Back-Surface Gold Mirrors for Vibrationally Resonant Sum-Frequency (VR-SFG) Spectroscopy Using 3-Mercaptopropyltrimethoxysilane as an Adhesion Promoter

Quast, Arthur D.; Zhang, Feng; Linford, Matthew R.; Patterson, James E.

doi:10.1366/11-06289

Cited by 16 publications

(14 citation statements)

References 23 publications

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“…Plasma systems, including those incorporated into heated chemical vapor deposition systems, are increasingly common. 1,7,23 Plasma cleaning may take place by the following possible processes: (i) A sputter-off mechanism, in which excited ions, electrons, or neutral atoms have sufficient energy to break bonds in the system, e.g., Si−C, Si−H, Si−O, C−C, or C−H bonds, leading to sputtering from the surface, (ii) an evaporative mechanism, in which plasma ions react with surface contaminants to form volatile products, e.g., CO 2 , O 2 , OH, etc., or (iii) a lift off mechanism, in which ions, electrons, or neutral atoms achieve sufficient energy to remove underlying oxide, which sweeps away organic contamination on top of it. 24 These mechanisms are not distinct, they usually take place simultaneously with one predominating.…”

Section: ■ Introductionmentioning

confidence: 99%

Hydrogen Plasma Treatment of Silicon Dioxide for Improved Silane Deposition

et al. 2013

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We describe a method for plasma cleaning silicon surfaces in a commercial tool that removes adventitious organic contamination and enhances silane deposition. As shown by wetting, ellipsometry, and XPS, hydrogen, oxygen, and argon plasmas effectively clean Si/SiO2 surfaces. However, only hydrogen plasmas appear to enhance subsequent low-pressure chemical vapor deposition of silanes. Chemical differences between the surfaces were confirmed via (i) deposition of two different silanes: octyldimethylmethoxysilane and butyldimethylmethoxysilane, as evidenced by spectroscopic ellipsometry and wetting, and (ii) a principal components analysis (PCA) of TOF-SIMS data taken from the different plasma-treated surfaces. AFM shows no increase in surface roughness after H2 or O2 plasma treatment of Si/SiO2. The effects of surface treatment with H2/O2 plasmas in different gas ratios, which should allow greater control of surface chemistry, and the duration of the H2 plasma (complete surface treatment appeared to take place quickly) are also presented. We believe that this work is significant because of the importance of silanes as surface functionalization reagents, and in particular because of the increasing importance of gas phase silane deposition.

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Section: ■ Introductionmentioning

confidence: 99%

Hydrogen Plasma Treatment of Silicon Dioxide for Improved Silane Deposition

et al. 2013

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“…We have developed backsurface mirrors that use 3-mercaptopropyltrimethoxysilane (MCPTMS) as a non-metallic adhesion promoter. 3 These mirrors are robust and, more importantly, the MCPTMS monolayer does not cause any distortion in the reference measurements. Strength Testing of Layered Polymers -We have also investigated the mechanical strength of layered polymers, with an initial focus on poly(methyl methacrylate) (PMMA) on PS.…”

Section: Summary Of Significant Resultsmentioning

confidence: 98%

“…Funding from AFOSR (YIP) commenced in March of 2009 and continued through May of 2012. We have published five papers [2][3][4][5][6] and submitted one other for publication 7 based on work supported at least in part by this funding. One doctoral student that was supported by this funding has completed his degree.…”

Section: Summary Of Significant Resultsmentioning

confidence: 99%

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Molecular Basis of Adhesion

Patterson¹

2012

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The public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing the burden, to the Department of Defense, Executive Services and Communications Directorate (0704-0188). Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number.

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“…Several methods to enhance the interfacial adhesion have been introduced using titanium (Ti) or chromium (Cr) as an adhesion interlayer [16,17] and thermally curing a prepolymer of PDMS on gold (Au) electrodes with a Ti interlayer [18]. However, Ti or Cr layers can affect the optical and electrochemical properties of the device and these materials are not suitable for bioapplications [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

MPTMS Treated Au/PDMS Membrane for Flexible and Stretchable Strain Sensors

Yang¹,

Lim²,

Jeon³

et al. 2016

Journal of Sensor Science and Technology

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Au/PDMS membranes are widely used to fabricate strain sensors which can detect input signals. An interfacial adhesion between metal films and polydimethylsiloxane (PDMS) substrates is one of the important factors determining the performance of strain sensors, in terms of robustness, reliability, and sensitivity. Here, we fabricate Au/PDMS membranes with (3-mercaptopropyl) trimethoxysilane (MPTMS) treatment. PDMS membranes were fabricated by spin-coating and the thickness was controlled by varying the spin rates. Au electrodes were deposited on the PDMS membrane by metal sputtering and the thickness was controlled by varying sputtering time. Owing to the MPTMS treatment, the interfacial adhesion between the Au electrode and the PDMS membrane was strengthened and the membrane was highly transparent. The Au electrode, fabricated with a sputtering time of 50 s, had the highest gauge factor at a maximum strain of ~0.7%, and the Au electrode fabricated with a sputtering time of 60 s had the maximum strain range among sputtering times of 50, 60, and 120 s. Our technique of using Au/PDMS with MPTMS treatment could be applied to the fabrication of strain sensors.

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Back-Surface Gold Mirrors for Vibrationally Resonant Sum-Frequency (VR-SFG) Spectroscopy Using 3-Mercaptopropyltrimethoxysilane as an Adhesion Promoter

Cited by 16 publications

References 23 publications

Hydrogen Plasma Treatment of Silicon Dioxide for Improved Silane Deposition

Hydrogen Plasma Treatment of Silicon Dioxide for Improved Silane Deposition

Molecular Basis of Adhesion

MPTMS Treated Au/PDMS Membrane for Flexible and Stretchable Strain Sensors

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