Engineering & Materials Science
Positron annihilation spectroscopy
100%
Silica
51%
Positron annihilation
29%
Spectroscopy
18%
Molecules
16%
Adsorption
16%
Silica gel
15%
Permeation
13%
Pore size
6%
Porosity
4%
Membranes
4%
Temperature
4%
Gases
3%
Physics & Astronomy
positron annihilation
53%
silicon dioxide
38%
porosity
32%
spectroscopy
26%
selectivity
15%
silica gel
14%
adsorption
12%
life (durability)
11%
molecules
8%
siloxanes
7%
assembling
6%
cut-off
4%
membranes
4%
temperature
3%
characterization
3%
gases
2%
performance
2%
Chemical Compounds
Positron Annihilation Spectroscopy
78%
Amorphous Material
34%
Pore
32%
Spectroscopy
16%
Porosity
14%
Adsorption
12%
Gel
10%
Molecule
8%
Siloxane
8%
Pore Size
7%
Diffusion
5%
Gas
4%