Buckling in nanomechanical films

Hendricks, Troy R.; Wang, Wei; Lee, Ilsoon

doi:10.1039/b925943k

Cited by 48 publications

(31 citation statements)

References 26 publications

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“…However, e must exceed a critical strain (e c ) that is a function of the ratio of elastic moduli for wrinkling to occur [38]. At low strain, the wavelength of the wrinkles should be independent of strain from a linear elastic analysis (previous studies utilizing PDMS indicate that elastic recovery occurs for e < 40%) [19].…”

Section: Resultsmentioning

confidence: 99%

Slip-stick wetting and large contact angle hysteresis on wrinkled surfaces

Bukowsky

Torres

Vogt

2011

Journal of Colloid and Interface Science

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Section: Resultsmentioning

confidence: 99%

Slip-stick wetting and large contact angle hysteresis on wrinkled surfaces

Bukowsky

Torres

Vogt

2011

Journal of Colloid and Interface Science

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“…While controlling buckling instabilities is notoriously difficult, particularly under multiaxial compression, there have been different attempts to guide wrinkles in different supported thin films (Hendricks et al, 2010). Wrinkling patterns in metal-capped thin polymer films have been modulated, but not precisely controlled, by chemically patterning the adhesive properties of the substrate (Vandeparre et al, 2007).…”

Section: Using Patterns Of Stripes Of Weak Adhesionmentioning

confidence: 99%

Understanding and strain-engineering wrinkle networks in supported graphene through simulations

Zhang

Arroyo

2014

Journal of the Mechanics and Physics of Solids

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Wrinkle networks are ubiquitous buckle-induced delaminations in supported graphene, which locally modify the electronic structure and degrade device performance. Although the strong property-deformation coupling of graphene can be potentially harnessed by strain engineering, it has not been possible to precisely control the geometry of wrinkle networks. Through numerical simulations based on an atomistically informed continuum theory, we understand how strain anisotropy, adhesion and friction govern spontaneous wrinkling. We then propose a strategy to control the location of wrinkles through patterns of weaker adhesion. This strategy is deceptively simple, and can in fact fail in several ways, particularly under biaxial compression. However, within bounds set by the physics of wrinkling, it is possible to robustly create by strain a variety of wrinkle network geometries and junction configurations. Graphene is nearly unstrained in the planar regions bounded by wrinkles, highly curved along wrinkles, and highly stretched and curved at junctions, which can either locally attenuate or amplify the applied strain depending on their configuration. These mechanically self-assembled networks are stable under the pressure produced by an enclosed fluid and form continuous channels, opening the door to nano-fluidic applications.Peer ReviewedPostprint (published version

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“…17,18 Surface wrinkling is a particularly interesting topography because of its ease of fabrication and unique topological features. 19,20 Wrinkling is a form of mechanical instability that occurs when a thin stiff film of one material bonded to a softer, more compliant substrate experiences a compressive force. Once the compressive force along a certain direction exceeds a critical value, the thin film buckles and produces wrinkles in the direction perpendicular to the force.…”

Section: Introductionmentioning

confidence: 99%

Facile Synthesis of Conductive Polypyrrole Wrinkle Topographies on Polydimethylsiloxane via a Swelling–Deswelling Process and Their Potential Uses in Tissue Engineering

Aufan

Yang

Kim

et al. 2015

ACS Appl. Mater. Interfaces

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Electrically conducting biomaterials have gained great attention in various biomedical studies especially to influence cell and tissue responses. In addition, wrinkling can present a unique topography that can modulate cell-material interactions. In this study, we developed a simple method to create wrinkle topographies of conductive polypyrrole (wPPy) on soft polydimethylsiloxane surfaces via a swelling-deswelling process during and after PPy polymerization and by varying the thickness of the PPy top layers. As a result, various features of wPPy in the range of the nano- and microscales were successfully obtained. In vitro cell culture studies with NIH 3T3 fibroblasts and PC12 neuronal cells indicated that the conductive wrinkle topographies promote cell adhesion and neurite outgrowth of PC12 cells. Our studies help to elucidate the design of the surface coating and patterning of conducting polymers, which will enable us to simultaneously provide topographical and electrical signals to improve cell-surface interactions for potential tissue-engineering applications.

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Buckling in nanomechanical films

Cited by 48 publications

References 26 publications

Slip-stick wetting and large contact angle hysteresis on wrinkled surfaces

Slip-stick wetting and large contact angle hysteresis on wrinkled surfaces

Understanding and strain-engineering wrinkle networks in supported graphene through simulations

Facile Synthesis of Conductive Polypyrrole Wrinkle Topographies on Polydimethylsiloxane via a Swelling–Deswelling Process and Their Potential Uses in Tissue Engineering

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