Microfluidics for High School Chemistry Students

Hemling, Melissa; Crooks, John A.; Oliver, Piercen M.; Brenner, Katie; Gilbertson, Jennifer; Lisensky, George C.; Weibel, Douglas B.

doi:10.1021/ed4003018

Cited by 46 publications

(50 citation statements)

References 11 publications

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“…The protocol described here is a variation of that presented by Hemling et al [3]. The geometry of 2D microchannels are designed using Microsoft Powerpoint (PPT).…”

Section: Microchannel Design Proceduresmentioning

confidence: 99%

Do-it-yourself microfluidics and possibilities for micro PIV

Jovic¹,

Raković²,

Čantrak³

et al. 2018

FME Transactions

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We present a method for microfluidic channel fabrication that has the following advantages compared to conventionally-used methods: technical simplicity, dramatically lower fabrication costs, and fabrication time. The method entails printing channel designs on a thermoplastic film from a LaserJet printer. Exposure to high temperatures elicits isotropic shrinkage of the film (in the x-y plane), in addition to thickening (in the z-direction), resulting in a positive relief mold. The microfluidic channel design of the mold is then transferred to a polydimethyl siloxane (PDMS) chip through soft lithography, resulting in a ready-to-use microfluidic chip. Through this approach, chips with complex channel geometries can be generated with low cost equipment and in as little as a couple hours. Flow visualizations from several chips from the "Do-it-yourself Microfluidics Workshop", held at the Faculty of Mechanical Engineering Univeristy of Belgrade, are presented in this paper. We also discuss possibilities for adapting micro particle image velocimetry (PIV) measurements to channel designs on PDMS-based microfluidic chips using the fabrication method delineated here.

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“…The protocol described here is a variation of that presented by Hemling et al [3]. The geometry of 2D microchannels are designed using Microsoft Powerpoint (PPT).…”

Section: Microchannel Design Proceduresmentioning

confidence: 99%

Do-it-yourself microfluidics and possibilities for micro PIV

Jovic¹,

Raković²,

Čantrak³

et al. 2018

FME Transactions

View full text Add to dashboard Cite

show abstract

“…Replica molding is a very old, simple, and reliable method, in which the micro-or nanopatterns on the surface of the prime (master) mold is duplicated on the polymer material [14]. The minimum feature size of less than 100 nm can be accurately replicated using this technique.…”

Section: Replica Mold (Rem) Techniquementioning

confidence: 99%

Micro/Nano Patterning on Polymers Using Soft Lithography Technique

Lakshminarayanan¹

2018

Micro/Nanolithography - A Heuristic Aspect on the Enduring Technology

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Microfabrication is essential in the field of science and technology. The development and innovations in this field are already prominent in the society through microelectronics and optoelectronics. The lithography or transfer of pattern to the substrate/surface of a layer is an important process step in microfabrication and is usually carried out with photolithography. Though photolithography is a well-established technique, it suffers from drawbacks such as limited feature size due to optical diffraction, requirement of high-energy radiation for small features, and high-cost involvement for sophisticated instruments. Also, it cannot be applied to nonplanar surfaces. Soft lithography is complement to photolithography which overcomes the above-mentioned drawbacks. Soft lithography is a simple and inexpensive method, and also, it suits to wide range of materials and very large surface areas. High-quality micropatterns or nanopatterns can be made using a patterned elastomeric stamp. This article briefly describes the various soft lithography techniques to obtain high-resolution structures for nanofabrication.

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“…Some activities demonstrate microfluidic principles by taking a fun "mocked-up" or scaled-up approach using materials like Lego (Jimenez et al 2015), modelling clay (Jimenez and Bridle 2015), Jell-O (Yang et al 2010) and chocolate (Esfahani et al 2016). Others allow participants to use microfluidics to undertake diagnostics or other example experiments illustrating the potential application areas (Hemling et al 2014). Several low-cost fabrication methods, like shrink film (Nguyen et al 2011), have been developed to allow for microfluidics education in the school classroom enabling students to fabricate and test devices.…”

Section: Introductionmentioning

confidence: 99%