An ultra-thin PDMS membrane as a bio/micro–nano interface: fabrication and characterization

Thangawng, Abel L.; Ruoff, Rodney S.; Swartz, Melody A.; Glucksberg, Matthew R.

doi:10.1007/s10544-007-9070-6

Cited by 171 publications

(140 citation statements)

References 24 publications

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“…PDMS has become the preferred material for biomedical electrons and microscale fluid devices due to the following advantages: (a) low production cost compared to traditional MEMS substrate materials such as silicon or glass; (b) optical transparency (transparent for a wavelength range of 400-700 nm); (c) biocompatibility; and (d) easy bonding to itself or other substrates. [10][11][12][13][14] In addition to those advantages, the rubber elastic properties of PDMS have become versatile tools for microfluidic devices and have been used in micro-flow cytometry, peristaltic pumping and mixing, microvalves, and portable immunosensing systems. [15][16][17][18] A highly flexible PDMS chip also was used to maintain chemostatic conditions for bacterial and yeast colony growth.…”

Section: Introductionmentioning

confidence: 99%

Deformation properties between fluid and periodic circular obstacles in polydimethylsiloxane microchannels: Experimental and numerical investigations under various conditions

2013

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Understanding the mechanical properties of optically transparent polydimethylsiloxane (PDMS) microchannels was essential to the design of polymer-based microdevices. In this experiment, PDMS microchannels were filled with a 100 lM solution of rhodamine 6G dye at very low Reynolds numbers ($10 À3 ). The deformation of PDMS microchannels created by pressure-driven flow was investigated by fluorescence microscopy and quantified the deformation by the linear relationship between dye layer thickness and intensity. A line scan across the channel determined the microchannel deformation at several channel positions. Scaling analysis widely used to justify PDMS bulging approximation was allowed when the applied flow rate was as high as 2.0 ll/min. The three physical parameters (i.e., flow rate, PDMS wall thickness, and mixing ratio) and the design parameter (i.e., channel aspect ratio ¼ channel height/channel width) were considered as critical parameters and provided the different features of pressure distributions within polymer-based microchannel devices. The investigations of the four parameters performed on flexible materials were carried out by comparison of experiment and finite element method (FEM) results. The measured Young's modulus from PDMS tensile test specimens at various circumstances provided reliable results for the finite element method. A thin channel wall, less cross-linker, high flow rate, and low aspect ratio microchannel were inclined to have a significant PDMS bulging. Among them, various mixing ratios related to material property and aspect ratios were one of the significant factors to determine PDMS bulging properties. The measured deformations were larger than the numerical simulation but were within corresponding values predicted by the finite element method in most cases. V C 2013 AIP Publishing LLC. [http://dx

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Section: Introductionmentioning

confidence: 99%

Deformation properties between fluid and periodic circular obstacles in polydimethylsiloxane microchannels: Experimental and numerical investigations under various conditions

2013

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“…The STP method enables fabrication of NW devices on adhesive substrates, such as PDMS and many types of adhesive tapes, by peeling off prefabricated NW devices from a donor Si wafer by using the adhesive receiver substrates. The STP method was first demonstrated with PDMS as the receiver substrate because PDMS is commonly used for microfluidic and biological applications because of its simplicity in fabrication, excellent elasticity, and biocompatibility (24). The basic steps of transferring NW devices onto PDMS by using the STP method are summarized in Fig.…”

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confidence: 99%

Fabricating nanowire devices on diverse substrates by simple transfer-printing methods

Lee

Kim

Zheng

2010

Proc. Natl. Acad. Sci. U.S.A.

130

105

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The fabrication of nanowire (NW) devices on diverse substrates is necessary for applications such as flexible electronics, conformable sensors, and transparent solar cells. Although NWs have been fabricated on plastic and glass by lithographic methods, the choice of device substrates is severely limited by the lithographic process temperature and substrate properties. Here we report three new transfer-printing methods for fabricating NW devices on diverse substrates including polydimethylsiloxane, Petri dishes, Kapton tapes, thermal release tapes, and many types of adhesive tapes. These transfer-printing methods rely on the differences in adhesion to transfer NWs, metal films, and devices from weakly adhesive donor substrates to more strongly adhesive receiver substrates. Electrical characterization of fabricated NW devices shows that reliable ohmic contacts are formed between NWs and electrodes. Moreover, we demonstrated that Si NW devices fabricated by the transfer-printing methods are robust piezoresistive stress sensors and temperature sensors with reliable performance.S emiconductor nanowires (NWs), because of their unique physical and chemical properties, have great potential for applications in the areas of electronics (1-3), photonics (4-7), and bio/chemical sensors (8-13), and the current state of the art of NW devices has been reviewed in refs. 14 and 15. In particular, when semiconductor NW devices are fabricated on flexible substrates, they function as versatile building blocks for high performance flexible and/or transparent electronics (16, 17) with possible extension to flexible displays, touch screens, flexible solar cells, and conformable sensors (8,16,17). To realize these NWbased applications, great efforts have been devoted to the fabrication of NW devices on flexible/transparent substrates with methods including conventional photo-and electron beam lithography (6)(7)(8)17). Although NW devices have been successfully fabricated on plastics, glass, and 17,18), the choice of device substrates is generally restricted because many useful flexible/transparent substrates, such as polydimethylsiloxane (PDMS) and tapes, suffer from problems such as shrinkage or degradation at the processing temperature, poor adhesion to NWs and metal electrodes, incompatibility with solvents and acids, and being too flexible to be handled for the lithography step.Here we report three simple transfer-printing methods to fabricate NW devices on diverse substrates including PDMS, Petri dishes, Kapton tapes, thermal release tapes, and many types of adhesive tapes. The three transfer-printing methods basically rely on the differences in adhesion to transfer NWs, metal films, and even entire NW devices from weakly adhesive donor substrates to more strongly adhesive receiver substrates when these two substrates are brought into close physical contact. Previously reported transfer-printing methods, such as microcontact printing, nanoscale-transfer printing, and metal transfer printing (16,(19)(20)(21)(22)(23), have been used...

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“…그리고 Silwet L-77은 표면에너지를 높여주는 계 면활성제로 사용되며 주로 PDMS와 혼합하여 반영구적으로 표면물 성을 개질하는데 사용된다 [19] . 을 낮추게 된다 [20] . …”

Section: (A-d)와unclassified

Fabrication of Nanopatterned PDMS Elastic Stamp Mold Using Surface Treatment of Nanotemplate

Park¹,

Seo²,

Seo³

et al. 2015

Journal of The Korean Society of Manufacturing Technology Engin

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Article history:Polydimethylsiloxane (PDMS) is a widely used material for replicating micro-structures because of its transparency, deformability, and easy fabrication. At the nanoscale, however, it is hard to fill a nanohole template with uncured PDMS. This paper introduces several simple methods by changing the surface energy of a nanohole template and PDMS elastomer for replicating 100nm-scale structures. In the case of template, pristine anodic aluminum oxide (AAO), hydrophobically treated AAO, and hydrophillically treated AAO are used. For the surface energy change of the PDMS elastomer, a hydrophilic additive and dilution solvent are added in the PDMS prepolymer. During the molding process, a simple casting method is used for all combinations of the treated template and modified PDMS. The nanostructured PDMS surface was investigated with a scanning electron microscope after the molding process for verification.

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An ultra-thin PDMS membrane as a bio/micro–nano interface: fabrication and characterization

Cited by 171 publications

References 24 publications

Deformation properties between fluid and periodic circular obstacles in polydimethylsiloxane microchannels: Experimental and numerical investigations under various conditions

Deformation properties between fluid and periodic circular obstacles in polydimethylsiloxane microchannels: Experimental and numerical investigations under various conditions

Fabricating nanowire devices on diverse substrates by simple transfer-printing methods

Fabrication of Nanopatterned PDMS Elastic Stamp Mold Using Surface Treatment of Nanotemplate

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