Try OctadecylTrichloroSilane (OTS) as reported by Whitesides, et al., at
Harvard and Clem, et al., at Illinois.  OTS is a long (18 member) carbon
chain attached to a SiCl3 "head."  The Cl react with surface hydroxyls on
the substrate (e.g., Si, glass) leaving the carbon chain sticking up away
from the surface.  The other end of the chain can be a methyl group (very
hydrophobic), or something else depending on what kind of functionality you
need.  These molecules self assemble as monolayers, and can be patterned
(see Clem, et al.), selectively functionalizing the subsrate surface.

Charles Lakeman,
TPL Inc.
3921 Academy Parkway North, NE
Albuquerque NM 87109
+1 505 342 4427 (Tel)
+1 505 343 1797 (FAX)


----- Original Message -----
From: "Satej Chaudhary" 
To: 
Sent: Tuesday, February 19, 2002 12:13 PM
Subject: [mems-talk] Hydrophobic surfaces


> hello,
>
> Could someone suggest a way to make a glass surface as
> hydrophobic like teflon? Teflon spin coating is too
> expensive. Has any body had success with chloro/fluoro
> organic polysiloxanes or silanes? I need a film that
> dosnt get too thick (a few ten Angstroms)
>
> Thankyou
> Satej Chaudhary
> Grad student
> University of Maryland
> Yahoo! Sports - Coverage of the 2002 Olympic Games
> http://sports.yahoo.com
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