A Lithography-Free Pathway for Chemical Microstructuring of Macromolecules from Aqueous Solution Based on Wrinkling

Pretzl, Melanie; Schweikart, Alexandra; Hanske, Christoph; Chiche, Arnaud; Zettl, Ute; Horn, Andrew B.; Böker, Alexander; Fery, Andreas

doi:10.1021/la8021694

Cited by 98 publications

(101 citation statements)

References 32 publications

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“…[ 86 , 87 ] An even simpler method for forming wrinkles involves surface oxidation of PDMS to establish the required stiffness mismatch. [ 88 ] With an adequate plasma exposure dose, a hard fi lm of SiO 2 with E f = 70 GPa, v f = 0.17 and thickness d dependent on the plasma power and time can be formed on the surface of PDMS. This compares to soft bulk PDMS having E f = 7.1 MPa and v f = 0.5.…”

Section: Reviewmentioning

confidence: 99%

Engineering of Micro‐ and Nanostructured Surfaces with Anisotropic Geometries and Properties

Tawfick¹,

Volder²,

Copic³

et al. 2012

Advanced Materials

210

179

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Widespread approaches to fabricate surfaces with robust micro- and nanostructured topographies have been stimulated by opportunities to enhance interface performance by combining physical and chemical effects. In particular, arrays of asymmetric surface features, such as arrays of grooves, inclined pillars, and helical protrusions, have been shown to impart unique anisotropy in properties including wetting, adhesion, thermal and/or electrical conductivity, optical activity, and capability to direct cell growth. These properties are of wide interest for applications including energy conversion, microelectronics, chemical and biological sensing, and bioengineering. However, fabrication of asymmetric surface features often pushes the limits of traditional etching and deposition techniques, making it challenging to produce the desired surfaces in a scalable and cost-effective manner. We review and classify approaches to fabricate arrays of asymmetric 2D and 3D surface features, in polymers, metals, and ceramics. Analytical and empirical relationships among geometries, materials, and surface properties are discussed, especially in the context of the applications mentioned above. Further, opportunities for new fabrication methods that combine lithography with principles of self-assembly are identified, aiming to establish design principles for fabrication of arbitrary 3D surface textures over large areas.

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Section: Reviewmentioning

confidence: 99%

Engineering of Micro‐ and Nanostructured Surfaces with Anisotropic Geometries and Properties

Tawfick¹,

Volder²,

Copic³

et al. 2012

Advanced Materials

210

179

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“…Wrinkles were aligned perpendicular to the applied strain (Bowden et al, 1999). Both the wavelength and the amplitude could be controlled via the plasma dose applied (Pretzl et al, 2008). In D. Voigt and others detail, the PDMS elastomer was prepared by mixing Sylgard 184 (Dow Corning, Midland, MI, USA) with a 10:1 ratio by mass of pre-polymer to curing agent.…”

Section: Substratesmentioning

confidence: 99%

Leaf beetle attachment on wrinkles: isotropic friction on anisotropic surfaces

Voigt

Schweikart

Fery

et al. 2012

Journal of Experimental Biology

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SUMMARY The influence of surface roughness on the attachment ability of insects has been repeatedly reported. In previous experiments, complex surface topographies were used as test substrates, whereas periodical structures have so far been neglected. In the present study, traction experiments with adult beetles Gastrophysa viridula and Leptinotarsa decemlineata were carried out to study the influence of surfaces, structured with periodical wrinkles, on insect attachment. Force measurements were carried out on male and female insects, both intact and after removal of claws, performing tethered walking on five polydimethylsiloxane substrates: (i) smooth, non-structured (control), (ii–v) structured with wrinkles of different wavelengths (366, 502, 911 and 25,076 nm). In two test series, beetles walked either perpendicular or parallel to the wrinkle alignment. Adults of G. viridula produced generally higher forces than those of L. decemlineata. The results show that the alignment of wrinkles had no significant influence on the force generation by beetles, probably because of the skewed position of their tarsomeres relative to the substrates. In both sexes, the highest force values were obtained on surfaces with wrinkles of 25 μm wavelength. On other wrinkled substrates, forces were significantly reduced in both males and females compared with the smooth, flat control, with the minimum force achieved on wrinkles with a wavelength of 911 nm.

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“…film drying), in both uni-and multi-axial geometries. Whilst several film fabrication methods yield laminate structures [25][26][27][28][29][30][31] , surface modification of the substrate material is an attractive route to skin formation due to its simplicity, good adhesion inter-layer adhesion properties promoting resilience to delamination upon strain 25,[32][33][34][35] . Elastomeric polydimethylsiloxane (PDMS) has been the substrate of choice for soft lithography 36 , in part due to its optical transparency, nm-replication fidelity, surface adhesion and bulk mechanical properties, and ease of handling.…”

Section: Introductionmentioning

confidence: 99%

Sub-100 nm wrinkling of polydimethylsiloxane by double frontal oxidation

et al. 2017

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We demonstrate nanoscale wrinkling on polydimethylsiloxane (PDMS) at sub-100 nm length scales via a (double) frontal surface oxidation coupled with a mechanical compression. The kinetics of the glassy skin propagation is resolved by neutron and X-ray reflectivity, and atomic force microscopy, combined with mechanical wrinkling experiments to evaluate the resulting pattern formation. In conventional PDMS surface oxidation, the smallest wrinkling patterns attainable have an intrinsic lower wavelength limit due to the coupling of skin formation and front propagation at fixed strain ε prestrain , whose maximum is, in turn, set by material failure. However, combining two different oxidative processes, an ultra-violet ozonolysis followed by air plasma exposure, we break this limit by fabricating trilayer laminates with excellent interfacial properties and a sequence of moduli and layer thicknesses able to trivially reduce the surface topography to sub-100 nm dimensions. This method provides a powerful, yet simple, non-lithographic approach to extend surface patterning from visible to the deep UV range.

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A Lithography-Free Pathway for Chemical Microstructuring of Macromolecules from Aqueous Solution Based on Wrinkling

Cited by 98 publications

References 32 publications

Engineering of Micro‐ and Nanostructured Surfaces with Anisotropic Geometries and Properties

Engineering of Micro‐ and Nanostructured Surfaces with Anisotropic Geometries and Properties

Leaf beetle attachment on wrinkles: isotropic friction on anisotropic surfaces

Sub-100 nm wrinkling of polydimethylsiloxane by double frontal oxidation

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