Hydrophobic coating of microfluidic chips structured by SU-8 polymer for segmented flow operation

Schumacher, Johanna; Grodrian, Andreas; Kremin, Chr.; Hoffmann, Martin; Metze, J.

doi:10.1088/0960-1317/18/5/055019

Cited by 20 publications

(14 citation statements)

References 20 publications

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“…7(b) inset. This finding means that fewer charges were injected from the SWNTs to the SU-8 surface since SU-8 has hydrophobic surface properties [25], and there was no moisture on the surface of the SWNTs after SU-8 coating on top of the SWNT TFT channel. The calculated device mobilities were 26.9 cm 2 /Vs for the bottom gating and 27.0 cm 2 /Vs for the top gating, and, as shown, there was no change in the intrinsic properties of the SWNTs after SU-8 coating.…”

Section: November 2010mentioning

confidence: 97%

Optimization of single-walled carbon nanotube growth and study of the hysteresis of random network carbon nanotube thin film transistors

Hur

2010

Korean J. Chem. Eng.

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Random network single-walled carbon nanotube (SWNT)-based thin film transistors show excellent properties in sensors, electronic circuits, and flexible devices. However, they exhibit a significant amount of hysteresis behavior, which should be solved prior to use in industrial applications. This paper provides optimum conditions for the growth of random network SWNTs and reveals that the observed hysteresis behavior originates from the charge exchange between the SWNTs and the dielectric layer rather than from changes in the intrinsic properties of the SWNTs. This was proven by studying the conditions of stepwise gate sweep experiments and time measurements. This paper also shows that top gate SWNT thin film transistors (TFTs) with an SU-8 dielectric layer could provide a practical solution to the hysteresis problem for SWNT TFTs in electronic circuit applications.

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Section: November 2010mentioning

confidence: 97%

Optimization of single-walled carbon nanotube growth and study of the hysteresis of random network carbon nanotube thin film transistors

Hur

2010

Korean J. Chem. Eng.

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“…A suitable photoresist for structuring fluidic microchannels on wafer substrates is the biocompatible and chemically inert epoxy SU8, which develops vertical sidewalls of micrometer height on glass or silicon wafers [ 150,151 ]. The SU8 photoresist can be spun onto the wafer substrate using spin-coater at a speed that achieves specific thickness, under certain viscosity value and specific hydrophobic surface.…”

Section: Etching Proceduresmentioning

confidence: 99%

Microfabrication of biomedical lab-on-chip devices. A review

Giannitsis

2011

Estonian J. Eng.

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Lab-on-chip systems are a class of miniaturized analytical devices that integrate fluidics, electronics and various sensorics. They are capable of analysing biochemical liquid samples, like solutions of metabolites, macromolecules, proteins, nucleic acids, or cells and viruses. Supplementary to their measuring capabilities, the lab-on-chip devices facilitate fluidic transportation, sorting, mixing, or separation of liquid samples. A type of lab-on-chip devices, named biochip, is devoted specifically to genomic, proteomic and pharmaceutical tests. The significance of such miniaturized devices lies in their potentiality of automating laboratory procedures, which highly reduces the time of biomedical tests and laboratory work. This review summarizes numerous fabrication methods and procedures for producing lab-on-chip devices and also envisages future evolution.

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“…A suitable photoresist for structuring fluidic microchannels on wafer substrates is the biocompatible and chemically inert epoxy SU8, which develops vertical sidewalls of micrometer height on glass or silicon wafers [7,8]. Solidifying one SU8 formation against another by crosslinking the opposing SU8 layers, it is viable to produce microchannels.…”

Section: Etching Proceduresmentioning

confidence: 99%

Fabrication methods for microfluidic lab-on-chips

Giannitsis

Min

2010

2010 12th Biennial Baltic Electronics Conference

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Microfluidic lab-on-chips are miniaturized biosensors that integrate fluidic, electronics, thermal elements or optical apparatuses for analysing electrolytic or biochemical samples. Supplementary to their analysing capabilities, the microfluidic lab-on-chips can process, control, separate or sort fluidic samples by means of hydrodynamic manipulation, thermal gradients, electrical or optical actuation. The significance of the lab-on-chips lies on the potential of automating laboratory procedures which highly reduce the time of the laboratory tests. We review numerous fabrication methods and procedures that we have experienced by designing such devices.

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Hydrophobic coating of microfluidic chips structured by SU-8 polymer for segmented flow operation

Cited by 20 publications

References 20 publications

Optimization of single-walled carbon nanotube growth and study of the hysteresis of random network carbon nanotube thin film transistors

Optimization of single-walled carbon nanotube growth and study of the hysteresis of random network carbon nanotube thin film transistors

Microfabrication of biomedical lab-on-chip devices. A review

Fabrication methods for microfluidic lab-on-chips

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