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Erich Sackmann - One of the best experts on this subject based on the ideXlab platform.
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A Novel Membrane Charge Sensor: Sensitive Detection of Surface Charge at Polymer/Lipid Composite Films on Indium Tin Oxide Electrodes
Journal of Physical Chemistry B, 2020Co-Authors: Heiko Hillebrandt, Motomu Tanaka, Erich SackmannAbstract:We report the design of a Novel Membrane charge sensor by the deposition of highly insulating polymer/lipid composite films on indium tin oxide (ITO) semiconductor electrodes. The lipid monolayers ...
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A Novel Membrane Charge Sensor: Sensitive Detection of Surface Charge at Polymer/Lipid Composite Films on Indium Tin Oxide Electrodes
The Journal of Physical Chemistry B, 2002Co-Authors: Heiko Hillebrandt, Motomu Tanaka, Erich SackmannAbstract:We report the design of a Novel Membrane charge sensor by the deposition of highly insulating polymer/lipid composite films on indium tin oxide (ITO) semiconductor electrodes. The lipid monolayers were deposited on soft Langmuir-Blodgett (LB) multilayers of cellulose derivatives (‘hairy-rod’ polymers) by continuous exchange of solvent. The optical transparency of ITO enables the parallel characterization of the polymer- supported lipid monolayers by electrochemical impedance spectroscopy and fluorescence microscopy. The polymer/lipid composite system yielded an electric resistance of 2.5 × 106 Ω cm2 and a lateral diffusion constant for the lipids of 0.1 µm2/s. Such highly insulating and fluid composite films on ITO semiconductor electrodes can be utilized as Membrane charge sensors to detect changes in surface charge by treating this electrolyte/(organic) insulator/semiconductor (EIS) system as an analogue of the metal/oxide/semiconductor (MOS) system. For this purpose, we incorporated 10 mol%of lipids with a chelator headgroup (nitrilotriacetic acid, NTA) to switch the Membrane charge. A difference in surface charge density of ∆Q ) 2.2 × 10-6 C/cm2 changed the flat band potential of the EIS system by nearly 50%. This result suggests that the sensitivity limit for our setup is sufficient to detect the binding of charged proteins to a Membrane surface.
Heiko Hillebrandt - One of the best experts on this subject based on the ideXlab platform.
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A Novel Membrane Charge Sensor: Sensitive Detection of Surface Charge at Polymer/Lipid Composite Films on Indium Tin Oxide Electrodes
Journal of Physical Chemistry B, 2020Co-Authors: Heiko Hillebrandt, Motomu Tanaka, Erich SackmannAbstract:We report the design of a Novel Membrane charge sensor by the deposition of highly insulating polymer/lipid composite films on indium tin oxide (ITO) semiconductor electrodes. The lipid monolayers ...
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A Novel Membrane Charge Sensor: Sensitive Detection of Surface Charge at Polymer/Lipid Composite Films on Indium Tin Oxide Electrodes
The Journal of Physical Chemistry B, 2002Co-Authors: Heiko Hillebrandt, Motomu Tanaka, Erich SackmannAbstract:We report the design of a Novel Membrane charge sensor by the deposition of highly insulating polymer/lipid composite films on indium tin oxide (ITO) semiconductor electrodes. The lipid monolayers were deposited on soft Langmuir-Blodgett (LB) multilayers of cellulose derivatives (‘hairy-rod’ polymers) by continuous exchange of solvent. The optical transparency of ITO enables the parallel characterization of the polymer- supported lipid monolayers by electrochemical impedance spectroscopy and fluorescence microscopy. The polymer/lipid composite system yielded an electric resistance of 2.5 × 106 Ω cm2 and a lateral diffusion constant for the lipids of 0.1 µm2/s. Such highly insulating and fluid composite films on ITO semiconductor electrodes can be utilized as Membrane charge sensors to detect changes in surface charge by treating this electrolyte/(organic) insulator/semiconductor (EIS) system as an analogue of the metal/oxide/semiconductor (MOS) system. For this purpose, we incorporated 10 mol%of lipids with a chelator headgroup (nitrilotriacetic acid, NTA) to switch the Membrane charge. A difference in surface charge density of ∆Q ) 2.2 × 10-6 C/cm2 changed the flat band potential of the EIS system by nearly 50%. This result suggests that the sensitivity limit for our setup is sufficient to detect the binding of charged proteins to a Membrane surface.
Motomu Tanaka - One of the best experts on this subject based on the ideXlab platform.
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A Novel Membrane Charge Sensor: Sensitive Detection of Surface Charge at Polymer/Lipid Composite Films on Indium Tin Oxide Electrodes
Journal of Physical Chemistry B, 2020Co-Authors: Heiko Hillebrandt, Motomu Tanaka, Erich SackmannAbstract:We report the design of a Novel Membrane charge sensor by the deposition of highly insulating polymer/lipid composite films on indium tin oxide (ITO) semiconductor electrodes. The lipid monolayers ...
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A Novel Membrane Charge Sensor: Sensitive Detection of Surface Charge at Polymer/Lipid Composite Films on Indium Tin Oxide Electrodes
The Journal of Physical Chemistry B, 2002Co-Authors: Heiko Hillebrandt, Motomu Tanaka, Erich SackmannAbstract:We report the design of a Novel Membrane charge sensor by the deposition of highly insulating polymer/lipid composite films on indium tin oxide (ITO) semiconductor electrodes. The lipid monolayers were deposited on soft Langmuir-Blodgett (LB) multilayers of cellulose derivatives (‘hairy-rod’ polymers) by continuous exchange of solvent. The optical transparency of ITO enables the parallel characterization of the polymer- supported lipid monolayers by electrochemical impedance spectroscopy and fluorescence microscopy. The polymer/lipid composite system yielded an electric resistance of 2.5 × 106 Ω cm2 and a lateral diffusion constant for the lipids of 0.1 µm2/s. Such highly insulating and fluid composite films on ITO semiconductor electrodes can be utilized as Membrane charge sensors to detect changes in surface charge by treating this electrolyte/(organic) insulator/semiconductor (EIS) system as an analogue of the metal/oxide/semiconductor (MOS) system. For this purpose, we incorporated 10 mol%of lipids with a chelator headgroup (nitrilotriacetic acid, NTA) to switch the Membrane charge. A difference in surface charge density of ∆Q ) 2.2 × 10-6 C/cm2 changed the flat band potential of the EIS system by nearly 50%. This result suggests that the sensitivity limit for our setup is sufficient to detect the binding of charged proteins to a Membrane surface.
Xiaoying Zhu - One of the best experts on this subject based on the ideXlab platform.
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a Novel Membrane showing both hydrophilic and oleophobic surface properties and its non fouling performances for potential water treatment applications
Journal of Membrane Science, 2013Co-Authors: Xiaoying Zhu, Hongen Loo, Renbi BaiAbstract:Abstract Membrane organic and biological fouling has been one of the major problems for Membrane technology applications in water and wastewater treatment. In this study, a Novel Membrane showing both hydrophilic and oleophobic surface properties was developed and evaluated for its resistance against organic and biological fouling. The Membranes in flat sheet configuration were prepared from PVDF as the base matrix polymer, blended with an additive polymer that was synthesized to contain both hydrophilic and oleophobic segments. The prepared Novel Membranes displayed high affinity to water but low affinity to oil. Experimental results from the filtration of protein solution, humic acid solution and oil/water emulsion confirmed that the developed Membranes had greatly enhanced water flux and reduced organic fouling performance (shown as slow flux decay and high flux recovery after Membrane cleaning). In the biofouling tests with the developed Membranes being immersed in bacteria suspension or used for the filtration of bacteria suspension, it was found that the Novel Membranes effectively prevented bacteria adhesion on the Membrane and the flux decay incurred during the filtration can be fully recovered after a simple cleaning with water under the experimental conditions. This study also demonstrated that a Membrane surface showing both hydrophilic and oleophobic surface properties provided an effective and better way to reduce the effect of Membrane fouling by organic as well as biological foulants than a Membrane surface showing the hydrophilic property only. The developed Membrane has a great potential for water and wastewater treatment applications.
Jirachote Phattaranawik - One of the best experts on this subject based on the ideXlab platform.
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Novel Membrane-based sensor for online Membrane integrity monitoring
Journal of Membrane Science, 2008Co-Authors: Jirachote Phattaranawik, Anthony Gordon Fane, F.-s. WongAbstract:A Novel Membrane-based sensor device for upstream Membrane integrity monitoring has been developed and evaluated in this study. The sensor is based on relative trans-Membrane pressures created by two Membranes in series inside the sensor device that detects deposition from the sample stream onto the first of the sensor Membranes. The sensor pressure signals can distinguish between intact or damaged Membranes in the upstream Membrane filtration process. Studies were conducted to evaluate both stabilities and sensitivities of the relative trans-Membrane pressure monitoring technique. Sensitivity, based on the response times of the Membrane sensor for particle detection, was determined for a range of operating conditions, Membrane sandwich configurations, and particle concentrations in both simulated Membrane failures and for actual pin-hole defects on a submerged MF Membrane. The results showed that both sensitivities and stability strongly depended on Membrane sandwich configurations (Membrane characteristics) in the sensor, and mode of operation (pressurized or vacuum). The Membrane sensor detected bentonite particles with a concentration of 0.3 mg/L (turbidity ∼0.3 NTU) in approximately 35 min in the vacuum mode. The sensor is reliable, sensitive and low cost. It has potential applications in decentralized systems or in multichannel monitoring of local conditions in a large plant. Possible applications of the Membrane sensor for fouling monitoring are also discussed.
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a Novel Membrane bioreactor based on Membrane distillation
Desalination, 2008Co-Authors: Jirachote Phattaranawik, A G Fane, Audrey C S Pasquier, Wu BingAbstract:This paper describes a Novel wastewater treatment process known as the Membrane distillation bioreactor (MDBR). The MDBR process integrates a wastewater bioreactor, such as activated sludge, with Membrane distillation (MD). The ability of MD to transfer only volatiles means that very high quality treated water is obtainable, with TOC levels below 1 ppm and negligible salts. A unique feature is that the MDBR allows for the organic retention times to be much greater than the hydraulic retention time. The MDBR uses thermophilic bacteria at about 50°C to treat wastewater. Stable fluxes in the range 2–5 L/m2 h have been sustained over extended periods. A typical experiment is described using a submerged Membrane module. The MDBR has the potential to achieve in one step the reclamation obtained by the combined MBR + RO process. For viable operation it would be necessary to use low grade (waste) heat and water cooling. The potential benefits and applications of the MDBR are discussed.
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Novel Membrane-based sensor for online Membrane integrity monitoring
Journal of Membrane Science, 2008Co-Authors: Jirachote Phattaranawik, Anthony Gordon Fane, F.-s. WongAbstract:A Novel Membrane-based sensor device for upstream Membrane integrity monitoring has been developed and evaluated in this study. The sensor is based on relative trans-Membrane pressures created by two Membranes in series inside the sensor device that detects deposition from the sample stream onto the first of the sensor Membranes. The sensor pressure signals can distinguish between intact or damaged Membranes in the upstream Membrane filtration process. Studies were conducted to evaluate both stabilities and sensitivities of the relative trans-Membrane pressure monitoring technique. Sensitivity, based on the response times of the Membrane sensor for particle detection, was determined for a range of operating conditions, Membrane sandwich configurations, and particle concentrations in both simulated Membrane failures and for actual pin-hole defects on a submerged MF Membrane. The results showed that both sensitivities and stability strongly depended on Membrane sandwich configurations (Membrane characteristics) in the sensor, and mode of operation (pressurized or vacuum). The Membrane sensor detected bentonite particles with a concentration of 0.3 mg/L (turbidity ???0.3 NTU) in approximately 35 min in the vacuum mode. The sensor is reliable, sensitive and low cost. It has potential applications in decentralized systems or in multichannel monitoring of local conditions in a large plant. Possible applications of the Membrane sensor for fouling monitoring are also discussed. ?? 2008 Elsevier B.V. All rights reserved.
