Perfluorodecyltrichlorosilane

Perfluorodecyltrichlorosilane, also known as FDTS, is a colorless liquid chemical with molecular formula C10H4Cl3F17Si. FDTS molecules form self-assembled monolayers. They form covalent silicon–oxygen bonds to free hydroxyl (–OH) groups, such as the surfaces of glass, ceramics, or silica.

Perfluorodecyltrichlorosilane
FDTS molecule structural formula.svg
Names
IUPAC name
trichloro(3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-heptadecafluorodecyl)silane
Other names
FDTS; Perfluorodecyltrichlorosilane; Perfluorooctylethyltrichlorosilane; 1H,1H,2H,2H-PERFLUORODECYLTRICHLOROSILANE; TRICHLORO-1H,1H,2H,2H-PERFLUORODECYLSILANE;
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.110.513 Edit this at Wikidata
EC Number
  • 616-629-4
  • InChI=1S/C10H4Cl3F17Si/c11-31(12,13)2-1-3(14,15)4(16,17)5(18,19)6(20,21)7(22,23)8(24,25)9(26,27)10(28,29)30/h1-2H2
    Key: VIFIHLXNOOCGLJ-UHFFFAOYSA-N
  • InChI=1/C10H4Cl3F17Si/c11-31(12,13)2-1-3(14,15)4(16,17)5(18,19)6(20,21)7(22,23)8(24,25)9(26,27)10(28,29)30/h1-2H2
    Key: VIFIHLXNOOCGLJ-UHFFFAOYAV
  • C(C[Si](Cl)(Cl)Cl)C(C(C(C(C(C(C(C(F)(F)F)(F)F)(F)F)(F)F)(F)F)(F)F)(F)F)(F)F
Properties
CF
3
(CF
2
)7(CH
2
)2SiCl
3
Molar mass 581.556 [g/mol]
Appearance colourless liquid
Odor pungent, resembling HCl
Density 1.7 g/cm3
Boiling point 224 °C (435 °F; 497 K)
hydrolysis[1]
Solubility soluble in THF, THP, toluene, and other organic solvents[2]
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
Moisture sensitive
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Due to its heavily fluorinated tail group, a FDTS monolayer reduces surface energy. Deposition of a FDTS monolayer is achieved by a relatively simple process, also known as molecular vapor deposition (MVD) It usually deposits from a vapor phase, at room to near-to-room temperatures (50 °C) and is thus compatible with most substrates. The process is usually carried out in a vacuum chamber and assisted by the presence of water vapor. Treated surfaces have water repellent and friction reducing properties.

For this reason, a FDTS monolayer is often applied to movable microparts of microelectromechanical systems (MEMS).[3] A FDTS monolayer reduces surface energy and prevents sticking, so they are used to coat micro- and nano-features on stamps for a nanoimprint lithography which is becoming a method of choice for making electronics, organic photodiodes, microfluidics and other.

Reduced surface energy is helpful for reduction of ejection force and demolding of polymer parts in an injection molding and FDTS coating was applied[4] onto some metallic injection molding molds and inserts.

ReferencesEdit

  • Srinivasan, U.; Houston, M.R.; Howe, R.T.; Maboudian, R.; , "Alkyltrichlorosilane-based self-assembled monolayer films for stiction reduction in silicon micromachines," Microelectromechanical Systems, Journal of , vol.7, no.2, pp. 252–260, Jun 1998. doi: 10.1109/84.679393
  • Ruben B. A. Sharpe, Dirk Burdinski, Jurriaan Huskens, Harold J. W. Zandvliet, David N. Reinhoudt, and Bene Poelsema, Chemically Patterned Flat Stamps for Microcontact Printing, Journal of the American Chemical Society 2005 127 (29), 10344-10349.
  • Ashurst, W. R., Carraro, C., and Maboudian, R., “Vapor Phase Anti-Stiction Coatings for MEMS,” IEEE Transactions on Device and Materials Reliability, Vol. 3, No. 4, pp. 173–178, 2003. doi: 10.1109/TDMR.2003.821540
  1. ^ http://store.apolloscientific.co.uk/storage/msds/PC5979_msds.pdf[bare URL PDF]
  2. ^ http://www.apolloscientific.co.uk/downloads/msds/PC5979_msds.pdf[dead link]
  3. ^ Ashurst, W. R. (Dec 2003). "Vapor phase anti-stiction coatings for MEMS". IEEE Transactions on Device and Materials Reliability. 3 (4): 173–178. doi:10.1109/TDMR.2003.821540.
  4. ^ Cech J, Taboryski R (2012). "Stability of FDTS monolayer coating on aluminum injection molding tools". Applied Surface Science. 259: 538–541. doi:10.1016/j.apsusc.2012.07.078.