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Detection of chlorinated organic pollutants with an integrated screen-printed electrochemical sensor based on a carbon nanocomposite derived from bread waste. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.141459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Duan W, Fernández-Sánchez C, Gich M. Upcycling Bread Waste into a Ag-Doped Carbon Material Applied to the Detection of Halogenated Compounds in Waters. ACS APPLIED MATERIALS & INTERFACES 2022; 14:40182-40190. [PMID: 35998366 PMCID: PMC9460431 DOI: 10.1021/acsami.2c08332] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Bread waste is a major part of food wastage which could be upcycled to produce functional materials, following the principles of the circular bioeconomy. This work shows that bread waste can be recycled and valorized to produce a composite conductive material with excellent properties for chemical sensor applications. Here, dry bread is impregnated with an aqueous solution of a silver precursor and pyrolyzed to produce a porous carbon matrix containing Ag nanoparticles with diameters ranging from 20 to 40 nm. These particles perform as catalytic redox centers for the electrochemical detection of halide ions (Cl-, Br-, and I-) and organohalide target molecules such as sucralose and trichloroacetic acid. A thorough analytical characterization is carried out to show the potential application of the developed material for the manufacturing of electrochemical sensor approaches. The material preparation is sustainable, low-cost, simple, and upscalable. These are ideal features for the large-scale manufacturing by screen-printing technologies of single-use electrochemical sensors for the rapid analysis of halogenated organic pollutants in waters.
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Affiliation(s)
- Wenchao Duan
- Institut
de Ciència de Materials de Barcelona, ICMAB (CSIC), Campus UAB, 08193 Bellaterra, Spain
- Institut
de Microelectrònica de Barcelona, IMB-CNM (CSIC), Campus UAB, 08193 Bellaterra, Spain
| | - César Fernández-Sánchez
- Institut
de Microelectrònica de Barcelona, IMB-CNM (CSIC), Campus UAB, 08193 Bellaterra, Spain
- CIBER
de Bioingeniería, Biomateriales y
Nanomedicina (CIBER-BBN), Jordi Girona 18-26, 08034 Barcelona, Spain
| | - Martí Gich
- Institut
de Ciència de Materials de Barcelona, ICMAB (CSIC), Campus UAB, 08193 Bellaterra, Spain
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Dutta R, Ghosh M, Pyne A, Sarkar N. Insight into the Dynamics of Different Fluorophores in the Interior of Aerosol OT Lamellar Structures in the Presence of Sugars: From Picosecond-to-Femtosecond Study. J Phys Chem B 2018; 123:117-129. [DOI: 10.1021/acs.jpcb.8b10609] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Rupam Dutta
- Department of Chemistry, Indian Institute of Technology, Kharagpur 721302, WB, India
| | - Meghna Ghosh
- Department of Chemistry, Indian Institute of Technology, Kharagpur 721302, WB, India
| | - Arghajit Pyne
- Department of Chemistry, Indian Institute of Technology, Kharagpur 721302, WB, India
| | - Nilmoni Sarkar
- Department of Chemistry, Indian Institute of Technology, Kharagpur 721302, WB, India
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Nikoleli GP, Nikolelis DP, Siontorou CG, Nikolelis MT, Karapetis S. The Application of Lipid Membranes in Biosensing. MEMBRANES 2018; 8:E108. [PMID: 30441848 PMCID: PMC6316677 DOI: 10.3390/membranes8040108] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Revised: 11/01/2018] [Accepted: 11/12/2018] [Indexed: 12/20/2022]
Abstract
The exploitation of lipid membranes in biosensors has provided the ability to reconstitute a considerable part of their functionality to detect trace of food toxicants and environmental pollutants. This paper reviews recent progress in biosensor technologies based on lipid membranes suitable for food quality monitoring and environmental applications. Numerous biosensing applications based on lipid membrane biosensors are presented, putting emphasis on novel systems, new sensing techniques, and nanotechnology-based transduction schemes. The range of analytes that can be currently using these lipid film devices that can be detected include, insecticides, pesticides, herbicides, metals, toxins, antibiotics, microorganisms, hormones, dioxins, etc. Technology limitations and future prospects are discussed, focused on the evaluation/validation and eventually commercialization of the proposed lipid membrane-based biosensors.
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Affiliation(s)
- Georgia-Paraskevi Nikoleli
- Laboratory of Inorganic & Analytical Chemistry, School of Chemical Engineering, Dept 1, Chemical Sciences, National Technical University of Athens, 9 Iroon Polytechniou St., 15780 Athens, Greece.
| | - Dimitrios P Nikolelis
- Laboratory of Environmental Chemistry, Department of Chemistry, University of Athens, Panepistimiopolis-Kouponia, 15771 Athens, Greece.
| | - Christina G Siontorou
- Laboratory of Simulation of Industrial Processes, Department of Industrial Management and Technology, School of Maritime and Industry, University of Piraeus, 18534 Pireus, Greece.
| | - Marianna-Thalia Nikolelis
- Laboratory of Environmental Chemistry, Department of Chemistry, University of Athens, Panepistimiopolis-Kouponia, 15771 Athens, Greece.
| | - Stephanos Karapetis
- Laboratory of Inorganic & Analytical Chemistry, School of Chemical Engineering, Dept 1, Chemical Sciences, National Technical University of Athens, 9 Iroon Polytechniou St., 15780 Athens, Greece.
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Barker M, Kennedy A. Disruption of gel phase lipid packing efficiency by sucralose studied with merocyanine 540. Colloids Surf B Biointerfaces 2017; 152:214-219. [DOI: 10.1016/j.colsurfb.2017.01.026] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Revised: 12/23/2016] [Accepted: 01/14/2017] [Indexed: 11/30/2022]
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Zhang X, Tanner P, Graff A, Palivan CG, Meier W. Mimicking the cell membrane with block copolymer membranes. ACTA ACUST UNITED AC 2012. [DOI: 10.1002/pola.26000] [Citation(s) in RCA: 104] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Shirsat M, Too C, Wallace G. Amperometric Glucose Biosensor on Layer by Layer Assembled Carbon Nanotube and Polypyrrole Multilayer Film. ELECTROANAL 2008. [DOI: 10.1002/elan.200704028] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Zhang YL, Dunlop J, Phung T, Ottova A, Tien HT. Supported bilayer lipid membranes modified with a phosphate ionophore. Biosens Bioelectron 2006; 21:2311-4. [PMID: 16325385 DOI: 10.1016/j.bios.2005.10.023] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2005] [Revised: 10/25/2005] [Accepted: 10/31/2005] [Indexed: 10/25/2022]
Abstract
This article reports the electrical responses of a phosphate ionophore, the cyclic polyamine 3-decyl-1,5,8-triazacyclodecane-2,4-dione (N3-cyclic amine) incorporated into metal supported bilayer lipid membranes (s-BLM). Teflon coated silver wire was used as a support. In a potentiometric mode, the ionophore had a response that was linearly related to the logarithm of HPO4(2-) concentration and was also dependant on pH. Selectivity coefficients for other anions compared to HPO4(2-) ions, determined by the separate solution method, fell within the range 1.73 x 10(-4) to 6.38 x 10(-2).
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Affiliation(s)
- Yan Li Zhang
- AgResearch, Grasslands Research Centre, Tennent Drive, Private Bag 11008, Palmerston North, New Zealand.
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Gruhn T, Lipowsky R. Temperature dependence of vesicle adhesion. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2005; 71:011903. [PMID: 15697626 DOI: 10.1103/physreve.71.011903] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2004] [Indexed: 05/24/2023]
Abstract
The influence of thermal fluctuations on the adhesion behavior of fluid vesicles is investigated with the help of Monte Carlo simulations. The adhesion area A(ad) of a fluid vesicle adhering to a smooth attractive substrate is studied systematically for different values of temperature, adhesion strength, and potential range. For low temperatures T , the ratio A(ad) /A between the adhesion area and the total area A of the vesicle is a linear function of T/kappa , where kappa is the bending rigidity. Linear fits of the simulation data allow an extrapolation to T=0 which corresponds well with data obtained from a simplified analytic model. A new ansatz for A(ad) (T) which is based on the eigenmodes of the adhering vesicle explains the linear behavior of A(ad) (T) for low T and helps to define a fit function which reproduces the linear behavior of the obtained simulation data. This fit function may be used in order to determine the bending rigidity and the adhesion strength from the observed adhesion geometry.
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Affiliation(s)
- Thomas Gruhn
- Max-Planck-Institut für Kolloid- und Grenzflächenforschung, 14424 Potsdam, Germany
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Sung WJ, Bae YH. A glucose oxidase electrode based on polypyrrole with polyanion/PEG/enzyme conjugate dopant. Biosens Bioelectron 2003; 18:1231-9. [PMID: 12835041 DOI: 10.1016/s0956-5663(03)00091-5] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
This study investigated a new glucose sensor prepared by electrochemical polymerization of pyrrole with polyanion/poly(ethylene glycol) (PEG)/glucose oxidase (GOD) conjugate dopants. GOD was coupled to a strong polyanion, poly(2-acrylamido-2-methylpropane sulfonic acid) (AMPS) via PEG spacer to effectively and reproducibly immobilize GOD within a polypyrrole matrix onto a Pt electrode surface. PEGs with four different chain lengths (1000, 2000, 3000, and 4000) were used as spacers to study the spacer length effect on enzyme immobilization and electrode function. After conjugation, more than 90% of the GOD bioactivity was preserved and the bioactivity of the conjugated GOD increased with longer PEG spacers. The resulting polyanion/PEG/GOD conjugate was used as a dopant for electropolymerizing pyrrole. The activity of the immobilized enzyme on the electrode ranged from 119 to 209 mU cm(-2) and the bioactivity increased with the use of longer PEG spacers. The amperometric response of the enzyme electrode was linear up to 20 mM glucose concentration with a sensitivity ranging from 180 to 270 nA mM(-1) cm(-2). The kinetic parameters Michaelis-Menten constant (K(M)(app)) and maximum current density (j(max)) depended on the amount of active enzyme, level of substrate diffusion, and PEG spacer length. An increase in the electrical charge passed during polymerization (thus, increasing polypyrrole thickness) to 255 mC cm(-2) increased the sensitivity of the enzyme electrode because of the greater amount of incorporated enzyme. However, although the amount of incorporated GOD continued to increase when the charge increased above 255 mC cm(-2), the sensitivity began to decline gradually. The condition for preparing the enzyme electrode was optimized at 800 mV potential with a dopant concentration of 1 mg ml(-1).
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Affiliation(s)
- Won Jun Sung
- Department of Materials Science and Engineering, Center for Biomaterials and Biotechnology, Kwangju Institute of Science and Technology, 1 Oryong-dong, Puk-gu, Kwangju 500-712, South Korea
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Abstract
Phospholipid vesicles are well-studied biomembrane mimics that are of increasing interest in drug delivery, immunoassays, and sensor chips. In a number of biosensor applications it is desirable to be able to adhere vesicles to a surface in a manner which does not result in their rupture or fusion. Such behavior should, in principle, be achievable by controlling the vesicle-surface and vesicle-vesicle interactions. We have varied vesicle composition and charge (phosphatidylcholine, phosphatidylcholine-phosphatidic acid 18 mol%) and solution ionic strength, to study the adhesion of fluorescent vesicles to glass, gold, and gold modified with chemisorbed acetyl-cysteine. The extent of chemisorption was characterized with angle-resolved X-ray photoelectron spectroscopy (ARXPS), and vesicle integrity and behavior was studied using entrapped and lipophilic fluorescent markers, together and in separate measurements. Vesicle fusion (by energy transfer), adhesion of intact vesicles (with entrapped calcein) and diffusion coefficients (by photobleaching recovery) were monitored using confocal fluorescence microscopy. Acetyl-cysteine modified gold surfaces were shown to be appropriate substrates for adhesion of intact vesicles. Finally, as a 'proof of principle' for fluorescence amplification, release of a self-quenching entrapped reporter dye (calcein) by the detergent Triton X-100 was followed in real time.
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Affiliation(s)
- Stavroula Sofou
- Department of Chemical Engineering and Applied Chemistry, Columbia University, 500 West 120th Street, # 4721, New York, NY 10027, USA
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Current awareness in flavour and fragrance. FLAVOUR FRAG J 2001. [DOI: 10.1002/ffj.960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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