scholarly journals Designing organic solvent separation membranes: Polymers, porous structures, 2D materials, and their combinations

2021 ◽  
Author(s):  
Ameya Manoj Tandel ◽  
Wenji Guo ◽  
Kelly Bye ◽  
Liang Huang ◽  
Michele Galizia ◽  
...  
Keyword(s):  
Organic Solvent ◽  
High Selectivity ◽  
2D Materials ◽  
Porous Structures ◽  
Membrane Materials ◽  
Term Stability ◽  
Long Term Stability ◽  
Separation Membranes ◽  
Tremendous Progress

As interest for membrane-based organic solvent separation increases, membrane materials exhibiting high permeance, high selectivity, and long-term stability against solvents are sought. Membrane technology has experienced tremendous progress by integrating...

scholarly journals Highly Responsive and Ultrasensitive Non-Enzymatic Electrochemical Glucose Sensor Based on Au Foam

Sensors ◽  
2019 ◽  
Vol 19 (5) ◽  
pp. 1203 ◽  
Author(s):  
Nannan Shen ◽  
Haijun Xu ◽  
Weichen Zhao ◽  
Yongmei Zhao ◽  
Xin Zhang
Keyword(s):  
High Selectivity ◽  
Glucose Sensor ◽  
Limit Of Detection ◽  
Surface Enhanced Raman Spectroscopy ◽  
Au Nanoparticle ◽  
Quantitative Detection ◽  
Term Stability ◽  
Long Term Stability ◽  
Surface Enhanced Raman

Glucose concentration is an important physiological index, therefore methods for sensitive detection of glucose are important. In this study, Au foam was prepared by electrodeposition with a dynamic gas template on an Au nanoparticle/Si substrate. The Au foam showed ultrasensitivity, high selectivity, and long-term stability in the quantitative detection of glucose. The foam was used as an electrode, and the amperometric response indicated excellent catalytic activity in glucose oxidation, with a linear response across the concentration range 0.5 μM to 12 mM, and a limit of detection of 0.14 μM. High selectivity for interfering molecules at six times the normal level and long-term stability for 30 days were obtained. The results for electrochemical detection with Au foam of glucose in human serum were consistent with those obtained with a sensor based on surface-enhanced Raman spectroscopy and a commercial sensor. This proves that this method can be used with real samples. These results show that Au foam has great potential for use as a non-enzymatic glucose sensor.

scholarly journals Long-Term Stability of Polymer-Coated Surface Transverse Wave Sensors for the Detection of Organic Solvent Vapors

Sensors ◽  
2017 ◽  
Vol 17 (11) ◽  
pp. 2529 ◽  
Author(s):  
Ullrich Stahl ◽  
Achim Voigt ◽  
Marian Dirschka ◽  
Nicole Barié ◽  
Christiane Richter ◽  
...  
Keyword(s):  
Organic Solvent ◽  
Transverse Wave ◽  
Term Stability ◽  
Long Term Stability ◽  
Coated Surface ◽  
Wave Sensors ◽  
Solvent Vapors

scholarly journals Soft Devices for High-Resolution Neuro-Stimulation: The Interplay Between Low-Rigidity and Resolution

2021 ◽  
Vol 3 ◽  
Author(s):  
Ieva Vėbraitė ◽  
Yael Hanein
Keyword(s):  
High Resolution ◽  
State Of The Art ◽  
Neural Tissue ◽  
Great Promise ◽  
Low Resolution ◽  
Term Stability ◽  
Long Term Stability ◽  
Tremendous Progress ◽  
Technological Perspective

The field of neurostimulation has evolved over the last few decades from a crude, low-resolution approach to a highly sophisticated methodology entailing the use of state-of-the-art technologies. Neurostimulation has been tested for a growing number of neurological applications, demonstrating great promise and attracting growing attention in both academia and industry. Despite tremendous progress, long-term stability of the implants, their large dimensions, their rigidity and the methods of their introduction and anchoring to sensitive neural tissue remain challenging. The purpose of this review is to provide a concise introduction to the field of high-resolution neurostimulation from a technological perspective and to focus on opportunities stemming from developments in materials sciences and engineering to reduce device rigidity while optimizing electrode small dimensions. We discuss how these factors may contribute to smaller, lighter, softer and higher electrode density devices.

scholarly journals Study of lifetime of Platinum Modified Metal Oxides Electrodes

2020 ◽  
Vol 14 (4) ◽  
pp. 1479-1488
Author(s):  
Lemeyonouin Aliou Guillaume Pohan ◽  
Ollo Kambiré ◽  
Mohamed Berté ◽  
Lassiné Ouattara
Keyword(s):  
Metal Oxides ◽  
Platinum Metal ◽  
Porous Structures ◽  
Term Stability ◽  
Long Term Stability ◽  
Physical Measurements ◽  
Platinum Coating ◽  
The One ◽  
A Current

Pt, IrO2, RuO2, Pt-IrO2 and Pt-RuO2 electrodes have been shown to be effective in their application in various fields. However, it is necessary to study their long-term stability. So, our objective is to prepare them and study their lifetime using intensiostatic measurement. Then they were prepared at 400 °C on titanium plates used as a substrate. Physical measurements (scanning electron microscopy) of these anodes revealed that their surface are rough and porous structures. Lifetime study was carried out in H2SO4 9 N and under a current density of 410 mA /cm2. The long-term stability of Pt improved when coupled to IrO2 in contrast to RuO2. From this study, the performance of the electrode was found to increase in the order: RuO2 < Pt-RuO2 < Pt < Pt-IrO2 < IrO2. For RuO2 and IrO2 pure electrodes, the deactivation would be due to the dissolution of precursors deposited on the titanium. For the Pt pure electrode, deactivation would be due to the detachment of platinum coating. The deactivation of the Pt-IrO2 and Pt-RuO2 electrode would be due, on the one hand to the platinum detachment from IrO2 or RuO2 and on the other hand to the metal oxides (IrO2 or RuO2) dissolution.Keywords: Electrodes, platinum, metal oxides, lifetime.

Enhanced stability and separation efficiency of graphene oxide membranes in organic solvent nanofiltration

2018 ◽  
Vol 6 (40) ◽  
pp. 19563-19569 ◽  
Author(s):  
Tiantian Gao ◽  
Haibo Wu ◽  
Lei Tao ◽  
Liangti Qu ◽  
Chun Li
Keyword(s):  
Graphene Oxide ◽  
Organic Solvent ◽  
Separation Efficiency ◽  
Term Stability ◽  
Long Term Stability ◽  
Organic Solvent Nanofiltration ◽  
Oxide Membranes ◽  
Enhanced Stability ◽  
Graphene Oxide Membranes

GO–BA membranes exhibited excellent nanofiltration performances and long-term stability for OSN with the assistance of BA polymers.

scholarly journals Proving and interpreting the spontaneous formation of bulk nanobubbles in aqueous organic solvent solutions: effects of solvent type and content

Soft Matter ◽  
2020 ◽  
Vol 16 (18) ◽  
pp. 4502-4511 ◽  
Author(s):  
Ananda J. Jadhav ◽  
Mostafa Barigou
Keyword(s):  
Organic Solvent ◽  
Organic Solvents ◽  
Pure Water ◽  
Term Stability ◽  
Long Term Stability ◽  
Spontaneous Formation ◽  
Solvent Type

We show that the mixing of organic solvents with pure water leads to the spontaneous formation of bulk nanobubbles which exhibit long-term stability on the scale of months.

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