PDMS stamps are pieces of polydimethylsiloxane (PDMS), a silicone, that have been patterned usually against a master mold to form a relief pattern used in soft lithography. This PDMS stamp can be used in either its current form as a relief surface for techniques such as microcontact printing 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 PDMS stamp can be laminated to a second piece of PDMS to form a contained device. It is possible to pattern PDMS with nanometre resolution.
Sarfus image of streptavidin deposited by soft lithography with PDMS stamp.
PDMS stamps can be procured from some commercial sources such as Research Micro Stamps.[1]
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 microfluidic devices. Because of the small dimensions of these devices flow is laminar, not turbulent, which can lead to many useful properties; however, this reduces the ability of fluid streams to mix.
A new concept of PDMS stamp for multiplexing: the macrostampedit
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.[2] It is a stamp composed of dots. The space between the dots corresponds to the space between the wells of a microplate. Then, it is possible to ink, dry and print in one step different molecules.
examples of macrostamp and magnetic macrostamp
A new PDMS stamp : the Magnetic Stampedit
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.[3] Fully automated micro contact printing equipment was 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.[4] This equipment is named InnoSTAMP40.[5]
protocol to fabricate magnetic stamp
description of magnetic field assisted microcontact printing
pdms, stamp, pieces, polydimethylsiloxane, pdms, silicone, that, have, been, patterned, usually, against, master, mold, form, relief, pattern, used, soft, lithography, this, used, either, current, form, relief, surface, techniques, such, microcontact, printing. PDMS stamps are pieces of polydimethylsiloxane PDMS a silicone that have been patterned usually against a master mold to form a relief pattern used in soft lithography This PDMS stamp can be used in either its current form as a relief surface for techniques such as microcontact printing 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 PDMS stamp can be laminated to a second piece of PDMS to form a contained device It is possible to pattern PDMS with nanometre resolution Sarfus image of streptavidin deposited by soft lithography with PDMS stamp PDMS stamps can be procured from some commercial sources such as Research Micro Stamps 1 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 microfluidic devices Because of the small dimensions of these devices flow is laminar not turbulent which can lead to many useful properties however this reduces the ability of fluid streams to mix A new concept of PDMS stamp for multiplexing the macrostamp editThe 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 2 It is a stamp composed of dots The space between the dots corresponds to the space between the wells of a microplate Then it is possible to ink dry and print in one step different molecules nbsp examples of macrostamp and magnetic macrostampA new PDMS stamp the Magnetic Stamp editTo 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 3 Fully automated micro contact printing equipment was 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 4 This equipment is named InnoSTAMP40 5 nbsp protocol to fabricate magnetic stamp nbsp description of magnetic field assisted microcontact printingReferences edit Research Micro Stamps Helene LALO Jean Christophe Cau Christophe Thibault Nathalie Marsaud Childerick Severac Christophe Vieu Microscale multiple biomolecules printing in one step using a PDMS macrostamp Microelectronic Engineering Volume 86 Issues 4 6 April June 2009 Pages 1428 1430 Jean Christophe Cau Lafforgue Ludovic Nogues Marie Lagraulet Adriana Paveau Vincent Magnetic field assisted microcontact printing A new concept of fully automated and calibrated process Microelectronic Engineering Volume 110 October 2013 Pages 207 214 DOI 10 1016 j mee 2013 03 164 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 InnoSTAMP40 Innopsys Retrieved from https en wikipedia org w index php title PDMS stamp amp oldid 1156872204, wikipedia, wiki, book, books, library,
