Patterning of gold film on muscovite mica by using a helium-metastable atom beam and an octanethiol self-assembled monolayer

2003 ◽  
Vol 21 (6) ◽  
pp. 2478 ◽  
Author(s):  
X. Ju ◽  
M. Kurahashi ◽  
T. Suzuki ◽  
Y. Yamauchi
Keyword(s):  
Gold Film ◽  
Metastable Atom ◽  
Atom Beam ◽  
Self Assembled Monolayer ◽  
Muscovite Mica ◽  
Self Assembled

Gold Film Surface Preparation for Self-Assembled Monolayer Studies

Langmuir ◽  
2007 ◽  
Vol 23 (2) ◽  
pp. 509-516 ◽  
Author(s):  
Jing Kang ◽  
Paul A. Rowntree
Keyword(s):  
Gold Film ◽  
Film Surface ◽  
Surface Preparation ◽  
Self Assembled Monolayer ◽  
Self Assembled

Selective Surface Modification and Patterning on Self-Assembled Monolayers by a Micro-Plasma Discharge

2005 ◽  
Author(s):  
Jinan Chai ◽  
Baoming Li ◽  
Daniel Y. Kwok
Keyword(s):  
Gold Film ◽  
Argon Plasma ◽  
Plasma Discharge ◽  
Optical Microscope ◽  
Surface Patterning ◽  
Self Assembled Monolayers ◽  
Plasma Exposure ◽  
Self Assembled Monolayer ◽  
Assembled Monolayers ◽  
Self Assembled

In this paper, we will demonstrate a selective surface patterning method by a micro-plasma discharge. In this method, argon plasma is ignited through a hole of copper clad polyimide microstructure electrodes. As an illustration, experiments were performed in which an octadecanethiol (CH3(CH2)17SH) self-assembled monolayer (SAM) on a gold film is exposed to a microdischarge and subsequently followed by immersion into the 16-mercaptohexadecanoic acid (COOH(CH2)15SH) solution. The octadecanethiol SAM is desorbed upon Ar plasma exposure, allowing the formation of a second SAM on the damaged region [Chai et al, App. Phys. Lett., 86, 034107 (2005)]. The patterned samples are viewed by using optical microscope and scanning electron microscopy. The advantage of this approach is that it is noncontact and eliminates the need of photolithography. The patterned samples can be employed to microfluidic self-propelled movement.

CURRENT RECTIFICATION IN NEMATIC LIQUID CRYSTAL CELL WITH ALKANETHIOL SELF-ASSEMBLED MONOLAYER

2008 ◽  
Vol 17 (04) ◽  
pp. 495-501
Author(s):  
FENGFENG YAO ◽  
YANBO PEI ◽  
XIUDONG SUN
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Gold Film ◽  
Glass Slide ◽  
Self Assembled Monolayer ◽  
Coated Glass ◽  
Voltage Bias ◽  
Current Rectification ◽  
Self Assembled ◽  
Coated Glass Slide

Asymmetric current–voltage (I/V) behaviors with respect to the polarity of the voltage bias were observed in the nematic liquid crystal (NLC) cells constructed with the gold film on the silicon wafer as one substrate and an indium-tin-oxide (ITO)-coated glass slide as the other substrate. A little smaller current resulted at the positive bias corresponding to the positive voltage bias being applied to the gold film relative to the ITO-coated glass slide. When the alkanethiol self-assembled monolayer (SAM) was introduced into the above NLC cell as the aligning layer, it was able to enhance the forward current significantly, but suppress the reverse current. A current rectification ratio of ~20 was obtained at 1.5 V in the NLC cell with SAM as the aligning layer. Besides, we also characterized the effect of the optical power of 632.8 nm on the asymmetric I/V behaviors in the NLC cells without SAM and with SAM as the aligning layer.

Self-assembly of octadecyltrichlorosilane monolayers on mica

1990 ◽  
Vol 5 (8) ◽  
pp. 1745-1751 ◽  
Author(s):  
George A. Carson ◽  
Steve Granick
Keyword(s):  
Self Assembly ◽  
Surface Coverage ◽  
Self Assembled Monolayers ◽  
Self Assembled Monolayer ◽  
Surface Polymerization ◽  
Langmuir Blodgett ◽  
Assembled Monolayers ◽  
Langmuir Blodgett Films ◽  
Muscovite Mica ◽  
Self Assembled

A method is described to deposit a securely attached, self-assembled monolayer of octadecyltrichlorosilane (OTS) on the surface of freshly cleaved muscovite mica. Comparison of the infrared methylene spectra with those of closely packed Langmuir-Blodgett films implies that the surface coverage of the OTS films was a fraction 0.8–0.9 that of films formed by Langmuir-Blodgett (LB) methods. However, LB monolayers are less securely attached to the substrate. The contact angle of water on these self-assembled monolayers remained over 100° for over 24 h and it suffered no noticeable degradation after prolonged reflux in cyclohexane. The method to form an OTS monolayer on mica involves three steps; first, ion exchange of the native K+ ions of cleaved mica for H+ ions; second, control of the quantity of resulting water on the mica surface; third, adsorption and surface polymerization of octadecyltrichlorosilane (OTS) by self-assembly from dilute cyclohexane solution.

Self-Assembled Fluid Phase Floating Membranes with Tuneable Water Interlayers

2019 ◽  
Author(s):  
Luke Clifton ◽  
Nicoló Paracini ◽  
Arwel V. Hughes ◽  
Jeremy H. Lakey ◽  
Nina-Juliane Seinke ◽  
...  
Keyword(s):  
Fluid Phase ◽  
Interlayer Thickness ◽  
Supported Bilayers ◽  
Self Assembled Monolayer ◽  
High Coverage ◽  
Nano Technology ◽  
Surface Distance ◽  
Potential Applications ◽  
Self Assembled ◽  
Coated Surfaces

<p>We present a reliable method for the fabrication of fluid phase unsaturated bilayers which are readily self-assembled on charged self-assembled monolayer (SAM) surfaces producing high coverage floating supported bilayers where the membrane to surface distance could be controlled with nanometer precision. Vesicle fusion was used to deposit the bilayers onto anionic SAM coated surfaces. Upon assembly the bilayer to SAM solution interlayer thickness was 7-10 Å with evidence suggesting that this layer was present due to SAM hydration repulsion of the bilayer from the surface. This distance could be increased using low concentrations of salts which caused the interlayer thickness to enlarge to ~33 Å. Reducing the salt concentration resulted in a return to a shorter bilayer to surface distance. These accessible and controllable membrane models are well suited to a range of potential applications in biophysical studies, bio-sensors and Nano-technology.</p><br>

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