Programme

Unfurtunately the monastery Irsee has been closed by the Bavarian government due to the corona virus.

Therefore we have decided to offer the conference as a web conference only.

In those unpredictable times, protecting our participants’ health has the highest priority for us!

The scientific exchange must not come to a complete standstill and we believe that with this web solution we have found a way to keep the scientific community going.

In order to participate in the livestream of the conference as easy as possible and to give your presentation, we recommend the use of the web browsers Google Chrome or Microsoft Edge.

Here you can find detailed instructions for using the livestream.

As a participant of the Bioinspired 2020 you have received an e-mail containing the login data for the web conference.

The login data for the sessions are provided daily.

In order to allow all conference participants access to the posters, we ask you to upload your poster by login on the conference homepage and clicking on the button "My Submission" in the upper right corner of the conference homepage. Then select the submission to which you want to upload the poster and upload the poster at the bottom of the page.

Furthermore we would like to ask all poster authors to prepare 4 PowerPoint slides to present your poster to the audience.
Please also include your contact details on the digital poster to allow participants to reach you with questions.

Please note that your poster will be pictured publically.

As poster author you can upload your poster similar to the way you submitted your abstract.
Click on "My Submissions" in the upper right corner at the homepage.

Poster documents can be found by opening the respective abstract in the online programme.
If a poster document has already been uploaded for the abstract, it can then be opened and downloaded.

Please note that your poster will be pictured publically.

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Please use for this the Q&A (F&A) button!

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Back to overview

Poster Pitch

Optimizing droplet size for self-assembly on inclined surfaces

Monday (16.03.2020)
17:26 - 17:29

Colloidal self‐assembly has been extensively explored for the fabrication of ordered and disordered structures for a variety of applications such as structural colors, next-generation reflective thermal barrier coatings (rTBC), porous membranes, catalysts and solid oxide fuel cells. The inspiration for the development of colloidal-based structures is often nature, ranging from structural coloration in bird feathers to broadband omnidirectional reflectors in beetles. Yet, there has been a deficit in the literature about the formation of such bioinspired materials on other than horizontally aligned and perfectly flat surfaces. In this work, we combine a 3D printing technique, direct writing, with colloidal self-assembly (AMCA) to enable the controlled and localized drop-cast of polystyrene and silica colloidal suspensions onto inclined surfaces, which subsequently assemble into photonic crystals or glasses. To simplify an overall complex process, we started by studying the printing procedure and self-assembly of single droplets onto sapphire surfaces with different tilting angles. Here, the droplet size plays a key role: next to providing a higher printing resolution, the reduction of the droplet size aids pinning of the droplet on tilted substrates, as gravitational force counteracts the adhesion and can also help hinder the coffee-ring formation [1,2]. Our results show that upon a certain volume, the shape of a pinned droplet on an inclined surface is far away from radial symmetric due to gravity driven deformation. Moreover, an intrinsic synergic effect between drop stability, coffee-ring size and structure homogeneity is found in regard to different particle compositions and size, as well as the tilting angle. These preliminary results pave the way to a better understanding of colloidal self-assembly onto inclined surfaces.

Speaker:
Benedikt Winhard
Hamburg University of Technology
Additional Authors:
  • Dr. Kaline Furlan
    Hamburg University of Technology
  • Prof. Dr. Gerold Schneider
    Hamburg University of Technology

Dateien

Category Short file description File description File Size
Poster Optimizing droplet size for self-assembly on inclined surfaces Benedikt Winhard, M.Sc.hons. Research Assistant Sonderforschungsbereich (SFB) 986 | www.tuhh.de/sfb986 E: benedikt.winhard@tuhh.de T: +49 40 428 78-2363 Hamburg University of Technology Institute of Advanced Ceramics | www.tuhh.de/gk Denickestraße 15 D-21073 Hamburg 4 MB Download
Presentation Winhard-71-Optimizing droplet size for self-assembly on inclined surfaces Benedikt Winhard, M.Sc.hons. Research Assistant Sonderforschungsbereich (SFB) 986 | www.tuhh.de/sfb986 E: benedikt.winhard@tuhh.de T: +49 40 428 78-2363 Hamburg University of Technology Institute of Advanced Ceramics | www.tuhh.de/gk Denickestraße 15 D-21073 Hamburg 20 MB Download