151
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Luminescence sensors applied to water analysis of organic pollutants--an update. SENSORS 2011; 11:11081-102. [PMID: 22247654 PMCID: PMC3251971 DOI: 10.3390/s111211081] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/27/2011] [Revised: 11/09/2011] [Accepted: 11/18/2011] [Indexed: 01/08/2023]
Abstract
The development of chemical sensors for environmental analysis based on fluorescence, phosphorescence and chemiluminescence signals continues to be a dynamic topic within the sensor field. This review covers the fundamentals of this type of sensors, and an update on recent works devoted to quantifying organic pollutants in environmental waters, focusing on advances since about 2005. Among the wide variety of these contaminants, special attention has been paid polycyclic aromatic hydrocarbons, pesticides, explosives and emerging organic pollutants. The potential of coupling optical sensors with multivariate calibration methods in order to improve the selectivity is also discussed.
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152
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Xiaoxia Z, Weihua N, Qingyong Z, Fengli W, Yingying L, Xiaxia S, Zhonghui L, Guixiang T. Maltose-binding protein isolated from Escherichia coli induces Toll-like receptor 2-mediated viability in U937 cells. Clin Transl Oncol 2011; 13:509-18. [PMID: 21775279 DOI: 10.1007/s12094-011-0689-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
BACKGROUND Stimulation of Toll-like receptors (TLRs) by microbial products has been utilised to potentiate immune responses against haematologic malignancies. The maltose-binding protein (MBP) of Escherichia coli could induce the activation of immune cells via TLR4. The aim of the present study was to investigate whether TLRs mediated the biological effects of MBP on U937 and Jurkat cells in vitro. METHODS We observed the effect of MBP on U937 and Jurkat cells by using the WST, cell cycle analysis and morphological observation. Further, cells were stimulated with MBP for indicated times and doses, and detected by RT-PCR, western blotting, immunohistochemistry and immunofluorescence staining to investigate the mechanisms involved in cell viability. RESULTS MBP enhanced the viability of U937 and Jurkat cells, and the effects were blocked by anti-TLR2, but not anti-TLR4 in U937 cells. Further studies confirmed that MBP was able to directly bind to U937 and Jurkat cells and modulate TLR expression. The effects of MBP depended on the activation of NF-κB and MAP kinase in U937 and Jurkat cells. CONCLUSIONS Our results demonstrated that MBP could directly promote U937 cell viability via TLR2. It suggested that MBP may be used as an adjuvant for participating in the immunotherapy of haematologic malignancies.
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Affiliation(s)
- Zhao Xiaoxia
- Department of Immunology, Jilin University, 2 Xinmin Avenue, Changchun, Ji Lin 130021, People's Republic of China
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153
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Potyrailo RA, Surman C, Nagraj N, Burns A. Materials and transducers toward selective wireless gas sensing. Chem Rev 2011; 111:7315-54. [PMID: 21899304 PMCID: PMC3212628 DOI: 10.1021/cr2000477] [Citation(s) in RCA: 229] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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154
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Li Z. Synthesis, characterization and theoretical analysis on a oxygen-sensing phosphorescent copper(I) complex. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2011; 81:475-480. [PMID: 21742546 DOI: 10.1016/j.saa.2011.06.040] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2011] [Revised: 06/07/2011] [Accepted: 06/16/2011] [Indexed: 05/31/2023]
Abstract
In this paper, we report the synthesis, crystal structure, photophysical properties, and electronic nature of a phosphorescent Cu(I) complex of [Cu(Phen-Ph)(PPh(3))(2)]BF(4), where Phen-Ph and PPh(3) stand for 2-phenyl-1H-imidazo[4,5-f][1,10]phenanthroline and triphenylphosphine, respectively. [Cu(Phen-Ph)(PPh(3))(2)]BF(4) renders a yellow phosphorescence peaking at 553 nm, with a long excited state lifetime of 13.2 μs under N(2) atmosphere. Density functional calculation reveals that the emission comes from a triplet metal-to-ligand-charge-transfer excited state. We electrospun composite nanofibers of [Cu(Phen-Ph)(PPh(3))(2)]BF(4) and polystyrene (PS), hoping to explore the possibility of using the composite nanofibers as an oxygen sensing material. The finally obtained samples with average diameter of ∼400 nm exhibit a maximum sensitivity of 6.52 towards molecular oxygen with short response time of 15 s due to the large surface-area-to-volume ratio of nanofibrous membranes. No photobleaching is detected in these samples.
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Affiliation(s)
- Zheng Li
- School of Land Science and Technology, China University of Geosciences (Beijing), 29 Xueyuan Road, Beijing 100083, PR China. zheng
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155
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Englich FV, Foo TC, Richardson AC, Ebendorff-Heidepriem H, Sumby CJ, Monro TM. Photoinduced electron transfer based ion sensing within an optical fiber. SENSORS 2011; 11:9560-72. [PMID: 22163712 PMCID: PMC3231295 DOI: 10.3390/s111009560] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/08/2011] [Revised: 10/05/2011] [Accepted: 10/07/2011] [Indexed: 11/16/2022]
Abstract
We combine suspended-core microstructured optical fibers with the photoinduced electron transfer (PET) effect to demonstrate a new type of fluorescent optical fiber-dip sensing platform for small volume ion detection. A sensor design based on a simple model PET-fluoroionophore system and small core microstructured optical fiber capable of detecting sodium ions is demonstrated. The performance of the dip sensor operating in a high sodium concentration regime (925 ppm Na(+)) and for lower sodium concentration environments (18.4 ppm Na(+)) is explored and future approaches to improving the sensor's signal stability, sensitivity and selectivity are discussed.
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Affiliation(s)
- Florian V Englich
- Institute for Photonics & Advanced Sensing and School of Chemistry & Physics, The University of Adelaide, North Terrace, SA 5005, Australia.
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156
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Wen C, Tao G, Xu X, Feng X, Luo R. A phosphorescent copper(I) complex: synthesis, characterization, photophysical property, and oxygen-sensing behavior. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2011; 79:1345-1351. [PMID: 21592850 DOI: 10.1016/j.saa.2011.04.067] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2011] [Revised: 04/19/2011] [Accepted: 04/27/2011] [Indexed: 05/30/2023]
Abstract
In this paper, we report the synthesis, crystal structure, photophysical properties, and electronic nature of a phosphorescent Cu(I) complex of [Cu(Phen-Np)(POP)]BF4, where Phen-Np and POP stand for 2-(naphthalen-1-yl)-1H-imidazo[4,5-f][1,10]phenanthroline and bis(2-(diphenylphosphanyl)phenyl) ether, respectively. [Cu(Phen-Np)(POP)]BF4 renders a yellow phosphorescence peaking at 545 nm, with a long excited state lifetime of 4.69 μs. Density functional calculation reveals that the emission comes from a triplet metal-to-ligand-charge-transfer excited state. We electrospun composite nanofibers of [Cu(Phen-Np)(POP)]BF4 and polystyrene (PS), hoping to explore the possibility of using the composite nanofibers as an oxygen sensing material. The finally obtained samples with average diameter of ∼300 nm exhibit a maximum sensitivity of 7.2 towards molecular oxygen with short response time of 7s due to the large surface-area-to-volume ratio of nanofibrous membranes. No photobleaching is detected in these samples.
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Affiliation(s)
- Caihong Wen
- The First College of Clinical Medical Science, China Three Gorges University, and Yichang Central People's Hospital, Yichang 443003, China
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157
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158
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Yingkui L. High performance oxygen sensing nanofibrous membranes of Eu(III) complex/polystyrene prepared by electrospinning. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2011; 79:356-360. [PMID: 21474367 DOI: 10.1016/j.saa.2011.03.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2010] [Revised: 02/14/2011] [Accepted: 03/09/2011] [Indexed: 05/30/2023]
Abstract
In this paper, we report the synthesis, characterization, crystal structure, and photophysical properties of a Eu(3+) complex of Eu(TTA)(3)Phen, where TTA=2-thenoyltrifluoroacetonate, and Phen=1,10-phenanthroline. Its elementary application for oxygen-sensing application is also investigated by doping it into a polymer matrix of polystyrene (PS). Experimental data suggest that the 3wt% doped Eu(TTA)(3)Phen nanofibrous membrane exhibits a high sensitivity of 3.4 towards oxygen with a good linear relationship of R(2)=0.996. In addition, the 3wt% doped Eu(TTA)(3)Phen nanofibrous membrane owns a quick response of 9s towards molecular oxygen, along with its excellent atmosphere insensitivity and photobleaching resistance. All these results suggest that both Eu(TTA)(3)Phen and Eu(TTA)(3)Phen/PS system are promising candidates for oxygen-sensing optical sensors.
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Affiliation(s)
- Li Yingkui
- College of Information, Linyi University, Linyi 276002, PR China.
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159
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Silva LIB, Justino CIL, Lopes I, Pereira R, Freitas AC, Calado R, Rocha-Santos TAP, Panteleitchouk TSL, Pereira ME, Duarte AC. Optical fiber based methodology for assessment of thiocyanate in seawater. JOURNAL OF ENVIRONMENTAL MONITORING : JEM 2011; 13:1811-5. [PMID: 21494749 DOI: 10.1039/c1em10043b] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new methodology for the assessment of thiocyanate (SCN(-)) is proposed based on optical fiber (OF) detection coupled to a liquid chromatography system (LC). The developed methodology showed an adequate performance for the analysis of SCN(-) comparable to a high performance liquid chromatography with UV detector (HPLC-UV) methodology: a detection limit of 3 µg L(-1), a linear range from 4 to 400 µg L(-1), and an analytical time of less than 6 min. The OF based methodology was of compact design and easy operation. This simple system has the potential to be used as a sensing approach for SCN(-) in seawater.
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Affiliation(s)
- Lurdes I B Silva
- CESAM & Department of Chemistry, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal.
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160
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Achatz DE, Meier RJ, Fischer LH, Wolfbeis OS. Luminescent sensing of oxygen using a quenchable probe and upconverting nanoparticles. Angew Chem Int Ed Engl 2011; 50:260-3. [PMID: 21031387 DOI: 10.1002/anie.201004902] [Citation(s) in RCA: 210] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Daniela E Achatz
- Institute of Analytical Chemistry, Chemo- and Biosensors, University of Regensburg, 93040 Regensburg, Germany
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161
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Abstract
In the past decade, the tendency to move from a global, one-size-fits-all treatment philosophy to personalized medicine is based, in part, on the nuanced differences and sub-classifications of disease states. Our knowledge of these varied states stems from not only the ability to diagnose, classify, and perform experiments on cell populations as a whole, but also from new technologies that allow interrogation of cell populations at the individual cell level. Such departures from conventional thinking are driven by the recognition that clonal cell populations have numerous activities that manifest as significant levels of non-genetic heterogeneity. Clonal populations by definition originate from a single genetic origin so are regarded as having a high level of homogeneity as compared to genetically distinct cell populations. However, analysis at the single cell level has revealed a different phenomenon; cells and organisms require an inherent level of non-genetic heterogeneity to function properly, and in some cases, to survive. The growing understanding of this occurrence has lead to the development of methods to monitor, analyze, and better characterize the heterogeneity in cell populations. Following the trend of DNA- and protein microarrays, platforms capable of simultaneously monitoring each cell in a population have been developed. These cellular microarray platforms and other related formats allow for continuous monitoring of single live cells and simultaneously generate individual cell and average population data that are more descriptive and information-rich than traditional bulk methods. These technological advances have helped develop a better understanding of the intricacies associated with biological processes and afforded greater insight into complex biological systems. The associated instruments, techniques, and reagents now allow for highly multiplexed analyses, which enable multiple cellular activities, processes, or pathways to be monitored simultaneously. This critical review will discuss the paradigm shift associated with cellular heterogeneity, speak to the key developments that have lead to our better understanding of systems biology, and detail the future directions of the discipline (281 references).
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Affiliation(s)
- Maureen A Walling
- Department of Chemistry, University at Albany, SUNY, 1400 Washington Ave., Albany, NY 12222, USA
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162
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Borisov SM, Lehner P, Klimant I. Novel optical trace oxygen sensors based on platinum(II) and palladium(II) complexes with 5,10,15,20-meso-tetrakis-(2,3,4,5,6-pentafluorphenyl)-porphyrin covalently immobilized on silica-gel particles. Anal Chim Acta 2011; 690:108-15. [DOI: 10.1016/j.aca.2011.01.057] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2010] [Revised: 01/26/2011] [Accepted: 01/27/2011] [Indexed: 11/28/2022]
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163
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Gu B, Yin M, Zhang AP, Qian J, He S. Optical fiber relative humidity sensor based on FBG incorporated thin-core fiber modal interferometer. OPTICS EXPRESS 2011; 19:4140-4146. [PMID: 21369243 DOI: 10.1364/oe.19.004140] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
A new fiber-optic relative humidity (RH) sensor based on a thin-core fiber modal interferometer (TCFMI) with a fiber Bragg grating (FBG) in between is presented. Poly (N-ethyl-4-vinylpyridinium chloride) (P4VP·HCl) and poly (vinylsulfonic acid, sodium salt) (PVS) are layer-by-layer deposited on the side surface of the sensor for RH sensing. The fabrication of the sensing nanocoating is characterized by using UV-vis absorption spectroscopy, quartz crystal microbalance (QCM) and scanning electron microscopy (SEM). The incorporation of FBG in the middle of TCFMI can compensate the cross sensitivity of the sensor to temperature. The proposed sensor can detect the RH with resolution of 0.78% in a large RH range at different temperatures. A linear, fast and reversible response has been experimentally demonstrated.
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Affiliation(s)
- Bobo Gu
- Centre for Optical and Electromagnetic Research, State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou, China
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164
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Moczko E, Cauchi M, Turner C, Meglinski I, Piletsky S. Optical assay for biotechnology and clinical diagnosis. IEEE Trans Biomed Eng 2011; 58. [PMID: 21317069 DOI: 10.1109/tbme.2011.2113348] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
In this paper, we present an optical diagnostic assay consisting of a mixture of environmental-sensitive fluorescent dyes combined with multivariate data analysis for quantitative and qualitative examination of biological and clinical samples. The performance of the assay is based on the analysis of spectrum of the selected fluorescent dyes with the operational principle similar to electronic nose and electronic tongue systems. This approach has been successfully applied for monitoring of growing cell cultures and identification of gastrointestinal diseases in humans.
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165
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Park J, Lee S, Kim S, Oh K. Enhancement of chemical sensing capability in a photonic crystal fiber with a hollow high index ring defect at the center. OPTICS EXPRESS 2011; 19:1921-1929. [PMID: 21369007 DOI: 10.1364/oe.19.001921] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
A new type of index-guided photonic crystal fiber is proposed to enhance chemical sensing capability by introducing a hollow high index ring defect that consists of the central air hole surrounded by a high index GeO2 doped SiO2 glass ring. Optical properties of the fundamental guided mode were numerically analyzed using the full-vector finite element method varying the design parameters of both the defects in the center and the hexagonal air-silica lattice in the cladding. Enhanced evanescent wave interaction in the holey region and lower confinement loss by an order of magnitude were achieved simultaneously, which shows a high potential in hyper sensitive fiber-optic chemical sensing applications.
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Affiliation(s)
- Jiyoung Park
- Institute of Physics and Applied Physics, Yonsei University, 262 Seongsanno, Seodaemun-gu, Seoul 120-749, South Korea
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166
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Bagshaw EA, Wadham JL, Mowlem M, Tranter M, Eveness J, Fountain AG, Telling J. Determination of dissolved oxygen in the cryosphere: a comprehensive laboratory and field evaluation of fiber optic sensors. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2011; 45:700-705. [PMID: 21121673 DOI: 10.1021/es102571j] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Recent advances in the Cryospheric Sciences have shown that icy environments are host to consortia of microbial communities, whose function and dynamics are often controlled by the concentrations of dissolved oxygen (DO) in solution. To date, only limited spot determinations of DO have been possible in these environments. They reveal the potential for rates of change that exceed realistic manual sampling rates, highlighting the need to explore methods for the continuous measurement of DO concentrations. We report the first comprehensive field and laboratory performance tests of fiber-optic sensors (PreSens, Regensburg, Germany) for measuring DO in icy ecosystems. A series of laboratory tests performed at low and standard temperatures (-5 to 20 °C) demonstrates high precision (0.3% at 50 μmol/kg and 1.3% at 300 μmol/kg), rapid response times (<20 s), and minimal drift (<0.4%). Survival of freeze thaw was problematic, unless the sensor film was mechanically fixed to the fiber and protected by a stainless steel sheath. Results of two field deployments of sensors to the Swiss Alps and Antarctica largely demonstrate a performance consistent with laboratory tests and superior to traditional methods.
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Affiliation(s)
- E A Bagshaw
- Bristol Glaciology Centre, University of Bristol, Bristol, UK.
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167
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Feng L, Zhang Y, Wen L, Chen L, Shen Z, Guan Y. Discrimination of Trace Heavy-Metal Ions by Filtration on Sol-Gel Membrane Arrays. Chemistry 2011; 17:1101-4. [DOI: 10.1002/chem.201003133] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2010] [Indexed: 11/11/2022]
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168
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Wang Q, Guo X, Cai L, Cao Y, Gan L, Liu S, Wang Z, Zhang H, Li L. TiO2-decorated graphenes as efficient photoswitches with high oxygen sensitivity. Chem Sci 2011. [DOI: 10.1039/c1sc00344e] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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169
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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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170
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Silva LIB, Freitas AC, Rocha-Santos TAP, Pereira ME, Duarte AC. Breath analysis by optical fiber sensor for the determination of exhaled organic compounds with a view to diagnostics. Talanta 2010; 83:1586-94. [PMID: 21238756 DOI: 10.1016/j.talanta.2010.11.056] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2010] [Revised: 10/24/2010] [Accepted: 11/22/2010] [Indexed: 12/27/2022]
Abstract
Breath analysis constitutes a promising tool in clinical and analytical fields due to its high potential for non-invasive diagnostics of metabolic disorders and monitoring of disease status. An optical fiber (OF) sensor has been developed for determination of volatile organic compounds (ethane, pentane, heptane, octane, decane, benzene, toluene and styrene) in human breath for clinical diagnosis. The analytical system developed showed a high performance for breath analysis, inferred for the analytical signal intensity and stability, linear range, and detection limits ranging from 0.8 pmol L(-1), for heptane, and to 9.5 pmol L(-1), for decane. The OF sensor also showed advantageous features of near real-time response and low instrumentation costs, besides showing an analytical performance equivalent to the breath analysis by gas chromatography-mass spectrometry (GC-MS), used as the reference method.
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Affiliation(s)
- Lurdes I B Silva
- CESAM & Department of Chemistry, Universidade de Aveiro, Aveiro, Portugal.
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171
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Borchert NB, Ponomarev GV, Kerry JP, Papkovsky DB. O2/pH Multisensor Based on One Phosphorescent Dye. Anal Chem 2010; 83:18-22. [DOI: 10.1021/ac1025754] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Nicolas B. Borchert
- Department of Food Science and Technology, University College Cork, College Road, Cork, Ireland, Institute of Biomedical Chemistry, Moscow, Russia, and Biochemistry Department, University College Cork, Cavanagh Pharmacy Building, College Road, Ireland
| | - Gelii V. Ponomarev
- Department of Food Science and Technology, University College Cork, College Road, Cork, Ireland, Institute of Biomedical Chemistry, Moscow, Russia, and Biochemistry Department, University College Cork, Cavanagh Pharmacy Building, College Road, Ireland
| | - Joe P. Kerry
- Department of Food Science and Technology, University College Cork, College Road, Cork, Ireland, Institute of Biomedical Chemistry, Moscow, Russia, and Biochemistry Department, University College Cork, Cavanagh Pharmacy Building, College Road, Ireland
| | - Dmitri B. Papkovsky
- Department of Food Science and Technology, University College Cork, College Road, Cork, Ireland, Institute of Biomedical Chemistry, Moscow, Russia, and Biochemistry Department, University College Cork, Cavanagh Pharmacy Building, College Road, Ireland
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172
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Miniaturized optical chemosensor for flow-based assays. Anal Bioanal Chem 2010; 399:1381-7. [PMID: 21103867 PMCID: PMC3018244 DOI: 10.1007/s00216-010-4384-2] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2010] [Revised: 10/22/2010] [Accepted: 10/24/2010] [Indexed: 11/11/2022]
Abstract
A cost-effective, highly compact, and versatile optoelectronic device constructed of two ordinary light emitting diodes compatible with optosensing films has been developed. This fibreless device containing chemoreceptor, semiconductor light source, and detector integrated in a miniaturized flow-through cell of low microliter internal volume works as a complete photometric chemical sensor suitable for detection in flow analysis. The operation of the developed device under nonstationary programmable-flow conditions offered by sequential injection analysis has been demonstrated using Prussian Blue film as a model optical chemoreceptor. The unique spectroelectrochemical properties of the sensing material enable its use for optical sensing of redox species, whereby ascorbic acid and hydrogen peroxide have been chosen as model analytes. The reported SI-sensor system features fast and reproducible determination of both analytes in the submillimolar range of concentrations. The construction concept demonstrated in this work can be easily applied to other kinds of optical sensors based on absorbance sensing films.
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173
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Lamb DW, Boerkamp M, Lye PG. Guided-mode refraction model for optical fiber sensing of surface crystal growth. OPTICS LETTERS 2010; 35:3625-3627. [PMID: 21042371 DOI: 10.1364/ol.35.003625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
An empirical "guided-mode refraction model" has been invoked to explain the optical attenuation of radiation in an exposed core optical fiber sensor subject to heterogeneous (surface) crystal growth. Based on Fresnel reflectance values at the internal fiber-crystal and crystal-solution interfaces, the model predictions agree with experimental observations of radial loss of radiation from the fiber core through the crystals as well as attenuation of guided radiation as a function of the radiation launch angle into the fiber.
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Affiliation(s)
- David W Lamb
- Physics & Electronics, School of Science & Technology, University of New England, Armidale, New South Wales, Australia, 2351.
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174
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Songzhu L, Xiangting D, Jinxian W, Guixia L, Wenshen Y, Ruokun J. Fabrication of Eu(III) complex doped nanofibrous membranes and their oxygen-sensing properties. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2010; 77:885-889. [PMID: 20843734 DOI: 10.1016/j.saa.2010.08.025] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2010] [Revised: 07/11/2010] [Accepted: 08/04/2010] [Indexed: 05/29/2023]
Abstract
In this paper, we report the synthesis, characterization, and photophysical properties of Eu(TTA)₃ECIP, where TTA=2-thenoyltrifluoroacetonate, and ECIP=1-ethyl-2-(N-ethyl-carbazole-yl-4-)imidazo[4,5-f]1,10-phenanthroline. Its elementary application for oxygen-sensing application is also investigated by doping it into a polymer matrix of polystyrene (PS). Experimental data suggest that the 2.5 wt% doped Eu(TTA)₃ECIP/PS nanofibrous membrane exhibits a high sensitivity of 3.4 towards oxygen with a good linear relationship of R² = 0.9962. In addition, the 2.5 wt% doped Eu(TTA)₃ECIP/PS nanofibrous membrane owns a quick response of 8s towards oxygen, along with its excellent atmosphere insensitivity and photobleaching resistance. All these results suggest that both Eu(TTA)₃ECIP and Eu(TTA)₃CIP/PS system are promising candidates for oxygen-sensing optical sensors.
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Affiliation(s)
- Lin Songzhu
- School of Chemistry and Environmental Engineering, Changchun University of Science and Technology, Changchun 130022, Jilin, PR China
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175
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Achatz DE, Meier RJ, Fischer LH, Wolfbeis OS. Luminescent Sensing of Oxygen Using a Quenchable Probe and Upconverting Nanoparticles. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201004902] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Daniela E. Achatz
- Institute of Analytical Chemistry, Chemo‐ and Biosensors, University of Regensburg, 93040 Regensburg (Germany)
| | - Robert J. Meier
- Institute of Analytical Chemistry, Chemo‐ and Biosensors, University of Regensburg, 93040 Regensburg (Germany)
| | - Lorenz H. Fischer
- Institute of Analytical Chemistry, Chemo‐ and Biosensors, University of Regensburg, 93040 Regensburg (Germany)
| | - Otto S. Wolfbeis
- Institute of Analytical Chemistry, Chemo‐ and Biosensors, University of Regensburg, 93040 Regensburg (Germany)
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176
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Washburn AL, Bailey RC. Photonics-on-a-chip: recent advances in integrated waveguides as enabling detection elements for real-world, lab-on-a-chip biosensing applications. Analyst 2010; 136:227-36. [PMID: 20957245 DOI: 10.1039/c0an00449a] [Citation(s) in RCA: 78] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
By leveraging advances in semiconductor microfabrication technologies, chip-integrated optical biosensors are poised to make an impact as scalable and multiplexable bioanalytical measurement tools for lab-on-a-chip applications. In particular, waveguide-based optical sensing technology appears to be exceptionally amenable to chip integration and miniaturization, and, as a result, the recent literature is replete with examples of chip-integrated waveguide sensing platforms developed to address a wide range of contemporary analytical challenges. As an overview of the most recent advances within this dynamic field, this review highlights work from the last 2-3 years in the areas of grating-coupled, interferometric, photonic crystal, and microresonator waveguide sensors. With a focus towards device integration, particular emphasis is placed on demonstrations of biosensing using these technologies within microfluidically controlled environments. In addition, examples of multiplexed detection and sensing within complex matrices--important features for real-world applicability--are given special attention.
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Affiliation(s)
- 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, USA
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177
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Mader HS, Wolfbeis OS. Optical ammonia sensor based on upconverting luminescent nanoparticles. Anal Chem 2010; 82:5002-4. [PMID: 20481605 DOI: 10.1021/ac1007283] [Citation(s) in RCA: 174] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The sensor exploits the phenomenon of upconversion luminescence and is based on (a) the use of upconverting nanoparticles (UCNPs) of the NaYF(4):Yb,Er type that can be excited with 980 nm laser light to give a green and red luminescence and (b) the pH probe phenol red immobilized in a polystyrene matrix. Exposure of the sensor film to ammonia causes a strong increase in the 560 nm absorption of the pH probe which, in turn, causes the green emission of the UCNPs to be screened off. The red emission of the UCNPs, in contrast, remains unaffected by ammonia and can serve as a reference signal. Due to the use of 980 nm as the excitation light source, the optical signal obtained is completely free of background visible luminescence of the sample and of scattered light. This is highly advantageous in the case of sensing ammonia in complex matrixes.
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Affiliation(s)
- Heike S Mader
- Institute of Analytical Chemistry, Chemo- and Biosensors, University of Regensburg, D-93040 Regensburg, Germany
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178
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Feng N, Xie J, Zhang D. Synthesis, characterization, photophysical and oxygen-sensing properties of a novel europium(III) complex. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2010; 77:292-296. [PMID: 20541455 DOI: 10.1016/j.saa.2010.05.025] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2010] [Revised: 04/28/2010] [Accepted: 05/15/2010] [Indexed: 05/29/2023]
Abstract
In this paper, we report the synthesis, characterization, crystal structure, and photophysical properties of a novel Eu(3+) complex of Eu(DBM)(3)IPD, where DBM=1,3-diphenyl-propane-1,3-dione and IPD=4-(1H-imidazo[4,5-f][1,10]phenanthrolin-2-yl)-N,N-diphenylaniline. Its elementary application for oxygen-sensing application is also investigated by doping it into a silica matrix of MCM-41. Experimental data suggest that the 20mg/g doped Eu(DBM)(3)IPD/MCM-41 system exhibits a high sensitivity of 3.6 towards molecular oxygen with a good linear relationship of R(2)=0.9987. In addition, the 20 mg/g doped Eu(DBM)(3)IPD/MCM-41 system owns a quick response of 8 s towards oxygen, along with its excellent atmosphere insensitivity and photobleaching resistance. All these results suggest that both Eu(DBM)(3)IPD and Eu(DBM)(3)IPD/MCM-41 systems are promising candidates for oxygen-sensing optical sensors.
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Affiliation(s)
- Nan Feng
- Tianjin University, 92 Weijin Road, Nankai District, Tianjin 300072, PR China
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179
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Martínez-Otero A, Busqué F, Hernando J, Ruiz-Molina D. Structuration of pH-responsive fluorescent molecules on surfaces by soft lithographic techniques. NANOSCALE 2010; 2:1781-1788. [PMID: 20820710 DOI: 10.1039/c0nr00169d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Two different soft lithographic techniques (LCW and microCP) have been successfully used for the structuration of fluorescent pH-responsive molecules on surface. The molecules of choice, fluorescein (1) and a new catechol derivative (2), exhibit several protonation states with distinct emission properties over a large acid-base range. This allowed us to fabricate fluorescent arrays that respond over a large pH-window.
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Affiliation(s)
- Alberto Martínez-Otero
- Centro de Investigación en Nanociencia y Nanotecnología (CIN2, CSIC-ICN), Esfera UAB, Cerdanyola del Vallès, Spain
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180
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Washe AP, Macho S, Crespo GA, Rius FX. Potentiometric Online Detection of Aromatic Hydrocarbons in Aqueous Phase Using Carbon Nanotube-Based Sensors. Anal Chem 2010; 82:8106-12. [DOI: 10.1021/ac101146k] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Alemayehu P. Washe
- Department of Analytical and Organic Chemistry, Universitat Rovira i Virgili, 43007 Tarragona, Spain
| | - Santiago Macho
- Department of Analytical and Organic Chemistry, Universitat Rovira i Virgili, 43007 Tarragona, Spain
| | - Gastón A. Crespo
- Department of Analytical and Organic Chemistry, Universitat Rovira i Virgili, 43007 Tarragona, Spain
| | - F. Xavier Rius
- Department of Analytical and Organic Chemistry, Universitat Rovira i Virgili, 43007 Tarragona, Spain
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181
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Takeuchi A, Miwa T, Shirataka M, Sawada M, Imaizumi H, Sugibuchi H, Ikeda N. Non-cladding optical fiber is available for detecting blood or liquids. J Clin Monit Comput 2010; 24:363-70. [PMID: 20697933 DOI: 10.1007/s10877-010-9255-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2010] [Accepted: 07/29/2010] [Indexed: 11/29/2022]
Abstract
OBJECTIVES Serious accidents during hemodialysis such as an undetected large amount of blood loss are often caused by venous needle dislodgement. A special plastic optical fiber with a low refractive index was developed for monitoring leakage in oil pipelines and in other industrial fields. To apply optical fiber as a bleeding sensor, we studied optical effects of soaking the fiber with liquids and blood in light-loss experimental settings. METHODS The non-cladding optical fiber that was used was the fluoropolymer, PFA fiber, JUNFLON™, 1 mm in diameter and 2 m in length. Light intensity was studied with an ordinary basic circuit with a light emitting source (880 nm) and photodiode set at both terminals of the fiber under certain conditions: bending the fiber, soaking with various mediums, or fixing the fiber with surgical tape. The soaking mediums were reverse osmosis (RO) water, physiological saline, glucose, porcine plasma, and porcine blood. The light intensities regressed to a decaying exponential function with the soaked length. RESULTS The light intensity was not decreased at bending from 20 to 1 cm in diameter. The more the soaked length increased in all mediums, the more the light intensity decreased exponentially. The means of five estimated exponential decay constants were 0.050±0.006 standard deviation in RO water, 0.485±0.016 in physiological saline, 0.404±0.022 in 5% glucose, 0.503±0.038 in blood (Hct 40%), and 0.573±0.067 in plasma. The light intensity decreased from 5 V to about 1.5 V above 5 cm in the soaked length in mediums except for RO water and fixing with surgical tape. CONCLUSIONS We confirmed that light intensity significantly and exponentially decreased with the increased length of the soaked fiber. This phenomena could ideally, clinically be applied to a bleed sensor.
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Affiliation(s)
- Akihiro Takeuchi
- Department of Medical Informatics, School of Allied Health Sciences, Kitasato University, 1-15-1 Kitasato, Minami, Sagamihara, Kanagawa 252-0373, Japan.
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182
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Extended detection range for an optical enzymatic glucose sensor coupling with a novel data-processing method. Sci China Chem 2010. [DOI: 10.1007/s11426-010-3161-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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183
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Stich MIJ, Fischer LH, Wolfbeis OS. Multiple fluorescent chemical sensing and imaging. Chem Soc Rev 2010; 39:3102-14. [PMID: 20571676 DOI: 10.1039/b909635n] [Citation(s) in RCA: 289] [Impact Index Per Article: 20.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Optical sensors, unlike most others, enable multiple sensing of (bio)chemical species by making use of probes whose signals can be differentiated by spectral and/or temporal resolution. Multiple sensors are of substantial interest for continuous monitoring of chemical parameters in complex samples such as blood, bioreactor fluids, in the chemical industry, aerodynamic research, and when monitoring food quality control, to mention typical examples. Moreover, such sensors enable non-invasive, non-toxic and online detection. We discuss in this critical review the state of the art in terms of spectroscopic principles, materials (mainly indicator probes and polymers), and give selected examples for dual and triple sensors along with a look into the future (109 references).
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Affiliation(s)
- Matthias I J Stich
- Institute of Analytical Chemistry, Chemo- and Biosensors, University of Regensburg, D-93040 Regensburg, Germany
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184
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Mosinger J, Lang K, Plístil L, Jesenská S, Hostomský J, Zelinger Z, Kubát P. Fluorescent polyurethane nanofabrics: a source of singlet oxygen and oxygen sensing. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:10050-10056. [PMID: 20222692 DOI: 10.1021/la1001607] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Polyurethane (PUR) nanofabrics based on nanofibers of average diameters in the range of 250-110 nm with different meso-tetraphenylporphyrin (TPP) loading (0.01-5 wt %) were prepared by an electrospinning process. The oxygen quenching of excited states and singlet oxygen-sensitized delayed fluorescence (SODF) of TPP were studied at different oxygen pressures. We found that TPP in PUR matrix is present in monomeric state, and it is easily accessed by oxygen. Analysis of the kinetics of the TPP triplet, singlet oxygen, and SODF indicates that repopulation of TPP fluorescent state includes reaction of singlet oxygen with TPP triplets. The integrated SODF achieved more than 20% of the prompt fluorescence for nanofabric loaded with 5 wt % TPP. The dependence of SODF intensity on the TPP concentration in nanofibers is nearly quadratic.
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Affiliation(s)
- Jirí Mosinger
- Faculty of Science, Charles University in Prague, Hlavova 2030, 128 43 Praha 2, Czech Republic
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185
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186
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Wang XD, Meier R, Link M, Wolfbeis O. Photographing Oxygen Distribution. Angew Chem Int Ed Engl 2010; 49:4907-9. [DOI: 10.1002/anie.201001305] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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187
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Hussain CM, Saridara C, Mitra S. Self-Assembly of Carbon Nanotubes via Ethanol Chemical Vapor Deposition for the Synthesis of Gas Chromatography Columns. Anal Chem 2010; 82:5184-8. [DOI: 10.1021/ac100428m] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Chaudhery Mustansar Hussain
- Department of Chemistry and Environmental Science, New Jersey Institute of Technology, Newark, New Jersey 07102, and Department of Chemistry, Faculty of Science and Technology, Rajamangala University of Technology, Thanyaburi, Thailand
| | - Chutarat Saridara
- Department of Chemistry and Environmental Science, New Jersey Institute of Technology, Newark, New Jersey 07102, and Department of Chemistry, Faculty of Science and Technology, Rajamangala University of Technology, Thanyaburi, Thailand
| | - Somenath Mitra
- Department of Chemistry and Environmental Science, New Jersey Institute of Technology, Newark, New Jersey 07102, and Department of Chemistry, Faculty of Science and Technology, Rajamangala University of Technology, Thanyaburi, Thailand
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188
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Borecki M, Korwin-Pawlowski ML, Beblowska M, Szmidt J, Jakubowski A. Optoelectronic capillary sensors in microfluidic and point-of-care instrumentation. SENSORS (BASEL, SWITZERLAND) 2010; 10:3771-97. [PMID: 22319325 PMCID: PMC3274246 DOI: 10.3390/s100403771] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/15/2010] [Revised: 03/10/2010] [Accepted: 03/30/2010] [Indexed: 11/17/2022]
Abstract
This paper presents a review, based on the published literature and on the authors' own research, of the current state of the art of fiber-optic capillary sensors and related instrumentation as well as their applications, with special emphasis on point-of-care chemical and biochemical sensors, systematizing the various types of sensors from the point of view of the principles of their construction and operation. Unlike classical fiber-optic sensors which rely on changes in light propagation inside the fiber as affected by outside conditions, optical capillary sensors rely on changes of light transmission in capillaries filled with the analyzed liquid, which opens the possibility of interesting new applications, while raising specific issues relating to the construction, materials and instrumentation of those sensors.
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Affiliation(s)
- Michał Borecki
- Institute of Microelectronics and Optoelectronics, Warsaw University of Technology, Koszykowa 75, 00-662 Warsaw, Poland; E-Mails: (M.B.); (J.S.); (A.J.)
| | - Michael L. Korwin-Pawlowski
- Département d’informatique et d’ingénierie, Université du Québec en Outaouais, 101 rue Saint-Jean-Bosco, Gatineau, QC J8X 3X7, Canada; E-Mail:
| | - Maria Beblowska
- Institute of Microelectronics and Optoelectronics, Warsaw University of Technology, Koszykowa 75, 00-662 Warsaw, Poland; E-Mails: (M.B.); (J.S.); (A.J.)
| | - Jan Szmidt
- Institute of Microelectronics and Optoelectronics, Warsaw University of Technology, Koszykowa 75, 00-662 Warsaw, Poland; E-Mails: (M.B.); (J.S.); (A.J.)
| | - Andrzej Jakubowski
- Institute of Microelectronics and Optoelectronics, Warsaw University of Technology, Koszykowa 75, 00-662 Warsaw, Poland; E-Mails: (M.B.); (J.S.); (A.J.)
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189
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Tai YH, Wei PK. Sensitive liquid refractive index sensors using tapered optical fiber tips. OPTICS LETTERS 2010; 35:944-946. [PMID: 20364178 DOI: 10.1364/ol.35.000944] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
An optical fiber sensor based on the change of optical confinement in a subwavelength tip is presented. The optical spot is substantially increased when the environmental refractive index (RI) increases from 1.3 to 1.4. By measuring the intensity of low angular spectral components, an intensity sensitivity up to 8000% per RI unit is achieved. The fiber tip sensors take advantage of the small detection volume and real-time responses. We demonstrate the application of the nanofiber sensors for measuring concentrations of acids and evaporation rates of aqueous mixtures.
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Affiliation(s)
- Yi-Hsin Tai
- Research Center for Applied Sciences, Academia Sinica, Taipei 115, Taiwan
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190
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Plata MR, Contento AM, Ríos A. State-of-the-art of (bio)chemical sensor developments in analytical Spanish groups. SENSORS (BASEL, SWITZERLAND) 2010; 10:2511-76. [PMID: 22319260 PMCID: PMC3274191 DOI: 10.3390/s100402511] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/23/2009] [Revised: 02/03/2010] [Accepted: 02/28/2010] [Indexed: 11/16/2022]
Abstract
(Bio)chemical sensors are one of the most exciting fields in analytical chemistry today. The development of these analytical devices simplifies and miniaturizes the whole analytical process. Although the initial expectation of the massive incorporation of sensors in routine analytical work has been truncated to some extent, in many other cases analytical methods based on sensor technology have solved important analytical problems. Many research groups are working in this field world-wide, reporting interesting results so far. Modestly, Spanish researchers have contributed to these recent developments. In this review, we summarize the more representative achievements carried out for these groups. They cover a wide variety of sensors, including optical, electrochemical, piezoelectric or electro-mechanical devices, used for laboratory or field analyses. The capabilities to be used in different applied areas are also critically discussed.
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Affiliation(s)
- María Reyes Plata
- Department of Analytical Chemistry and Food Technology, Faculty of Chemistry, University of Castilla, La Mancha, 13004, Ciudad Real, Spain; E-Mails: (M.R.P.); (A.M.C.)
| | - Ana María Contento
- Department of Analytical Chemistry and Food Technology, Faculty of Chemistry, University of Castilla, La Mancha, 13004, Ciudad Real, Spain; E-Mails: (M.R.P.); (A.M.C.)
| | - Angel Ríos
- Department of Analytical Chemistry and Food Technology, Faculty of Chemistry, University of Castilla, La Mancha, 13004, Ciudad Real, Spain; E-Mails: (M.R.P.); (A.M.C.)
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191
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Rakow NA, Wendland MS, Trend JE, Poirier RJ, Paolucci DM, Maki SP, Lyons CS, Swierczek MJ. Visual indicator for trace organic volatiles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:3767-3770. [PMID: 20166749 DOI: 10.1021/la903483q] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We describe herein a novel approach for visual indication of trace organic vapors. The sensor utilizes a microporous material within a visual thin film transducer to produce changes in color upon exposure to a very wide range of volatile organic compounds. Visual indication at 5 parts per million (ppm) is demonstrated, with optoelectronic detection achieved to below 50 parts per billion (ppb). Through a thoughtful design of the sensor, we are able to avoid interference from water vapor, a critical attribute needed for practical application.
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Affiliation(s)
- Neal A Rakow
- 3M Company, 3M Center, Building 235-2B-87, St. Paul, Minnesota 55144, USA
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192
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Rich RL, Myszka DG. Grading the commercial optical biosensor literature-Class of 2008: 'The Mighty Binders'. J Mol Recognit 2010; 23:1-64. [PMID: 20017116 DOI: 10.1002/jmr.1004] [Citation(s) in RCA: 109] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Optical biosensor technology continues to be the method of choice for label-free, real-time interaction analysis. But when it comes to improving the quality of the biosensor literature, education should be fundamental. Of the 1413 articles published in 2008, less than 30% would pass the requirements for high-school chemistry. To teach by example, we spotlight 10 papers that illustrate how to implement the technology properly. Then we grade every paper published in 2008 on a scale from A to F and outline what features make a biosensor article fabulous, middling or abysmal. To help improve the quality of published data, we focus on a few experimental, analysis and presentation mistakes that are alarmingly common. With the literature as a guide, we want to ensure that no user is left behind.
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Affiliation(s)
- Rebecca L Rich
- Center for Biomolecular Interaction Analysis, University of Utah, Salt Lake City, UT 84132, USA
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193
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Characterization of micrometer-sized magnetic optical sensor particles produced via spray-drying. MONATSHEFTE FUR CHEMIE 2010. [DOI: 10.1007/s00706-010-0262-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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194
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Liu S, Han G, Shu M, Han L, Che S. Monodispersed inorganic/organic hybrid spherical colloids: Versatile synthesis and their gas-triggered reversibly switchable wettability. ACTA ACUST UNITED AC 2010. [DOI: 10.1039/c0jm02101f] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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195
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Gillanders RN, Arzhakova OV, Hempel A, Dolgova A, Kerry JP, Yarysheva LM, Bakeev NF, Volynskii AL, Papkovsky DB. Phosphorescent Oxygen Sensors Based on Nanostructured Polyolefin Substrates. Anal Chem 2009; 82:466-8. [DOI: 10.1021/ac902406w] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ross N. Gillanders
- Biochemistry Department, Cavanagh Pharmacy Building, University College Cork, Cork, Ireland, Department of Polymer Science, Moscow State University, Leninskie Gory, Moscow, 119991, Russia, and Department of Food Science and Nutrition, University College Cork, College Road, Cork, Ireland
| | - Olga V. Arzhakova
- Biochemistry Department, Cavanagh Pharmacy Building, University College Cork, Cork, Ireland, Department of Polymer Science, Moscow State University, Leninskie Gory, Moscow, 119991, Russia, and Department of Food Science and Nutrition, University College Cork, College Road, Cork, Ireland
| | - Andreas Hempel
- Biochemistry Department, Cavanagh Pharmacy Building, University College Cork, Cork, Ireland, Department of Polymer Science, Moscow State University, Leninskie Gory, Moscow, 119991, Russia, and Department of Food Science and Nutrition, University College Cork, College Road, Cork, Ireland
| | - Alla Dolgova
- Biochemistry Department, Cavanagh Pharmacy Building, University College Cork, Cork, Ireland, Department of Polymer Science, Moscow State University, Leninskie Gory, Moscow, 119991, Russia, and Department of Food Science and Nutrition, University College Cork, College Road, Cork, Ireland
| | - Joe P. Kerry
- Biochemistry Department, Cavanagh Pharmacy Building, University College Cork, Cork, Ireland, Department of Polymer Science, Moscow State University, Leninskie Gory, Moscow, 119991, Russia, and Department of Food Science and Nutrition, University College Cork, College Road, Cork, Ireland
| | - Larisa M. Yarysheva
- Biochemistry Department, Cavanagh Pharmacy Building, University College Cork, Cork, Ireland, Department of Polymer Science, Moscow State University, Leninskie Gory, Moscow, 119991, Russia, and Department of Food Science and Nutrition, University College Cork, College Road, Cork, Ireland
| | - Nikolai F. Bakeev
- Biochemistry Department, Cavanagh Pharmacy Building, University College Cork, Cork, Ireland, Department of Polymer Science, Moscow State University, Leninskie Gory, Moscow, 119991, Russia, and Department of Food Science and Nutrition, University College Cork, College Road, Cork, Ireland
| | - Alexander L. Volynskii
- Biochemistry Department, Cavanagh Pharmacy Building, University College Cork, Cork, Ireland, Department of Polymer Science, Moscow State University, Leninskie Gory, Moscow, 119991, Russia, and Department of Food Science and Nutrition, University College Cork, College Road, Cork, Ireland
| | - Dmitri B. Papkovsky
- Biochemistry Department, Cavanagh Pharmacy Building, University College Cork, Cork, Ireland, Department of Polymer Science, Moscow State University, Leninskie Gory, Moscow, 119991, Russia, and Department of Food Science and Nutrition, University College Cork, College Road, Cork, Ireland
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196
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Wang C. Fiber loop ringdown - a time-domain sensing technique for multi-function fiber optic sensor platforms: current status and design perspectives. SENSORS (BASEL, SWITZERLAND) 2009; 9:7595-621. [PMID: 22408471 PMCID: PMC3292074 DOI: 10.3390/s91007595] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/31/2009] [Revised: 09/09/2009] [Accepted: 09/17/2009] [Indexed: 11/16/2022]
Abstract
Fiber loop ringdown (FLRD) utilizes an inexpensive telecommunications light source, a photodiode, and a section of single-mode fiber to form a uniform fiber optic sensor platform for sensing various quantities, such as pressure, temperature, strain, refractive index, chemical species, biological cells, and small volume of fluids. In FLRD, optical losses of a light pulse in a fiber loop induced by changes in a quantity are measured by the light decay time constants. FLRD measures time to detect a quantity; thus, FLRD is referred to as a time-domain sensing technique. FLRD sensors have near real-time response, multi-pass enhanced high-sensitivity, and relatively low cost (i.e., without using an optical spectral analyzer). During the last eight years since the introduction of the original form of fiber ringdown spectroscopy, there has been increasing interest in the FLRD technique in fiber optic sensor developments, and new application potential is being explored. This paper first discusses the challenging issues in development of multi-function, fiber optic sensors or sensor networks using current fiber optic sensor sensing schemes, and then gives a review on current fiber optic sensor development using FLRD technique. Finally, design perspectives on new generation, multi-function, fiber optic sensor platforms using FLRD technique are particularly presented.
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Affiliation(s)
- Chuji Wang
- Department of Physics, and the Institute for Clean Energy Technology, Mississippi State University, Starkville, MS, 39759, USA; E-Mail: ; Tel.: +1-662-325-9455
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197
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Optical sensors based on whispering gallery modes in fluorescent microbeads: size dependence and influence of substrate. SENSORS 2009; 9:6836-52. [PMID: 22399976 PMCID: PMC3290511 DOI: 10.3390/s90906836] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/07/2009] [Revised: 08/20/2009] [Accepted: 08/20/2009] [Indexed: 11/16/2022]
Abstract
Whispering gallery modes in surface-fixated fluorescent polystyrene microbeads are studied in view of their capability of sensing changes in the refractive index of the beads’ environment by exposing them to water/glycerol mixtures of varying composition. The mode positions are analyzed by simultaneous fitting for mode number, bead radius, and environmental index. Down to a diameter of 8 μm, the sensor response follows the index of the bulk solution very well. For smaller bead sizes, some deviations occur, in particular for fluid indices not too different from that of water, which might be attributed to the presence of the substrate.
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198
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Kauffman DR, Shade CM, Uh H, Petoud S, Star A. Decorated carbon nanotubes with unique oxygen sensitivity. Nat Chem 2009; 1:500-6. [DOI: 10.1038/nchem.323] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2009] [Accepted: 07/07/2009] [Indexed: 12/28/2022]
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199
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Sun LN, Peng H, Stich MIJ, Achatz D, Wolfbeis OS. pH sensor based on upconverting luminescent lanthanide nanorods. Chem Commun (Camb) 2009:5000-2. [PMID: 19668829 DOI: 10.1039/b907822c] [Citation(s) in RCA: 171] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The pH sensor exploits the phenomenon of upconversion luminescence and is based on a hydrogel matrix containing (a) nanorods of the NaYF(4):Er,Yb type that can be excited with 980-nm laser light to give a green and red (dual) emission, and (b) a longwave absorbing pH probe that causes a pH-dependent inner filter effect.
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Affiliation(s)
- Li-Ning Sun
- Institute of Analytical Chemistry, Chemo- and Biosensors, University of Regensburg, D-93040 Regensburg, Germany
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200
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Cottler PS, Karpen WR, Morrow DA, Kaufman KR. Performance characteristics of a new generation pressure microsensor for physiologic applications. Ann Biomed Eng 2009; 37:1638-45. [PMID: 19495983 DOI: 10.1007/s10439-009-9718-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2009] [Accepted: 05/16/2009] [Indexed: 12/13/2022]
Abstract
A next generation fiber-optic microsensor based on the extrinsic Fabry-Perot interferometric (EFPI) technique has been developed for pressure measurements. The basic physics governing the operation of these sensors makes them relatively tolerant or immune to the effects of high-temperature, high-EMI, and highly-corrosive environments. This pressure microsensor represents a significant improvement in size and performance over previous generation sensors. To achieve the desired overall size and sensitivity, numerical modeling of diaphragm deflection was incorporated in the design, with the desired dimensions and calculated material properties. With an outer diameter of approximately 250 microm, a dynamic operating range of over 250 mmHg, and a sampling frequency of 960 Hz, this sensor is ideal for the minimally invasive measurement of physiologic pressures and incorporation in catheter-based instrumentation. Nine individual sensors were calibrated and characterized by comparing the output to a U.S. National Institute of Standards and Technology (NIST) Traceable reference pressure over the range of 0-250 mmHg. The microsensor performance demonstrated accuracy of better than 2% full-scale output, and repeatability, and hysteresis of better than 1% full-scale output. Additionally, fatigue effects on five additional sensors were 0.25% full-scale output after over 10,000 pressure cycles.
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Affiliation(s)
- Patrick S Cottler
- Luna Innovations, Inc., 706 Forest Street, Suite A, Charlottesville, VA 22903, USA.
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