A sputter coater may be purchased that deposits single layers of gold, gold-palladium, tungsten, chromium, platinum, titanium, or other metals in a very controlled thickness pattern. It is possible, and desirable, to coat only a few nm’s of metal onto the sample surface.
Spin coating
Many polymer films are depositing via a spin coater which spins a substrate (often ITO glass) and drops of polymer liquid are dispersed an even thickness on top of the substrate.
Staining
Another option for polymer sample preparation is staining the sample. Stains act in different ways, but typical stains for polymers are osmium tetroxide (OsO
4 ), ruthenium tetroxide (RuO
4 ) phosphotungstic acid (H
3 PW
12 O
40 ), hydrazine (N
2 H
4 ), and silver sulfide (Ag
2 S).
Examples
Comb-block copolymer (microstructure of cast film)
Receive real-time job alerts and never miss the right job again
Source:
OpenStax, Physical methods in chemistry and nano science. OpenStax CNX. May 05, 2015 Download for free at http://legacy.cnx.org/content/col10699/1.21
Google Play and the Google Play logo are trademarks of Google Inc.
Notification Switch
Would you like to follow the 'Physical methods in chemistry and nano science' conversation and receive update notifications?