Eliminating Capillary Coalescence of Nanowire Arrays with Applied Electric Fields

Hill, Justin J.; Haller, Kelly; Gelfand, Brittany; Ziegler, Kirk J.

doi:10.1021/am100290z

Cited by 54 publications

(50 citation statements)

References 24 publications

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“…Regarding the forces in play responsible for the nanowire perturbations seen in the different cases, it is a well-known issue that capillary forces can result in nanowire clustering, which is why samples were kept wet after the first wetting [43]. It is evident from the images showing standing nanowires underneath cells and from the blank nanowire samples (Figure S1) that capillary forces and processing did not induce extensive clustering or breaking of wires, although some collapsed nanowires are always to be expected during fabrication and processing.…”

Section: Discussionmentioning

confidence: 99%

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Mapping the Complex Morphology of Cell Interactions with Nanowire Substrates Using FIB-SEM

et al. 2013

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Using high resolution focused ion beam scanning electron microscopy (FIB-SEM) we study the details of cell-nanostructure interactions using serial block face imaging. 3T3 Fibroblast cellular monolayers are cultured on flat glass as a control surface and on two types of nanostructured scaffold substrates made from silicon black (Nanograss) with low- and high nanowire density. After culturing for 72 hours the cells were fixed, heavy metal stained, embedded in resin, and processed with FIB-SEM block face imaging without removing the substrate. The sample preparation procedure, image acquisition and image post-processing were specifically optimised for cellular monolayers cultured on nanostructured substrates. Cells display a wide range of interactions with the nanostructures depending on the surface morphology, but also greatly varying from one cell to another on the same substrate, illustrating a wide phenotypic variability. Depending on the substrate and cell, we observe that cells could for instance: break the nanowires and engulf them, flatten the nanowires or simply reside on top of them. Given the complexity of interactions, we have categorised our observations and created an overview map. The results demonstrate that detailed nanoscale resolution images are required to begin understanding the wide variety of individual cells’ interactions with a structured substrate. The map will provide a framework for light microscopy studies of such interactions indicating what modes of interactions must be considered.

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Section: Discussionmentioning

confidence: 99%

“…Standard conditions of 37°C and an atmosphere of 5% CO 2 were applied. As capillary forces during drying is known to incur nanowire bending and clustering [43], care was taken to always have liquid covering the samples during preparation.…”

Section: Methodsmentioning

confidence: 99%

Mapping the Complex Morphology of Cell Interactions with Nanowire Substrates Using FIB-SEM

et al. 2013

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“…Even for nanorods with a very low aspect ratio (not exceeding 3), a strong aggregation into bundles was observed [23]. Recently, the AAO template-assisted method of fabricating nanowires was modified for the preparation of freestanding nanowire arrays [23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Porous anodic alumina membranes formed by anodization of AA1050 alloy as templates for fabrication of metallic nanowire arrays

Zaraska

Sulka

Jaskuła

2010

Surface and Coatings Technology

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“…22 23 26 Recently, nanowire arrays patterns were successfully grown on solid surfaces to fabricate superhydrophobic surfaces. [27][28][29][30][31] Among surface characterization parameters of the nanostructured surfaces, contact angle hysteresis was rarely mentioned. The possible cause for this may be that there was hardly any hysteresis on those superhydrophobic surfaces.…”

Section: Introductionmentioning

confidence: 99%

Contact Angle Hysteresis on Textured Surfaces with Nanowire Clusters

Liao¹,

Chiang²,

Lu³

2013

j. nanosci. nanotech.

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Nanowire arrays with various agglomeration patterns were synthesized by adjusting the solvent evaporation rates. Nanowires with 200 nm diameter and 2-25 microm in length were fabricated from an anodic aluminum oxide (AAO) porous template. Various drying treatments were applied to develop nanostructured surfaces with topological differences. Due to surface tension forces, copper nanowires after thermal and evaporative drying treatments agglomerated into clusters, while supercritical drying technique provided excellent bundled-free and vertically-standing nanowire arrays. Although all dried surfaces exhibited hydrophobic nature, the contact angle hysteresis, or the difference between advancing and receding angles, was found to be larger on those surfaces with bundled nanowire clusters. To explain the difference, the wetted solid fraction on each surface was calculated using the Cassie-Baxter model to show that the hysteresis was contributed by liquid/solid contact area on the textured surfaces.

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Eliminating Capillary Coalescence of Nanowire Arrays with Applied Electric Fields

Cited by 54 publications

References 24 publications

Mapping the Complex Morphology of Cell Interactions with Nanowire Substrates Using FIB-SEM

Mapping the Complex Morphology of Cell Interactions with Nanowire Substrates Using FIB-SEM

Porous anodic alumina membranes formed by anodization of AA1050 alloy as templates for fabrication of metallic nanowire arrays

Contact Angle Hysteresis on Textured Surfaces with Nanowire Clusters

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