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Nanotribological characterization of vapor phase deposited fluorosilane self-assembled monolayers deposited on polydimethylsiloxane surfaces for biomedical micro-/nanodevices
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10.1116/1.2426979
/content/avs/journal/jvsta/25/4/10.1116/1.2426979
http://aip.metastore.ingenta.com/content/avs/journal/jvsta/25/4/10.1116/1.2426979

Figures

Image of FIG. 1.
FIG. 1.

(a) Chemical structures of fluorosilane films deposited on silanized samples. (b) Silanization of silicon and PDMS samples.

Image of FIG. 2.
FIG. 2.

Schematic of the apparatus for vapor phase deposition of self-assembled monolayers.

Image of FIG. 3.
FIG. 3.

Static contact angle values for various SAMs as a function of temperature, pressure, and deposition time for optimization of the process conditions. The contact angle for oxygen plasma treated PDMS is also shown.

Image of FIG. 4.
FIG. 4.

Typical values of rms surface roughness for oxygen plasma treated PDMS substrate and various SAMs.

Image of FIG. 5.
FIG. 5.

(a) Water contact angles and adhesive force and coefficient of friction measured using an AFM for untreated and oxygen plasma treated PDMS and various SAMs, and (b) friction force vs normal load plots for untreated and oxygen plasma treated PDMS and various SAMs. The coefficient of friction values for each sample are indicated in parentheses.

Image of FIG. 6.
FIG. 6.

(a) Dependence of the coefficient of friction on the relative humidity (RH) for untreated and oxygen plasma treated PDMS substrates and various SAMs, and (b) temperature dependence of the adhesive force.

Image of FIG. 7.
FIG. 7.

Dependence of the adhesive force on the sliding velocity for untreated and oxygen plasma treated PDMS substrates and various SAMs.

Image of FIG. 8.
FIG. 8.

Decrease in surface height as a function of normal load for untreated PDMS, Si(100), and PFDTES on both substrates after one scan cycle. Typical wear maps at selected loads are also shown.

Tables

Generic image for table
TABLE I.

Summary of optimum deposition condition (chamber pressure, chamber temperature, and deposition time), contact angle, adhesive force, and coefficient of friction for substrates and films.

Generic image for table
TABLE II.

Bond strengths of the chemical bonds in SAMs.

Generic image for table
TABLE III.

Material properties.

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/content/avs/journal/jvsta/25/4/10.1116/1.2426979
2007-07-03
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Nanotribological characterization of vapor phase deposited fluorosilane self-assembled monolayers deposited on polydimethylsiloxane surfaces for biomedical micro-/nanodevices
http://aip.metastore.ingenta.com/content/avs/journal/jvsta/25/4/10.1116/1.2426979
10.1116/1.2426979
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