POSS-based hybrid porous materials with exceptional hydrogen uptake at low pressure

2014 ◽  
Vol 193 ◽  
pp. 35-39 ◽  
Author(s):  
Zhijun Wei ◽  
Xuan Luo ◽  
Lin Zhang ◽  
Meiming Luo
Keyword(s):  
Porous Materials ◽  
Hydrogen Uptake ◽  
Low Pressure

Understanding the mechanism of hydrogen uptake at low pressure in carbon/palladium nanostructured composites

2011 ◽  
Vol 21 (44) ◽  
pp. 17765 ◽  
Author(s):  
Camelia Matei Ghimbeu ◽  
Claudia Zlotea ◽  
Roger Gadiou ◽  
Fermin Cuevas ◽  
Eric Leroy ◽  
...  
Keyword(s):  
Hydrogen Uptake ◽  
Low Pressure ◽  
Nanostructured Composites

scholarly journals Low pressure mediated enhancement of nanoparticle and macromolecule loading into porous silicon structures

2014 ◽  
Vol 1 (1) ◽  
Author(s):  
Fransisca Leonard ◽  
Katherine Margulis ◽  
Xuewu Liu ◽  
Srimeenakshi Srinivasan ◽  
Shlomo Magdassi ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Porous Materials ◽  
Biomedical Applications ◽  
Pore Diameter ◽  
Drug Loading ◽  
Low Pressure ◽  
Contrast Imaging ◽  
Therapeutic Molecules ◽  
Silicon Structures ◽  
The Difference

AbstractEnsuring drug loading efficiency and consistency is one of the most critical stages in engineering drug delivery vectors based on porous materials. Here we propose a technique to significantly enhance the effciency of loading by employing simple and widely available methods: applying low pressure with and without centrifugation. Our results point toward the advantages of the proposed method over the passive loading, especially when the difference between the dimensions of loaded materials and the pore diameter is small, an increase of up to 20-fold can be observed. The technique described in this study can be used for efficient and reproducible loading of porous materials with therapeutic molecules, nanoparticles and contrast imaging agents for biomedical applications.

Spiro(fluorene-9,9′-xanthene)-Based Porous Organic Polymers: Preparation, Porosity, and Exceptional Hydrogen Uptake at Low Pressure

2011 ◽  
Vol 44 (20) ◽  
pp. 7987-7993 ◽  
Author(s):  
Qi Chen ◽  
Jin-Xiang Wang ◽  
Qiu Wang ◽  
Ning Bian ◽  
Zhong-Hua Li ◽  
...  
Keyword(s):  
Hydrogen Uptake ◽  
Low Pressure ◽  
Organic Polymers ◽  
Porous Organic Polymers

Effects of Electrical Discharges in Low Pressure Gases on the Morphology of Polyethylene Crystals

1974 ◽  
Vol 32 ◽  
pp. 544-545
Author(s):  
L.H. Bolz ◽  
D.H. Reneker
Keyword(s):  
Power Distribution ◽  
Electrical Discharge ◽  
Dielectric Breakdown ◽  
Ionic Species ◽  
Low Pressure ◽  
Polymer Surfaces ◽  
Electrical Discharges ◽  
Adhesive Bonds ◽  
Power Distribution Lines ◽  
Modification Of The Surface

The attack, on the surface of a polymer, by the atomic, molecular and ionic species that are created in a low pressure electrical discharge in a gas is interesting because: 1) significant interior morphological features may be revealed, 2) dielectric breakdown of polymeric insulation on high voltage power distribution lines involves the attack on the polymer of such species created in a corona discharge, 3) adhesive bonds formed between polymer surfaces subjected to such SDecies are much stronger than bonds between untreated surfaces, 4) the chemical modification of the surface creates a reactive surface to which a thin layer of another polymer may be bonded by glow discharge polymerization.

Field ion microscopy

1988 ◽  
Vol 46 ◽  
pp. 434-435
Author(s):  
Gert Ehrlich
Keyword(s):  
Low Temperature ◽  
Sample Surface ◽  
Low Pressure ◽  
Radius Of Curvature ◽  
Field Ion Microscopy ◽  
Phosphor Screen ◽  
Ion Microscopy ◽  
Field Ion Microscope

The field ion microscope, devised by Erwin Muller in the 1950's, was the first instrument to depict the structure of surfaces in atomic detail. An FIM image of a (111) plane of tungsten (Fig.l) is typical of what can be done by this microscope: for this small plane, every atom, at a separation of 4.48Å from its neighbors in the plane, is revealed. The image of the plane is highly enlarged, as it is projected on a phosphor screen with a radius of curvature more than a million times that of the sample. Müller achieved the resolution necessary to reveal individual atoms by imaging with ions, accommodated to the object at a low temperature. The ions are created at the sample surface by ionization of an inert image gas (usually helium), present at a low pressure (< 1 mTorr). at fields on the order of 4V/Å.

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