revised: 04/01/2020] [Accepted: 04/03/2020] [Indexed: 02/07/2023]
Abstract
Fixed bed adsorption is widely used for separations and purifications of active components in medicine, and for wastewater treatment. At present, fixed bed adsorption breakthrough curve is generally obtained by manual sampling and off-line detection. In this study, we proposed a method for on-line monitoring of fixed bed adsorption process using a self-assembled fiber-optic sensing (FOS) system. The adsorption of 2,4-dichlorophenoxyacetic acid (2,4-D) on the fixed bed packed with molecularly imprinted polymers (MIPs) and non-imprinted polymers (NIPs) were studied. The reproducibility and precision of the system was investigated. The relative standard deviation (RSD) of the system was less than 1.54%, which indicates that the system has a good reproducibility. The effects of initial concentration, flow rate, adsorbent mass and particle size on the breakthrough curves were investigated. Through screening, it was found that adsorption kinetics of the polymer materials fit to Thomas and Yoon-Nelson models. The MIPs showed high binding capacity, good selectivity, fast adsorption rate, indicating a great potential for the treatment of 2,4-D contaminated water. Moreover, this study has identified that the detection method has the advantages of being on-line, realtime, simple, and accurate. The on-line method can facilitate the study of fixed bed adsorption processes and accelerate the understanding of adsorption kinetics.
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Affiliation(s)
- Yiting Hu
- College of Chemistry & Chemical Engineering, Xinjiang University, Xinjiang Key laboratory of Oil and Gas Fine Chemicals, Urumqi 830046, PR China
| | - Turghun Muhammad
- College of Chemistry & Chemical Engineering, Xinjiang University, Xinjiang Key laboratory of Oil and Gas Fine Chemicals, Urumqi 830046, PR China.
| | - Beibei Wu
- College of Chemistry & Chemical Engineering, Xinjiang University, Xinjiang Key laboratory of Oil and Gas Fine Chemicals, Urumqi 830046, PR China
| | - Aixia Wei
- College of Chemistry & Chemical Engineering, Xinjiang University, Xinjiang Key laboratory of Oil and Gas Fine Chemicals, Urumqi 830046, PR China
| | - Xiaoxia Yang
- College of Chemistry & Chemical Engineering, Xinjiang University, Xinjiang Key laboratory of Oil and Gas Fine Chemicals, Urumqi 830046, PR China
| | - Lingxin Chen
- CAS Key Laboratory of Coastal Environment Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, PR China; School of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, PR China
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7
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Dissolved Carbon Dioxide Sensing Platform for Freshwater and Saline Water Applications: Characterization and Validation in Aquaculture Environments. SENSORS 2019; 19:s19245513. [PMID: 31847169 PMCID: PMC6960747 DOI: 10.3390/s19245513] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 11/28/2019] [Accepted: 12/10/2019] [Indexed: 11/21/2022]
Abstract
A sensing configuration for the real-time monitoring, detection, and quantification of dissolved carbon dioxide (dCO2) was developed for aquaculture and other applications in freshwater and saline water. A chemical sensing membrane, based on a colorimetric indicator, is combined with multimode optical fiber and a dual wavelength light-emitting diode (LED) to measure the dCO2-induced absorbance changes in a self-referenced ratiometric scheme. The detection and processing were achieved with an embeded solution having a mini spectrometer and microcontroller. For optrode calibration, chemical standard solutions using sodium carbonate in acid media were used. Preliminary results in a laboratory environment showed sensitivity for small added amounts of CO2 (0.25 mg·L−1). Accuracy and response time were not affected by the type of solution, while precision was affected by salinity. Calibration in freshwater showed a limit of detection (LOD) and a limit of quantification (LOQ) of 1.23 and 1.87 mg·L−1, respectively. Results in saline water (2.5%) showed a LOD and LOQ of 1.05 and 1.16 mg·L−1, respectively. Generally, performance was improved when moving from fresh to saline water. Studies on the dynamics of dissolved CO2 in a recirculating shallow raceway system (SRS+RAS) prototype showed higher precision than the tested commercial sensor. The new sensor is a compact and robust device, and unlike other sensors used in aquaculture, stirring is not required for correct and fast detection. Tests performed showed that this new sensor has a fast accurate detection as well as a strong potential for assessing dCO2 dynamics in aquaculture applications.
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Extracellular Oxygen Sensors Based on PtTFPP and Four-Arm Block Copolymers. APPLIED SCIENCES-BASEL 2019. [DOI: 10.3390/app9204404] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Three four-arm amphiphilic block copolymers with different chain lengths, consisting of a hydrophilic chain of polyethylene glycol (PEG) and hydrophobic segment of polycaprolactam (PCL), were synthesized and used to encapsulate the high-efficient and hydrophobic oxygen probe of platinum(II)-5,10,15,20-tetrakis-(2,3,4,5,6-pentafluorophenyl)-porphyrin (PtTFPP) to form polymer micelles. This approach enabled the use of PtTFPP in aqueous solution for biosensing. Experimental results demonstrated that the particle sizes of these nano-oxygen sensors between 40.0 and 203.8 nm depend on the structures of block copolymers. PtTFPP in these micelles showed an effective quantum yield under nitrogen environment, ranging from 0.06 to 0.159. The new sensors are suitable for analyzing dissolved oxygen concentrations in the range of 0.04–39.3 mg/L by using the linear Stern–Volmer equation at room temperature. In addition, it has been shown that these sensors are capable of in situ monitoring the dissolved oxygens in the culture medium of E. coli and Romas cells during the respiration process, and distinguishing the drug activity of antibiotic ampicillin from that of antimycin A. This study showed that the use of these nanostructured multi-arm block copolymer micelles can achieve efficient biological applications without specific structural modification of the hydrophobic PtTFPP probe, which is expected to have broad prospects.
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PAS1-modified optical SIS sensor for highly sensitive and specific detection of toluene. Biosens Bioelectron 2019; 141:111469. [PMID: 31260905 DOI: 10.1016/j.bios.2019.111469] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Revised: 06/18/2019] [Accepted: 06/22/2019] [Indexed: 11/23/2022]
Abstract
We report on a novel solution immersed silicon (SIS) sensor modified with bio-receptor to detect toluene. To perform this approach, bio-receptor PAS1 which specifically interacts with toluene was chosen as a capture agent for SIS ellipsometric sensing. We constructed wild PAS1 and mutant PAS1 (F46A and F79Y) which are toluene binding-defective. Especially, we utilized an easily accessible capturing approach based on silica binding peptide (SBP) for direct immobilization of PAS1 on the SiO2 surfaces. After the immobilization of SBP-tagged PAS1 to the sensing layers, PAS1-based SIS sensor was evaluated for its ability to recognize toluene. As a result, a significant up-shift in Psi (Ψ) was clearly observed with a low limit of detection (LOD) of 0.1 μM, when treated with toluene on wild PAS1-surface, but not on mutant PAS1-sensing layers, indicating the selective interactions between PAS1 and toluene molecule. The PAS1-SIS sensor showed no changes in Psi (Ψ), if any, negligible, when exposed to benzene, phenol, xylene and 4-nitrophenol as negative controls, thereby demonstrating the specificity of interaction between PAS1 and toluene. Taken together, our results strongly indicate that PAS1-modified ellipsometry sensor can provide a high fidelity system for the accurate and selective detection of toluene.
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Frankær CG, Sørensen TJ. A unified approach for investigating chemosensor properties - dynamic characteristics. Analyst 2019; 144:2208-2225. [PMID: 30839988 DOI: 10.1039/c9an00268e] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Chemosensors are a group of sensors-responsive sensor chemistry, sensor hardware, and software-that report on the composition of solutions and gaseous samples. Dynamic properties are fundamental for all sensor characterization. While electrochemical chemosensors have seen a century of research and are well-described, research on chemosensors using other modes of transductions are still at an early stage. The dynamic properties of chemosensors-independent of their mode of transduction-are not reported consistently in the literature. This makes it impossible to compare sensor performance of chemosensors from different manufacturers and laboratories. To remedy this, standardized experimental methods that exclude the influence of drift and any dependence on activity step change must be used. Subsequently, the resulting data must be treated using a unifying analysis formalism, and robust values must be used to describe chemosensor characteristics. Characterizing the sensor properties in turn enables rationalizing the link between sensor performance and sensor chemistry. Following a review of sensor theory, a thorough discussion of experimental methods and data analysis models for determining dynamic sensor properties, we arrive at evidence-based recommendations for good practice when describing new chemosensors. Adhering to these recommendations, sensor performance can be compared between laboratories, and information on the sensor chemistry may be revealed in the data analysis. This topic is particularly relevant in the rapidly maturing field of optical chemosensors.
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Affiliation(s)
- Christian G Frankær
- Nano-Science Center & Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 København Ø, Denmark.
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Pawar D, Kale SN. A review on nanomaterial-modified optical fiber sensors for gases, vapors and ions. Mikrochim Acta 2019; 186:253. [DOI: 10.1007/s00604-019-3351-7] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Accepted: 02/28/2019] [Indexed: 12/23/2022]
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Frankær CG, Rosenberg M, Santella M, Hussain KJ, Laursen BW, Sørensen TJ. Tuning the p K a of a pH Responsive Fluorophore and the Consequences for Calibration of Optical Sensors Based on a Single Fluorophore but Multiple Receptors. ACS Sens 2019; 4:764-773. [PMID: 30762336 DOI: 10.1021/acssensors.9b00148] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Since Sørensen and Bjerrum defined the pH scale, we have relied on two methods for determining pH, the colorimetric or the electrochemical. For pH electrodes, calibration is easy as a linear response is observed in the interesting pH range from 1 to ∼12. For colorimetric sensors, the response follows the sigmoidal Bjerrum diagram of an acid-base equilibrium. Thus, calibration of colorimetric sensors is more complex. Here, seven pH responsive fluorescent dyes based on the same diazaoxatriangulenium (DAOTA) fluorophore linked to varying receptor groups were prepared. Photoinduced electron transfer (PeT) quenching from appended aniline or phenol receptors generated the pH response of the DAOTA dyes, and the position of the p Ka value of the dye was tuned using the Hammett relationship as a guideline. The fluorescence intensity of the dyes in a sol-gel matrix environment was measured as a function of pH in universal buffer, and it was found that the dyes behave as perfect pH responsive probes under these conditions. The response of optical pH sensors is nonlinear and was found to be limited to 2-3 pH units for a precision of 0.01 pH unit. As sensors with a broader sensitivity range can be achieved by mixing multiple dyes with different p Ka values, mixtures of dyes in solution were investigated, and a broad range pH sensor with a precision of 0.006 pH units over a range of 3.6 pH units was demonstrated. Further, approximating the sensor response as linear was considered, and a limiting precision for this approach was determined. As the responses of the pH responsive DAOTA dyes were found to be ideally sigmoidal and as the six dyes were shown to have p Ka values scattered over a range from ∼2 to ∼9, this allows for design of a broad range optical pH sensor in the pH range from 1 to 10. This hypothesis was tested using quaternary mixtures of the different DAOTA dyes, and these were found to behave as a direct sum of the individual components. Thus, while linear calibration is limited to a precision of 0.02 in a range of 2-3 pH units, calibration using ideal sigmoidal functions is possible in the range of 1-10 with a precision better than 0.01, and as good as 0.002 pH units.
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Affiliation(s)
- Christian G. Frankær
- Nano-Science Center and Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen Ø, Denmark
- FRS-systems ApS, Hovedgaden 20, 4621 Gadstrup, Denmark
| | - Martin Rosenberg
- Nano-Science Center and Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen Ø, Denmark
| | - Marco Santella
- Nano-Science Center and Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen Ø, Denmark
| | | | - Bo W. Laursen
- Nano-Science Center and Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen Ø, Denmark
| | - Thomas J. Sørensen
- Nano-Science Center and Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen Ø, Denmark
- FRS-systems ApS, Hovedgaden 20, 4621 Gadstrup, Denmark
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Gill AAS, Singh S, Thapliyal N, Karpoormath R. Nanomaterial-based optical and electrochemical techniques for detection of methicillin-resistant Staphylococcus aureus: a review. Mikrochim Acta 2019; 186:114. [PMID: 30648216 DOI: 10.1007/s00604-018-3186-7] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Accepted: 12/14/2018] [Indexed: 12/15/2022]
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA) is responsible for a number of life-threatening complications in humans. Mutations in the genetic sequence of S. aureus due to the presence of certain genes results in resistance against β-lactamases. Thus, there is an urgent need for developing highly sensitive techniques for the early detection of MRSA to counter the rise in resistant strains. This review (142 refs.) extensively covers literature reports on nanomaterial-based optical and electrochemical sensors from the year 1983 to date, with particularly emphasis on recent advances in electrochemical sensing (such as voltammetry and impedimetric) and optical sensing (such as colorimetry and fluorometry) techniques. Among the electrochemical methods, various nanomaterials were employed for the modification of electrodes. Whereas, in optical assays, formats such as enzyme linked immunosorbent assay, lateral flow assays or in optical fiber systems are common. In addition, novel sensing platforms are reported by applying advanced nanomaterials which include gold nanoparticles, nanotitania, graphene, graphene-oxide, cadmium telluride and related quantum dots, nanocomposites, upconversion nanoparticles and bacteriophages. Finally, closing remarks and an outlook conclude the review. Graphical abstract Schematic of the diversity of nanomaterial-based methods for detection of methicillin-resistant Staphylococcus aureus (MRSA). AuNPs: gold nanoparticles; QDs: quantum dots; PVL: Panton-Valentine leukocidin; mecA gene: mec-gene complex encoding methicillin resistance.
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Affiliation(s)
- Atal A S Gill
- Department of Pharmaceutical Chemistry, College of Health Sciences, University of KwaZulu-Natal, Durban, 4000, South Africa
| | - Sima Singh
- Department of Pharmaceutical Chemistry, College of Health Sciences, University of KwaZulu-Natal, Durban, 4000, South Africa
| | - Neeta Thapliyal
- Department of Applied Science, Women Institute of Technology, Sudhowala, Dehradun, Uttarakhand, 248007, India
| | - Rajshekhar Karpoormath
- Department of Pharmaceutical Chemistry, College of Health Sciences, University of KwaZulu-Natal, Durban, 4000, South Africa.
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14
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Recent development of fiber-optic chemical sensors and biosensors: Mechanisms, materials, micro/nano-fabrications and applications. Coord Chem Rev 2018. [DOI: 10.1016/j.ccr.2018.08.001] [Citation(s) in RCA: 133] [Impact Index Per Article: 22.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Abstract
Ozone (O3) gas is widely used as a strong oxidizing agent for many purposes, such as the decomposition/removal of organic contaminants and photoresist, and the deodorization/disinfection of air and water. However, ozone is highly toxic to the human body when the air concentration exceeds about 1 ppm. Therefore, there is increasing demand for simple, sensitive, reliable, and cost-effective techniques for sensing ozone gas. This article describes the features, advantages, and disadvantages of the available, practical techniques for sensing ozone gas in ambient air. The advantages of optical gas sensors as next-generation sensors is specifically introduced. The features of photoluminescent, semiconductor nanoparticles (quantum dots, QDs) as bright phosphors with the potential for various applications is further explored. Lastly, recent research results demonstrating the ozone sensitivity of photoluminescent CdSe-based core-shell quantum dots are presented. These results strongly suggest that optical ozone sensing using photoluminescent quantum dots is a promising technique.
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Affiliation(s)
- Masanori Ando
- Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST)
| | - Vasudevanpillai Biju
- Research Institute for Electronic Science and Graduate School of Environmental Science, Hokkaido University
| | - Yasushi Shigeri
- Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST)
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16
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Okazaki T, Shiokawa E, Orii T, Yamamoto T, Hata N, Taguchi A, Sugawara K, Kuramitz H. Simultaneous Multiselective Spectroelectrochemical Fiber-Optic Sensor: Sensing with an Optically Transparent Electrode. Anal Chem 2018; 90:2440-2445. [DOI: 10.1021/acs.analchem.7b03957] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Takuya Okazaki
- Department
of Environmental Biology and Chemistry, Graduate School of Science
and Engineering for Research, University of Toyama, 3190 Gofuku, Toyama 930-8555, Japan
| | - Eri Shiokawa
- Department
of Environmental Biology and Chemistry, Graduate School of Science
and Engineering for Research, University of Toyama, 3190 Gofuku, Toyama 930-8555, Japan
| | - Tatsuya Orii
- Department
of Environmental Biology and Chemistry, Graduate School of Science
and Engineering for Research, University of Toyama, 3190 Gofuku, Toyama 930-8555, Japan
| | - Takamichi Yamamoto
- Department
of Environmental Biology and Chemistry, Graduate School of Science
and Engineering for Research, University of Toyama, 3190 Gofuku, Toyama 930-8555, Japan
| | - Noriko Hata
- Department
of Environmental Biology and Chemistry, Graduate School of Science
and Engineering for Research, University of Toyama, 3190 Gofuku, Toyama 930-8555, Japan
| | - Akira Taguchi
- Hydrogen
Isotope Research Center, University of Toyama, 3190 Gofuku, Toyama 930-8555, Japan
| | | | - Hideki Kuramitz
- Department
of Environmental Biology and Chemistry, Graduate School of Science
and Engineering for Research, University of Toyama, 3190 Gofuku, Toyama 930-8555, Japan
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17
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Deng S, Wang P, Yu X. Phase-Sensitive Surface Plasmon Resonance Sensors: Recent Progress and Future Prospects. SENSORS (BASEL, SWITZERLAND) 2017; 17:E2819. [PMID: 29206182 PMCID: PMC5751602 DOI: 10.3390/s17122819] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Revised: 11/27/2017] [Accepted: 11/29/2017] [Indexed: 12/18/2022]
Abstract
Surface plasmon resonance (SPR) is an optical sensing technique that is capable of performing real-time, label-free and high-sensitivity monitoring of molecular interactions. SPR biosensors can be divided according to their operating principles into angle-, wavelength-, intensity- and phase-interrogated devices. With their complex optical configurations, phase-interrogated SPR sensors generally provide higher sensitivity and throughput, and have thus recently emerged as prominent biosensing devices. To date, several methods have been developed for SPR phase interrogation, including heterodyne detection, polarimetry, shear interferometry, spatial phase modulation interferometry and temporal phase modulation interferometry. This paper summarizes the fundamentals of phase-sensitive SPR sensing, reviews the available methods for phase interrogation of these sensors, and discusses the future prospects for and trends in the development of this technology.
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Affiliation(s)
- Shijie Deng
- State Key Laboratory of Precision Measurement Technology and Instruments, Tsinghua University, Beijing 100084, China.
| | - Peng Wang
- State Key Laboratory of Precision Measurement Technology and Instruments, Tsinghua University, Beijing 100084, China.
| | - Xinglong Yu
- State Key Laboratory of Precision Measurement Technology and Instruments, Tsinghua University, Beijing 100084, China.
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18
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Okazaki T, Orii T, Ueda A, Ozawa A, Kuramitz H. Fiber Optic Sensor for Real-Time Sensing of Silica Scale Formation in Geothermal Water. Sci Rep 2017; 7:3387. [PMID: 28611412 PMCID: PMC5469775 DOI: 10.1038/s41598-017-03530-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2017] [Accepted: 04/28/2017] [Indexed: 11/09/2022] Open
Abstract
We present a novel fiber optic sensor for real-time sensing of silica scale formation in geothermal water. The sensor is fabricated by removing the cladding of a multimode fiber to expose the core to detect the scale-formation-induced refractive index change. A simple experimental setup was constructed to measure the transmittance response using white light as a source and a spectroscopy detector. A field test was performed on geothermal water containing 980 mg/L dissolved silica at 93 °C in Sumikawa Geothermal Power Plant, Japan. The transmittance response of the fiber sensor decreased due to the formation of silica scale on the fiber core from geothermal water. An application of this sensor in the evaluation of scale inhibitors was demonstrated. In geothermal water containing a pH modifier, the change of transmittance response decreased with pH decrease. The effectiveness of a polyelectrolyte inhibitor in prevention of silica scale formation was easily detectable using the fiber sensor in geothermal water.
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Affiliation(s)
- Takuya Okazaki
- Department of Environmental Biology and Chemistry, Graduate School of Science and Engineering for Research, University of Toyama, Gofuku 3190, Toyama, 930-8555, Japan
| | - Tatsuya Orii
- Department of Environmental Biology and Chemistry, Graduate School of Science and Engineering for Research, University of Toyama, Gofuku 3190, Toyama, 930-8555, Japan
| | - Akira Ueda
- Department of Environmental Biology and Chemistry, Graduate School of Science and Engineering for Research, University of Toyama, Gofuku 3190, Toyama, 930-8555, Japan
| | - Akiko Ozawa
- Natural Resources, Environment and Energy Engineering Division, Mitsubishi Materials Techno Corporation, Kudankita 1-14-16, Chiyoda-ku, Tokyo, 102-8205, Japan
| | - Hideki Kuramitz
- Department of Environmental Biology and Chemistry, Graduate School of Science and Engineering for Research, University of Toyama, Gofuku 3190, Toyama, 930-8555, Japan.
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19
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ORII T, OKAZAKI T, HATA N, SUGAWARA K, RAHMAN FA, KURAMITZ H. Development of an Attenuated Total Reflection Based Fiber-Optic Sensor for Real-time Sensing of Biofilm Formation. ANAL SCI 2017; 33:883-887. [DOI: 10.2116/analsci.33.883] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Tatsuya ORII
- Department of Environmental Biology and Chemistry, Graduate School of Science and Engineering for Research, University of Toyama
| | - Takuya OKAZAKI
- Department of Environmental Biology and Chemistry, Graduate School of Science and Engineering for Research, University of Toyama
| | - Noriko HATA
- Department of Environmental Biology and Chemistry, Graduate School of Science and Engineering for Research, University of Toyama
| | | | - Faidz A. RAHMAN
- Department of Electrical and Electronic Engineering, Lee Kong Chian Faculty of Engineering and Science, Universiti Tunku Abdul Rahman
| | - Hideki KURAMITZ
- Department of Environmental Biology and Chemistry, Graduate School of Science and Engineering for Research, University of Toyama
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20
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Zou X, Pan T, Chen L, Tian Y, Zhang W. Luminescence materials for pH and oxygen sensing in microbial cells - structures, optical properties, and biological applications. Crit Rev Biotechnol 2016; 37:723-738. [PMID: 27627832 DOI: 10.1080/07388551.2016.1223011] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Luminescence including fluorescence and phosphorescence sensors have been demonstrated to be important for studying cell metabolism, and diagnosing diseases and cancer. Various design principles have been employed for the development of sensors in different formats, such as organic molecules, polymers, polymeric hydrogels, and nanoparticles. The integration of the sensing with fluorescence imaging provides valuable tools for biomedical research and applications at not only bulk-cell level but also at single-cell level. In this article, we critically reviewed recent progresses on pH, oxygen, and dual pH and oxygen sensors specifically for their application in microbial cells. In addition, we focused not only on sensor materials with different chemical structures, but also on design and applications of sensors for better understanding cellular metabolism of microbial cells. Finally, we also provided an outlook for future materials design and key challenges in reaching broad applications in microbial cells.
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Affiliation(s)
- Xianshao Zou
- a Department of Materials Science and Engineering , South University of Science and Technology of China , Shenzhen , Guangdong , P.R. China
| | - Tingting Pan
- a Department of Materials Science and Engineering , South University of Science and Technology of China , Shenzhen , Guangdong , P.R. China
| | - Lei Chen
- b Laboratory of Synthetic Microbiology, School of Chemical Engineering & Technology , Tianjin University , Tianjin , P.R. China.,c Key Laboratory of Systems Bioengineering, Ministry of Education of China , Tianjin , P.R. China.,d SynBio Platform, Collaborative Innovation Center of Chemical Science and Engineering , Tianjin , P.R. China
| | - Yanqing Tian
- a Department of Materials Science and Engineering , South University of Science and Technology of China , Shenzhen , Guangdong , P.R. China
| | - Weiwen Zhang
- b Laboratory of Synthetic Microbiology, School of Chemical Engineering & Technology , Tianjin University , Tianjin , P.R. China.,c Key Laboratory of Systems Bioengineering, Ministry of Education of China , Tianjin , P.R. China.,d SynBio Platform, Collaborative Innovation Center of Chemical Science and Engineering , Tianjin , P.R. China
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21
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Liang G, Luo Z, Liu K, Wang Y, Dai J, Duan Y. Fiber Optic Surface Plasmon Resonance–Based Biosensor Technique: Fabrication, Advancement, and Application. Crit Rev Anal Chem 2015; 46:213-23. [DOI: 10.1080/10408347.2015.1045119] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Gaoling Liang
- College of Chemistry, Sichuan University, Chengdu, China
| | - Zewei Luo
- Research Center of Analytical Instrumentation, Key Laboratory of Bio-resource and Eco-environment, Sichuan University, Chengdu, China
| | - Kunping Liu
- College of Chemistry, Sichuan University, Chengdu, China
- Faculty of Biotechnology Industry, Chengdu University, Chengdu, China
| | - Yimin Wang
- Research Center of Analytical Instrumentation, Key Laboratory of Bio-resource and Eco-environment, Sichuan University, Chengdu, China
| | - Jianxiong Dai
- Analytical and Testing Center, Sichuan University, Chengdu, China
| | - Yixiang Duan
- Research Center of Analytical Instrumentation, Key Laboratory of Bio-resource and Eco-environment, Sichuan University, Chengdu, China
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22
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Okazaki T, Imai K, Sultana A, Hata N, Taguchi S, Kuramitz H. Development of a Fiber Optic Evanescent Wave Sensor for Anionic Surfactants Using Ethyl Violet. ANAL LETT 2015. [DOI: 10.1080/00032719.2015.1022822] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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23
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Qi J, Liu D, Liu X, Guan S, Shi F, Chang H, He H, Yang G. Fluorescent pH Sensors for Broad-Range pH Measurement Based on a Single Fluorophore. Anal Chem 2015; 87:5897-904. [DOI: 10.1021/acs.analchem.5b00053] [Citation(s) in RCA: 85] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Jing Qi
- Department
of Chemistry, Nankai University, 94 Weijin Road, Tianjin 300071, P.R. China
| | - Daying Liu
- Department
of Chemistry, Nankai University, 94 Weijin Road, Tianjin 300071, P.R. China
| | - Xiaoyan Liu
- Department
of Chemistry, Nankai University, 94 Weijin Road, Tianjin 300071, P.R. China
| | - Shiquan Guan
- Heowns Biochem Technologies LLC, 6 Lanyuan Road, Tianjin 300384, P.R. China
| | - Fengli Shi
- Heowns Biochem Technologies LLC, 6 Lanyuan Road, Tianjin 300384, P.R. China
| | - Hexi Chang
- Heowns Biochem Technologies LLC, 6 Lanyuan Road, Tianjin 300384, P.R. China
| | - Huarui He
- Heowns Biochem Technologies LLC, 6 Lanyuan Road, Tianjin 300384, P.R. China
| | - Guangming Yang
- Department
of Chemistry, Nankai University, 94 Weijin Road, Tianjin 300071, P.R. China
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24
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Wang C, Ohodnicki PR, Su X, Keller M, Brown TD, Baltrus JP. Novel silica surface charge density mediated control of the optical properties of embedded optically active materials and its application for fiber optic pH sensing at elevated temperatures. NANOSCALE 2015; 7:2527-2535. [PMID: 25572664 DOI: 10.1039/c4nr06232a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Silica and silica incorporated nanocomposite materials have been extensively studied for a wide range of applications. Here we demonstrate an intriguing optical effect of silica that, depending on the solution pH, amplifies or attenuates the optical absorption of a variety of embedded optically active materials with very distinct properties, such as plasmonic Au nanoparticles, non-plasmonic Pt nanoparticles, and the organic dye rhodamine B (not a pH indicator), coated on an optical fiber. Interestingly, the observed optical response to varying pH appears to follow the surface charge density of the silica matrix for all the three different optically active materials. To the best of our knowledge, this optical effect has not been previously reported and it appears universal in that it is likely that any optically active material can be incorporated into the silica matrix to respond to solution pH or surface charge density variations. A direct application of this effect is for optical pH sensing which has very attractive features that can enable minimally invasive, remote, real time and continuous distributed pH monitoring. Particularly, as demonstrated here, using highly stable metal nanoparticles embedded in an inorganic silica matrix can significantly improve the capability of pH sensing in extremely harsh environments which is of increasing importance for applications in unconventional oil and gas resource recovery, carbon sequestration, water quality monitoring, etc. Our approach opens a pathway towards possible future development of robust optical pH sensors for the most demanding environmental conditions. The newly discovered optical effect of silica also offers the potential for control of the optical properties of optically active materials for a range of other potential applications such as electrochromic devices.
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Affiliation(s)
- Congjun Wang
- National Energy Technology Laboratory, U.S. Department of Energy, 626 Cochrans Mill Road, Pittsburgh, PA 15236, USA.
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25
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Imai K, Okazaki T, Hata N, Taguchi S, Sugawara K, Kuramitz H. Simultaneous Multiselective Spectroelectrochemical Fiber-Optic Sensor: Demonstration of the Concept Using Methylene Blue and Ferrocyanide. Anal Chem 2015; 87:2375-82. [DOI: 10.1021/ac504321u] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Kenichiro Imai
- Department
of Environmental Biology and Chemistry, Graduate School of Science
and Engineering for Research, University of Toyama, Gofuku, Toyama 930-8555, Japan
| | - Takuya Okazaki
- Department
of Environmental Biology and Chemistry, Graduate School of Science
and Engineering for Research, University of Toyama, Gofuku, Toyama 930-8555, Japan
| | - Noriko Hata
- Department
of Environmental Biology and Chemistry, Graduate School of Science
and Engineering for Research, University of Toyama, Gofuku, Toyama 930-8555, Japan
| | - Shigeru Taguchi
- Department
of Environmental Biology and Chemistry, Graduate School of Science
and Engineering for Research, University of Toyama, Gofuku, Toyama 930-8555, Japan
| | | | - Hideki Kuramitz
- Department
of Environmental Biology and Chemistry, Graduate School of Science
and Engineering for Research, University of Toyama, Gofuku, Toyama 930-8555, Japan
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26
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OKAZAKI T, IMAI K, TAN SY, YONG YT, RAHMAN FA, HATA N, TAGUCHI S, UEDA A, KURAMITZ H. Fundamental Study on the Development of Fiber Optic Sensor for Real-time Sensing of CaCO 3 Scale Formation in Geothermal Water. ANAL SCI 2015; 31:177-83. [DOI: 10.2116/analsci.31.177] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Takuya OKAZAKI
- Department of Environmental Biology and Chemistry, Graduate School of Science and Engineering for Research, University of Toyama
| | - Kenichiro IMAI
- Department of Environmental Biology and Chemistry, Graduate School of Science and Engineering for Research, University of Toyama
| | - Shin Y. TAN
- Department of Electronic Engineering, Faculty of Engineering and Green Technology, Universiti Tunku Abdul Rahman, Jalan Universiti
| | - Yun T. YONG
- Department of Electronic Engineering, Faculty of Engineering and Green Technology, Universiti Tunku Abdul Rahman, Jalan Universiti
| | - Faidz A. RAHMAN
- Department of Electrical and Electronic Engineering, Lee Kong Chian Faculty of Engineering and Science, Universiti Tunku Abdul Rahman, Jalan Genting Kelang
| | - Noriko HATA
- Department of Environmental Biology and Chemistry, Graduate School of Science and Engineering for Research, University of Toyama
| | - Shigeru TAGUCHI
- Department of Environmental Biology and Chemistry, Graduate School of Science and Engineering for Research, University of Toyama
| | - Akira UEDA
- Department of Environmental Biology and Chemistry, Graduate School of Science and Engineering for Research, University of Toyama
| | - Hideki KURAMITZ
- Department of Environmental Biology and Chemistry, Graduate School of Science and Engineering for Research, University of Toyama
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27
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Bahramian A. Viscoelastic properties of polyaniline-emeraldine base nanostructured films: Experimental results and molecular dynamics simulations. J Appl Polym Sci 2014. [DOI: 10.1002/app.41858] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Alireza Bahramian
- Department of Chemical Engineering; Hamedan University of Technology; Hamedan 65155 Iran
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28
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Wang S, Liu C, Wang H, Chen G, Cong M, Song W, Jia Q, Xu S, Xu W. A surface-enhanced Raman scattering optrode prepared by in situ photoinduced reactions and its application for highly sensitive on-chip detection. ACS APPLIED MATERIALS & INTERFACES 2014; 6:11706-11713. [PMID: 24978908 DOI: 10.1021/am503881h] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
A surface-enhanced Raman scattering (SERS)-active optical fiber sensor combining the optical fiber waveguide with various SERS substrates has been a powerful analytical tool for in situ and long-distance SERS detection with high sensitivity. The design and modification of a high-quality SERS-active sensing layer are important topics in the development of novel SERS-active optical fiber sensors. Here, we prepared a highly sensitive SERS-active optrode by in situ fabrication of a three-dimensional porous structure on the optical fiber end via a photoinduced polymerization reaction, followed by the growth of photochemical silver nanoparticles above the porous polymer material. The fabrication process is rapid (finished within 1 h) and can be on line under light control. The porous structure supports vast silver nanoparticles, which allows for strong electromagnetic enhancement of SERS. Interestingly, the preparation of this SERS optrode and its utilization for SERS detection can all be conducted in a microfluidic chip. The qualitative and quantitative on-chip SERS sensing of organic pollutants and pesticides has been achieved by this SERS optrode-integrated microfluidic chip, and its high detection sensitivity makes it a promising factor in the analysis of liquid systems.
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Affiliation(s)
- Shaoyan Wang
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, Jilin University , 2699 Qianjin Avenue, Changchun 130012, China
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29
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Mehrabani S, Maker AJ, Armani AM. Hybrid integrated label-free chemical and biological sensors. SENSORS (BASEL, SWITZERLAND) 2014; 14:5890-928. [PMID: 24675757 PMCID: PMC4029679 DOI: 10.3390/s140405890] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/11/2014] [Revised: 03/10/2014] [Accepted: 03/14/2014] [Indexed: 12/13/2022]
Abstract
Label-free sensors based on electrical, mechanical and optical transduction methods have potential applications in numerous areas of society, ranging from healthcare to environmental monitoring. Initial research in the field focused on the development and optimization of various sensor platforms fabricated from a single material system, such as fiber-based optical sensors and silicon nanowire-based electrical sensors. However, more recent research efforts have explored designing sensors fabricated from multiple materials. For example, synthetic materials and/or biomaterials can also be added to the sensor to improve its response toward analytes of interest. By leveraging the properties of the different material systems, these hybrid sensing devices can have significantly improved performance over their single-material counterparts (better sensitivity, specificity, signal to noise, and/or detection limits). This review will briefly discuss some of the methods for creating these multi-material sensor platforms and the advances enabled by this design approach.
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Affiliation(s)
- Simin Mehrabani
- Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, CA 90089, USA.
| | - Ashley J Maker
- Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, CA 90089, USA.
| | - Andrea M Armani
- Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, CA 90089, USA.
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30
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Wang XD, Wolfbeis OS. Optical methods for sensing and imaging oxygen: materials, spectroscopies and applications. Chem Soc Rev 2014; 43:3666-761. [PMID: 24638858 DOI: 10.1039/c4cs00039k] [Citation(s) in RCA: 550] [Impact Index Per Article: 55.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
We review the current state of optical methods for sensing oxygen. These have become powerful alternatives to electrochemical detection and in the process of replacing the Clark electrode in many fields. The article (with 694 references) is divided into main sections on direct spectroscopic sensing of oxygen, on absorptiometric and luminescent probes, on polymeric matrices and supports, on additives and related materials, on spectroscopic schemes for read-out and imaging, and on sensing formats (such as waveguide sensing, sensor arrays, multiple sensors and nanosensors). We finally discuss future trends and applications and summarize the properties of the most often used indicator probes and polymers. The ESI† (with 385 references) gives a selection of specific applications of such sensors in medicine, biology, marine and geosciences, intracellular sensing, aerodynamics, industry and biotechnology, among others.
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Affiliation(s)
- Xu-dong Wang
- Institute of Analytical Chemistry, Chemo- and Biosensors, University of Regensburg, D-93040 Regensburg, Germany.
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31
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Vinyard A, Hansen KA, Byrd R, Stuart DA, Hansen JE. Design of a simple cryogenic system for ultraviolet-visible absorption spectroscopy with a back-reflectance fiber optic probe. APPLIED SPECTROSCOPY 2014; 68:118-123. [PMID: 24405962 DOI: 10.1366/13-07129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We report a convenient and inexpensive technique for the rapid acquisition of absorption spectra from small samples at cryogenic temperatures using a home built cryostat with novel collection optics. A cylindrical copper block was constructed with a coaxial bore to hold a 4.00 mm diameter electron paramagnetic resonance (EPR) tube and mounted on a copper feed in thermal contact with liquid nitrogen. A 6.35 mm diameter hole was bored into the side of the cylinder so a fiber optic cable bundle could be positioned orthogonally to the EPR tube. The light passing through the sample is reflected off of the opposing surfaces of the EPR tube and surrounding copper, back through the sample. The emergent light is then collected using the fiber optic bundle and analyzed using a dispersive spectrometer. Absorption spectra for KMnO4 were measured between 400 and 700 nm. Absorption intensity at 506, 525, 545, and 567 nm was found to be proportional to concentration, displaying Beer's law-like behavior. The EPR tube had an internal diameter of 3.2 mm; the double pass of the probe beam through the sample affords a central path length of about 6.4 mm. Comparing these measurements with those recorded on a conventional tabletop spectrometer using a cuvette with a 10.00 mm path length, we consistently found a ratio between intensities of 0.58 rather than the anticipated 0.64. These 6% smaller values we attribute to the curvature of the EPR tube and transmission/reflection losses. This system is particularly well-suited to studying the kinetics and dynamics of chemical reactions at cryogenic temperatures. The rapid response (100 ms) and multiplex advantage provided the opportunity of recording simultaneous time courses at several wavelengths following initiation of a chemical reaction with a pulsed laser source.
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Affiliation(s)
- Andrew Vinyard
- Department of Chemistry, University of West Georgia, 1601 Maple Street, Carrollton, GA 30118 USA
| | - Kaj A Hansen
- Department of Chemistry, University of West Georgia, 1601 Maple Street, Carrollton, GA 30118 USA
| | - Ross Byrd
- Department of Chemistry, University of West Georgia, 1601 Maple Street, Carrollton, GA 30118 USA
| | - Douglas A Stuart
- Department of Chemistry, University of West Georgia, 1601 Maple Street, Carrollton, GA 30118 USA
| | - John E Hansen
- Department of Chemistry, University of West Georgia, 1601 Maple Street, Carrollton, GA 30118 USA
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32
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Affiliation(s)
- Dorota Wencel
- Optical Sensors Laboratory, School of Physical Sciences, Biomedical Diagnostics Institute, Dublin City University , Dublin, 9 Ireland
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33
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Mahmoud WMM, Trautwein C, Leder C, Kümmerer K. Aquatic photochemistry, abiotic and aerobic biodegradability of thalidomide: identification of stable transformation products by LC-UV-MS(n). THE SCIENCE OF THE TOTAL ENVIRONMENT 2013; 463-464:140-150. [PMID: 23792256 DOI: 10.1016/j.scitotenv.2013.05.082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2013] [Revised: 05/03/2013] [Accepted: 05/26/2013] [Indexed: 06/02/2023]
Abstract
Thalidomide (TD), besides being notorious for its teratogenicity, was shown to have immunomodulating and anti-inflammatory activities. This is why recently TD became a promising drug for the treatment of different cancers and inflammatory diseases. Yet nothing is known about the environmental fate of TD, which therefore was assessed experimentally and by in silico prediction programs (quantitative structure activity relationship (QSAR) models) within this study. Photolytic degradation was tested with two different light sources (medium-pressure mercury lamp; xenon lamp) and aerobic biodegradability was investigated with two OECD tests (Closed Bottle test (CBT), Manometric Respirometry test (MRT)). An additional CBT was performed for TD samples after 16 min of UV-photolysis. The primary elimination of TD was monitored and the structures of its photo-, abiotic and biodegradation products were elucidated by HPLC-UV-Fluorescence-MS(n). Furthermore, elimination of dissolved organic carbon was monitored in the photolysis experiment. LC-MS revealed that new photolytic transformation products (TPs) were identified, among them two isomers of TD with the same molecular mass. These TPs were different to the products formed by biodegradation. The experimental findings were compared with the results obtained from the in silico prediction programs where e.g. a good correlation for TD biodegradation in the CBT was confirmed. Moreover, some of the identified TPs were also structurally predicted by the MetaPC software. These results demonstrate that TD and its TPs are not readily biodegradable and not fully mineralized by photochemical treatment. They may therefore pose a risk to the aquatic environment due to the pharmacological activity of TD and unknown properties of its TPs. The applied techniques within this study emphasize the importance of QSAR models as a tool for estimating environmental risk assessments.
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Affiliation(s)
- Waleed M M Mahmoud
- Sustainable Chemistry and Material Resources, Institute of Sustainable and Environmental Chemistry, Faculty of Sustainability, Leuphana University of Lüneburg, Scharnhorststraße 1/C13, DE-21335 Lüneburg, Germany; Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Suez Canal University, Ismailia 41522, Egypt.
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34
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Considerations in upstream bioprocess monitoring and statistical data analysis in the context of process analytical technology and quality by design. ACTA ACUST UNITED AC 2013. [DOI: 10.4155/pbp.13.16] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Trautwein C, Kümmerer K. Ready biodegradability of trifluoromethylated phenothiazine drugs, structural elucidation of their aquatic transformation products, and identification of environmental risks studied by LC-MS( n ) and QSAR. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2012; 19:3162-3177. [PMID: 22678547 DOI: 10.1007/s11356-012-1002-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2012] [Accepted: 05/21/2012] [Indexed: 06/01/2023]
Abstract
The environmental fate of transformation products from organic pollutants such as drugs has become a new research area of increasing interest over the last few years. Whereas in the past mainly parent compounds or their major human metabolites were studied, new questions have arisen what compounds could be formed during incomplete degradation in the aquatic environment and what effects the resulting transformation products might have on nature and mankind. Psychiatric drugs are among the most important prescription drugs worldwide, but so far only little data is provided upon their degradation behavior. This especially accounts for tricyclic antipsychotic drugs of the phenothiazine class. Therefore, the degradation of such drugs was investigated in this study. In this study the aerobic Closed Bottle test (The Organisation for Economic Co-operation and Development (OECD) 301D) was used to assess the ready biodegradability of three trifluoromethylated phenothiazine drugs: fluphenazine, triflupromazine, and trifluoperazine. As it is known from literature that phenothiazine drugs can easily form various photolytic transformation products under light exposure, photochemical transformation was also investigated. Since transformation products are usually not available commercially, the calculation of environmental parameters with the aid of quantitative structure activity relationship (QSAR) software was used for first evaluation of these compounds. According to the OECD test guideline, all trifluoromethylated phenothiazines had to be classified as not readily biodegradable. Chromatographic data revealed the formation of some transformation products. Comparing retention time and mass spectrometric data with the analytical results of the light exposure experiments, we found peaks with the same retention time and mass spectra. So these transformation products were not of bacterial, but photolytic, origin and are formed very quickly even under low light doses. A special chromatographic column and solvent gradient along with multiple stage mass spectrometric fragmentation experiments uncovered the presence of, in total, nine photolytic transformation products and allowed for their structural elucidation. Typical modifications of the molecules were sulfoxidation, exocyclic N-oxidation, and transformation of the trifluoromethyl to a carboxylic moiety. The obtained results of the QSAR calculations show that all transformation products are highly mobile in the aquatic environment and elimination through biotic or abiotic pathways cannot be expected. Transformation products of trifluoromethylated phenothiazine drugs have to be expected in the aquatic environment, yet nothing is known about their toxicological properties. Therefore, further risk assessment upon these drugs and their fate is strongly recommended.
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Affiliation(s)
- Christoph Trautwein
- Department of Environmental Health Sciences, University Medical Centre Freiburg, Breisacher Str. 115B, 79106 Freiburg, Germany.
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37
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Bioreactor monitoring with spectroscopy and chemometrics: a review. Anal Bioanal Chem 2012; 404:1211-37. [DOI: 10.1007/s00216-012-6073-9] [Citation(s) in RCA: 185] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2012] [Accepted: 04/21/2012] [Indexed: 11/26/2022]
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Henning PE, Rigo MV, Geissinger P. Fabrication of a porous fiber cladding material using microsphere templating for improved response time with fiber optic sensor arrays. ScientificWorldJournal 2012; 2012:876106. [PMID: 22654644 PMCID: PMC3354675 DOI: 10.1100/2012/876106] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2011] [Accepted: 01/12/2012] [Indexed: 11/24/2022] Open
Abstract
A highly porous optical-fiber cladding was developed for evanescent-wave fiber sensors, which contains sensor molecules, maintains guiding conditions in the optical fiber, and is suitable for sensing in aqueous environments. To make the cladding material (a poly(ethylene) glycol diacrylate (PEGDA) polymer) highly porous, a microsphere templating strategy was employed. The resulting pore network increases transport of the target analyte to the sensor molecules located in the cladding, which improves the sensor response time. This was demonstrated using fluorescein-based pH sensor molecules, which were covalently attached to the cladding material. Scanning electron microscopy was used to examine the structure of the templated polymer and the large network of interconnected pores. Fluorescence measurements showed a tenfold improvement in the response time for the templated polymer and a reliable pH response over a pH range of five to nine with an estimated accuracy of 0.08 pH units.
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Affiliation(s)
- Paul E Henning
- Department of Chemistry and Biochemistry, University of Wisconsin-Milwaukee, 3210 North Cramer Street, Milwaukee, WI 53212, USA.
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Marin-Suarez M, Medina-Castillo AL, Fernandez-Sanchez JF, Fernandez-Gutierrez A. Atom-Transfer Radical Polymerisation (ATRP) as a Tool for the Development of Optical Sensing Phases. Isr J Chem 2012. [DOI: 10.1002/ijch.201100123] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Degradation of the tricyclic antipsychotic drug chlorpromazine under environmental conditions, identification of its main aquatic biotic and abiotic transformation products by LC–MSn and their effects on environmental bacteria. J Chromatogr B Analyt Technol Biomed Life Sci 2012; 889-890:24-38. [DOI: 10.1016/j.jchromb.2012.01.022] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2011] [Revised: 01/18/2012] [Accepted: 01/20/2012] [Indexed: 11/17/2022]
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Barbe JM, Stern C, Pacholska E, Espinosa E, Guilard R. Improved routes for the synthesis of face-to-face bismacrocycles in porphyrin and corrole series. J PORPHYR PHTHALOCYA 2012. [DOI: 10.1142/s1088424604000283] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Face-to-face bismacrocycles involving porphyrinoid species are still of great interest owing to their versatile properties. Despite the fact that their syntheses generally involve several steps, numerous modifications have been made in their synthetic pathways thus allowing their preparation in gram quantities. Here we report on recent improvements we could propose especially for the synthesis of bisporphyrin, biscorrole and porphyrin-corrole derivatives.
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Affiliation(s)
- Jean-Michel Barbe
- Laboratoire d'Ingénierie Moléculaire pour la Séparation et les Applications des Gaz (LIMSAG UMR 5633), Université de Bourgogne, 6 Boulevard Gabriel, 21000 Dijon, France
| | - Christine Stern
- Laboratoire d'Ingénierie Moléculaire pour la Séparation et les Applications des Gaz (LIMSAG UMR 5633), Université de Bourgogne, 6 Boulevard Gabriel, 21000 Dijon, France
| | - Ewa Pacholska
- Laboratoire d'Ingénierie Moléculaire pour la Séparation et les Applications des Gaz (LIMSAG UMR 5633), Université de Bourgogne, 6 Boulevard Gabriel, 21000 Dijon, France
| | - Enrique Espinosa
- Laboratoire d'Ingénierie Moléculaire pour la Séparation et les Applications des Gaz (LIMSAG UMR 5633), Université de Bourgogne, 6 Boulevard Gabriel, 21000 Dijon, France
| | - Roger Guilard
- Laboratoire d'Ingénierie Moléculaire pour la Séparation et les Applications des Gaz (LIMSAG UMR 5633), Université de Bourgogne, 6 Boulevard Gabriel, 21000 Dijon, France
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Zhang C, Li Y, Wang W, Zhan N, Xiao N, Wang S, Li Y, Yang Q. A novel two-nozzle electrospinning process for preparing microfiber reinforced pH-sensitive nano-membrane with enhanced mechanical property. Eur Polym J 2011. [DOI: 10.1016/j.eurpolymj.2011.09.015] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Yanai N, Kitayama K, Hijikata Y, Sato H, Matsuda R, Kubota Y, Takata M, Mizuno M, Uemura T, Kitagawa S. Gas detection by structural variations of fluorescent guest molecules in a flexible porous coordination polymer. NATURE MATERIALS 2011; 10:787-93. [PMID: 21892178 DOI: 10.1038/nmat3104] [Citation(s) in RCA: 302] [Impact Index Per Article: 23.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2011] [Accepted: 07/26/2011] [Indexed: 05/05/2023]
Abstract
The development of a new methodology for visualizing and detecting gases is imperative for various applications. Here, we report a novel strategy in which gas molecules are detected by signals from a reporter guest that can read out a host structural transformation. A composite between a flexible porous coordination polymer and fluorescent reporter distyrylbenzene (DSB) selectively adsorbed CO₂ over other atmospheric gases. This adsorption induced a host transformation, which was accompanied by conformational variations of the included DSB. This read-out process resulted in a critical change in DSB fluorescence at a specific threshold pressure. The composite shows different fluorescence responses to CO₂ and acetylene, compounds that have similar physicochemical properties. Our system showed, for the first time, that fluorescent molecules can detect gases without any chemical interaction or energy transfer. The host-guest coupled transformations play a pivotal role in converting the gas adsorption events into detectable output signals.
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Affiliation(s)
- Nobuhiro Yanai
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
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Choi HY, Ryu SY, Kim JY, Kim GH, Park SJ, Lee BH, Chang KS. Microlensed dual-fiber probe for depth-resolved fluorescence measurements. OPTICS EXPRESS 2011; 19:14172-14181. [PMID: 21934780 DOI: 10.1364/oe.19.014172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We propose and demonstrate a compact microlensed dual-fiber probe that has a good collection efficiency and a high depth-resolution ability for fluorescence measurements. The probe is formed with a conventional fusion splicer creating a common focusing lens on two fibers placed side by side. The collection efficiency of the fabricated probe was evaluated by measuring the fluorescence signal of a fresh ginkgo leaf. It was shown experimentally that the proposed probe could effectively collect the fluorescence signal with a six-fold increase compared to that of a general flat-tipped probe. The beam propagation method was used to design a probe with an optimized working distance and an improved resolving depth. It was found that the working distance depends mainly on the radius of curvature of the lens, whereas the resolving depth is determined by the core diameters of the illumination and collection fibers. The depth-resolved ability of probes with working distances of ~100 μm and 300 μm was validated by using a two-layer tissue phantom. The experimental results demonstrate that the microlensed dual-fiber probe has the potential to facilitate depth-resolved fluorescence detection of epithelial tissue.
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Affiliation(s)
- Hae Young Choi
- Division of Instrument Development, Korea Basic Science Institute, 113 Gwahangno, Yusung-gu, Daejeon 305-333, Korea
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Guan X, Lai S, Su Z. Facile preparation and potential application of water-soluble polymeric temperature/pH probes bearing fluorescein. J Appl Polym Sci 2011. [DOI: 10.1002/app.34038] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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46
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Luchansky MS, Washburn AL, Martin TA, Iqbal M, Gunn LC, Bailey RC. Characterization of the evanescent field profile and bound mass sensitivity of a label-free silicon photonic microring resonator biosensing platform. Biosens Bioelectron 2010; 26:1283-91. [PMID: 20708399 PMCID: PMC2997171 DOI: 10.1016/j.bios.2010.07.010] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2010] [Revised: 07/03/2010] [Accepted: 07/05/2010] [Indexed: 11/25/2022]
Abstract
Silicon photonic microring resonators have emerged as a sensitive and highly multiplexed platform for real-time biomolecule detection. Herein, we profile the evanescent decay of device sensitivity towards molecular binding as a function of distance from the microring surface. By growing multilayers of electrostatically bound polymers extending from the sensor surface, we are able to empirically determine that the evanescent field intensity is characterized by a 1/e response decay distance of 63 nm. We then applied this knowledge to study the growth of biomolecular assemblies consisting of alternating layers of biotinylated antibody and streptavidin, which follow a more complex growth pattern. Additionally, by monitoring the shift in microring resonance wavelength upon the deposition of a radioactively labeled protein, the mass sensitivity of the ring resonator platform was determined to be 14.7±6.7 [pg/mm(2)]/Δpm. By extrapolating to the instrument noise baseline, the mass/area limit of detection is found to be 1.5±0.7 pg/mm(2). Taking the small surface area of the microring sensor into consideration, this value corresponds to an absolute mass detection limit of 125 ag (i.e. 0.8 zmol of IgG), demonstrating the remarkable sensitivity of this promising label-free biomolecular sensing platform.
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Affiliation(s)
- Matthew S. Luchansky
- Department of Chemistry, Institute for Genomic Biology, and Micro and Nanotechnology Laboratory, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801
| | - Adam L. Washburn
- Department of Chemistry, Institute for Genomic Biology, and Micro and Nanotechnology Laboratory, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801
| | - Teresa A. Martin
- Department of Chemistry, Institute for Genomic Biology, and Micro and Nanotechnology Laboratory, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801
| | - Muzammil Iqbal
- Genalyte, Inc., 11760 Sorrento Valley Road, Suite R, San Diego, CA 92121
| | - L. Cary Gunn
- Genalyte, Inc., 11760 Sorrento Valley Road, Suite R, San Diego, CA 92121
| | - Ryan C. Bailey
- Department of Chemistry, Institute for Genomic Biology, and Micro and Nanotechnology Laboratory, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801
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Peshkova MA, Mikhel’son KN. Ion-selective electrodes under galvanostatic polarization conditions. RUSS J ELECTROCHEM+ 2010. [DOI: 10.1134/s1023193510110054] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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48
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Zhong Z, Fritzsche M, Pieper SB, Wood TK, Lear KL, Dandy DS, Reardon KF. Fiber optic monooxygenase biosensor for toluene concentration measurement in aqueous samples. Biosens Bioelectron 2010; 26:2407-12. [PMID: 21081273 DOI: 10.1016/j.bios.2010.10.021] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2010] [Revised: 10/07/2010] [Accepted: 10/11/2010] [Indexed: 11/19/2022]
Abstract
Measurements of pollutants such as toluene are critical for the characterization of contaminated sites and for the monitoring of remediation processes and wastewater treatment effluents. Fiber optic enzymatic biosensors have the potential to provide cost-effective, real time, continuous, in situ measurements. In this study, a fiber optic enzymatic biosensor was constructed and characterized for the measurement of toluene concentrations in aqueous solutions. The biological recognition element was toluene ortho-monooxygenase (TOM), expressed by Escherichia coli TG1 carrying pBS(Kan)TOM, while an optical fiber coated with an oxygen-sensitive ruthenium-based phosphorescent dye served as the transducer. Toluene was detected based on the enzymatic reaction catalyzed by TOM, which resulted in the consumption of oxygen and changes in the phosphorescence intensity. The biosensor was found to have a limit of detection of 3 μM, a linear signal range up to 100 μM, and a response time of 1 h. The performance was reproducible with different biosensors (RSD=7.4%, n=8). The biosensor activity declined with each measurement and with storage time, particularly at elevated temperatures. This activity loss could be partially reversed by exposure to formate, suggesting that NADH consumption was the primary factor limiting lifetime. This is the first report of an enzymatic toluene sensor and of an oxygenase-based biosensor. Since many oxygenases have been reported, the design concept of this oxygenase-based biosensor has the potential to broaden biosensor applications in environmental monitoring.
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Affiliation(s)
- Zhong Zhong
- Department of Chemical and Biological Engineering, Colorado State University, Fort Collins, CO 80523, USA
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Jung Y, Brambilla G, Richardson DJ. Comparative study of the effective single mode operational bandwidth in sub-wavelength optical wires and conventional single-mode fibers. OPTICS EXPRESS 2009; 17:16619-16624. [PMID: 19770877 DOI: 10.1364/oe.17.016619] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We present the first experimental comparison of effective single mode operation bandwidth in sub-wavelength optical wires (SOWs) and conventional single-mode fibers (SMFs). The full transmission spectrum, half-turn bend loss and mode field diameter were measured and compared for a variety of SMFs of different cut-off wavelength and a SOW. The SOW was shown to offer an enormously broadband single-mode operation bandwidth with a larger mode field area than the SMFs. Applications of SOWs include fiber lasers, sensors, photolithography and optical coherence tomography amongst others.
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Affiliation(s)
- Yongmin Jung
- Optoelectronics Research Centre, University of Southampton, Southampton, SO17 1BJ, UK.
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50
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Muda R, Lewis E, O’Keeffe S, Dooly G, Clifford J. A Compact Optical Fibre Based Mid- Infrared Sensor System for Detection of High Level Carbon Dioxide Emissions in Exhaust Automotive Applications. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.proche.2009.07.148] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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