0
$\begingroup$

Let's say a solid is submerged in a solution of species with functional groups and a self-assembled monolayer is forming. What are the typical time scales for the formation of a continuous monolayer? (seconds, minutes, days..?)

enter image description here (source)

For an adsorbate in gaseous phase and high vacuum, a rough approximation on Wikipedia is ~1 sec.

$\endgroup$
1
$\begingroup$

Depends on concentration and other parameters. For thiols on gold, for example, a typical concentration is 1-5 mM, and formation time is 24-48 hours; "Longer assembly times tend to result in better monolayer packing." (ref)

$\endgroup$
  • $\begingroup$ To emphasize the variability: I do research where I use ethanethiol + mercaptoethanol to make a gold surface hydrogen-bonding or non-hydrogen-bonding. I dip the gold-coated material in pure thiol for 30sec. We haven't characterized the packing arrangement, but our materials are noticeably non-polar (ethanethiol) or polar (mercaptoethanol). $\endgroup$ – NMJD Dec 22 '16 at 3:16

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.