Determination of pore size and shape distribution from porosimetric hysteresis curves

1972 ◽  
Vol 5 (6) ◽  
pp. 345-349 ◽  
Author(s):  
M. Svatá
Keyword(s):  
Pore Size ◽  
Hysteresis Curves ◽  
Shape Distribution ◽  
Size And Shape

scholarly journals On the Reaction Pathways and Growth Mechanisms of LiNbO3 Nanocrystals from the Non-Aqueous Solvothermal Alkoxide Route

Nanomaterials ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 154
Author(s):  
Mathias Urbain ◽  
Florian Riporto ◽  
Sandrine Beauquis ◽  
Virginie Monnier ◽  
Jean-Christophe Marty ◽  
...  
Keyword(s):  
Colloidal Stability ◽  
Formation Rate ◽  
Reaction Medium ◽  
Precursor Solution ◽  
Medium Composition ◽  
Shape Anisotropy ◽  
Reaction Pathways ◽  
Growth Mechanisms ◽  
Shape Distribution ◽  
Size And Shape

Phase-pure, highly crystalline sub-50 nm LiNbO3 nanocrystals were prepared from a non-aqueous solvothermal process for 72 h at 230 °C and a commercial precursor solution of mixed lithium niobium ethoxide in its parent alcohol. A systematic variation of the reaction medium composition with the addition of different amounts of co-solvent including butanol, 1,3-propanediol, 1,4-butanediol, and 1,5-pentanediol resulted in the formation of nanocrystals of adjustable mean size and shape anisotropy, as demonstrated from XRD measurements and TEM imaging. Colloidal stability of ethanol- and water-based suspensions was evaluated from dynamic light scattering (DLS)/zeta potential studies and correlated with FTIR data. Thanks to the evolution in the nanocrystal size and shape distribution we observed, as well as to the available literature on the alkoxide chemistry, the reaction pathways and growth mechanisms were finally discussed with a special attention on the monomer formation rate, leading to the nucleation step. The polar, non-perovskite crystalline structure of LiNbO3 was also evidenced to play a major role in the nanocrystal shape anisotropy.

Determination of the pore size of woven structures through image analysis

2012 ◽  
Vol 2 (1) ◽  
Author(s):  
R. Angelova
Keyword(s):  
Pore Size ◽  
Single Layer ◽  
Woven Fabric ◽  
Virtual Model ◽  
Experimental Procedure ◽  
Porosity And Permeability ◽  
Woven Structures ◽  
Woven Structure ◽  
Non Destructive

AbstractThe paper presents an experimental procedure developed for determination of the pore size, shape and distribution in a single layer woven fabric, for the construction of a virtual model to be incorporated in a future CFD software package. The procedure is based on non-destructive observation and analysis of woven samples. 14 different samples of gray fabrics of 100 % cotton in plain and twill weaves are investigated. The results obtained allow the creation of reality more realistic virtual model of the woven structure, and theoretical investigation of its porosity and permeability through computer simulation.

scholarly journals Simultaneous Measurements of K+ and Calcein Release from Liposomes and the Determination of Pore Size Formed in a Membrane

2007 ◽  
Vol 23 (5) ◽  
pp. 517-522 ◽  
Author(s):  
Takashi KATSU ◽  
Tomonori IMAMURA ◽  
Keiko KOMAGOE ◽  
Kazufumi MASUDA ◽  
Tohru MIZUSHIMA
Keyword(s):  
Pore Size ◽  
Simultaneous Measurements ◽  
Calcein Release
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