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Articles de revues sur le sujet « Nanofluidic Membrane »

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Auteur : Grafiati
Publié le 14 mars 2023

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1

Rahman, Md Mushfequr. « Membranes for Osmotic Power Generation by Reverse Electrodialysis ». Membranes 13, no 2 (28 janvier 2023) : 164. http://dx.doi.org/10.3390/membranes13020164.

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In recent years, the utilization of the selective ion transport through porous membranes for osmotic power generation (blue energy) has received a lot of attention. The principal of power generation using the porous membranes is same as that of conventional reverse electrodialysis (RED), but nonporous ion exchange membranes are conventionally used for RED. The ion transport mechanisms through the porous and nonporous membranes are considerably different. Unlike the conventional nonporous membranes, the ion transport through the porous membranes is largely dictated by the principles of nanofluidics. This owes to the fact that the osmotic power generation via selective ion transport through porous membranes is often referred to as nanofluidic reverse electrodialysis (NRED) or nanopore-based power generation (NPG). While RED using nonporous membranes has already been implemented on a pilot-plant scale, the progress of NRED/NPG has so far been limited in the development of small-scale, novel, porous membrane materials. The aim of this review is to provide an overview of the membrane design concepts of nanofluidic porous membranes for NPG/NRED. A brief description of material design concepts of conventional nonporous membranes for RED is provided as well.
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Li, Tian, Sylvia Xin Li, Weiqing Kong, Chaoji Chen, Emily Hitz, Chao Jia, Jiaqi Dai et al. « A nanofluidic ion regulation membrane with aligned cellulose nanofibers ». Science Advances 5, no 2 (février 2019) : eaau4238. http://dx.doi.org/10.1126/sciadv.aau4238.

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The advancement of nanofluidic applications will require the identification of materials with high-conductivity nanoscale channels that can be readily obtained at massive scale. Inspired by the transpiration in mesostructured trees, we report a nanofluidic membrane consisting of densely packed cellulose nanofibers directly derived from wood. Numerous nanochannels are produced among an expansive array of one-dimensional cellulose nanofibers. The abundant functional groups of cellulose enable facile tuning of the surface charge density via chemical modification. The nanofiber-nanofiber spacing can also be tuned from ~2 to ~20 nm by structural engineering. The surface-charge-governed ionic transport region shows a high ionic conductivity plateau of ~2 mS cm−1 (up to 10 mM). The nanofluidic membrane also exhibits excellent mechanical flexibility, demonstrating stable performance even when the membrane is folded 150°. Combining the inherent advantages of cellulose, this novel class of membrane offers an environmentally responsible strategy for flexible and printable nanofluidic applications.
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Tu, Qingsong, Wice Ibrahimi, Steven Ren, James Wu et Shaofan Li. « A Molecular Dynamics Study on Rotational Nanofluid and Its Application to Desalination ». Membranes 10, no 6 (6 juin 2020) : 117. http://dx.doi.org/10.3390/membranes10060117.

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In this work, we systematically study a rotational nanofluidic device for reverse osmosis (RO) desalination by using large scale molecular dynamics modeling and simulation. Moreover, we have compared Molecular Dynamics simulation with fluid mechanics modeling. We have found that the pressure generated by the centrifugal motion of nanofluids can counterbalance the osmosis pressure developed from the concentration gradient, and hence provide a driving force to filtrate fresh water from salt water. Molecular Dynamics modeling of two different types of designs are performed and compared. Results indicate that this novel nanofluidic device is not only able to alleviate the fouling problem significantly, but it is also capable of maintaining high membrane permeability and energy efficiency. The angular velocity of the nanofluids within the device is investigated, and the critical angular velocity needed for the fluids to overcome the osmotic pressure is derived. Meanwhile, a maximal angular velocity value is also identified to avoid Taylor-Couette instability. The MD simulation results agree well with continuum modeling results obtained from fluid hydrodynamics theory, which provides a theoretical foundation for scaling up the proposed rotational osmosis device. Successful fabrication of such rotational RO membrane centrifuge may potentially revolutionize the membrane desalination technology by providing a fundamental solution to the water resource problem.
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Kim, Sungho, Ece Isenbike Ozalp et Jeffrey A. Weldon. « Stacked Gated Nanofluidic Logic Gate Membrane ». IEEE Transactions on Nanotechnology 18 (2019) : 536–41. http://dx.doi.org/10.1109/tnano.2019.2917276.

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Zhang, Zhen, Panpan Zhang, Sheng Yang, Tao Zhang, Markus Löffler, Huanhuan Shi, Martin R. Lohe et Xinliang Feng. « Oxidation promoted osmotic energy conversion in black phosphorus membranes ». Proceedings of the National Academy of Sciences 117, no 25 (8 juin 2020) : 13959–66. http://dx.doi.org/10.1073/pnas.2003898117.

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Two-dimensional (2D) nanofluidic ion transporting membranes show great promise in harvesting the “blue” osmotic energy between river water and sea water. Black phosphorus (BP), an emerging layered material, has recently been explored for a wide range of ambient applications. However, little attention has been paid to the extraction of the worldwide osmotic energy, despite its large potential as an energy conversion membrane. Here, we report an experimental investigation of BP membrane in osmotic energy conversion and reveal how the oxidation of BP influences power generation. Through controllable oxidation in water, power output of the BP membrane can be largely enhanced, which can be attributed to the generated charged phosphorus compounds. Depending on the valence of oxidized BP that is associated with oxygen concentration, the power density can be precisely controlled and substantially promoted by ∼220% to 1.6 W/m2(compared with the pristine BP membrane). Moreover, through constructing a heterostructure with graphene oxide, ion selectivity of the BP membrane increases by ∼80%, contributing to enhanced charge separation efficiency and thus improved performance of ∼4.7 W/m2that outperforms most of the state-of-the-art 2D nanofluidic membranes.
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6

Silvestri, Antonia, Nicola Di Trani, Giancarlo Canavese, Paolo Motto Ros, Leonardo Iannucci, Sabrina Grassini, Yu Wang, Xuewu Liu, Danilo Demarchi et Alessandro Grattoni. « Silicon Carbide-Gated Nanofluidic Membrane for Active Control of Electrokinetic Ionic Transport ». Membranes 11, no 7 (15 juillet 2021) : 535. http://dx.doi.org/10.3390/membranes11070535.

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Manipulation of ions and molecules by external control at the nanoscale is highly relevant to biomedical applications. We report a biocompatible electrode-embedded nanofluidic channel membrane designed for electrofluidic applications such as ionic field-effect transistors for implantable drug-delivery systems. Our nanofluidic membrane includes a polysilicon electrode electrically isolated by amorphous silicon carbide (a-SiC). The nanochannel gating performance was experimentally investigated based on the current-voltage (I-V) characteristics, leakage current, and power consumption in potassium chloride (KCl) electrolyte. We observed significant modulation of ionic diffusive transport of both positively and negatively charged ions under physical confinement of nanochannels, with low power consumption. To study the physical mechanism associated with the gating performance, we performed electrochemical impedance spectroscopy. The results showed that the flat band voltage and density of states were significantly low. In light of its remarkable performance in terms of ionic modulation and low power consumption, this new biocompatible nanofluidic membrane could lead to a new class of silicon implantable nanofluidic systems for tunable drug delivery and personalized medicine.
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7

Karlsson, Anders, Mattias Karlsson, Roger Karlsson, Kristin Sott, Anders Lundqvist, Michal Tokarz et Owe Orwar. « Nanofluidic Networks Based on Surfactant Membrane Technology ». Analytical Chemistry 75, no 11 (juin 2003) : 2529–37. http://dx.doi.org/10.1021/ac0340206.

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8

Gogoi, Raj Kumar, et Kalyan Raidongia. « Intercalating cation specific self-repairing of vermiculite nanofluidic membrane ». Journal of Materials Chemistry A 6, no 44 (2018) : 21990–98. http://dx.doi.org/10.1039/c8ta01885e.

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9

Long, Rui, Zhengfei Kuang, Zhichun Liu et Wei Liu. « Ionic thermal up-diffusion in nanofluidic salinity-gradient energy harvesting ». National Science Review 6, no 6 (30 juillet 2019) : 1266–73. http://dx.doi.org/10.1093/nsr/nwz106.

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Abstract Advances in nanofabrication and materials science give a boost to the research in nanofluidic energy harvesting. Contrary to previous efforts on isothermal conditions, here a study on asymmetric temperature dependence in nanofluidic power generation is conducted. Results are somewhat counterintuitive. A negative temperature difference can significantly improve the membrane potential due to the impact of ionic thermal up-diffusion that promotes the selectivity and suppresses the ion-concentration polarization, especially at the low-concentration side, which results in dramatically enhanced electric power. A positive temperature difference lowers the membrane potential due to the impact of ionic thermal down-diffusion, although it promotes the diffusion current induced by decreased electrical resistance. Originating from the compromise of the temperature-impacted membrane potential and diffusion current, a positive temperature difference enhances the power at low transmembrane-concentration intensities and hinders the power for high transmembrane-concentration intensities. Based on the system's temperature response, we have proposed a simple and efficient way to fabricate tunable ionic voltage sources and enhance salinity-gradient energy conversion based on small nanoscale biochannels and mimetic nanochannels. These findings reveal the importance of a long-overlooked element—temperature—in nanofluidic energy harvesting and provide insights for the optimization and fabrication of high-performance nanofluidic power devices.
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10

Di Trani, Nicola, Antonia Silvestri, Antons Sizovs, Yu Wang, Donald R. Erm, Danilo Demarchi, Xuewu Liu et Alessandro Grattoni. « Electrostatically gated nanofluidic membrane for ultra-low power controlled drug delivery ». Lab on a Chip 20, no 9 (2020) : 1562–76. http://dx.doi.org/10.1039/d0lc00121j.

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11

Zhang, Yanbing, Guoke Zhao, Hongwei Zhu et Lei Jiang. « Enhanced ionic photocurrent generation through a homogeneous graphene derivative composite membrane ». Chemical Communications 56, no 68 (2020) : 9819–22. http://dx.doi.org/10.1039/d0cc04204h.

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Yang, Jinlei, Xiaopeng Zhang, Fengxiang Chen et Lei Jiang. « Geometry modulation of ion diffusion through layered asymmetric graphene oxide membranes ». Chemical Communications 55, no 21 (2019) : 3140–43. http://dx.doi.org/10.1039/c9cc00239a.

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Xiao, Tianliang, Jing Ma, Zhaoyue Liu, Bingxin Lu, Jiaqiao Jiang, Xiaoyan Nie, Rifeng Luo et al. « Tunable rectifications in nanofluidic diodes by ion selectivity of charged polystyrene opals for osmotic energy conversion ». Journal of Materials Chemistry A 8, no 22 (2020) : 11275–81. http://dx.doi.org/10.1039/d0ta02162h.

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14

Chang, Chen-Wei, Chien-Wei Chu, Yen-Shao Su et Li-Hsien Yeh. « Space charge enhanced ion transport in heterogeneous polyelectrolyte/alumina nanochannel membranes for high-performance osmotic energy conversion ». Journal of Materials Chemistry A 10, no 6 (2022) : 2867–75. http://dx.doi.org/10.1039/d1ta08560c.

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15

Yan, Fei, Lina Yao, Kenxin Chen, Qian Yang et Bin Su. « An ultrathin and highly porous silica nanochannel membrane : toward highly efficient salinity energy conversion ». Journal of Materials Chemistry A 7, no 5 (2019) : 2385–91. http://dx.doi.org/10.1039/c8ta10848j.

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16

Luo, Kuiguang, Tao Huang, Qi Li, Junchao Lao, Jun Gao et Yi Tang. « Nanofluidic proton channels based on a 2D layered glass membrane with improved aqueous and acid stability ». RSC Advances 12, no 46 (2022) : 29640–46. http://dx.doi.org/10.1039/d2ra03848j.

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17

Ma, Qun, Liang Chen et Fan Xia. « Chiral nanofluidic membrane for detection of circular polarization light ». Matter 5, no 5 (mai 2022) : 1345–47. http://dx.doi.org/10.1016/j.matt.2022.03.015.

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18

Jia, Pan, Xinyi Du, Ruiqi Chen, Jinming Zhou, Marco Agostini, Jinhua Sun et Linhong Xiao. « The Combination of 2D Layered Graphene Oxide and 3D Porous Cellulose Heterogeneous Membranes for Nanofluidic Osmotic Power Generation ». Molecules 26, no 17 (2 septembre 2021) : 5343. http://dx.doi.org/10.3390/molecules26175343.

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Salinity gradient energy, as a type of blue energy, is a promising sustainable energy source. Its energy conversion efficiency is significantly determined by the selective membranes. Recently, nanofluidic membrane made by two-dimensional (2D) nanomaterials (e.g., graphene) with densely packed nanochannels has been considered as a high-efficient membrane in the osmotic power generation research field. Herein, the graphene oxide-cellulose acetate (GO–CA) heterogeneous membrane was assembled by combining a porous CA membrane and a layered GO membrane; the combination of 2D nanochannels and 3D porous structures make it show high surface-charge-governed property and excellent ion transport stability, resulting in an efficient osmotic power harvesting. A power density of about 0.13 W/m2 is achieved for the sea–river mimicking system and up to 0.55 W/m2 at a 500-fold salinity gradient. With different functions, the CA and GO membranes served as ion storage layer and ion selection layer, respectively. The GO–CA heterogeneous membrane open a promising avenue for fabrication of porous and layered platform for wide potential applications, such as sustainable power generation, water purification, and seawater desalination.
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19

Li, Xiaoyan, Junchao Lao, Guojie Li, Jian Song et Jiayan Luo. « A bio-inspired transpiration ion pump based on MXene ». Materials Chemistry Frontiers 4, no 11 (2020) : 3361–67. http://dx.doi.org/10.1039/d0qm00569j.

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20

Kim, Minseok, et Taesung Kim. « Crack-Photolithography for Membrane-Free Diffusion-Based Micro/Nanofluidic Devices ». Analytical Chemistry 87, no 22 (14 juillet 2015) : 11215–23. http://dx.doi.org/10.1021/acs.analchem.5b02028.

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Lao, Junchao, Ruijing Lv, Jun Gao, Aoxuan Wang, Jinsong Wu et Jiayan Luo. « Aqueous Stable Ti3C2MXene Membrane with Fast and Photoswitchable Nanofluidic Transport ». ACS Nano 12, no 12 (29 novembre 2018) : 12464–71. http://dx.doi.org/10.1021/acsnano.8b06708.

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22

Noy, Aleksandr. « Carbon Nanotube Porins : Biomimetic Membrane Pore Channels for Nanofluidic Studies ». Biophysical Journal 110, no 3 (février 2016) : 531a. http://dx.doi.org/10.1016/j.bpj.2015.11.2838.

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23

Lee, Hyekyung, Junsuk Kim, Hyeonsoo Kim, Ho-Young Kim, Hyomin Lee et Sung Jae Kim. « A concentration-independent micro/nanofluidic active diode using an asymmetric ion concentration polarization layer ». Nanoscale 9, no 33 (2017) : 11871–80. http://dx.doi.org/10.1039/c7nr02075a.

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The new class of micro/nanofluidic diodes with an ideal perm-selective membrane were demonstrated at a wide concentration range from 10−5 M to 3 M. Moreover, the rectification factor was actively controlled by adjusting the external convective flows.
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24

Konch, Tukhar Jyoti, Raj Kumar Gogoi, Abhijit Gogoi, Kundan Saha, Jumi Deka, K. Anki Reddy et Kalyan Raidongia. « Nanofluidic transport through humic acid modified graphene oxide nanochannels ». Materials Chemistry Frontiers 2, no 9 (2018) : 1647–54. http://dx.doi.org/10.1039/c8qm00272j.

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Bush, Stevie N., Thomas T. Volta et Charles R. Martin. « Chemical Sensing and Chemoresponsive Pumping with Conical-Pore Polymeric Membranes ». Nanomaterials 10, no 3 (21 mars 2020) : 571. http://dx.doi.org/10.3390/nano10030571.

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Synthetic membranes containing asymmetrically shaped pores have been shown to rectify the ionic current flowing through the membrane. Ion-current rectification means that such membranes produce nonlinear current–voltage curves analogous to those observed with solid-state diode rectifiers. In order to observe this ion-current rectification phenomenon, the asymmetrically shaped pores must have pore-wall surface charge. Pore-wall surface charge also allows for electroosmotic flow (EOF) to occur through the membrane. We have shown that, because ion-current is rectified, EOF is likewise rectified in such membranes. This means that flow through the membrane depends on the polarity of the voltage applied across the membrane, one polarity producing a higher, and the opposite producing a lower, flow rate. As is reviewed here, these ion-current and EOF rectification phenomena are being used to develop new sensing technologies. Results obtained from an ion-current-based sensor for hydrophobic cations are reviewed. In addition, ion-current and EOF rectification can be combined to make a new type of device—a chemoresponsive nanofluidic pump. This is a pump that either turns flow on or turns flow off, when a specific chemical species is detected. Results from a prototype Pb2+ chemoresponsive pump are also reviewed here.
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Di Trani, Nicola, Antonia Silvestri, Yu Wang, Danilo Demarchi, Xuewu Liu et Alessandro Grattoni. « Silicon Nanofluidic Membrane for Electrostatic Control of Drugs and Analytes Elution ». Pharmaceutics 12, no 7 (19 juillet 2020) : 679. http://dx.doi.org/10.3390/pharmaceutics12070679.

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Individualized long-term management of chronic pathologies remains an elusive goal despite recent progress in drug formulation and implantable devices. The lack of advanced systems for therapeutic administration that can be controlled and tailored based on patient needs precludes optimal management of pathologies, such as diabetes, hypertension, rheumatoid arthritis. Several triggered systems for drug delivery have been demonstrated. However, they mostly rely on continuous external stimuli, which hinder their application for long-term treatments. In this work, we investigated a silicon nanofluidic technology that incorporates a gate electrode and examined its ability to achieve reproducible control of drug release. Silicon carbide (SiC) was used to coat the membrane surface, including nanochannels, ensuring biocompatibility and chemical inertness for long-term stability for in vivo deployment. With the application of a small voltage (≤ 3 V DC) to the buried polysilicon electrode, we showed in vitro repeatable modulation of membrane permeability of two model analytes—methotrexate and quantum dots. Methotrexate is a first-line therapeutic approach for rheumatoid arthritis; quantum dots represent multi-functional nanoparticles with broad applicability from bio-labeling to targeted drug delivery. Importantly, SiC coating demonstrated optimal properties as a gate dielectric, which rendered our membrane relevant for multiple applications beyond drug delivery, such as lab on a chip and micro total analysis systems (µTAS).
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Gogoi, Raj Kumar, Arindom Bikash Neog, Tukhar Jyoti Konch, Neelam Sarmah et Kalyan Raidongia. « A two-dimensional ion-pump of a vanadium pentoxide nanofluidic membrane ». Journal of Materials Chemistry A 7, no 17 (2019) : 10552–60. http://dx.doi.org/10.1039/c8ta11233a.

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The reactive surface and layered crystal structure of vanadium pentoxide (V2O5) are exploited here to prepare a two-dimensional (2D) ion pump that transports ions against their concentration gradient.
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Bagolini, Alvise, Raffaele Correale, Antonino Picciotto, Maurizio Di Lorenzo et Marco Scapinello. « MEMS Membranes with Nanoscale Holes for Analytical Applications ». Membranes 11, no 2 (20 janvier 2021) : 74. http://dx.doi.org/10.3390/membranes11020074.

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Micro-electro-mechanical membranes having nanoscale holes were developed, to be used as a nanofluidic sample inlet in novel analytical applications. Nanoscopic holes can be used as sampling points to enable a molecular flow regime, enhancing the performance and simplifying the layout of mass spectrometers and other analytical systems. To do this, the holes must be placed on membranes capable of consistently withstanding a pressure gradient of 1 bar. To achieve this goal, a membrane-in-membrane structure was adopted, where a larger and thicker membrane is microfabricated, and smaller sub-membranes are then realized in it. The nanoscopic holes are opened in the sub-membranes. Prototype devices were fabricated, having hole diameters from 300 to 600 nm, a membrane side of 80 μm, and a simulated maximum displacement of less than 150 nm under a 1 bar pressure gradient. The obtained prototypes were tested in a dedicated vacuum system, and a method to calculate the effective orifice diameter using gas flow measurements at different pressure gradients was implemented. The calculated diameters were in good agreement with the target diameter sizes. Micro-electro-mechanical technology was successfully used to develop a novel micromembrane with nanoscopic holes, and the fabricated prototypes were successfully used as a gas inlet in a vacuum system for mass spectrometry and other analytical systems.
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29

Kravets, L. I., M. Yu Yablokov, A. B. Gilman, A. N. Shchegolikhin, B. Mitu et G. Dinescu. « Micro- and nanofluidic diodes based on track-etched poly(ethylene terephthalate) membrane ». High Energy Chemistry 49, no 5 (31 août 2015) : 367–74. http://dx.doi.org/10.1134/s0018143915050070.

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Ji, Jinzhao, Qian Kang, Yi Zhou, Yaping Feng, Xi Chen, Jinying Yuan, Wei Guo, Yen Wei et Lei Jiang. « Osmotic Power Generation with Positively and Negatively Charged 2D Nanofluidic Membrane Pairs ». Advanced Functional Materials 27, no 2 (28 octobre 2016) : 1603623. http://dx.doi.org/10.1002/adfm.201603623.

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Zhou, Yi, Hao Ding, Andrew T. Smith, Xiaohui Jia, Song Chen, Lan Liu, Sonia E. Chavez et al. « Nanofluidic energy conversion and molecular separation through highly stable clay-based membranes ». Journal of Materials Chemistry A 7, no 23 (2019) : 14089–96. http://dx.doi.org/10.1039/c9ta00801b.

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Wang, Kai Ge, Peng Ye Wang, Shuang Lin Yue, Ai Zi Jin, Chang Zhi Gu et Han Ben Niu. « Fabricating Nanofluidic Channels and Applying them for DNA Molecules Study ». Solid State Phenomena 121-123 (mars 2007) : 777–80. http://dx.doi.org/10.4028/www.scientific.net/ssp.121-123.777.

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In the emerging field of nanobiotechnology, further downsizing the fluidic channels and pores to the nanometer scale are attractive for both fundamental studies and technical applications. The insulation Silicon nitride membrane nanofluidic channel arrays which have width ~50nm and depth ~80nm and length ≥20μm were created by focused-ion-beam instrument. The λ-DNA molecules were put inside nanochannels and transferred, a fluorescence microscopy was used to observe the images. Only by capillary force, λ-DNA molecules moved inside the nanochannels which dealt with activating reagent Brij aqueous solution. These scope nanostructure devices will help us study DNA transporting through a nanopore and understand more DNA dynamics characteristics.
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Deka, Jumi, Kundan Saha, Anish Yadav et Kalyan Raidongia. « Clay-Based Nanofluidic Membrane Derived from Vermiculite Nanoflakes for Pressure-Responsive Power Generation ». ACS Applied Nano Materials 4, no 5 (6 mai 2021) : 4872–80. http://dx.doi.org/10.1021/acsanm.1c00441.

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Xu, Peijie, Yi Zhou et Hongfei Cheng. « Large-scale orientated self-assembled halloysite nanotubes membrane with nanofluidic ion transport properties ». Applied Clay Science 180 (novembre 2019) : 105184. http://dx.doi.org/10.1016/j.clay.2019.105184.

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Wu, Songmei, Fabien Wildhaber, Arnaud Bertsch, Juergen Brugger et Philippe Renaud. « Field effect modulated nanofluidic diode membrane based on Al2O3/W heterogeneous nanopore arrays ». Applied Physics Letters 102, no 21 (27 mai 2013) : 213108. http://dx.doi.org/10.1063/1.4807781.

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Guo, Wei, Chi Cheng, Yanzhe Wu, Yanan Jiang, Jun Gao, Dan Li et Lei Jiang. « Bio-Inspired Two-Dimensional Nanofluidic Generators Based on a Layered Graphene Hydrogel Membrane ». Advanced Materials 25, no 42 (31 juillet 2013) : 6064–68. http://dx.doi.org/10.1002/adma.201302441.

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Qiao, Yujuan, Jiahao Lu, Wenjie Ma, Yifei Xue, Yanan Jiang, Nannan Liu, Ping Yu et Lanqun Mao. « Optoelectronic modulation of ionic conductance and rectification through a heterogeneous 1D/2D nanofluidic membrane ». Chemical Communications 56, no 24 (2020) : 3508–11. http://dx.doi.org/10.1039/d0cc00082e.

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A smart mixed-dimensional heterogeneous membrane is fabricated, through which the ionic conductance and rectification can be precisely and robustly modulated by visible light of 420 nm wavelength with different power intensities simultaneously.
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Kang, M., T. J. Ha, S. G. Park et Y. W. Choi. « Membrane-based micro/nanofluidic generator via hydrophobic hydration for massive and efficient energy harvesting ». Materials Today Sustainability 17 (mars 2022) : 100108. http://dx.doi.org/10.1016/j.mtsust.2021.100108.

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Park, Chul Ho, Harim Bae, Chan-soo Kim, Dong-Hyun Peck et Jonghwi Lee. « Nanofluidic energy harvesting through a biological 1D protein-embedded nanofilm membrane by interfacial polymerization ». Nano Energy 74 (août 2020) : 104906. http://dx.doi.org/10.1016/j.nanoen.2020.104906.

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Gao, Jun, Xueli Liu, Yanan Jiang, Liping Ding, Lei Jiang et Wei Guo. « Understanding the Giant Gap between Single‐Pore‐ and Membrane‐Based Nanofluidic Osmotic Power Generators ». Small 15, no 11 (17 janvier 2019) : 1804279. http://dx.doi.org/10.1002/smll.201804279.

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Tetuko, Anggito P., Lukman F. Nurdiyansah, Nining S. Asri, Eko A. Setiadi, Achmad Maulana S. Sebayang, Masno Ginting et Perdamean Sebayang. « Experimental Investigations and Analytical Models of Water-Magnetite (Fe3O4) Nanofluids for Polymer Electrolyte Membrane (PEM) Fuel Cell Cooling Application ». Journal of Nanofluids 12, no 2 (1 mars 2023) : 487–97. http://dx.doi.org/10.1166/jon.2023.1904.

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Water magnetite nanofluids for Polymer Electrolyte Membrane (PEM) fuel cell cooling application have been investigated. Nanofluid of water-magnetite (Fe3O4) has been synthesized using a two-step method. The particle size and its distribution, the stability and thermal conductivity of the nanofluid were characterized. The nanofluid is stable after 90 days (zeta potential value of 32.11 mV), and the measured thermal conductivity of the nanofluid at ambient temperature is 0.60 W/m.°C. The particles and nanofluid characterizations were used as the parameters in the analytical model to investigate the effect of particle diameter and volume fraction to the thermal conductivity of nanofluid and heat transfer in the PEM fuel cell. The analytical model suggested that the PEM fuel cell could produces an output power of 100 W and the heat that needs to be removed (cooling load) of 180 W, where 1×10−3 kg/s of nanofluid is required. The analytical model that used a particle diameter of 120 nm produces similar nanofluid’s thermal conductivity of 0.6 W/m.°C as the measurement. Less diameter particle improves the nanofluid’s thermal conductivity value. Higher volume fraction of 0.25 could enhances the nanofluid’s thermal conductivity value to 0.61 W/m.°C.
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42

Park, Jae, Jeewhan Oh et Sung Kim. « Controllable pH Manipulations in Micro/Nanofluidic Device Using Nanoscale Electrokinetics ». Micromachines 11, no 4 (10 avril 2020) : 400. http://dx.doi.org/10.3390/mi11040400.

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Recently introduced nanoscale electrokinetic phenomenon called ion concentration polarization (ICP) has been suffered from serious pH changes to the sample fluid. A number of studies have focused on the origin of pH changes and strategies for regulating it. Instead of avoiding pH changes, in this work, we tried to demonstrate new ways to utilize this inevitable pH change. First, one can obtain a well-defined pH gradient in proton-received microchannel by applying a fixed electric current through a proton exchange membrane. Furthermore, one can tune the pH gradient on demand by adjusting the proton mass transportation (i.e., adjusting electric current). Secondly, we demonstrated that the occurrence of ICP can be examined by sensing a surrounding pH of electrolyte solution. When pH > threshold pH, patterned pH-responsive hydrogel inside a straight microchannel acted as a nanojunction to block the microchannel, while it did as a microjunction when pH < threshold pH. In case of forming a nanojunction, electrical current significantly dropped compared to the case of a microjunction. The strategies that presented in this work would be a basis for useful engineering applications such as a localized pH stimulation to biomolecules using tunable pH gradient generation and portable pH sensor with pH-sensitive hydrogel.
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43

Fine, Daniel, Alessandro Grattoni, Sharath Hosali, Arturas Ziemys, Enrica De Rosa, Jaskaran Gill, Ryan Medema et al. « A robust nanofluidic membrane with tunable zero-order release for implantable dose specific drug delivery ». Lab on a Chip 10, no 22 (2010) : 3074. http://dx.doi.org/10.1039/c0lc00013b.

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Xiao, Tianliang, Qianqian Zhang, Jiaqiao Jiang, Jing Ma, Qingqing Liu, Bingxin Lu, Zhaoyue Liu et Jin Zhai. « pH‐Resistant Nanofluidic Diode Membrane for High‐Performance Conversion of Salinity Gradient into Electric Energy ». Energy Technology 7, no 5 (12 avril 2019) : 1800952. http://dx.doi.org/10.1002/ente.201800952.

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Tanabe, Masashi, Koji Ando, Ryota Komatsu et Kenichi Morigaki. « Nanofluidic Biosensor Created by Bonding Patterned Model Cell Membrane and Silicone Elastomer with Silica Nanoparticles ». Small 14, no 49 (21 octobre 2018) : 1802804. http://dx.doi.org/10.1002/smll.201802804.

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46

Zhang, Rong-You, Mengyao Gao, Wei-Ren Liu, Wei-Hung Chiang et Li-Hsien Yeh. « A graphene/carbon black nanofluidic membrane with fast ion transport for enhanced electrokinetic energy generation ». Carbon 204 (février 2023) : 1–6. http://dx.doi.org/10.1016/j.carbon.2022.12.047.

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47

Raman, Ritu, Erin B. Rousseau, Michael Wade, Allison Tong, Max J. Cotler, Jenevieve Kuang, Alejandro Aponte Lugo et al. « Platform for micro-invasive membrane-free biochemical sampling of brain interstitial fluid ». Science Advances 6, no 39 (septembre 2020) : eabb0657. http://dx.doi.org/10.1126/sciadv.abb0657.

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Neurochemical dysregulation underlies many pathologies and can be monitored by measuring the composition of brain interstitial fluid (ISF). Existing in vivo tools for sampling ISF do not enable measuring large rare molecules, such as proteins and neuropeptides, and thus cannot generate a complete picture of the neurochemical connectome. Our micro-invasive platform, composed of a nanofluidic pump coupled to a membrane-free probe, enables sampling multiple neural biomarkers in parallel. This platform outperforms the state of the art in low-flow pumps by offering low volume control (single stroke volumes, <3 nl) and bidirectional fluid flow (<100 nl/min) with negligible dead volume (<30 nl) and has been validated in vitro, ex vivo, and in vivo in rodents. ISF samples (<1.5 μL) can be processed via liquid chromatography–tandem mass spectrometry. These label-free liquid biopsies of the brain could yield a deeper understanding of the onset, mechanism, and progression of diverse neural pathologies.
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Ge, Yanyan, Jieyu Xian, Min Kang, Xiaolin Li et Meifu Jin. « MD Study of Solution Concentrations on Ion Distribution in a Nanopore-Based Device Inspired from Red Blood Cells ». Computational and Mathematical Methods in Medicine 2016 (2016) : 1–5. http://dx.doi.org/10.1155/2016/2787382.

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A molecular dynamics model of a nanopore-based device, which is similar to the nanopores in a cell membrane, was used to determine the influence of solution concentration on radial ion distribution, screening effects, and the radial potential profile in the nanopore. Results from these simulations indicate that as the solution concentration increases, the density peaks for both the counterion and coion near the charged wall increase at different speeds as screening effects appeared. Consequently, the potential near the charged wall of the nanopore changed from negative to positive during the simulation. The detailed understanding of ion distribution in nanopores is important for controlling the ion permeability and improving the cell transfection and also the design and application of nanofluidic devices.
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Long, Rui, Zuoqing Luo, Zhengfei Kuang, Zhichun Liu et Wei Liu. « Effects of heat transfer and the membrane thermal conductivity on the thermally nanofluidic salinity gradient energy conversion ». Nano Energy 67 (janvier 2020) : 104284. http://dx.doi.org/10.1016/j.nanoen.2019.104284.

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Li, Zirui, Wei Liu, Lingyan Gong, Yudan Zhu, Yuantong Gu et Jongyoon Han. « Accurate Multi-Physics Numerical Analysis of Particle Preconcentration Based on Ion Concentration Polarization ». International Journal of Applied Mechanics 09, no 08 (décembre 2017) : 1750107. http://dx.doi.org/10.1142/s1758825117501071.

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This paper studies the mechanism of preconcentration of charged particles in a straight microchannel embedded with permselective membranes by numerically solving the coupled transport equations of ions, charged particles and solvent fluid without any simplifying assumptions. It is demonstrated that trapping and preconcentration of charged particles are determined by the interplay between drag force from the electroosmotic fluid flow and the electrophoretic force applied through the electric field. Several insightful characteristics are revealed, including the diverse dynamics of co-ions and counter ions, replacement of co-ions by focused particles, lowered ion concentrations in particle-enriched zone, and enhanced electroosmotic pumping effect, etc. Conditions for particles that can be concentrated are identified in terms of charges, sizes and electrophoretic mobilities of particles and co-ions. Dependences of enrichment factor on cross-membrane voltage, initial particle concentration and buffer ion concentrations are analyzed and the underlying reasons are elaborated. Finally, post priori condition for the validity of decoupled simulation model is given based on the charges carried by focused particles and buffer co-ions. These results provide an important guidance in the design and optimization of nanofluidic preconcentration and other related devices.
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