The effect of adhesion promoter on the adhesion of PDMS to different substrate materials

Kersey, Lance; Ebacher, Vincent; Bazargan, Vahid; Wang, Rizhi; Stoeber, Boris

doi:10.1039/b813757a

Cited by 43 publications

(20 citation statements)

References 6 publications

(8 reference statements)

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“…Often a stronger adhesion is needed for which a promoter can be used to increase the adhesion of PDMS to silicon, glass and aluminum. [ 99 ] In some cases, such as microfl uidic devices using high pressures in valves and pumps, surfaces are bonded irreversibly. PMMA and COC substrates are bonded at …”

Section: Packagingmentioning

confidence: 99%

Microfluidic Chips for Point‐of‐Care Immunodiagnostics

2011

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We might be at the turning point where research in microfluidics undertaken in academia and industrial research laboratories, and substantially sponsored by public grants, may provide a range of portable and networked diagnostic devices. In this Progress Report, an overview on microfluidic devices that may become the next generation of point-of-care (POC) diagnostics is provided. First, we describe gaps and opportunities in medical diagnostics and how microfluidics can address these gaps using the example of immunodiagnostics. Next, we conceptualize how different technologies are converging into working microfluidic POC diagnostics devices. Technologies are explained from the perspective of sample interaction with components of a device. Specifically, we detail materials, surface treatment, sample processing, microfluidic elements (such as valves, pumps, and mixers), receptors, and analytes in the light of various biosensing concepts. Finally, we discuss the integration of components into accurate and reliable devices.

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Section: Packagingmentioning

confidence: 99%

Microfluidic Chips for Point‐of‐Care Immunodiagnostics

2011

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“…This increase is also partly attributed to loss of a small percentage of Al lines during the transfer into PDMS. This loss can be mitigated through incorporation of an adhesion promoter such as, GE SS4120, at the Al/PDMS interface as demonstrated by . Figure (b) and (c) show the visual performance of the flexible, gas permeable and biocompatible NWGP for TM and TE polarizations respectively.…”

Section: Wire Grid Releasementioning

confidence: 99%

Nanowire Grid Polarizers Integrated into Flexible, Gas Permeable, Biocompatible Materials and Contact Lenses

Hollowell

Guo

2013

Advanced Optical Materials

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The integration of optical components directly into contact lens materials permits the realization of advanced display technologies and integrated medical instruments. A process is developed for the fabrication of aluminium nanowire grid polarizers encapsulated in a flexible, gas permeable, and biocompatible material for integration onto rigid, gas‐permeable contact lenses. Gas permeability values an order of magnitude higher than the minimum to prevent eye damage are measured while maintaining strong polarization performance. Further, the methods developed in this work can readily be applied to various optical and electronic technologies, allowing standard fabrication processes on rigid substrates and subsequent transfer to flexible, gas permeable, and biocompatible materials.

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“…A common procedure involves surface treatment techniques such as plasma oxidation to enhance bond strength. [10][11][12] However, such surface treatments remain stable in air for only a short time (a few minutes in our experience), creating a strict time constraint to align and attach a PDMS part to a substrate once the PDMS part is removed from the plasma etching tool. 9 Use of an intermediate layer is an alternate approach to facilitate bonding between two materials.…”

Section: Introductionmentioning

confidence: 99%

“…9 Use of an intermediate layer is an alternate approach to facilitate bonding between two materials. 12,13 For instance, ultraviolet (UV) curable adhesive has been used as an intermediate layer between substrates, such as glass and silicon as reported in Ref. 13.…”

Section: Introductionmentioning

confidence: 99%

“…13 Finally, a similar test is performed using a much more complex microfluidic PDMS device integrated onto an actual silicon-on-insulator microcantilever chip to qualitatively evaluate the pressure such devices need to withstand in practice. 12,14 For many applications it is beneficial to know at what pressure delamination and eventual leaking of sample fluid may occur between the PDMS and silicon substrate. For this reason, we chose to apply a burst pressure measurement as reported in Ref.…”

Section: Introductionmentioning

confidence: 99%

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Bonding of polydimethylsiloxane microfluidics to silicon-based sensors

Tsai

2011

J. Micro/Nanolith. MEMS MOEMS

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We investigate bonding polydimethylsiloxane (PDMS) to silicon using a thin (∼2 μm) intermediate adhesive layer stamped onto a PDMS piece prior to bonding. In particular, we compare as adhesive layers Sylgard 184 and 182 curing agents and a UV curable adhesive (NOA 75). We examine the effect of both curing temperature and duration on curing agent bond strength. Bond strengths for the different adhesives are determined by measuring the average burst pressure at a PDMS-silicon interface using a PDMS test design. We find that Sylgard 184 curing agent gives the highest bond strength with burst pressure of 700 kPa or more for curing at either 60 • C for 3 h, 70 • C for 30 min, or 90 • C for 20 min. Curing at room temperature takes substantially more time with an average burst pressure of 433 and 555 kPa for curing times of 16 and 27 h, respectively. In comparison, Sylgard 182 curing agent takes 32 h at room temperature to achieve a burst pressure of 289 kPa, while NOA 75 with a 50 • C 12 h post-UV exposure bake yields a burst pressure of 125 kPa. C 2011 Society of Photo-Optical Instrumentation Engineers (SPIE).

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The effect of adhesion promoter on the adhesion of PDMS to different substrate materials

Abstract: The effect of the adhesion promoter GE SS4120 on the adhesion strength of PDMS to different substrates was tested. The adhesion to silicon, glass and aluminium was significantly increased, while adhesion of PDMS to Teflon remained poor, and the adhesion strength of PDMS to PDMS decreased.

Cited by 43 publications

References 6 publications

Microfluidic Chips for Point‐of‐Care Immunodiagnostics

Microfluidic Chips for Point‐of‐Care Immunodiagnostics

Nanowire Grid Polarizers Integrated into Flexible, Gas Permeable, Biocompatible Materials and Contact Lenses

Bonding of polydimethylsiloxane microfluidics to silicon-based sensors

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