6 article(s) from Heepe, Lars
- Full Research Paper
- Published 21 Nov 2022
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Figure 1: Biological role model and biomimetic air retaining surfaces. a) Leaf of the floating fern Salvinia ...
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Figure 2: Confirmation of the persistence of the air layer in low water depth and analysis of the shape of th...
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Figure 3: Results of the long term investigations of air layers on MSM in three different depths. a) The grap...
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Figure 4: To determine pressure stability and diffusion behavior of the MSM, CLSM and a custom-made pressure ...
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Figure 5: Results of the pressure stability and diffusion behavior experiments. a) With increasing pressure (...
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Figure 6: SEM images of the MSM after they have been submerged for one month in tap water. a) A microbial neu...
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- Full Research Paper
- Published 22 Sep 2016
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Figure 1: Attachment devices of Coccinella septempuctata (A) attachment devices. Tarsi of forelegs (B), midle...
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Figure 2: Schematic of the experimental setup used for traction force experiments under controlled ambient hu...
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Figure 3: Box-and-whiskers plots, based on the results of the first experiment, with one RH level tested per ...
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Figure 4: Box-and-whiskers diagrams based on the results of the second experiment with all three levels of RH...
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- Full Research Paper
- Published 21 Jul 2014
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Figure 1: From the snake skin microstructure to the SIMPS. a) Photograph of the California King Snake (Lampro...
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Figure 2: Scheme of the directionality of frictional measurements on polymer surfaces and its geometry. a) Di...
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Figure 3: SEM (a–d) and AFM (e) micrographs of epoxy resin polymer moulds of different types of surfaces used...
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Figure 4: Contact area between sphere and flat elastic surface. F: Normal force. a: indentation radius. d: In...
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Figure 5: Geometric interaction between sphere and PGMS. R: sphere radius. a: indentation radius. d: indentat...
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Figure 6: a) Results of tribological characterization of microstructured polymer surfaces in contact with a s...
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Figure 7: a) Results of tribological measurements of PGMS with different wavelengths (λ) in contact with a gl...
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Figure 8: a) Results of tribological measurements of SIMPS in contact with a glass ball. Black column: smooth...
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- Full Research Paper
- Published 25 Jun 2014
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Figure 1: Schematic of the experimental setup (A). FMS, force measuring system; S, sample; GS, glass slide; O...
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Figure 2: Schematic of the optical path in the RICM at the glass–water–PVS layers. The incoming beam with int...
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Figure 3: Sample 1 in dry contact with glass (A) and in contact with glass underwater (B). Scale bar, 10 µm.
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Figure 4: Pull-off forces, normalized by the average value of the dry state. Two individual MSAMS samples wer...
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Figure 5: Detachment sequences of individual MSAMSs separating from a glass substrate for the sample 1 in the...
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Figure 6: Simulated image of an individual MSAMS partially detached from a glass substrate submerged in water...
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- Full Research Paper
- Published 24 Jan 2014
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Figure 1: From snake skin to SIMPS. a) Photograph of L. g. californiae , the California King Snake; b) SEM mi...
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Figure 2: Results of frictional measurements on periodical groove-like polymer surface – PGMS perpendicular t...
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Figure 3: Results of frictional measurements on periodical groove-like polymer surface – PGMS parallel to the...
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Figure 4: Results of frictional measurements on randomly-rough surfaces – RRS. Left column, frictional signal...
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Figure 5: Frequency analysis of frictional coefficients measured on molds of snake skin (L. g. californiae) -...
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Figure 6: Frequency analysis of the frictional coefficient measured on snake-inspired microstructured polymer...
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Figure 7: Exemplary overview of the topography of the examined polymer surfaces. Left column: SEM-micrographs...
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Figure 8: Scheme of surface geometry and sliding directions of friction measurement, top view (left) and side...
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Figure 9: Example of data analysis of the frictional signal measured on the periodical groove-like polymer su...
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