Periodic Reporting for period 1 - NANOSTACKS (Nanostack printing for materials research)
Reporting period: 2020-08-01 to 2021-07-31
nano3D printable materials: fall into several categories:
1. Polymers that serve as “solid solvents”, i.e. when melted by heat or solvent vapour they support a chemical reaction just like a normal solvent does.
2. Amino acids that are embedded within “solid solvents”. These are used to first structure an acceptor slide with >20 different amino acids as solid materials, and then simply by melting elongate growing peptides in the array format to synthesize peptide arrays.
3. Other chemical building blocks embedded within solid solvents that similar to peptide synthesis are used to synthesize many different light absorbing molecules.
4. OLED materials, e.g. emitter materials, electron transport materials, hole transport materials that can be used to nano3D print diodes, LEDs, batteries, solar cells or similar.
5. Polymers with a very high density of reactive groups. Such polymers can react after or before nano3D printing with many different types of small molecules, e.g. to equip them with different types of redox centres, or metal centres.
6. Self-immolative polymers that start to depolymerize into small monomers that simply evaporate once a protecting group at the polymer’s ends is removed, e.g. by light or by acid. We want to use these self-immolative polymers as a carrier material for difficult-to-print-materials.
6. Finally, nanoparticles are printed in order to get lines or spots that serve as electrodes, conductors, isolators, capacitors, coils, semi-conducting LED layers etc.
Microstructured materials: A second line of experiments successfully manufactured microstructured pillars in order to define nano3D printing also in x,y-direction. Most interestingly, we identified some materials that could be used for reversible microstructuring. Unfortunately, due to corona restrictions, LEUVEN could hire its two PhD students only recently, which lead to some minor delays in the manufacturing of other microstructured acceptor slides.
nano3D printed functional entities: Next on the list of experiments will be to use the different materials that were identified in the first reporting period to nano3D print LEDs, conductors, insulators, and capacitors, and test them for performance. These experiments are due in the second reporting period.
High density arrays with fluorophores: An achievement that was not foreseen in the NANOSTACKS proposal was the finding that we can synthesise many other chemicals beyond peptide synthesis.
nano3D printing materials: During the first reporting period we found a surprising high percentage of nano3D printable materials. Moreover, when using a donor-heating-device we can obviously nano3D print materials that couldn’t be printed at room temperature.
nano3D printed nanostacks that function as LEDs or similar: These experiments will be done in the second reporting period.