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or can also be attached to an external source by tubing so that liquid may be passed through channels on its surface. In this second case it will often be laminated to a surface so that chemistry can be performed on that surface producing a pattern of the PDMS stamp on to the surface. Alternatively a
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To apply a homogeneous pressure during the printing step, a magnetic force is used. For that, the stamp is sensitive to a magnetic field by injecting iron powder into a second layer of PDMS. This force can be adjusted for nano and micro-patterns. Fully automated micro contact printing equipment was
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The main drawback of microcontact printing for biomedical application is that it is not possible to print different molecules with one stamp. To print different (bio)molecules in one step, a new concept is proposed : the macrostamp. It is a stamp composed of dots. The space between the dots
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developed. It consists of the steps of the micro contact printing process : loading, inking, drying, printing, alignment, cleaning, unloading. A pipeting module is used to deposit some drop of liquids like ethanol. This equipment is named InnoSTAMP40.
186:"Transfer printing of sub-100 nm nanoparticles by soft lithography with solvent mediation", Aline Cerf, Christophe Vieu, Colloids and Surfaces A: Physicochemical and Engineering Aspects, Volume 342, Issues 1–3, 15 June 2009, Pages 136–140
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Many techniques have been developed to modify the basic setups to perform a range of tasks such as assays on small volumes. These kinds of devices are often referred to as
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corresponds to the space between the wells of a microplate. Then, it is possible to ink, dry and print in one step different molecules.
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PDMS stamp can be laminated to a second piece of PDMS to form a contained device. It is possible to pattern PDMS with
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Helene LALO, Jean-Christophe Cau, Christophe
Thibault, Nathalie Marsaud, Childerick Severac, Christophe Vieu,
175:"Magnetic field assisted microcontact printing: A new concept of fully automated and calibrated process"
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72:, which can lead to many useful properties; however, this reduces the ability of fluid streams to mix.
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177:, Microelectronic Engineering,Volume 110, October 2013, Pages 207–214|DOI: 10.1016/j.mee.2013.03.164
45:. This PDMS stamp can be used in either its current form as a relief surface for techniques such as
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Jean-Christophe Cau, Lafforgue
Ludovic, Nogues Marie, Lagraulet Adriana, Paveau Vincent,
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PDMS stamps can be procured from some commercial sources such as
Research Micro Stamps.
41:, that have been patterned usually against a master mold to form a relief pattern used in
164:, Microelectronic Engineering, Volume 86, Issues 4–6, April–June 2009, Pages 1428–1430
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162:"Microscale multiple biomolecules printing in one step using a PDMS macrostamp"
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image of streptavidin deposited by soft lithography with PDMS stamp.
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description of magnetic field assisted microcontact printing
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A new concept of PDMS stamp for multiplexing: the macrostamp
64:. Because of the small dimensions of these devices flow is
93:examples of macrostamp and magnetic macrostamp
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99:A new PDMS stamp : the Magnetic Stamp
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116:protocol to fabricate magnetic stamp
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220:Lithography (microfabrication)
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35:polydimethylsiloxane (PDMS)
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16:Patterned silicone piece]
148:"Research Micro Stamps"
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47:microcontact printing
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62:microfluidic devices
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196:InnoSTAMP40
31:PDMS stamps
209:Categories
198:, Innopsys
134:References
215:Silicones
70:turbulent
52:nanometre
39:silicone
66:laminar
68:, not
24:Sarfus
37:, a
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