“Pop-slide” patterning: rapid fabrication of microstructured PDMS gasket slides for biological applications

Ramji, Ramesh; Khan, Nazoora; Muñoz-Rojas, Andrés R; Miller‐Jensen, Kathryn

doi:10.1039/c5ra09056c

Cited by 7 publications

(4 citation statements)

References 41 publications

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“…PDMS has many applications in various fields. It can be used for protective coatings against corrosion, ice-retarding, anti-biofouling and fire retardant, [ 4 ] in micropump and microvalve systems [ 5 , 6 , 7 ], as membranes [ 8 ], as wearable stretchable fabric for sensing and physical protection [ 9 , 10 , 11 ], and for piezoelectric usage [ 12 ]. Nevertheless, PDMS has some drawbacks that limit its application as a structural material.…”

Section: Introductionmentioning

confidence: 99%

Studying the Physical and Chemical Properties of Polydimethylsiloxane Matrix Reinforced by Nanostructured TiO2 Supported on Mesoporous Silica

Katz¹,

Lachman

Hafif

et al. 2022

Polymers

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In this study, a reactive adsorbent filler was integrated into a polymeric matrix as a novel reactive protective barrier without undermining its mechanical, thermal, and chemical properties. For this purpose, newly synthesized TiO2/MCM/polydimethylsiloxane (PDMS) composites were prepared, and their various properties were thoroughly studied. The filler, TiO2/MCM, is based on a (45 wt%) TiO2 nanoparticle catalyst inside the pores of ordered mesoporous silica, MCM-41, which combines a high adsorption capacity and catalytic capability. This study shows that the incorporation of TiO2/MCM significantly enhances the composite’s Young’s modulus in terms of tensile strength, as an optimal measurement of 1.6 MPa was obtained, compared with that of 0.8 MPa of pristine PDMS. The composites also showed a higher thermal stability, a reduction in the coefficient of thermal expansion (from 290 to 110 ppm/°C), a 25% reduction in the change in the normalized specific heat capacity, and an increase in the thermal degradation temperatures. The chemical stability in organic environments was improved, as toluene swelling decreased by 40% and the contact angle increased by ~15°. The enhanced properties of the novel synthesized TiO2/MCM/PDMS composite can be used in various applications where a high adsorption capacity and catalytic/photocatalytic activity are required, such as in protective equipment, microfluidic applications, and chemical sensor devices.

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Section: Introductionmentioning

confidence: 99%

Studying the Physical and Chemical Properties of Polydimethylsiloxane Matrix Reinforced by Nanostructured TiO2 Supported on Mesoporous Silica

Katz¹,

Lachman

Hafif

et al. 2022

Polymers

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“…This paper describes a novel approach to microfabricate patterns of polysiloxane via direct ink writing (DIW) printing using embedding fluids. Polysiloxane, a class of synthetic compounds comprising repeating siloxane moieties, is an elastic polymer widely used in fluidics, − optics, , and biomedical enginnering . Polysiloxane offers desirable properties for microfabrications , due to its castable and curable properties .…”

Section: Introductionmentioning

confidence: 99%

“…Polysiloxane, a class of synthetic compounds comprising repeating siloxane moieties, is an elastic polymer widely used in fluidics, 1−4 optics, 5,6 and biomedical enginnering. 7 Polysiloxane offers desirable properties for microfabrications 8,9 due to its castable and curable properties. 8 Soft lithography has been a standard technique in academic research laboratories for small-scale production of structures consisting of polysiloxane.…”

Section: Introductionmentioning

confidence: 99%

Embedded Ink Writing (EIW) of Polysiloxane Inks

Karyappa

Ching

Hashimoto

2020

ACS Appl. Mater. Interfaces

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Polysiloxane is a desirable material for the fabrication of devices in microfluidics, lab-on-a-chip, and microelectromechanical systems, but direct patterning of microstructures using liquid polysiloxane resins would require adequate rheological and chemical properties of the resins. In this work, we developed a simple method to fabricate planar microstructures consisting of polysiloxane using commercially available liquid polysiloxane resins without changing their properties. We used a direct ink writing (DIW) printer to dispense curable liquid polysiloxane (with the viscosity in the range of 1–100 Pa·s) in a liquid immiscible with the resins (such as methanol, ethanol, and isopropanol). The contact angle (θ) of the dispensed polysiloxane on the Petri dish increased from 20° in air to 100° in methanol, ethanol, and isopropanol. The increase in the contact angles allowed maintaining the structures of patterned polysiloxane until curing, and the embedding liquid was readily removed by evaporation. We termed this method as embedded ink writing (EIW). The effects of curing time (τ) and nozzle speed (v) on the width of the printed filament (w) were evaluated. EIW achieved the minimum width of the printed filament of 65 μm. EIW enabled direct writing of polysiloxane resins and should find applications in fabricating microfluidic devices, flexible wearables, and soft actuators.

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“…Glass microscope-slides are widely used by biologists in order to observe, analyze, and quantify cellular events and biological samples. Given their uses and its physical properties, microscope slides are used nowadays as base-substrates for the development of microfabrication-based devices such as microfluidics and Lab-on-a-Chip [1]- [4]. The fabrication of those devices requires a previous step of micropatterning.…”

Section: Introductionmentioning

confidence: 99%

Microfabrication of position reference patterns onto glass microscope slides for high-accurate analysis of dynamic cellular events

Galeano

Sandoz

Zarzycki

et al. 2017

TecnoL.

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Glass microscopes slides are widely used as in situ base-substrates carrying diverse micro-fabricated systems or elements. For such purposes, the micro-fabrication process consists in transferring a pre-defined design onto the substrate made of a glass microscope slide. This is known as patterning, which is a technique that can also be used in transferring specific designs that allows region of interest (ROI) recovery under the microscope. In those cases, two main challenges appear: 1) Disturbances in light transmission should remain minimum to keep the high quality of observation of the object of interest under the microscope. 2) The pattern-size should then be small enough but, however, larger than the diffraction limit to be observable satisfactorily for positioning purposes. In this article, we present the procedures involved in the microfabrication of Pseudo-Periodic Patterns (PPP) encrypting the absolute position of an extended area. Those patterns are embedded in Pétri dishes in order to allow the highaccurate retrieval of absolute position and orientation. The presented microfabrication is based in a technique known as lift-off, which after parameter adjustment, allows the obtaining of PPP fulfilling the two previously mentioned requirements. The results report on PPP realized on glass microscope slides and composed by 2µm side dots made of aluminum with a thickness of 30nm.

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“Pop-slide” patterning: rapid fabrication of microstructured PDMS gasket slides for biological applications

Cited by 7 publications

References 41 publications

Studying the Physical and Chemical Properties of Polydimethylsiloxane Matrix Reinforced by Nanostructured TiO2 Supported on Mesoporous Silica

Studying the Physical and Chemical Properties of Polydimethylsiloxane Matrix Reinforced by Nanostructured TiO2 Supported on Mesoporous Silica

Embedded Ink Writing (EIW) of Polysiloxane Inks

Microfabrication of position reference patterns onto glass microscope slides for high-accurate analysis of dynamic cellular events

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