Structural and morphological modification of PDMS thick film surfaces by ion implantation with the formation of strain-induced buckling domains

Winton, Brad; Ionescu, Mihail; Dou, Shi Xue; Wexler, David; Alvarez, G.

doi:10.1016/j.actamat.2009.11.029

Cited by 11 publications

(11 citation statements)

References 40 publications

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“…The main reason for this interest is that patterned surfaces are of particular importance for applications, such as cell culture 17, 79, 80, biological assays 15, 17, 40, elastomeric valves 81 and drug delivery 27, 36, 41. The first two parts of this section will discuss patterned PDMS surfaces in terms of topography 79, 82 and chemistry 15, 17, 30, 35, 40, 46, 80, respectively, and the third part will review the patterning of PDMS surfaces with nanomaterials.…”

Section: Patterned Pdms Surfacesmentioning

confidence: 99%

Surface modification for PDMS‐based microfluidic devices

et al. 2011

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This review focuses on advances reported from April 2009 to May 2011 in PDMS surface modifications for the application in microfluidic devices. PDMS surface modification techniques presented here include improved plasma and graft polymer coating, dynamic surfactant treatment, hydrosilylation-based surface modification and surface modification with nanomaterials such as carbon nanotubes and metal nanoparticles. Recent efforts to generate topographical and chemical patterns on PDMS are also discussed. The described surface modifications not only increase PDMS wettability, inhibit or reduce non-specific adsorption of hydrophobic species onto the surfaces in the act, but also result in the display of desired functional groups useful for molecular separations, biomolecular detection via immunoassays, cell culture and emulsion formation.

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Section: Patterned Pdms Surfacesmentioning

confidence: 99%

Surface modification for PDMS‐based microfluidic devices

et al. 2011

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“…Since all implanted metal ions behave similarly in inducing wrinkling, although with different wavelengths, results for iron implanted PDMS are shown hereafter for consistency. While it has already been shown that low energy ion implantation acts to decompose the surface of the elastomer to a silicon-and oxygen-rich stiff layer, thereby causing the wrinkling behavior due to strain mismatch, 27 this does not explain the difference in the sigmoidal-like behavior shown when different metal ions are implanted. It is speculated that the dependence of the PDMS wrinkle wavelength on the metal ion species is due to a metal-rich layer implanted into the elastomer matrix.…”

Section: Resultsmentioning

confidence: 93%

“…It is well known and has been demonstrated that V-shaped cracks tend to open up on the surface as a method of strain relief, and the frequency of these V-shaped cracks increases with the strain induced by increased implantation dose. 27 Over time, a wavelike regular pattern of undulations appears that is divided into complex coherent and semicoherent domains of various sizes and shapes. These different domains are due to the patterns established by the interference of the differing orientations of the waves that were formed [ Fig.…”

Section: Resultsmentioning

confidence: 99%

“…16 In previous work, we have shown that modification of the surface of a thick PDMS film with implanted metal ions can induce complex buckling patterns, while also elementally functionalizing the surface features. 27 Briefly, Rutherford backscattering spectroscopy (RBS) and grazing angle x-ray diffraction (XRD) conducted earlier confirmed that films exposed to metal ion implantation all have a silicon-and oxygen-rich layer at the surface, resulting from decomposition of the elastomer, down to varying thicknesses, depending on the dose and the metal ion species. This leads to the surface becoming covered by stress-induced V-shaped cracks that penetrate deeply into the elastomer matrix.…”

Section: Introductionmentioning

confidence: 99%

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The control of time-dependent buckling patterns in thin confined elastomer film

2010

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Low energy metal ion implantation has been used to combine an easy "bottom-up" way of creating and tuning different topographic structures on submicron to micrometer scales with the embedding of a metallic element-rich functionalized layer at the surface for a variety of scientific and technological applications. The self-organizing and complex patterns of functionalized topographic structures are highly dependent on the implanted metal ion species, variations in the geometric confinement of the buckled areas on the larger unmodified elastomer film, and the boundary conditions of the buckled regions. Systematic investigations of these dependencies have been carried out via optical and atomic force microscopy, and confirmed with crosssectional transmission electron microscopy. Low energy metal ion implantation has been used to combine an easy "bottom-up" way of creating and tuning different topographic structures on submicron to micrometer scales with the embedding of a metallic element-rich functionalized layer at the surface for a variety of scientific and technological applications. The self-organizing and complex patterns of functionalized topographic structures are highly dependent on the implanted metal ion species, variations in the geometric confinement of the buckled areas on the larger unmodified elastomer film, and the boundary conditions of the buckled regions. Systematic investigations of these dependencies have been carried out via optical and atomic force microscopy, and confirmed with cross-sectional transmission electron microscopy.

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“…• Direct UV lithography (no master), followed by chemical development [94] or reactive ion etching [95]. • Low-energy metal ion implantation (buckling of PDMS surface to produce organized 3D surface features) [96] and structured metal fi lms (formation of wavy corrugations of order dependent on the sputtered metal) [97].…”

Section: Surface Modifi Cationmentioning

confidence: 99%