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Littérature scientifique sur le sujet « Ultrathin Membrane »

Auteur : Grafiati

Publié le 1 avril 2023

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Articles de revues sur le sujet "Ultrathin Membrane"

Shimidzu, Takeo. « Ultrathin Conducting Polymers Membranes. » membrane 17, n^o 5 (1992) : 292–99. http://dx.doi.org/10.5360/membrane.17.292.

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Kim, Dongsu, Yeonghwan Jang, Eunho Choi, Ji Eon Chae et Segeun Jang. « Reinforced Nafion Membrane with Ultrathin MWCNTs/Ceria Layers for Durable Proton-Exchange Membrane Fuel Cells ». Membranes 12, n^o 11 (29 octobre 2022) : 1073. http://dx.doi.org/10.3390/membranes12111073.

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For further commercializing proton-exchange membrane fuel cells, it is crucial to attain long-term durability while achieving high performance. In this study, a strategy for modifying commercial Nafion membranes by introducing ultrathin multiwalled carbon nanotubes (MWCNTs)/CeO2 layers on both sides of the membrane was developed to construct a mechanically and chemically reinforced membrane electrode assembly. The dispersion properties of the MWCNTs were greatly improved through chemical modification with acid treatment, and the mixed solution of MWCNTs/CeO2 was uniformly prepared through a high-energy ball-milling process. By employing a spray-coating technique, the ultrathin MWCNTs/CeO2 layers were introduced onto the membrane surfaces without any agglomeration problem because the solvent rapidly evaporated during the layer-by-layer stacking process. These ultrathin and highly dispersed MWCNTs/CeO2 layers effectively reinforced the mechanical properties and chemical durability of the membrane while minimizing the performance drop despite their non-ion-conducting properties. The characteristics of the MWCNTs/CeO2 layers and the reinforced Nafion membrane were investigated using various in situ and ex situ measurement techniques; in addition, electrochemical measurements for fuel cells were conducted.

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KIM, Jedeok, Kazuya Yamasaki, Hitoshi Ishimoto et Yusuke Takata. « Ultrathin Electrolyte Membranes with PFSA-Vinylon Intermediate Layers for PEM Fuel Cells ». Polymers 12, n^o 8 (3 août 2020) : 1730. http://dx.doi.org/10.3390/polym12081730.

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We prepared ultrathin PFSA/PFSA-vinylon/PFSA laminated electrolyte membranes (thickness = 10 μm) for fuel cells without using a reinforcing material. Nafion and Aquivion solutions were used as PFSA polymers. Vinylon was synthesized by formalizing polyvinyl alcohol. From the current-voltage measurements using ultrathin PFSA/PFSA-vinylon/PFSA membranes; the cell resistances are significantly lower than that using a 50 μm Nafion membrane. A high current density was obtained under both low- and high-humidity conditions. Ultrathin PFSA/PFSA-vinylon/PFSA laminated membranes will help to further improve the performance of PEMFCs.

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Fazullin, D. D., L. I. Fazullina, G. V. Mavrin, I. G. Shaikhiev et V. O. Dryakhlov. « Composite membranes with cellulose acetate surface layer for water treatment ». Perspektivnye Materialy 2 (2021) : 32–40. http://dx.doi.org/10.30791/1028-978x-2021-2-32-40.

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Microporous composite membranes containing from one to three ultrathin layers were obtained by multistage immersion of a paper base in a solution of cellulose acetate in acetone. The physicochemical properties of membranes have been studied and the parameters of membrane separation of heavy metal ions from tap water have been determined. An increase in the particle size and a decrease in the absolute value of the ζ-potential with an increase in the concentration of cellulose acetate in acetone were revealed. It was found that the porosity of the membranes increased from 47 % to 51 % depending on the number of ultrathin cellulose acetate layers on the substrate surface. A decrease in the moisture absorption of composite membranes and an increase in the contact angle of wetting with distilled water from 30.0° to 68.8°, depending on the number of ultrathin layers, were noted. Microscopic examination of the membrane surface showed that the ultrathin layer consists of many pores with sizes less than 1 micron. The absorption bands in the IR spectra of cellulose acetate and the surface of the composite microporous cellulose acetate (MAC) membrane are identical. The retention capacity of MAC composite membranes, determined by iron ions from an iron (III) chloride solution, ranged from 47.5 to 97.4 % depending on the number of cellulose acetate layers on the substrate surface with a specific productivity of 27.9 to 7399 dm3/(m2·h) and a pressure of 0.35 MPa. A high selectivity of a microporous membrane of three layers of cellulose acetate (MAC3) with respect to heavy metal ions contained in tap water was established: Cr3+ (96 %) > Cu2+ (92 %) > Fe3+ (90 %) > Mn2+ (45 %).

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Cao, Zishu, Shixuan Zeng, Zhi Xu, Antonios Arvanitis, Shaowei Yang, Xuehong Gu et Junhang Dong. « Ultrathin ZSM-5 zeolite nanosheet laminated membrane for high-flux desalination of concentrated brines ». Science Advances 4, n^o 11 (novembre 2018) : eaau8634. http://dx.doi.org/10.1126/sciadv.aau8634.

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The tremendous potential of zeolite membranes for efficient molecular separation via size-exclusion effects is highly desired by the energy and chemical industries, but its practical realization has been hindered by nonselective permeation through intercrystalline spaces and high resistance to intracrystalline diffusion in the conventional zeolite membranes of randomly oriented polycrystalline structures. Here, we report the synthesis of ZSM-5 zeolite nanosheets with very large aspect ratios and nanometer-scale thickness in the preferred straight channel direction. We used these ZSM-5 nanosheets to fabricate ultrathin (<500 nm) laminated membranes on macroporous alumina substrates by a simple dip-coating process and subsequent consolidation via vapor-phase crystallization. This ultrathinb-oriented ZSM-5 membrane has demonstrated extraordinary water flux combined with high salt rejection in pervaporation desalination for brines containing up to 24 weight % of dissolved NaCl. The ZSM-5 nanosheets may also offer opportunities to developing high-performance battery ion separators, catalysts, adsorbents, and thin-film sensors.

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Jugade, Sanket S., Anuj Aggarwal et Akshay K. Naik. « Nanomechanical spectroscopy of ultrathin silicon nitride suspended membranes ». European Physical Journal Applied Physics 94, n^o 2 (mai 2021) : 20301. http://dx.doi.org/10.1051/epjap/2021210068.

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Mechanical properties of a nanomechanical resonator significantly impact the performance of a resonant Nano-electromechanical system (NEMS) device. We study the mechanical properties of suspended membranes fabricated out of low-pressure chemical vapor deposited silicon nitride thin films. We fabricated doubly-clamped membranes of silicon nitride with thickness less than 50 nm and length varying from 5 to 60 μm. The elastic modulus and stress in the suspended membranes were measured using Atomic Force Microscope (AFM)-based nanomechanical spectroscopy. The elastic moduli of the suspended membranes are significantly higher than those of corresponding on-substrate thin films. We observed a reduction in net stress after the fabrication of suspended membrane, which is explained by estimating the thermal stress and intrinsic stress. We also use a mathematical model to study the stress and thickness-dependent elastic modulus of the ultrathin membranes. Lastly, we study the capillary force-gradient between the SiNx suspended membrane-Si substrate that could collapse the suspended membrane.

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Park, Sung-Joon, Won-Gi Ahn, Wansuk Choi, Sang-Hee Park, Jong Suk Lee, Hyun Wook Jung et Jung-Hyun Lee. « A facile and scalable fabrication method for thin film composite reverse osmosis membranes : dual-layer slot coating ». Journal of Materials Chemistry A 5, n^o 14 (2017) : 6648–55. http://dx.doi.org/10.1039/c7ta00891k.

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Lu, Zhengmao, Kyle L. Wilke, Daniel J. Preston, Ikuya Kinefuchi, Elizabeth Chang-Davidson et Evelyn N. Wang. « An Ultrathin Nanoporous Membrane Evaporator ». Nano Letters 17, n^o 10 (27 septembre 2017) : 6217–20. http://dx.doi.org/10.1021/acs.nanolett.7b02889.

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Shin, Min-Gyu, Wansuk Choi et Jung-Hyun Lee. « Highly Selective and pH-Stable Reverse Osmosis Membranes Prepared via Layered Interfacial Polymerization ». Membranes 12, n^o 2 (27 janvier 2022) : 156. http://dx.doi.org/10.3390/membranes12020156.

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Ultrathin and smooth polyamide (PA) reverse osmosis (RO) membranes have attracted significant interest due to their potential advantages of high permeance and low fouling propensity. Although a layered interfacial polymerization (LIP) technique aided by the insertion of a polyelectrolyte interlayer has proven effective in fabricating ultrathin and uniform membranes, the RO performance and pH stability of the fabricated LIP membrane remain inadequate. In this study, a poly(piperazineamide) (PIPA) layer prepared via interfacial polymerization (IP) was employed as an interlayer to overcome the limitations of the prototype LIP method. Similar to the control polyelectrolyte-interlayered LIP membrane, the PIPA-interlayered LIP (pLIP) membrane had a much thinner (~20 nm) and smoother selective layer than the membrane fabricated via conventional IP due to the highly surface-confined and uniform LIP reaction. The pLIP membrane also exhibited RO performance exceeding that of the control LIP and conventional IP-assembled membranes, by enabling denser monomer deposition and a more confined interfacial reaction. Importantly, the chemically crosslinked PIPA interlayer endowed the pLIP membrane with higher pH stability than the control polyelectrolyte interlayer. The proposed strategy enables the fabrication of high-performance and pH-stable PA membranes using hydrophilic supports, which can be applied to other separation processes, including osmosis-driven separation and organic solvent filtration.

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Li, Hang, Zhuonan Song, Xiaojie Zhang, Yi Huang, Shiguang Li, Yating Mao, Harry J. Ploehn, Yu Bao et Miao Yu. « Ultrathin, Molecular-Sieving Graphene Oxide Membranes for Selective Hydrogen Separation ». Science 342, n^o 6154 (3 octobre 2013) : 95–98. http://dx.doi.org/10.1126/science.1236686.

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Ultrathin, molecular-sieving membranes have great potential to realize high-flux, high-selectivity mixture separation at low energy cost. Current microporous membranes [pore size < 1 nanometer (nm)], however, are usually relatively thick. With the use of current membrane materials and techniques, it is difficult to prepare microporous membranes thinner than 20 nm without introducing extra defects. Here, we report ultrathin graphene oxide (GO) membranes, with thickness approaching 1.8 nm, prepared by a facile filtration process. These membranes showed mixture separation selectivities as high as 3400 and 900 for H2/CO2 and H2/N2 mixtures, respectively, through selective structural defects on GO.

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Thèses sur le sujet "Ultrathin Membrane"

Yun, Samhun. « Fabrication of Ultrathin Palladium Composite Membranes by a New Technique and Their Application in the Ethanol Steam Reforming for H₂ Production ». Diss., Virginia Tech, 2011. http://hdl.handle.net/10919/37505.

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This thesis describes a new technique for the preparation of ultrathin Pd based membranes supported on a hollow-fiber α-alumina substrate for H₂ separation. The effectiveness of the membranes is demonstrated in the ethanol steam reforming (EtOH SR) reaction in a membrane reactor (MR) for H₂ production. The membrane preparation technique uses an electric-field to uniformly deposit Pd nanoparticle seeds on a substrate followed by deposition of Pd or Pd-Cu layers on the activated surface by electroless plating (ELP). The well distributed Pd nanoparticles allow for enhanced bonding between the selective layer and the substrate and the formation of gas tight and thermally stable Pd or Pd-Cu layers as thin as 1 µm, which is a record in the field. The best Pd membrane showed H₂ permeance as high as 5.0 × 10⁶ mol m²s⁻¹Pa⁻¹ and stable H²/N₂ selectivity of 9000 - 7000 at 733 K for 5 days. The Pd-Cu alloy membrane showed H₂ permeance of 2.5 × 10⁶ mol m⁻²s⁻¹Pa⁻¹ and H₂/N₂ selectivity of 970 at the same conditions. The reaction studies were carried out with a Co-Na/ZnO catalyst both in a packed bed reactor (PBR) and in a MR equipped with the Pd or Pd-Cu membrane to evaluate the benefits of employing membranes. For all studies, ethanol conversion and hydrogen product yields were significantly higher in the MRs compared to the PBR. Average ethanol conversion enhancement and hydrogen molar flow enhancement were measured to be 12 % and 11 % in the Pd MR and 22 % and 19 % in the Pd-Cu MR, respectively. These enhancements of the conversion and product yield can be attributed to the shift in reaction equilibria by continuous hydrogen removal by the Pd based membranes. The comparative low enhancement in the Pd MR was found to be the result of significant contamination of Pd layer by CO or carbon compounds deposition during the reaction. A one-dimensional modeling of the MR and the PBR was conducted using identical conditions and their performances were compared with the values obtained from the experimental study. The model was developed using a simplified power law and the predicted values matched experimental data with only minor deviations indicating that the model was capturing the essential physicochemical behavior of the system. Enhancements of ethanol conversion and hydrogen yield were observed to increase with rise in space velocity (SV), which could be explained by the increase in H₂ flux through the membranes with SV in the MRs.
Ph. D.

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Cothren, Joshua E. « DEVELOPMENT OF TECHNIQUES AND INSTRUMENTATION FOR IN-SITU IMAGING AND SPECTROCSOPY OF WORKING NANODEVICES USING ULTRATHIN MEMBRANE ENVIRONMENTAL CELLS ». OpenSIUC, 2011. https://opensiuc.lib.siu.edu/theses/603.

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Here we report on a development of a device for in situ observation and spectroscopic study of the solid-liquid electrolyte interfacial processes taking place in electrochemical cell using Scanning Electron Microscopy (SEM), as well as optical microscopy. The major components of the device are a 50 nm Si3N4 membrane used for mounting the nanowire working electrodes and imaging their surfaces, a modified chip carrier for mounting the membrane and containing the liquid electrolyte and a glass lid for sealing the entire package. For preliminary testing we used individual SnO2 nanowires as working electrodes and a 10-3 M aqueous solution of AgNO3 as a model electrolyte. Vacuum tests were performed to ensure that the package is compatible with the high vacuum environment of the SEM. Finally, cyclic voltammograms were carried out and the growth of dendrimeric silver structures is observed as they form on the surface of the nanowires, which can be confirmed using Electron Dispersive Spectroscopy (EDS)

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Uehara, Thiers Massami. « Estudo da interação de nanomateriais com modelos de membranas celulares e com células-tronco neurais ». Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/18/18158/tde-27102014-134646/.

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O desenvolvimento da nanociência e nanotecnologia promoveu uma nova fronteira no estudo da matéria, permitindo que materiais já conhecidos tivessem suas propriedades redescobertas ao serem manipulados em nível molecular. Vários materiais vêm apresentando relevância na nanociência e nanotecnologia, como os nanotubos de carbono (CNTs), nanopartículas (NPs) e óxido de grafeno, uma vez que os CNTs e óxido de grafeno são dotados de propriedades mecânicas, térmicas e elétricas que os tornam apropriados para o desenvolvimento e a aplicação em dispositivos, especialmente na área biotecnológica e de sensores. Diversas áreas se beneficiam com o uso da tecnologia em nanopartículas (NPs), por exemplo: alimentícia, médica, agronegócio, cosmética, etc. Uma possível perspectiva na utilização desses nanomateriais em sistemas biológicos torna muito interessante investigar como tais materiais interagem em nível molecular com modelos de membranas celulares e com células. Esta tese tem como objetivos: i) investigar detalhadamente a interação entre nanopartículas (Fe3O4/Dextran; Fe3O4/PDAC; PDAC; Dextran) e nanotubos de carbono com modelos de membranas celulares; e ii) desenvolver nanofibras poliméricas pela técnica de electrospinning para ser utilizada com óxido de grafeno como modelos mimetizados (scaffolds) para a diferenciação de células-tronco neurais. Os filmes ultrafinos foram fabricados utilizando as técnicas de Langmuir e Langmuir-Blodgett. Esses nanomateriais foram avaliados através da técnica de Espectroscopia vibracional por Geração de Soma de Frequências. A espectroscopia SFG é sensível a interfaces. Nanofibras de Poli(ε-Caprolactone) foram fabricadas pela técnica de electrospinning. Scaffolds com óxido de grafeno/Nanofibras de Poli(ε-Caprolactone) foram desenvolvidos como suportes sólidos para a diferenciação de células-tronco neurais de rato. Óxido de grafeno em diferentes concentrações foi incorporado nas nanofibras poliméricas. Os modelos deste sistema foram investigados por imagens de Microscopia Eletrônica de Varredura. Os resultados mostraram que a carga eletrostática de cada fosfolipídio utilizado pode influenciar nas interações com os nanomateriais (nanopartículas ou nanotubos de carbono), podendo resultar em uma desestruturação no modelo de membrana celular. Scaffolds contendo nanofibras de Poli(ε-Caprolactone) com óxido de grafeno representaram um eficiente modelo mimetizado para a interação/diferenciação de células-tronco neurais de rato conforme revelado por imagens de Microscopia Eletrônica de Varredura. Estas imagens mostraram que o sistema de nanofibras de Poli(ε-Caprolactone) com 1,0 mg/mL de óxido de grafeno foram ideais para a diferenciação de oligodendrócitos em células-tronco neurais de rato.
The development of nanoscience and nanotechnology promoted a new frontier on the study of matter, allowing conventional materials to exhibit novel or improved properties. Several materials show relevance in nanoscience and nanotechnology, such as carbon nanotubes (CNTs), nanoparticles (NPs) and graphene oxide. CNTs and graphene oxide, for example, exhibit unique mechanical, thermal and electrical properties, which make them appropriate to the development and application in devices, especially in biotechnology and sensors areas. Many areas are benefited from the use of nanoparticles (NPs), such as food, medical, agrobusiness, cosmetic etc. The perspective regarding the use of nanomaterials in biological systems requires the understanding on how these materials interact at the molecular level with cell membrane models and with cells. The objectives of this thesis are: i) to investigate the interaction between nanoparticles (Fe3O4/Dextran; Fe3O4/PDAC; PDAC; Dextran) and carbon nanotubes with cell membrane models; and ii) to develop polymeric nanofibers via electrospinning technique, to be used with graphene oxide as mimic models (scaffolds) in the differentiation of neural stem cells. The cell membrane models were manufactured using Langmuir and Langmuir-Blodgett techniques. These nanomaterials were evaluated through Sum Frequency Vibrational Spectrosocopy (SFG). Poly(ε-Caprolactone) nanofibers were manufactured by electrospinning technique. Scaffolds with graphene oxide/Poly(ε-Caprolactone) were developed as solid supports for differentiation of rats neural stem cells. This biosystem was investigated via Scanning Electron Microscopy and biochemical essays. The results showed that the charge of each phospholipid influenced the interactions with the nanomaterials (nanoparticles or carbon nanotubes), in some cases, resulting in a disruption of the cell membrane model. Scaffolds with Poly(ε-Caprolactone) nanofibers obtained via electrospinning with graphene oxide represented an efficient mimic model for interaction/differentiation of neural stem cells as shown via Scanning Electron Microscopy. The images revealed that the PCL nanofibers system with 1.0 mg/mL of graphene oxide were ideal to the differentiation of oligodendrocytes in neural stem cells.

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Al-Haddad, Ahmed Sukur Hameed Verfasser], Yong [Akademischer Betreuer] Lei, Michael [Gutachter] [Köhler et Pu-Xian [Gutachter] Gao. « Large area of ultrathin alumina membranes toward innovative heterogeneous nanostructure arrays for solar energy conversion / Ahmed Sukur Hameed Al-Haddad ; Gutachter : Michael Köhler, Pu-Xian Gao ; Betreuer : Yong Lei ». Ilmenau : TU Ilmenau, 2016. http://d-nb.info/1178171981/34.

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Al-Haddad, Ahmed [Verfasser], Yong [Akademischer Betreuer] Lei, Michael [Gutachter] Köhler et Pu-Xian [Gutachter] Gao. « Large area of ultrathin alumina membranes toward innovative heterogeneous nanostructure arrays for solar energy conversion / Ahmed Sukur Hameed Al-Haddad ; Gutachter : Michael Köhler, Pu-Xian Gao ; Betreuer : Yong Lei ». Ilmenau : TU Ilmenau, 2016. http://nbn-resolving.de/urn:nbn:de:gbv:ilm1-2016000479.

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Al-Haddad, Ahmed [Verfasser], Yong Akademischer Betreuer] Lei, Michael [Gutachter] [Köhler et Pu-Xian [Gutachter] Gao. « Large area of ultrathin alumina membranes toward innovative heterogeneous nanostructure arrays for solar energy conversion / Ahmed Sukur Hameed Al-Haddad ; Gutachter : Michael Köhler, Pu-Xian Gao ; Betreuer : Yong Lei ». Ilmenau : TU Ilmenau, 2016. http://d-nb.info/1178171981/34.

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Favuzza, Eleonora. « Ultrathin Descemet stripping automated endothelial keratoplasty versus Descemet membrane endothelial keratoplasty : a fellow-eye comparison ». Doctoral thesis, 2020. http://hdl.handle.net/2158/1191084.

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In the past decade endothelial keratoplasty has become the gold standard for the treatment of endothelial dysfunctions, such as Fuchs endothelial dystrophy or pseudophakic bullous keratopathy. More recently a new procedure that allows us to selectively transplant only the Descemet membrane and the endothelium, Descemet Membrane Endothelial Keratoplasty (DMEK), has been developed; this technique is a refinement of Descemet stripping automated endothelial keratoplasty (DSAEK), where a relatively thick graft composed of endothelium, Descemet membrane and a variable portion of posterior stroma is transplanted. Due to its quicker postoperative recovery and similar or better visual outcome and lower rejection rates, DMEK has rapidly gained popularity, even though its widespread adoption is still limited by the difficult and less predictable surgical technique that prevents its use in complicated cases, and by its higher rates of postoperative rebubbling. Nevertheless, recently-published studies suggest that DSAEK grafts thinner than 130 µm (ultrathin, UT-DSAEK) may lead to postoperative visual outcomes which are better than conventional DSAEK and comparable to DMEK. In this context, the purpose of the study was to retrospectively compare the visual outcome and patients’ satisfaction after ultrathin Descemet stripping automated endothelial keratoplasty (UT-DSAEK) and Descemet membrane endothelial keratoplasty (DMEK) performed on the fellow eyes of the same patients.

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Huang, Bo-Song, et 黃柏淞. « Ultrathin InGaN Light-Emitting Membranes ». Thesis, 2016. http://ndltd.ncl.edu.tw/handle/59049063619658877916.

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碩士
國立中興大學
材料科學與工程學系所
104
In this study, GaN-based light-emitting diodes (LEDs) were lifted-off as a light-emitting diodes membranes by electrochemical wet etching technique. The heavy Si-doped GaN:Si sacrificial layer was inserted into the InGaN LED structure that the lateral wet etching rate had been enhanced. The ITO/Ti/Au layers deposited on p-GaN:Mg layer acted the protection layer and provided the mechanical strain during the lift-off processes. In the Raman spectra, the Raman peak of the NM-LED was observed at 566.3 cm-1 that had a 5.2 cm-1 shifted compared with the non-treated ST-LED (571.5cm-1). In the photoluminescence spectra, the peak wavelength of the NM-LED had a 4.0nm blueshifted compared to the ST-LED. The electroluminescence　spectra were measured at 529.9nm for ST-LED and 524.4nm for the NM-LED, respectively. The divergent angle of the NM-LED was 97° that was narrowed compared with the ST-LED (113°).

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Hendel, Robert A. « Ultrathin calix[n]arene-based Langmuir-Blodgett films for gas separations / ». Diss., 1998. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:9914245.

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Baskoro, Febri, et Febri Baskoro. « Fabrication of ultrathin graphene oxide composite membranes for water purification ». Thesis, 2016. http://ndltd.ncl.edu.tw/handle/00581570553536367376.

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Livres sur le sujet "Ultrathin Membrane"

Ultrathin Electrochemical Chemo- and Biosensors : Technology and Performance (Springer Series on Chemical Sensors and Biosensors). Springer, 2004.

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Chapitres de livres sur le sujet "Ultrathin Membrane"

Uemura, T., et T. Inoue. « Electronmicroscopic Study of Ultrathin Solute Barrier Layer of Composite Membranes and their Solute Transport Phenomena by the Addition of Alkali Metal Salts ». Dans Membranes and Membrane Processes, 379–86. Boston, MA : Springer US, 1986. http://dx.doi.org/10.1007/978-1-4899-2019-5_39.

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Ciobanu, Vladimir, I. Plesco, T. Braniste, G. Ceccone, P. Colpo et I. Tiginyanu. « GaN Ultrathin Membrane for SERS Detection of Rhodamine B ». Dans IFMBE Proceedings, 602–9. Cham : Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-92328-0_77.

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Hachisuka, Hisao, Tomomi Ohara et Kenichi Ikeda. « A New Type of Asymmetric Polyimide Gas Separation Membrane Having Ultrathin Skin Layer ». Dans ACS Symposium Series, 65–78. Washington, DC : American Chemical Society, 1999. http://dx.doi.org/10.1021/bk-2000-0744.ch004.

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Deetz, David W. « Stabilized Ultrathin Liquid Membranes for Gas Separations ». Dans Liquid Membranes, 152–65. Washington, DC : American Chemical Society, 1987. http://dx.doi.org/10.1021/bk-1987-0347.ch011.

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Knoll, Wolfgang, Kenichi Morigaki, Renate Naumann, Barbara Saccà, Stefan Schiller et Eva-Kathrin Sinner. « Functional Tethered Bilayer Lipid Membranes ». Dans Ultrathin Electrochemical Chemo- and Biosensors, 239–53. Berlin, Heidelberg : Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-662-05204-4_10.

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Hianik, Tibor. « Electrostriction of Supported Lipid Membranes and Their Application in Biosensing ». Dans Ultrathin Electrochemical Chemo- and Biosensors, 293–330. Berlin, Heidelberg : Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-662-05204-4_12.

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Sokolov, Valeri, et Vladimir Mirsky. « Electrostatic Potentials of Bilayer Lipid Membranes : Basic Principles and Analytical Applications ». Dans Ultrathin Electrochemical Chemo- and Biosensors, 255–91. Berlin, Heidelberg : Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-662-05204-4_11.

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Fendler, Klaus, Martin Klingenberg, Gerard Leblanc, Jan Joep H. H. M. DePont, Bela Kelety, Wolfgang Dörner et Ernst Bamberg. « Transport Proteins on Solid-Supported Membranes : From Basic Research to Drug Discovery ». Dans Ultrathin Electrochemical Chemo- and Biosensors, 331–49. Berlin, Heidelberg : Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-662-05204-4_13.

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Martin, Charles R., Barbara Ballarin, Charles Brumlik et Del R. Lawson. « Biosensors Based on Ultrathin Film Composite Membranes ». Dans ACS Symposium Series, 158–68. Washington, DC : American Chemical Society, 1994. http://dx.doi.org/10.1021/bk-1994-0556.ch013.

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Sotomayor Torres, Clivia M., Francesc Alzina, Andrey Shchepetov, Emigdio Chavez-Angel, John Cuffe, Bartlomiej Graczykowski, Mika Prunnila, Juan Sebastian Reparaz et Jouni Ahopelto. « Acoustic Phonons in Ultrathin Free-Standing Silicon Membranes ». Dans Silicon Nanomembranes, 305–26. Weinheim, Germany : Wiley-VCH Verlag GmbH & Co. KGaA, 2016. http://dx.doi.org/10.1002/9783527691005.ch12.

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Actes de conférences sur le sujet "Ultrathin Membrane"

Greschner, J., T. Bayer, S. Kalt, H. Weiss, Phillip L. Reu, Roxann L. Engelstad, Obert R. Wood II et al. « Ultrathin-membrane EPL masks ». Dans 19th European Conference on Mask Technology for Integrated Circuits and Microcomponts, sous la direction de Uwe F. W. Behringer. SPIE, 2003. http://dx.doi.org/10.1117/12.515090.

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Scott, Orion N., Hilary Bart-Smith, Matthew R. Begley et Michael H. Jones. « Elastomer membrane actuators utilizing ultrathin metal electrodes ». Dans Smart Structures and Materials, sous la direction de Yoseph Bar-Cohen. SPIE, 2006. http://dx.doi.org/10.1117/12.658713.

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Burgin, Tucker, Dean Johnson, Henry Chung, Alfred Clark et James McGrath. « Ultrathin Silicon Membranes for Improving Extracorporeal Blood Therapies ». Dans ASME 2016 14th International Conference on Nanochannels, Microchannels, and Minichannels collocated with the ASME 2016 Heat Transfer Summer Conference and the ASME 2016 Fluids Engineering Division Summer Meeting. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/icnmm2016-8052.

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Extracorporeal blood therapies such as hemodialysis and extracorporeal membrane oxygenation supplement or replace organ function by the exchange of molecules between blood and another fluid across a semi-permeable membrane. Traditionally, these membranes are made of polymers with large surface areas and thicknesses on the scale of microns. Therapeutic gas exchange or toxin clearance in these devices occurs predominantly by diffusion, a process that is described by an inverse square law relating a distance to the average time a diffusing particle requires to travel that distance. As such, small changes in membrane thickness or other device dimensions can have significant effects on device performance — and large changes can cause dramatic paradigm shifts. In this work, we discuss the application of ultrathin nanoporous silicon membranes (nanomembranes) with thicknesses on the scale of tens of nanometers to diffusion-mediated medical devices. We discuss the theoretical consequences of nanomembrane medical devices for patients, analyzing several notable benefits such as reduced device size (enabling wearability, for instance) and improved clearance specificity. Special attention is paid to computational and analytical models that describe real experimental behavior, and that in doing so provide insights into the relevant parameters governing the devices.

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Smith, Karl J. P., Joshua Winans et James McGrath. « Ultrathin Membrane Fouling Mechanism Transitions in Dead-End Filtration of Protein ». Dans ASME 2016 14th International Conference on Nanochannels, Microchannels, and Minichannels collocated with the ASME 2016 Heat Transfer Summer Conference and the ASME 2016 Fluids Engineering Division Summer Meeting. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/icnmm2016-7989.

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Ultrathin membranes will likely see great utility in future membrane-based separations, but key aspects of the performance of these membranes, especially when they are used to filter protein, remain poorly understood. In this work we perform protein filtrations using new nanoporous silicon nitride (NPN) membranes. Several concentrations of protein are filtered using dead end filtration in a benchtop centrifuge, and we track fouling based on the amount of filtrate passed over time. A modification of the classic fouling model that includes the effects of using a centrifuge and allow for the visualization of a transition between pore constriction and cake filtration demonstrate that for a range of protein concentrations, cake filtration supersedes pore constriction after ∼30 seconds at 690 g.

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Condori Quispe, Hugo O., Ashish Chanana, Ajay Nahata, Berardi Sensale-Rodriguez, Jimy Encomendero, Mingda Zhu, Debdeep Jena, Huili Grace Xing et Nicole Trometer. « Synchronized Plasma Wave Resonances in Ultrathin-Membrane GaN Heterostructures ». Dans 2018 43rd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz 2018). IEEE, 2018. http://dx.doi.org/10.1109/irmmw-thz.2018.8510459.

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Liu, Runkeng, et Zhenyu Liu. « Enhanced Mechanism of Water Evaporation Through Nanoporous Membrane ». Dans ASME 2021 Heat Transfer Summer Conference collocated with the ASME 2021 15th International Conference on Energy Sustainability. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/ht2021-61719.

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Abstract Evaporation through nanoporous membrane has attracted tremendous research attention as a ubiquitous natural phenomenon, which can be used in numerous applications. In this work, we explored the ultrathin water film evaporation process on nanoporous membrane based on non-equilibrium molecular dynamics simulation. A heat localization design of multilayer graphene coated at the bottom of membrane was implemented to reduce the heat loss along the non-evaporation direction. The underlying mechanism of water evaporation through nanoporous membrane was investigated after analysis of the average number of hydrogen bonds per water molecule, the temperature variation and the mean squared displacement of water molecular during the evaporation process. The results showed that the change of pore size will affect the water molecules structure. We also discussed the effect of heat localization design on ultrathin water film evaporation process. The result suggested that water molecules are more active and evaporation efficiency is improved correspondingly. This work reveals the feasibility of the novel nanoporous membrane structure design for enhancing heat and mass transfer, which can be adopted in efficient thermal management and low-cost approaches for water desalination.

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Chowdhury, P., S. Boominatha Sellarajan, M. Krishnan et H. C. Barshilia. « Fabrication of magnetic nanodot arrays using ultrathin alumina membrane (UTAM) ». Dans SOLID STATE PHYSICS : Proceedings of the 56th DAE Solid State Physics Symposium 2011. AIP, 2012. http://dx.doi.org/10.1063/1.4710027.

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Ohmichi, E., H. Takahashi, T. Okamoto, D. Hachiya et H. Ohta. « Terahertz Electron Paramagnetic Resonance Spectroscopy Using an Ultrathin Membrane Device ». Dans 2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz). IEEE, 2019. http://dx.doi.org/10.1109/irmmw-thz.2019.8874474.

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Gerwert, Klaus, Georg Souvignier et Benno Hess. « Timeresolved FTIR Difference Spectroscopy Applied To Ultrathin Layers Of Membrane Proteins ». Dans Intl Conf on Fourier and Computerized Infrared Spectroscopy, sous la direction de David G. Cameron. SPIE, 1989. http://dx.doi.org/10.1117/12.969390.

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Tiwari, Pragya, Puspen Mondal et A. K. Srivastava. « Fabrication of soft x-ray Fresnel zone plate on ultrathin membrane ». Dans DAE SOLID STATE PHYSICS SYMPOSIUM 2015. Author(s), 2016. http://dx.doi.org/10.1063/1.4947821.

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Rapports d'organisations sur le sujet "Ultrathin Membrane"

Martin, Charles R., Barbara Ballarin, Charles J. Brumlik et Del R. Lawson. Biosensors Based on Ultrathin Film Composite Membranes. Fort Belvoir, VA : Defense Technical Information Center, janvier 1994. http://dx.doi.org/10.21236/ada275542.

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Michl, J. Two-dimensional synthesis : Ultrathin porous membranes. Final report, December 1, 1993--November 30, 1996. Office of Scientific and Technical Information (OSTI), mai 1997. http://dx.doi.org/10.2172/503535.

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Lin, Xiao-Min, et Subramanian Sankaranarayanan. Ultrathin Nanoparticle Membranes to Remove Emerging Hydrophobic Trace Organic Compounds in Water with Low Applied Pressure and Energy Consumption. Office of Scientific and Technical Information (OSTI), février 2019. http://dx.doi.org/10.2172/1502835.

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