Matthias P. Kremer
Dr Kremer studied mechanical engineering at Karlsruhe Institute of Technology (KIT), Germany, and obtained his Dipl.-Ing. in 2013. During the Diploma Thesis he worked on MOEMS based laser scanners for light driven microfluidics. Both his Diploma Thesis and the following PhD were conducted at CTR Carinthian Tech Research in Villach, Austria, in collaboration with and under the supervision of Prof A. Guber of the Institute of Microstructure Technology from KIT. During his PhD he worked on printed reactive nanocomposites for bonding applications. He has previously worked with ink-jet printing and photopolymer 3D printing. In 2016 he joined the Characterisation & Processing of Advanced Materials group of Prof Nicolosi in Trinity College Dublin.
Research Interests (Lay Summary)
Dr Kremer’s research focusses on the printing of energy storage devices, such as batteries or supercapacitors, with novel two-dimensional nanoparticles. These particles can be made into “inks” for printing by shedding ultra-thin sheets of the desired material within a liquid solvent. Using nanomaterial inks and advanced printing techniques allows fabrication of batteries in many different forms and shapes such as embedded into a device housing or even within a flexible fabric for wearable electronics.
Liquid phase exfoliation of two-dimensional nanomaterials has been shown to effectively produce large quantities of high quality nanosheets. Synthesis, storage and handling of nanomaterials within liquid solvents facilitates their use in applications using printing technologies. Depending on the application and substrate to be used, different printing techniques are more suitable. The printability of a nanomaterials based ink depends largely on the rheological properties of the ink, which must meet the requirements of the printing process employed. Conventionally, such inks are made using organic solvents, surfactants and stabilizers. These additives, however, can cause reduced performance of the printed devices due to remnants within the printed layers.
Titanium carbide MXene nanosheets can be dispersed in water without any additives. By controlling the concentration, the rheology can be tuned to meet printable properties. We are employing a number of different printing techniques (stamping, ink-jetting, aerosol-jetting, direct extrusion) to fabricate devices across a broad range of resolutions.