Stamps, inks and substrates: polymers in microcontact printing

Kaufmann, Tobias; Ravoo, Bart Jan

doi:10.1039/b9py00281b

Cited by 212 publications

(208 citation statements)

References 154 publications

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“…In recent years, μCP was modified to increase pattern homogeneity and to imprint functional materials such as polymers [68], metals [69], nanoparticles [70], proteins [71], lipids [72], and DNA [73] on inorganic and polymer substrates [68]. Among new techniques, Supramolecolar Contact Printing uses μCP to immobilize receptor molecules able to selectively physisorb enzymes, proteins, and cells.…”

Section: Advanced Nil Techniquesmentioning

confidence: 99%

Nanoimprint Lithography: Toward Functional Photonic Crystals

Lova

Soci

2015

Organic and Hybrid Photonic Crystals

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In this chapter we review the use of nanoimprint lithography and its derivative soft-lithography techniques for the fabrication of functional photonic crystals. Nanoimprint is a viable, scalable, and cost-effective solution for large area patterning. While initially it relied primarily on pattern transfer from a rigid mold to a thermally softened polymer by embossing, in the last two decades the process evolved rapidly, giving rise to new technologies that allow direct imprint of functional materials such as conjugated polymers, metals, biological matter, and metal oxides. These advancements generated increasing interest in the use of nanoimprint lithography for the fabrication of photonic structures for light management in optoelectronic devices. After describing standard nanoimprint lithography and its derivative soft-lithography methods, we briefly discuss nanoimprint capabilities and prospects in photonic applications. In particular we review recent implementations of imprinted photonic structures for light management in organic light emitting diodes, solar cells, solid state lasers and sensors.

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Section: Advanced Nil Techniquesmentioning

confidence: 99%

Nanoimprint Lithography: Toward Functional Photonic Crystals

Lova

Soci

2015

Organic and Hybrid Photonic Crystals

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“…To demonstrate that our stepwise copolymerization approach can be used to graft tailor-made materials on Au, we grew brushes of supramolecular polymers on microstructured surfaces.M icrocontact printing [14] was first applied to obtain patterned surfaces of tetraethylene glycol thiol (5) SAMs ( Figure 3A). In the next step,t he obtained microstructured gaps on the Au surface were functionalized with 3 to obtain line-shaped patterns of the surface-anchored supramolecular initiator.N ote that 3 was anchored directly onto the Au surface as af ree base to ensure dense packing, which is crucial to obtain brush-like polymer structures.…”

Section: Communicationsmentioning

confidence: 99%

Kinetically Controlled Sequential Growth of Surface‐Grafted Chiral Supramolecular Copolymers

et al. 2016

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We report a facile strategy to grow supramolecular copolymers on Au surfaces by successively exposing a surface-anchored monomer to solutions of oppositely charged peptide comonomers. Charge regulation on the active chain end of the polymer sufficiently slows down the kinetics of the self-assembly process to produce kinetically trapped copolymers at near-neutral pH. We thereby achieve architectural control at three levels: The β-sheet sequences direct the polymerization away from the surface, the height of the supramolecular copolymer brushes is well-controlled by the stepwise nature of the alternating copolymer growth, and 2D spatial resolution is realized by using micropatterned initiating monomers. The programmable nature of the resulting architectures renders this concept attractive for the development of customized biomaterials or chiral interfaces for optoelectronics and sensor applications.

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“…Microcontact printing is a sophisticated version of stamping where the molecules to be printed are adsorbed on the stamp surface during inking and transferred to the substrate due to physical or chemical interactions during printing, rather than being absorbed in the stamp during inking and diffused onto the substrate during printing as in traditional stamping [13]. The stamp is often an elastomer with a relief pattern fabricated by standard microelectronics methods [14]. Since its first presentation in the early 1990s by Kumar and Whitesides [15], microcontact printing has been used to transfer SAMs of organic molecules such as thiol or silanes onto different substrates to define electroplating masks for the fabrication of transistors [16][17][18][19][20] or to transfer tight SAMs of gold NPs for the fabrication of the gate of flash memories [21], among other applications.…”

Section: Introductionmentioning

confidence: 99%