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Muller Nicolas

Professeur HES associé

Main skills

Optical and Electron Microscopy

Professeur HES associé

Phone: +41 26 429 66 45

Haute école d'ingénierie et d'architecture de Fribourg
Boulevard de Pérolles 80, 1700 Fribourg, CH

Institute
iPrint - Institut de printing

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Completed

The Inkjet Training

AGP

Role: Collaborator

Requérant(e)s: FR - EIA - Institut IPRINT, Bircher Fritz, FR - EIA - Institut IPRINT

Financement: Divers

Description du projet : A Hands-on Lab-based Course in Inkjet Engineering and Inkjet Chemistry.

, , , , , , , , , , , , , , , , , , , Research team within HES-SO: Caldi Jonathan Wenger Raphaël Bourguet Florian Kolly Gaëtan Bircher Fritz Filliger Sebastian Huber Benjamin Renner Johannes Mauron Muriel Kessler Philip Soutrenon Mathieu Murith Loïc Schneuwly Vincent Varisco Massimo Kuhlmann Martin Muller Nicolas Jemmely Yannick Gugler Anne Carrie Natalia Ilano Céline

Partenaires académiques: FR - EIA - Institut IPRINT; Bircher Fritz, FR - EIA - Institut IPRINT

Durée du projet: 31.08.2015 - 31.12.2020

Montant global du projet: 332'965 CHF

Statut: Completed

2022

Inkjet printing of structurally colored self-assembled colloidal aggregates

Scientific paper ArODES

Pavel Yazhgur, Nicolas Muller, Frank Scheffold

ACS Photonics, 2022

Link to the publication

Summary:

Structurally colored materials offer increased stability, high biocompatibility, and a large variety of colors, which can hardly be reached simultaneously using conventional chemical pigments. However, for practical applications, such as inkjet printing, it is vital to compartmentalize these materials in small building blocks (with sizes ideally below 5 μm) and create “ready-to-use” inks. The latter can be achieved by using photonic balls (PB): spherical aggregates of nanoparticles. Here, we demonstrate, for the first time, how photonic ball dispersions can be used as inkjet printing inks. We use solvent drying techniques to manufacture structurally colored colloidal aggregates. The as-fabricated photonic balls are dispersed in pentanol to form ink. A custom-made inkjet printing platform equipped with an industrial printhead and recirculation fluidic system is used to print complex structurally colored patterns. We increase color purity and suppress multiple scattering by introducing carbon black as a broadband light absorber.

2021

Scattering from controlled defects in woodpile photonic crystals

Scientific paper ArODES

Stefan Aeby, Geoffroy J. Aubry, Nicolas Muller, Frank Scheffold

Advanced Optical Materials, 2021, article no. e2001699

Link to the publication

Summary:

Photonic crystals display partial or full band gaps that become more pronounced with rising refractive index contrast. However, imperfections in the material cause light scattering and extinction of the interfering propagating waves. Positive as well as negative defect volumes may contribute to this kind of optical perturbation. In this study, 3D woodpile photonic crystals are fabricated and characterized with a pseudo‐bandgap for near‐infrared optical wavelengths. By direct laser writing, defects are introduced in the periodic structure at selected positions. It is shown that defect scattering can be modeled by considering the difference between the disordered and the regular structure. The findings pave the way toward better control and understanding of the role of defects in photonic materials that will be crucial for their usability in potential applications.

2023

Printing structurally colored photonic materials

Conference ArODES

Pavel Yazhgur, Nicolas Muller, Sandrine Aeby, Abraham Aguilar Uribe, Frank Scheffold

Proceedings Bioinspiration, Biomimetics, and Bioreplication XIII ; Proceeeings of SPIE Smart Structures + Nondestructive Evaluation, 12-17 March 2023, Long Beach, CA, USA

Link to the conference

Summary:

The advantage of structurally colored materials is their stability and the fact that they can be sourced sustainably. In addition to the challenges of producing high-quality colors, fabrication and patterning are also important issues. Different printing processes are available depending on the area of application. In this paper, we report on recent advances in the fabrication of structurally disordered photonic materials by patterning self-assembled color pigments using inkjet printing and by direct laser writing.

2021

Printing and generating structural colors by means of inkjet technology

Conference ArODES

Nicolas Muller, Pavel Yazghur, Frank Scheffold, Gilbert Gugler

Proceedings of European Coating Symposium (ECS) 2021, 7-9 September 2021, Brussels, Belgium

Link to the conference

Summary:

In the context of Industry 4.0, inkjet technology has the unrivaled advantage of being digital and versatile by its nature. The recent breakthrough in the understanding of structurally colored materials provides new design platforms for pigments in a variety of applications. An appealing approach is the design of photonic pigments for inkjet printing. However, inkjet technology imposes strict limitations with respect to pigment size. Here we show the deposition and the fabrication of photonic pigments by inkjet technology.

Long distance jetting :

Conference ArODES

digital printing on non-planar shapes

Olivier Bürgy, Nicolas Muller, Natalia Carrie, Gilbert Gugler, Yoshinori Domae

Proceedings of European Coating Symposium (ECS) 2021, 7-9 September 2021, Brussels, Belgium

Link to the conference

Summary:

The inkjet printing technology plays a major role in the digital printing field. Having the possibility to digitally and selectively print or coat areas offers a great advantage. Usually inkjet was limited to flat substrates but nowadays with modern printheads and advanced waveform tuning, it is possible to extend the jetting distance and print on non-planar shapes. This paper will compare different printheads and the strategies used to increase the jetting distance.

Achievements

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Muller Nicolas

Professeur HES associé

Main skills

Inkjet

Lithographic Printing

Photonics

Particle Synthesis

Optical and Electron Microscopy

Spectroscopy

Professeur HES associé