501
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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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502
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Tian Y, Shumway BR, Youngbull AC, Li Y, Jen AKY, Johnson RH, Meldrum DR. Dually Fluorescent Sensing of pH and Dissolved Oxygen Using a Membrane Made from Polymerizable Sensing Monomers. SENSORS AND ACTUATORS. B, CHEMICAL 2010; 147:714-722. [PMID: 20543884 PMCID: PMC2882062 DOI: 10.1016/j.snb.2010.03.029] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Using a thermal polymerization approach and polymerizable pH and oxygen sensing monomers with green and red emission spectra, respectively, new pH, oxygen, and their dual sensing membranes were prepared using poly(2-hydroxyethyl methacrylate)-co-poly(acrylamide) as a matrix. The sensors were grafted on acrylate-modified quartz glass and characterized under different pH values, oxygen concentrations, ion strengths, temperatures and cell culture media. The pH and oxygen sensors were excited using the same excitation wavelength and exhibited well-separated emission spectra. The pH-sensing films showed good response over the pH range 5.5 to 8.5, corresponding to pK(a) values in the biologically-relevant range between 6.9 and 7.1. The oxygen-sensing films exhibited linear Stern-Volmer quenching responses to dissolved oxygen. As the sensing membranes were prepared using thermally initiated polymerization of sensing moiety-containing monomers, no leaching of the sensors from the membranes to buffers or medium was observed. This advantageous characteristic accounts in part for the sensors' biocompatibility without apparent toxicity to HeLa cells after 40 hours incubation. The dual-sensing membrane was used to measure pH and dissolved oxygen simultaneously. The measured results correlated with the set-point values.
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Affiliation(s)
- Yanqing Tian
- Center for Ecogenomics, Biodesign Institute, Arizona State University, Tempe, AZ 85287
- To Whom all correspondence should be addressed: ; Phone: 1-480-965-9601; Fax : 1-480-727-6588
| | - Bradley R. Shumway
- Center for Ecogenomics, Biodesign Institute, Arizona State University, Tempe, AZ 85287
| | - A. Cody Youngbull
- Center for Ecogenomics, Biodesign Institute, Arizona State University, Tempe, AZ 85287
| | - Yongzhong Li
- Center for Ecogenomics, Biodesign Institute, Arizona State University, Tempe, AZ 85287
| | - Alex K.-Y. Jen
- Materials Science & Engineering, University of Washington, Seattle, WA 98195
| | - Roger H. Johnson
- Center for Ecogenomics, Biodesign Institute, Arizona State University, Tempe, AZ 85287
| | - Deirdre R. Meldrum
- Center for Ecogenomics, Biodesign Institute, Arizona State University, Tempe, AZ 85287
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503
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Optical properties of a donor–acceptor-substituted “hemi-cruciform” catechol derivative. J Photochem Photobiol A Chem 2010. [DOI: 10.1016/j.jphotochem.2010.02.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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504
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The Concept of λ-Ratiometry in Fluorescence Sensing and Imaging. J Fluoresc 2010; 20:1099-128. [DOI: 10.1007/s10895-010-0644-y] [Citation(s) in RCA: 170] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2010] [Accepted: 03/16/2010] [Indexed: 11/25/2022]
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505
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Sam S, Chazalviel JN, Gouget-Laemmel AC, Ozanam F, Allongue P, Henry de Villeneuve C, Gabouze N, Djebbar S. Covalent immobilization of amino acids on the porous silicon surface. SURF INTERFACE ANAL 2010. [DOI: 10.1002/sia.3285] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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506
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Biosensors for effective environmental and agrifood protection and commercialization: from research to market. Mikrochim Acta 2010. [DOI: 10.1007/s00604-010-0313-5] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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507
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Choi MG, Cha S, Park JE, Lee H, Jeon HL, Chang SK. Selective Perborate Signaling by Deprotection of Fluorescein and Resorufin Acetates. Org Lett 2010; 12:1468-71. [DOI: 10.1021/ol100126c] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Myung Gil Choi
- Department of Chemistry, Chung-Ang University, Seoul 156-756, Korea
| | - Sunyoung Cha
- Department of Chemistry, Chung-Ang University, Seoul 156-756, Korea
| | - Ji Eun Park
- Department of Chemistry, Chung-Ang University, Seoul 156-756, Korea
| | - Haekyung Lee
- Department of Chemistry, Chung-Ang University, Seoul 156-756, Korea
| | - Hye Lim Jeon
- Department of Chemistry, Chung-Ang University, Seoul 156-756, Korea
| | - Suk-Kyu Chang
- Department of Chemistry, Chung-Ang University, Seoul 156-756, Korea
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508
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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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509
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Affiliation(s)
- Jean-Claude G. Bünzli
- Laboratory of Lanthanide Supramolecular Chemistry, École Polytechnique Fédérale de Lausanne (EPFL), BCH 1402, CH-1015 Lausanne, Switzerland, and Department of Advanced Materials Chemistry, WCU Center for Next Generation Photovoltaic Systems, Korea University, Sejong Campus, 208 Seochang, Jochiwon, Chung Nam 339-700, Republic of Korea
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510
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Orski SV, Fries KH, Sheppard GR, Locklin J. High density scaffolding of functional polymer brushes: surface initiated atom transfer radical polymerization of active esters. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:2136-2143. [PMID: 20099926 DOI: 10.1021/la902553f] [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
In this Article, we describe a method for the polymerization of active esters based on N-hydroxysuccinimide 4-vinyl benzoate (NHS4VB) using surface initiated atom transfer radical polymerization (SI-ATRP). Poly(NHS4VB) brushes have high grafting density and a uniform and smooth morphology, and film thickness increases linearly with reaction time. Block copolymer brushes with 2-hydroxyethyl acrylate, tert-butyl acrylate, and styrene were synthesized from surface bound poly(NHS4VB) macroinitiators. The active ester brushes show rapid and quantitative conversion under aminolysis conditions with primary amines, which was studied using grazing incidence attenuated total reflection Fourier transform infrared (GATR-FTIR) and UV-vis spectroscopy. UV-vis was also used to quantify the amount of reactive groups in polymer brush layers of differing thickness. Functionalization of the active ester pendant groups with chromophores containing primary amines showed a linear correlation between the amount of chromophore incorporated into the brush layer and brush thickness. Grafting densities as high as 25.7 nmol/cm(2) were observed for a 50 nm brush. Block copolymer brushes with buried active ester functional moieties also undergo quantitative conversion with primary amines as confirmed by GATR-FTIR. We discuss the potential of activated ester brushes as universal scaffolds for sensor and microarray surfaces, where the twofold control of functionalizable active ester polymer and block copolymers provides well-ordered, tunable microenvironments.
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Affiliation(s)
- Sara V Orski
- Department of Chemistry, Faculty of Engineering, and the Center for Nanoscale Science and Engineering, University of Georgia, Athens, Georgia 30602, USA
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511
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Boulart C, Connelly D, Mowlem M. Sensors and technologies for in situ dissolved methane measurements and their evaluation using Technology Readiness Levels. Trends Analyt Chem 2010. [DOI: 10.1016/j.trac.2009.12.001] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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512
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Sam S, Touahir L, Salvador Andresa J, Allongue P, Chazalviel JN, Gouget-Laemmel AC, Henry de Villeneuve C, Moraillon A, Ozanam F, Gabouze N, Djebbar S. Semiquantitative study of the EDC/NHS activation of acid terminal groups at modified porous silicon surfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:809-14. [PMID: 19725548 DOI: 10.1021/la902220a] [Citation(s) in RCA: 214] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Infrared spectroscopy is used to investigate the transformation of carboxyl-terminated alkyl chains immobilized on a surface into succinimidyl ester-terminated chains by reaction with an aqueous solution of N-ethyl-N'-(3-(dimethylamino)propyl)carbodiimide (EDC) and N-hydroxysuccinimide (NHS). The acid chains are covalently grafted at the surface of hydrogenated porous silicon whose large specific surface area allows for assessing the activation yield in a semiquantitative way by infrared (IR) spectroscopy and detecting trace amounts of surface products and/or reaction products of small IR cross section. In this way, we rationalize the different reaction paths and optimize the reaction conditions to obtain as pure as possible succinimidyl ester-terminated surfaces. A diagram mapping the surface composition after activation was constructed by systematically varying the solution composition. Results are accounted for by NHS surface adsorption and a kinetic competition between the various EDC-induced surface reactions.
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Affiliation(s)
- S Sam
- Physique de la Matière Condensée, Ecole Polytechnique, CNRS, 91128 Palaiseau, France
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513
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Liu HL, Peng Q, Wu YD, Chen D, Hou XL, Sabat M, Pu L. Highly Enantioselective Recognition of Structurally Diverse α-Hydroxycarboxylic Acids using a Fluorescent Sensor. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.200904889] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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514
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Wang H, Nakata E, Hamachi I. Recent progress in strategies for the creation of protein-based fluorescent biosensors. Chembiochem 2010; 10:2560-77. [PMID: 19693761 DOI: 10.1002/cbic.200900249] [Citation(s) in RCA: 87] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The creation of novel bioanalytical tools for the detection and monitoring of a range of important target substances and biological events in vivo and in vitro is a great challenge in chemical biology and biotechnology. Protein-based fluorescent biosensors--integrated devices that convert a molecular-recognition event to a fluorescent signal--have recently emerged as a powerful tool. As the recognition units various proteins that can specifically recognize and bind a variety of molecules of biological significance with high affinity are employed. For the transducer, fluorescent proteins, such as green fluorescent protein (GFP) or synthetic fluorophores, are mostly adopted. Recent progress in protein engineering and organic synthesis allows us to manipulate proteins genetically and/or chemically, and a library of such protein scaffolds has been significantly expanded by genome projects. In this review, we briefly describe the recent progress of protein-based fluorescent biosensors on the basis of their platform and construction strategy, which are primarily divided into the genetically encoded fluorescent biosensors and chemically constructed biosensors.
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Affiliation(s)
- Hangxiang Wang
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Kyoto 615-8510, Japan
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515
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Resch-Genger U, Grabolle M, Nitschke R, Nann T. Nanocrystals and Nanoparticles Versus Molecular Fluorescent Labels as Reporters for Bioanalysis and the Life Sciences: A Critical Comparison. ADVANCED FLUORESCENCE REPORTERS IN CHEMISTRY AND BIOLOGY II 2010. [DOI: 10.1007/978-3-642-04701-5_1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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516
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Jia L, Xu JP, Li D, Pang SP, Fang Y, Song ZG, Ji J. Fluorescence detection of alkaline phosphatase activity with β-cyclodextrin-modified quantum dots. Chem Commun (Camb) 2010; 46:7166-8. [DOI: 10.1039/c0cc01244k] [Citation(s) in RCA: 123] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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517
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Achatz DE, Ali R, Wolfbeis OS. Luminescent chemical sensing, biosensing, and screening using upconverting nanoparticles. Top Curr Chem (Cham) 2010; 300:29-50. [PMID: 21516435 DOI: 10.1007/128_2010_98] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Abstract
Upconverting nanoparticles (UCNPs) display the unique property of converting near-infrared light (with wavelengths of typically 800-1,000 nm) into visible luminescence. Following a short introduction into the mechanisms leading to the effect, the main classes of materials used are discussed. We then review the state of the art of using UCNPs: (1) to label biomolecules such as antibodies and (synthetic) oligomers for use in affinity assay and flow assays; (2) to act as nanolamps whose emission intensity is modulated by chemical indicators, thus leading to a novel kind of chemical sensors; and (3), to act as donors in luminescence resonance energy transfer in chemical sensors and biosensors.
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Affiliation(s)
- Daniela E Achatz
- Institute of Analytical Chemistry, Chemo- and Biosensors, University of Regensburg, 93040, Regensburg, Germany
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518
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Kim YH, Roh SG, Jung SD, Chung MA, Kim HK, Cho DW. Excited-state intramolecular proton transfer on 2-(2′-hydroxy-4′-R-phenyl)benzothiazole nanoparticles and fluorescence wavelength depending on substituent and temperature. Photochem Photobiol Sci 2010; 9:722-9. [DOI: 10.1039/b9pp00102f] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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519
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Shao N, Jin J, Wang H, Zheng J, Yang R, Chan W, Abliz Z. Design of Bis-spiropyran Ligands as Dipolar Molecule Receptors and Application to in Vivo Glutathione Fluorescent Probes. J Am Chem Soc 2009; 132:725-36. [DOI: 10.1021/ja908215t] [Citation(s) in RCA: 234] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Na Shao
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China, State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China, Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Kowloon, Hong Kong, China, Institute of Materia Medica, Chinese Academy of Medical Science & Peking Union Medical College, Beijing, 100050, China,
| | - Jianyu Jin
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China, State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China, Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Kowloon, Hong Kong, China, Institute of Materia Medica, Chinese Academy of Medical Science & Peking Union Medical College, Beijing, 100050, China,
| | - Hao Wang
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China, State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China, Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Kowloon, Hong Kong, China, Institute of Materia Medica, Chinese Academy of Medical Science & Peking Union Medical College, Beijing, 100050, China,
| | - Jing Zheng
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China, State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China, Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Kowloon, Hong Kong, China, Institute of Materia Medica, Chinese Academy of Medical Science & Peking Union Medical College, Beijing, 100050, China,
| | - Ronghua Yang
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China, State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China, Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Kowloon, Hong Kong, China, Institute of Materia Medica, Chinese Academy of Medical Science & Peking Union Medical College, Beijing, 100050, China,
| | - Winghong Chan
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China, State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China, Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Kowloon, Hong Kong, China, Institute of Materia Medica, Chinese Academy of Medical Science & Peking Union Medical College, Beijing, 100050, China,
| | - Zeper Abliz
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China, State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China, Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Kowloon, Hong Kong, China, Institute of Materia Medica, Chinese Academy of Medical Science & Peking Union Medical College, Beijing, 100050, China,
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520
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Nie H, Liu S, Yu R, Jiang J. Phospholipid-Coated Carbon Nanotubes as Sensitive Electrochemical Labels with Controlled-Assembly-Mediated Signal Transduction for Magnetic Separation Immunoassay. Angew Chem Int Ed Engl 2009; 48:9862-6. [DOI: 10.1002/anie.200903503] [Citation(s) in RCA: 86] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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521
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Peng Y, Jiang D, Su L, Zhang L, Yan M, Du J, Lu Y, Liu YN, Zhou F. Mixed monolayers of ferrocenylalkanethiol and encapsulated horseradish peroxidase for sensitive and durable electrochemical detection of hydrogen peroxide. Anal Chem 2009; 81:9985-92. [PMID: 19928778 PMCID: PMC2795022 DOI: 10.1021/ac901833s] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
This paper describes the construction of a mixed monolayer of ferrocenylalkanethiol and encapsulated horseradish peroxidase (HRP) at a gold electrode for amperometric detection of H(2)O(2) at trace levels. By tuning the alkanethiol chain lengths that tether the HRP enzyme and the ferrocenylalkanethiol (FcC(11)SH) mediator, facile electron transfer between FcC(11)SH and HRP can be achieved. Unlike most HRP-based electrochemical sensors, which rely on HRP-facilitated H(2)O(2) reduction (to H(2)O), the electrocatalytic current is resulted from an HRP-catalyzed oxidation reaction of H(2)O(2) (to O(2)). Upon optimizing other experimental conditions (surface coverage ratio, pH, and flow rate), the electrocatalytic reaction proceeding at the electrode was used to attain a low amperometric detection level (0.64 nM) and a dynamic range spanning over 3 orders of magnitude. Not only does the thin hydrophilic porous HRP capsule allow facile electron transfer, it also enables H(2)O(2) to permeate. More significantly, the enzymatic activity of the encapsulated HRP is retained for a considerably longer period (>3 weeks) than naked HRP molecules attached to an electrode or those wired to a redox polymer thin film. By comparing to electrodes modified with denatured HRP that are subsequently encapsulated or embedded in a poly-L-lysine matrix, it is concluded that the encapsulation has significantly preserved the native structure of HRP and therefore its enzymatic activity. The electrode covered with FcC(11)SH and encapsulated HRP is shown to be capable of rapidly and reproducibly detecting H(2)O(2) present in complex sample media.
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Affiliation(s)
- Yong Peng
- Department of Chemistry and Biochemistry, California State University, Los Angeles, Los Angeles, California 90032, USA
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522
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Liu HL, Peng Q, Wu YD, Chen D, Hou XL, Sabat M, Pu L. Highly Enantioselective Recognition of Structurally Diverse α-Hydroxycarboxylic Acids using a Fluorescent Sensor. Angew Chem Int Ed Engl 2009; 49:602-6. [DOI: 10.1002/anie.200904889] [Citation(s) in RCA: 109] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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523
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Chen J, Chan YH, Yang T, Wark SE, Son DH, Batteas JD. Spatially Selective Optical Tuning of Quantum Dot Thin Film Luminescence. J Am Chem Soc 2009; 131:18204-5. [DOI: 10.1021/ja906837s] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jixin Chen
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77842-3012
| | - Yang-Hsiang Chan
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77842-3012
| | - Tinglu Yang
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77842-3012
| | - Stacey E. Wark
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77842-3012
| | - Dong Hee Son
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77842-3012
| | - James D. Batteas
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77842-3012
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524
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Nie H, Liu S, Yu R, Jiang J. Phospholipid-Coated Carbon Nanotubes as Sensitive Electrochemical Labels with Controlled-Assembly-Mediated Signal Transduction for Magnetic Separation Immunoassay. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200903503] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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525
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Borisov SM, Nuss G, Klimant I. Red light-excitable oxygen sensing materials based on platinum(II) and palladium(II) benzoporphyrins. Anal Chem 2009; 80:9435-42. [PMID: 19006407 DOI: 10.1021/ac801521v] [Citation(s) in RCA: 116] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
New optical oxygen-sensing materials make use of highly luminescent NIR platinum(II) and palladium(II) complexes with benzoporphyrins. Bulk optodes based on polystyrene and sensing nanobeads based on poly(styrene-block-vinylpyrrolidone) and polysulfone are prepared and characterized. The versatility of the new materials is demonstrated. The features include excellent compatibility with most common excitation sources, high brightness, and suitability for subcutaneous oxygen monitoring.
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Affiliation(s)
- S M Borisov
- Institute of Analytical Chemistry and Radiochemistry, Graz University of Technology, Stremayrgasse 16, 8010 Graz, Austria.
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526
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Chatni MR, Li G, Porterfield DM. Frequency-domain fluorescence lifetime optrode system design and instrumentation without a concurrent reference light-emitting diode. APPLIED OPTICS 2009; 48:5528-5536. [PMID: 19823237 DOI: 10.1364/ao.48.005528] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We report the design, development, and implementation of an improved instrumentation approach for frequency-domain fluorescence lifetime (FDFL) optrodic sensing without a concurrent reference LED. FDFL traditionally uses a reference LED, at approximately the same wavelength as the sensor fluorophore emission, to measure phase shifts associated with changes in the fluorescence lifetime of fluorophore. For this work we used an oxygen optrode to design, develop, and test the reference-LED-free FDFL approach. Electronics and optics were optimized, and key system parameters, such as inherent system phase shifts, were determined to insure best performance. In our tests with the oxygen optrode, we observed that several key performance characteristics were improved by the implementation of the reference-LED-free instrumentation platform. This system can potentially be adapted to other analyte-selective fluorophores, which will enable scientists and researchers to expand the application of optrodic sensors as basic research tools in biology, medicine, and agriculture.
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Affiliation(s)
- Mohammad Rameez Chatni
- Physiological Sensing Facility--Bindley Bioscience Center, Purdue University, West Lafayette, Indiana 47906, USA
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527
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528
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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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529
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530
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Chatni MR, Porterfield DM. Self-referencing optrode technology for non-invasive real-time measurement of biophysical flux and physiological sensing. Analyst 2009; 134:2224-32. [PMID: 19838408 DOI: 10.1039/b903092a] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Vibrating probe technology has enabled scientific investigations that have expanded our knowledge of form and function in biology, but the emergence of new fields of cytomics and physiomics will require new technologies to probe the functional realm of living cells. In this paper, we present the development of a self-referencing optrode, which represents the next generation of biophysical flux sensors based on phase-sensitive detection for cell and tissue physiology. One key advantage is that optical approaches do not suffer from the inherent electrical artifacts which limit the performance of traditional vibrating, or self-referencing probe technology. In self-referencing modality, the optrode is oscillated (0.1 Hz) between two points a few microns apart in a concentration gradient, converting the optrodic oxygen concentration sensor into a dynamic flux sensor, based on Fick's law. Because of the inherent noise and drift filtering associated with phase-sensitive detection it is now possible to measure pico-molar flux levels using a micro-optrode. In this paper, we show the calibration, characterization and application of the self-referencing oxygen optrode for measuring biophysical oxygen flux.
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Affiliation(s)
- M R Chatni
- Bindley Bioscience Center-Physiological Sensing Facility, Purdue University, West Lafayette, IN 47906, USA
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531
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Zhang Y, Wang H, Nie J, Zhang Y, Shen G, Yu R. Individually addressable microelectrode arrays fabricated with gold-coated pencil graphite particles for multiplexed and high sensitive impedance immunoassays. Biosens Bioelectron 2009; 25:34-40. [DOI: 10.1016/j.bios.2009.06.011] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2009] [Revised: 06/01/2009] [Accepted: 06/02/2009] [Indexed: 10/20/2022]
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532
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Harriman A, Mallon LJ, Elliot KJ, Haefele A, Ulrich G, Ziessel R. Length Dependence for Intramolecular Energy Transfer in Three- and Four-Color Donor−Spacer−Acceptor Arrays. J Am Chem Soc 2009; 131:13375-86. [DOI: 10.1021/ja9038856] [Citation(s) in RCA: 130] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Anthony Harriman
- Molecular Photonics Laboratory, School of Chemistry, Bedson Building, Newcastle University, Newcastle upon Tyne, NE1 7RU, United Kingdom, and Laboratoire de Chimie Organique et Spectroscopies Avancées (LCOSA), Ecole Européenne de Chimie, Polymères et Matériaux, Université de Strasbourg, 25 rue Becquerel, 67087 Strasbourg Cedex 02, France
| | - Laura J. Mallon
- Molecular Photonics Laboratory, School of Chemistry, Bedson Building, Newcastle University, Newcastle upon Tyne, NE1 7RU, United Kingdom, and Laboratoire de Chimie Organique et Spectroscopies Avancées (LCOSA), Ecole Européenne de Chimie, Polymères et Matériaux, Université de Strasbourg, 25 rue Becquerel, 67087 Strasbourg Cedex 02, France
| | - Kristopher J. Elliot
- Molecular Photonics Laboratory, School of Chemistry, Bedson Building, Newcastle University, Newcastle upon Tyne, NE1 7RU, United Kingdom, and Laboratoire de Chimie Organique et Spectroscopies Avancées (LCOSA), Ecole Européenne de Chimie, Polymères et Matériaux, Université de Strasbourg, 25 rue Becquerel, 67087 Strasbourg Cedex 02, France
| | - Alexandre Haefele
- Molecular Photonics Laboratory, School of Chemistry, Bedson Building, Newcastle University, Newcastle upon Tyne, NE1 7RU, United Kingdom, and Laboratoire de Chimie Organique et Spectroscopies Avancées (LCOSA), Ecole Européenne de Chimie, Polymères et Matériaux, Université de Strasbourg, 25 rue Becquerel, 67087 Strasbourg Cedex 02, France
| | - Gilles Ulrich
- Molecular Photonics Laboratory, School of Chemistry, Bedson Building, Newcastle University, Newcastle upon Tyne, NE1 7RU, United Kingdom, and Laboratoire de Chimie Organique et Spectroscopies Avancées (LCOSA), Ecole Européenne de Chimie, Polymères et Matériaux, Université de Strasbourg, 25 rue Becquerel, 67087 Strasbourg Cedex 02, France
| | - Raymond Ziessel
- Molecular Photonics Laboratory, School of Chemistry, Bedson Building, Newcastle University, Newcastle upon Tyne, NE1 7RU, United Kingdom, and Laboratoire de Chimie Organique et Spectroscopies Avancées (LCOSA), Ecole Européenne de Chimie, Polymères et Matériaux, Université de Strasbourg, 25 rue Becquerel, 67087 Strasbourg Cedex 02, France
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533
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Do J, Huh J, Kim E. Solvatochromic fluorescence of piperazine-modified bipyridazines for an organic solvent-sensitive film. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:9405-9412. [PMID: 19601612 DOI: 10.1021/la901476q] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Bipyridazines were modified with heterocyclic amines such as piperazine to give symmetric quadrupolar (SPBP) and asymmetric dipolar (APBP) bipyridazine. The fluorescence of SPBP and APBP was highly sensitive to solvent polarity, giving a synthetic rainbow of emission in different organic solvents. The solvent-induced changes in the Stokes shift of the bipyridazines resulted in positive solvatochromism. The symmetric bipyridazine showed higher solvatochromic sensitivity than that of the asymmetric bipyridazine and diazines. The positive solvatochromic fluorescence properties were reproduced in a binary system of toluene/dimethyl sulfoxide (DMSO) mixture, which showed a synthetic rainbow of emission by varying the DMSO content in toluene. An organic sensitive poly(methyl methacrylate) film containing SPBP exhibited a visible sensitivity for the detection of solvents by their polarity upon exposure to organic solvent molecules.
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Affiliation(s)
- Jaekwon Do
- Department of Chemical and Biomolecular Engineering, Yonsei University, 262 Seongsanno, Seodaemun-gu, Seoul 120-749, Korea
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534
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Odaci D, Gacal BN, Gacal B, Timur S, Yagci Y. Fluorescence Sensing of Glucose Using Glucose Oxidase Modified by PVA-Pyrene Prepared via “Click” Chemistry. Biomacromolecules 2009; 10:2928-34. [DOI: 10.1021/bm900755y] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Dilek Odaci
- Biochemistry Department, Faculty of Science, Ege University, Bornova, 35100 Izmir, Turkey, and Chemistry Department, Faculty of Science and Letters, Istanbul Technical University, Maslak, TR-34469, Istanbul, Turkey
| | - Bahadir N. Gacal
- Biochemistry Department, Faculty of Science, Ege University, Bornova, 35100 Izmir, Turkey, and Chemistry Department, Faculty of Science and Letters, Istanbul Technical University, Maslak, TR-34469, Istanbul, Turkey
| | - Burcin Gacal
- Biochemistry Department, Faculty of Science, Ege University, Bornova, 35100 Izmir, Turkey, and Chemistry Department, Faculty of Science and Letters, Istanbul Technical University, Maslak, TR-34469, Istanbul, Turkey
| | - Suna Timur
- Biochemistry Department, Faculty of Science, Ege University, Bornova, 35100 Izmir, Turkey, and Chemistry Department, Faculty of Science and Letters, Istanbul Technical University, Maslak, TR-34469, Istanbul, Turkey
| | - Yusuf Yagci
- Biochemistry Department, Faculty of Science, Ege University, Bornova, 35100 Izmir, Turkey, and Chemistry Department, Faculty of Science and Letters, Istanbul Technical University, Maslak, TR-34469, Istanbul, Turkey
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535
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Immunosensors for detection of Annexin II and MUC5AC for early diagnosis of lung cancer. Biosens Bioelectron 2009; 25:456-62. [PMID: 19717294 DOI: 10.1016/j.bios.2009.08.007] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2009] [Revised: 08/03/2009] [Accepted: 08/03/2009] [Indexed: 11/20/2022]
Abstract
Amperometric immunosensors were developed to diagnose lung cancer through the detection of Annexin II and MUC5AC. To fabricate the sensor probe, a conducting polymer (poly-terthiophene carboxylic acid; poly-TTCA) was electropolymerized onto a gold nanoparticle/glassy carbon electrode (AuNP/GCE) and a dendrimer (Den) was covalently bonded to the poly-TTCA through amide bond formation, where AuNPs were doped onto the dendrimer. To obtain the final sensor probe, an antibody (anti-Annexin II) and hydrazine (Hyd), which is a catalyst for the reduction of H(2)O(2) generated by glucose oxidase (GOx), were covalently attached onto the Den/AuNP-modified surface. Each surface was then characterized by SEM, impedance spectroscopy and XPS. The final sensor probe was examined before and after interaction with Annexin II and MUC5AC using impedance-spectroscopic, quartz crystal microbalance and amperometric methods. The performance of the immunosensor for the Annexin II was evaluated for the apical surface fluid labeled with GOx by the standard addition method. In this case, the detection limit of the proposed method was 0.051 ng/mL (k=3, n=5). The Annexin II concentration in the secretions collected from squamous metaplastic cells was determined to be 280+/-8.0 pg/mL (n=5).
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536
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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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537
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Pu KY, Cai L, Liu B. Design and Synthesis of Charge-Transfer-Based Conjugated Polyelectrolytes as Multicolor Light-Up Probes. Macromolecules 2009. [DOI: 10.1021/ma9010389] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Kan-Yi Pu
- Department of Chemical and Biomolecular Engineering, 4 Engineering Drive 4, National University of Singapore, Singapore 117576
| | - Liping Cai
- Department of Chemical and Biomolecular Engineering, 4 Engineering Drive 4, National University of Singapore, Singapore 117576
| | - Bin Liu
- Department of Chemical and Biomolecular Engineering, 4 Engineering Drive 4, National University of Singapore, Singapore 117576
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538
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Manocchi AK, Domachuk P, Omenetto FG, Yi H. Facile fabrication of gelatin-based biopolymeric optical waveguides. Biotechnol Bioeng 2009; 103:725-32. [DOI: 10.1002/bit.22306] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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539
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Wang XD, Chen HX, Zhou TY, Lin ZJ, Zeng JB, Xie ZX, Chen X, Wong KY, Chen GN, Wang XR. Optical colorimetric sensor strip for direct readout glucose measurement. Biosens Bioelectron 2009; 24:3702-5. [PMID: 19523808 DOI: 10.1016/j.bios.2009.05.018] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2009] [Revised: 05/04/2009] [Accepted: 05/13/2009] [Indexed: 11/18/2022]
Abstract
A novel direct readout colorimetric optical glucose sensor strip was constructed based on a three-layer film, including a green-emitted CdTe/CdS quantum dots (QDs) layer as a stable color background, a red-fluorescent platinum-porphyrin oxygen-sensing layer and a glucose oxidase layer. The sensor achieved high resolution (up to 0.2 mmol L(-1)) glucose determination with a detection range from 0 to 3.0 mmol L(-1). A "glucose ruler" which acts as a glucose standard colorimetric card was obtained. Glucose concentration could easily be directly readout using the "glucose ruler", which made the glucose determination rapid, convenient and easy. The effects of pH, salinity and temperature were systematically investigated. The prepared sensor was finally applied for glucose sample analysis, compared with the "glucose ruler", accurate results could be directly readout.
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Affiliation(s)
- Xu-dong Wang
- The Key Laboratory of Analytical Sciences of the Ministry of Education, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
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540
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Molecular structure of paramagnetic bis-diisobutyl dithiophosphinate complexes of lanthanides(III) with 1,10-phenanthroline in solution by the data of NMR relaxation spectroscopy. J STRUCT CHEM+ 2009. [DOI: 10.1007/s10947-009-0048-5] [Citation(s) in RCA: 1] [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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541
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Burguete MI, Fabregat V, Galindo F, Izquierdo MA, Luis SV. Improved polyHEMA–DAQ films for the optical analysis of nitrite. Eur Polym J 2009. [DOI: 10.1016/j.eurpolymj.2009.01.028] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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542
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de Freitas Paulo T, de Oliveira Pinheiro S, Da Silva M, de França Lopes L, Pinheiro L, Aquino G, Temperini M, de Lima Neto P, Diógenes I. Thionicotinamide SAM on Gold: Adsorption Studies and Electroactivity. ELECTROANAL 2009. [DOI: 10.1002/elan.200804503] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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543
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Shang L, Dong S. Design of fluorescent assays for cyanide and hydrogen peroxide based on the inner filter effect of metal nanoparticles. Anal Chem 2009; 81:1465-70. [PMID: 19140677 DOI: 10.1021/ac802281x] [Citation(s) in RCA: 212] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We have demonstrated the design of a new type fluorescent assay based on the inner filter effect (IFE) of metal nanoparticles (NPs), which is conceptually different from the previously reported metal NPs-based fluorescent assays. With a high extinction coefficient and tunable plasmon absorption feature, metal NPs are expected to be capable of functioning as a powerful absorber to tune the emission of the fluorophore in the IFE-based fluorescent assays. In this work, we presented two proof-of-concept examples based on the IFE of Au NPs by choosing MDMO-PPV as a model fluorophore, whose fluorescence could be tuned by the absorbance of Au NPs with a much higher sensitivity than the corresponding absorbance approach. While the first assay worked in a turn-on mode upon the etching of Au NPs by the analyte, CN(-), the second one functioned in a turn-off mode upon the catalytic growth of Au NPs by the analyte, H(2)O(2). As a result, the present IFE-based approach can detect cyanide ranging from 1.0 x 10(-6) to 6.0 x 10(-4) M with a detection limit of 6.0 x 10(-7) M and H(2)O(2) ranging from 1.5 x 10(-7) to 2.2 x 10(-5) M with a detection limit of 8.5 x 10(-8) M, respectively. Notably, the present IFE-based approach allows the design of fluorescent assays in a more simple, time-saving, and economical approach when compared with conventional metal NPs-based fluorescent assays, since no modification step of the fluorophore was needed any more.
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Affiliation(s)
- Li Shang
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Graduate School of the Chinese Academy of Sciences, Changchun, 130022, China
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544
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Chemiluminescence flow biosensor for hydrogen peroxide using DNAzyme immobilized on eggshell membrane as a thermally stable biocatalyst. Biosens Bioelectron 2009; 24:2534-40. [DOI: 10.1016/j.bios.2009.01.010] [Citation(s) in RCA: 94] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2008] [Revised: 12/30/2008] [Accepted: 01/05/2009] [Indexed: 11/17/2022]
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545
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Griffin J, Singh AK, Senapati D, Lee E, Gaylor K, Jones-Boone J, Ray PC. Sequence-specific HCV RNA quantification using the size-dependent nonlinear optical properties of gold nanoparticles. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2009; 5:839-45. [PMID: 19219836 DOI: 10.1002/smll.200801334] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
The hepatitis C virus (HCV) is a single-stranded (ss) RNA virus that is responsible for chronic liver diseases, such as cirrhosis, end-stage liver disease, and hepatocellular carcinoma. Driven by the need to detect the presence of the HCV viral sequence, herein it is demonstrated for the first time that the nonlinear optical (NLO) properties of gold nanoparticles can be used for screening and quantifying HCV RNA without any modification, with excellent detection limit (80 pM) and selectivity (single base-pair mismatch). The hyper-Rayleigh scattering (HRS) intensity increases 25 times when label-free, 145-mer, HCV ss-RNA is hybridized with 400 pM target RNA. The mechanism of HRS intensity change is discussed with experimental evidence for a higher multipolar contribution to the NLO response of gold nanoparticles.
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Affiliation(s)
- Jelani Griffin
- Department of Chemistry, Jackson State University, Jackson, MS 39217, USA
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546
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Bio-inspired colorimetric detection of Hg2+ and Pb2+ heavy metal ions using Au nanoparticles. Anal Bioanal Chem 2009; 394:33-46. [DOI: 10.1007/s00216-008-2594-7] [Citation(s) in RCA: 183] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2008] [Revised: 12/18/2008] [Accepted: 12/19/2008] [Indexed: 12/26/2022]
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547
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HENARES TG, MAEKAWA E, OKUBO F, MIZUTANI F, YAO T, SEKIZAWA R, HISAMOTO H. Enzyme-Release Capillary as a Facile Enzymatic Biosensing Part for a Capillary-Assembled Microchip. ANAL SCI 2009; 25:1025-8. [DOI: 10.2116/analsci.25.1025] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Terence G. HENARES
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University
| | - Eiji MAEKAWA
- Graduate School of Material Science, University of Hyogo
| | - Fumito OKUBO
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University
| | - Fumio MIZUTANI
- Graduate School of Material Science, University of Hyogo
| | - Toshio YAO
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University
| | | | - Hideaki HISAMOTO
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University
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548
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Rundel PW, Graham EA, Allen MF, Fisher JC, Harmon TC. Environmental sensor networks in ecological research. THE NEW PHYTOLOGIST 2009; 182:589-607. [PMID: 19422546 DOI: 10.1111/j.1469-8137.2009.02811.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Environmental sensor networks offer a powerful combination of distributed sensing capacity, real-time data visualization and analysis, and integration with adjacent networks and remote sensing data streams. These advances have become a reality as a combined result of the continuing miniaturization of electronics, the availability of large data storage and computational capacity, and the pervasive connectivity of the Internet. Environmental sensor networks have been established and large new networks are planned for monitoring multiple habitats at many different scales. Projects range in spatial scale from continental systems designed to measure global change and environmental stability to those involved with the monitoring of only a few meters of forest edge in fragmented landscapes. Temporal measurements have ranged from the evaluation of sunfleck dynamics at scales of seconds, to daily CO2 fluxes, to decadal shifts in temperatures. Above-ground sensor systems are partnered with subsurface soil measurement networks for physical and biological activity, together with aquatic and riparian sensor networks to measure groundwater fluxes and nutrient dynamics. More recently, complex sensors, such as networked digital cameras and microphones, as well as newly emerging sensors, are being integrated into sensor networks for hierarchical methods of sensing that promise a further understanding of our ecological systems by revealing previously unobservable phenomena.
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Affiliation(s)
- Philip W Rundel
- Center for Embedded Networked Sensing, University of California, Los Angeles, CA 90095, USA
- Department of Ecology and Evolutionary Biology, University of California, Los Angeles, CA 90095, USA
| | - Eric A Graham
- Center for Embedded Networked Sensing, University of California, Los Angeles, CA 90095, USA
| | - Michael F Allen
- Center for Conservation Biology and Department of Plant Pathology and Microbiology, University of California, Riverside, CA 92521, USA
| | - Jason C Fisher
- School of Engineering, University of California, Merced, CA 95344, USA
| | - Thomas C Harmon
- School of Engineering, University of California, Merced, CA 95344, USA
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549
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Borisov S, Nuss G, Haas W, Saf R, Schmuck M, Klimant I. New NIR-emitting complexes of platinum(II) and palladium(II) with fluorinated benzoporphyrins. J Photochem Photobiol A Chem 2009. [DOI: 10.1016/j.jphotochem.2008.10.003] [Citation(s) in RCA: 102] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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550
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Ray PC, Yu H, Fu PP. Toxicity and environmental risks of nanomaterials: challenges and future needs. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART C, ENVIRONMENTAL CARCINOGENESIS & ECOTOXICOLOGY REVIEWS 2009; 27:1-35. [PMID: 19204862 PMCID: PMC2844666 DOI: 10.1080/10590500802708267] [Citation(s) in RCA: 310] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Nanotechnology has gained a great deal of public interest because of the needs and applications of nanomaterials in many areas of human endeavors including industry, agriculture, business, medicine, and public health. Environmental exposure to nanomaterials is inevitable as nanomaterials become part of our daily life, and, as a result, nanotoxicity research is gaining attention. This review presents a summary of recent research efforts on fate, behavior, and toxicity of different classes of nanomaterials in the environment. A critical evaluation of challenges and future needs for the safe environmental nanotechnology are discussed.
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Affiliation(s)
- Paresh Chandra Ray
- Department of Chemistry, Jackson State University, Jackson, Mississippi 39217, USA.
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