Pore size dependent dynamics of confined water probed by FIR spectroscopy

2010 ◽  
Vol 12 (26) ◽  
pp. 6928 ◽  
Author(s):  
Natalia Pérez-Hernández ◽  
Trung Quan Luong ◽  
Cirilo Pérez ◽  
Julio D. Martín ◽  
Martina Havenith
Keyword(s):  
Pore Size ◽  
Confined Water ◽  
Size Dependent

scholarly journals Pore Size-Dependent Structure of Confined Water in Mesoporous Silica Films from Water Adsorption/Desorption Using ATR–FTIR Spectroscopy

Langmuir ◽  
2019 ◽  
Vol 35 (37) ◽  
pp. 11986-11994 ◽  
Author(s):  
Bettina Baumgartner ◽  
Jakob Hayden ◽  
Jérôme Loizillon ◽  
Sophia Steinbacher ◽  
David Grosso ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Ftir Spectroscopy ◽  
Pore Size ◽  
Water Adsorption ◽  
Confined Water ◽  
Silica Films ◽  
Size Dependent ◽  
Adsorption Desorption

Pore-size dependent THz absorption of nano-confined water

2015 ◽  
Vol 40 (12) ◽  
pp. 2731 ◽  
Author(s):  
Chi-Kuang Sun ◽  
Borwen You ◽  
Yu-Ru Huang ◽  
Kao-Hsiang Liu ◽  
Shusaku Sato ◽  
...  
Keyword(s):  
Pore Size ◽  
Confined Water ◽  
Size Dependent ◽  
Thz Absorption

Transfer Technique for Electron Microscopy of Membrance Filter Samples

1974 ◽  
Vol 32 ◽  
pp. 554-555
Author(s):  
Lawrence W. Ortiz ◽  
Bonnie L. Isom
Keyword(s):  
Electron Microscopy ◽  
Electron Microscope ◽  
Pore Size ◽  
Membrane Filters ◽  
Size Dependent

A procedure is described for the quantitative transfer of fibers and particulates collected on membrane filters to electron microscope (EM) grids. Various Millipore MF filters (Millipore AA, HA, GS, and VM; 0.8, 0.45, 0.22 and 0.05 μm mean pore size) have been used with success. Observed particle losses have not been size dependent and have not exceeded 10%. With fibers (glass or asbestos) as the collected media this observed loss is approximately 3%.

Diverting the phase transition behaviour of adipic acid via mesoporous silica confinement

RSC Advances ◽  
2016 ◽  
Vol 6 (113) ◽  
pp. 111787-111796 ◽  
Author(s):  
Shang Liu ◽  
Guixiang Ma ◽  
Shaolei Xie ◽  
Yongzhong Jia ◽  
Jinhe Sun ◽  
...  
Keyword(s):  
Phase Transition ◽  
Mesoporous Silica ◽  
Pore Size ◽  
Thermal Behaviour ◽  
Adipic Acid ◽  
Size Dependent ◽  
Transition Behaviour

Phase transition regulation was achieved by imbibing adipic acid into mesoporous silica chambers, on the basis of pore size-dependent thermal behaviour.

On the concentration dependence of surface diffusion coefficients in capillary porous materials

1991 ◽  
Vol 434 (1891) ◽  
pp. 317-340 ◽  
Keyword(s):  
Experimental Data ◽  
Carbon Dioxide ◽  
Pore Size ◽  
Surface Diffusion ◽  
Diffusion Coefficients ◽  
Physical Adsorption ◽  
Structural Heterogeneity ◽  
Size Dependent ◽  
Chemical Potentials ◽  
Uniform Pore Size

The influence of structural heterogeneity, in the form of a non-uniform pore size distribution, on the isotherms and surface diffusion coefficients for monolayer physical adsorption is studied. A pore size dependent langmuirian isotherm is used along with consideration of equality of chemical potentials at the pore mouths at an intersection. The diffusion is modelled by a recently developed random walk formulation. It is found that the surface diffusion coefficients are strongly influenced by the heterogeneity and have a stronger increase with overall coverage than that predicted by the Darken equation. The results are found to match the experimental data of P. C. Carman and F. A. Raal on the diffusion of carbon dioxide in carbon black without the use of a fitting parameter.

scholarly journals Pore size dependent molecular adsorption of cationic dye in biomass derived hierarchically porous carbon

2017 ◽  
Vol 196 ◽  
pp. 168-177 ◽  
Author(s):  
Long Chen ◽  
Tuo Ji ◽  
Liwen Mu ◽  
Yijun Shi ◽  
Huaiyuan Wang ◽  
...  
Keyword(s):  
Pore Size ◽  
Porous Carbon ◽  
Molecular Adsorption ◽  
Cationic Dye ◽  
Hierarchically Porous ◽  
Size Dependent

A Pore-Size-Dependent Equation of State for Multilayer Adsorption in Cylindrical Mesopores

Langmuir ◽  
1999 ◽  
Vol 15 (10) ◽  
pp. 3632-3641 ◽  
Author(s):  
H. Y. Zhu ◽  
L. A. Ni ◽  
G. Q. Lu
Keyword(s):  
Equation Of State ◽  
Pore Size ◽  
Multilayer Adsorption ◽  
Size Dependent

scholarly journals Development of membrane in microfluidic device for sorting and detection for potential heterogeneity investigation

2021 ◽  
Author(s):  
Dehi Joung
Keyword(s):  
Pore Size ◽  
Mechanical Stability ◽  
Membrane Separation ◽  
Cross Flow ◽  
Polymeric Materials ◽  
Membrane Properties ◽  
Glycol Diacrylate ◽  
Recognition Element ◽  
Size Dependent ◽  
Biological Recognition

Membrane fabrication and integration with microfluidic devices has received increased attention for applications including bio-detection (a device providing analytical information in a selective and quantitative manner using a biological recognition element), membrane-based separation, and biological sample purification. The main challenges associated with these applications have been: 1) meeting sensitivity/selectivity requirements, 2) decreasing costs, 3) maintaining the mechanical stability of the membrane, 4) offering high throughput. Therefore, the main goal of this study was to demonstrate size-based membrane separation and bio-detection using double layer channel developed in our lab and to show how the membrane integrated channel can selectively separate rod shape cell separation with various aspect ratio based on size and enhance bio detection rate with flow. Based on an existing double-channel and cross-flow microfluidics platform, we explored various polymeric materials for fabricating porous membranes to use in pore-size-dependent separation. We induced pores via stop-flow lithography, and investigated membrane properties and limitations for pore-size-dependent separation. We investigated potential applications of poly(ethylene glycol) diacrylate (PEGDA)-based membrane integrated platforms in biological molecule detection based on streptavidin and biotin interaction. We demonstrated that flow and concentrations can enhance target detection in this platform.

scholarly journals Development of membrane in microfluidic device for sorting and detection for potential heterogeneity investigation

2021 ◽  
Author(s):  
Dehi Joung
Keyword(s):  
Pore Size ◽  
Mechanical Stability ◽  
Membrane Separation ◽  
Cross Flow ◽  
Polymeric Materials ◽  
Membrane Properties ◽  
Glycol Diacrylate ◽  
Recognition Element ◽  
Size Dependent ◽  
Biological Recognition

Membrane fabrication and integration with microfluidic devices has received increased attention for applications including bio-detection (a device providing analytical information in a selective and quantitative manner using a biological recognition element), membrane-based separation, and biological sample purification. The main challenges associated with these applications have been: 1) meeting sensitivity/selectivity requirements, 2) decreasing costs, 3) maintaining the mechanical stability of the membrane, 4) offering high throughput. Therefore, the main goal of this study was to demonstrate size-based membrane separation and bio-detection using double layer channel developed in our lab and to show how the membrane integrated channel can selectively separate rod shape cell separation with various aspect ratio based on size and enhance bio detection rate with flow. Based on an existing double-channel and cross-flow microfluidics platform, we explored various polymeric materials for fabricating porous membranes to use in pore-size-dependent separation. We induced pores via stop-flow lithography, and investigated membrane properties and limitations for pore-size-dependent separation. We investigated potential applications of poly(ethylene glycol) diacrylate (PEGDA)-based membrane integrated platforms in biological molecule detection based on streptavidin and biotin interaction. We demonstrated that flow and concentrations can enhance target detection in this platform.

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