PELCO Hydrophilic and Hydrophobic Silicon Nitride Membrane Surfaces
15nm, 50nm and 200nm membrane thickness
Hydrophobic and Hydrophilic Silicon Nitride Membrane
Silicon Nitride membranes have been modified using Atomic Layer-Deposited (ALD) techniques to change their surface properties.
Depending on the process used, both Hydrophilic and Hydrophobic substrates have been created with the following advantages:
Hydrophobic surfaces improve sample preparation for materials that are dissolved or suspended in organics solvents.
Nanoparticles in organic solvents (such as carbon nanotubes) will readily disperse on the Silicon Nitride membrane surface.
Hydrophilic surfaces enhance wetting and dispersion of aqueous solutions. This avoids particle aggregation effects commonly observed on less hydrophilic surfaces. Particularly useful in water based sols and life science applications.
Both coatings are available on 50nm and 200nm PELCO Silicon Nitride Membranes with a 0.5 x 0.5mm window and 15nm Si3N4 membrane with 9 each 0.1 x 0.1nm windows on a 200 m silicon frame with a diameter of 3mm, compatible with all standard TEM grid holders. Both sides of the membrane and frame are coated.
We advise to handle the discs by gripping at the edge.
Specifications:
Hydrophilic: 2.5nm atomic layer-deposited hydroxylated alumina on 15, 50 and 200nm ultra-low-stress silicon nitride membrane
Hydrophobic: 2.5nm atomic layer-deposited alumina and fluoro-methyl-silane on 15, 50 and 200nm ultra-low-stress silicon nitride membrane
Surface Energy:
| Surface | Surface Energy (mJ/m2) | Standard Deviation |
| Silicon Nitride Membrane | 46.1 | 4.3 |
| Hydrophilic Coating | 76.1 | 2.2 |
| Hydrophobic Coating | 24.6 | 4.4 |
| mj= millijoules | ||
| Surface | Surface Roughness (nm) | Standard Deviation |
| Silicon Nitride Membrane | Rq=0.65 Ra=0.45 |
0.06 0.02 |
| Hydrophilic Coating | Rq=0.57 Ra=0.40 |
0.04 0.03 |
| Hydrophobic Coating | Rq=0.66 Ra=0.40 |
0.03 0.05 |
| Rq= Surface Roughness; Ra= Roughness Average | ||
| Art. | Description | Unit | Price | Quantity | |
|---|---|---|---|---|---|
| 21553-10 | PELCO Hydrophilic 15nm Silicon Nitride Membrane, 9 ea. 0.1×0.1mm Windows |
10 | € 427,80 | ||
| 21550-10 | PELCO Hydrophilic 50nm Silicon Nitride Membrane, 0.5 x 0.5mm Window |
10 | € 326,00 | ||
| 21551-10 | PELCO Hydrophilic 200nm Silicon Nitride Membrane, 0.5 x 0.5mm Window |
10 | € 282,50 | ||
| 21593-10 | PELCO Hydrophobic 15nm Silicon Nitride Membrane, 9 ea. 0.1 x 0.1mm Windows |
10 | € 427,80 | ||
| 21552-10 | PELCO Hydrophobic 50nm Silicon Nitride Membrane, 0.5 x 0.5mm Window |
10 | € 326,00 | ||
| 21591-10 | PELCO Hydrophobic 200nm Silicon Nitride Membrane, 0.5 x 0.5mm Window |
10 | € 282,50 |