A5029954997- Nonlinear Optical Materials Studies
- Photochromic and Fluorescence Chemistry
- Additive Manufacturing and 3D Printing Technologies
- Advanced Polymer Synthesis and Characterization
- Nanofabrication and Lithography Techniques
- Advanced Materials and Mechanics
- 3D Printing in Biomedical Research
- Photopolymerization techniques and applications
- Laser Material Processing Techniques
- Liquid Crystal Research Advancements
- Luminescence and Fluorescent Materials
- Dendrimers and Hyperbranched Polymers
- Advanced Sensor and Energy Harvesting Materials
- Organic Electronics and Photovoltaics
- Innovative Microfluidic and Catalytic Techniques Innovation
- Polymer composites and self-healing
- Supramolecular Self-Assembly in Materials
- Radical Photochemical Reactions
- biodegradable polymer synthesis and properties
- Laser-Ablation Synthesis of Nanoparticles
- Polymer Surface Interaction Studies
- Polydiacetylene-based materials and applications
- Click Chemistry and Applications
- Silicon and Solar Cell Technologies
- Surface Modification and Superhydrophobicity
Heidelberg University
2020-2025
Karlsruhe Institute of Technology
2015-2023
University of Chicago
2023
University of Southampton
2023
Texas A&M University
2023
Royal Society of Chemistry
2023
University of Nottingham
2023
University of Cambridge
2023
University of Washington
2023
Eindhoven University of Technology
2023
The translation of small molecule chemistries into efficient methodologies for polymer functionalization spans several decades, enabling critical advances in soft matter materials synthesis with tailored and adaptive property profiles. present Perspective explores—based on selected examples—50 years innovation chemistries. These span a diverse set based activated esters, thiol–ene/yne processes, nucleophilic systems isocyanates, reactions driven by the formation imines oximes, ring-opening...
Stimuli-responsive microstructures are critical to create adaptable systems in soft robotics and biosciences. For such applications, the materials must be compatible with aqueous environments enable manufacturing of three-dimensional structures. Poly(N-isopropylacrylamide) (pNIPAM) is a well-established polymer, exhibiting substantial response changes temperature close its lower solution temperature. To complex actuation patterns, that react differently respect stimulus required. Here, we...
Abstract Herein, various 3D additive manufacturing approaches are reviewed in terms of two important figures merit: maximum voxel printing rate and minimum size. Voxel sizes from several 100 µm down to the nm scale covered. Original results on multifocus two‐photon at around rates 10 7 voxels s −1 presented this context, which significantly surpass previous best values. These advances illustrated by applied making microstructured (chiral) mechanical metamaterials that composed more than...
Abstract 3D printing of adaptive and dynamic structures, also known as 4D printing, is one the key challenges in contemporary materials science. The additional dimension refers to ability printed structures change their properties—for example, shape—over time a controlled fashion result external stimulation. Within last years, significant efforts have been undertaken development new responsive for at macroscale. However, microscale still its early stages. Thus, this progress report will...
Three-dimensional (3D) laser micro- and nanoprinting has become a versatile, reliable, commercially available technology for the preparation of complex 3D architectures diverse applications. However, vast majority structures published so far have been composed only single constituent material. Here, we present system based on microfluidic chamber integrated into state-of-the-art lithography apparatus. This is scalable in terms number materials eliminates need to go back forth between...
Abstract A novel and versatile shape memory ink system allowing 4D printing with light at the macroscale as well microscale is presented. Digital processing (DLP) direct laser writing (DLW) are selected suitable 3D technologies to cover both regimes. First, a based on monofunctional isobornyl acrylate two crosslinkers consisting of soft hard diacrylate identified proven be compatible techniques. Employing DLP, large variety structures exhibiting distinct complexity printed. These range from...
Abstract Light‐based 3D printing has received significant attention due to several advantages including high speed and resolution. Along with the development of new technologies, material design is key for next generation light‐based printing. Conventional printable polymeric materials, also known as photopolymers or photoresins, often lead thermosets–polymer networks cross‐linked by permanent covalent bonds which bring limited adaptability restricted reprocessability. Dynamic that can...
Printed organic and inorganic electronics continue to be of large interest for sensors, bioelectronics, security applications. Many printing techniques have been investigated, albeit often with typical minimum feature sizes in the tens micrometer range requiring post-processing procedures at elevated temperatures enhance performance functional materials. Herein, we introduce laser three different inks, semiconductor ZnO metals Pt Ag, as a facile process fabricating printed electronic devices...
Abstract Four-dimensional (4D) printing is an advanced manufacturing technology that has rapidly emerged as a transformative tool with the capacity to reshape various research domains and industries. Distinguished by its integration of time dimension, 4D allows objects dynamically respond external stimuli, setting it apart from conventional 3D printing. This roadmap been devised, contributions 44 active researchers in this field 32 affiliations world-wide, navigate swiftly evolving landscape...
3D conductive microstructures containing gold are fabricated by simultaneous photopolymerization and photoreduction via direct laser writing. The photoresist employed consists of water-soluble polymers a precursor. show good conductivity successfully for connections between pads.
We pioneer the synthesis of fluorescent single chain nanoparticles (SCNPs) via UV-light induced folding based on tetrazole chemistry directly in pure water. Water-soluble photoreactive precursor polymers poly(acrylic acid) (PAA) bearing tetrazole, alkene and tetraethylene glycol monomethyl ether moieties, (PAAn(Tet/p-Mal/TEG)), or simply tetrazoles PAAn(Tet), were generated RAFT polymerization. While ene, acrylic acid containing fold dual nitrile imine-mediated tetrazole-ene cycloaddition...
Abstract A platform technology for multimaterial photoresists that can be orthogonally cured by disparate colors of light is introduced. The resist's photochemistry designed such one wavelength selectively activates the crosslinking set macromolecules, while a different initiates network formation chains. Each thus highly selective towards specific photoligation reaction within resist. Critically, shorter does not induce ligation longer species same resist mixture, defined as “wavelength...
Three-dimensional (3D) laser micro- and nanoprinting based upon multi-photon absorption has made its way from early scientific discovery to industrial manufacturing processes, e.g., for advanced microoptical components. However, so far, most realized 3D architectures are composed of only a single polymeric material. Here, we review printing multi-materials on the nano- microscale. We start with material properties that have been realized, using photoresists. Printed materials include bulk...
Abstract Driven by recent advances in rapid multiphoton single‐focus 3D laser nanoprinting, multifocus variants thereof, and projection‐based the necessary average total powers from femtosecond oscillators or even amplified systems have exceeded Watt level. Aiming at ever faster printing, there exist two options: Using yet more powerful lasers searching for sensitive photoresists allowing higher speeds comparable lower power levels. Here, altogether than 70 different literature a few new...
Many essential cellular processes are regulated by mechanical properties of their microenvironment. Here, we introduce stimuli-responsive composite scaffolds fabricated three-dimensional (3D) laser lithography to simultaneously stretch large numbers single cells in tailored 3D microenvironments. The key material is a photoresist containing cross-links formed noncovalent, directional interactions between β-cyclodextrin (host) and adamantane (guest). This allows reversible actuation under...
The ability to selectively remove sections from 3D-printed structures with high resolution remains a current challenge in 3D laser lithography. A novel photoresist is introduced enable the additive fabrication of microstructures at one wavelength and subsequent spatially controlled cleavage printed resist another wavelength. composed difunctional acrylate cross-linker containing photolabile o-nitrobenzyl ether moiety. are written by photoinduced radical polymerization acrylates using...
Additive manufacturing (AM) of polymeric materials enables the complex structures for a wide range applications. Among AM methods vat photopolymerization (VP) is desired owing to improved efficiency, excellent surface finish, and printing resolution at micron-scale. Nevertheless, major portion resins available VP are based on systems with limited or negligible recyclability. Here, we describe an approach that resin amenable re-printing retained properties appearance. To end, take advantage...
Abstract 4D printing has emerged as a powerful strategy capable of revolutionizing additive manufacturing by enabling objects to dynamically transform overtime on demand. Despite significant progress, the full potential remains unrealized, particularly in utilization dynamic covalent chemistry. This study introduces new approach using multifunctional cross‐linker with alkoxyamine functionalities for printing. Digital light processing (DLP) is employed high‐resolution complex objects....