LAMPSe | Greco Group Graz
New press release by TUGraz showcasing our tattoo electrodes for brain signals recordings, a study by Laura Ferrari (former PhD student, now postdoc in France) and made in collaboration with Esma Ismailova and her group at Bioelectronics Dept., École Nationale Supérieure des Mines de Saint-Étienne, France . Here the links to the full text of the press release and to press coverage.
Alexander Dallinger, Kirill Keller, Harald Fitzek, Francesco Greco
ACS Appl. Mater. Interfaces, 19855-19865
Publication Date: April 6, 2020
https://doi.org/10.1021/acsami.0c03148
The conversion of various polymer substrates into laser-induced graphene (LIG) with a CO2 laser in ambient condition is recently emerging as a simple method for obtaining patterned porous graphene conductors, with a myriad of applications in sensing, actuation, and energy. In this paper, a method is presented for embedding porous LIG (LIG-P) or LIG fibers (LIG-F) into a thin (about 50 μm) and soft medical grade polyurethane (MPU) providing excellent conformal adhesion on skin, stretchability, and maximum breathability to boost the development of various unperceivable monitoring systems on skin. The effect of varying laser fluence and geometry of the laser scribing on the LIG micro–nanostructure morphology and on the electrical and electromechanical properties of LIG/MPU composites is investigated. A peculiar and distinct behavior is observed for either LIG-P or LIG-F. Excellent stretchability without permanent impairment of conductive properties is revealed up to 100% strain and retained after hundreds of cycles of stretching tests. A distinct piezoresistive behavior, with an average gauge factor of 40, opens the way to various potential strain/pressure sensing applications. A novel method based on laser scribing is then introduced for providing vertical interconnect access (VIA) into LIG/MPU conformable epidermal sensors. Such VIA enables stable connections to an external measurement device, as this represents a typical weakness of many epidermal devices so far. Three examples of minimally invasive LIG/MPU epidermal sensing proof of concepts are presented: as electrodes for electromyographic recording on limb and as piezoresistive sensors for touch and respiration detection on skin. Long-term wearability and functioning up to several days and under repeated stretching tests is demonstrated.
A new paper by Laura Ferrari et al. about temporary tattoo electrodes for on-skin electrophysiological recordings, in collaboration with group of Prof. Esma Ismailova (BEL EMSE, France). Electroencephalographic (EEG) signals are recorded in a clinical environment.
Publication (Open Access) in npj Flexible Electronics:
Conducting polymer tattoo electrodes in clinical electro- and magneto-encephalography
Laura M. Ferrari, Usein Ismailov, Jean-Michel Badier, Francesco Greco & Esma Ismailova
npj Flex Electron 4, 4 (2020).
DOI: 10.1038/s41528-020-0067-z
https://www.nature.com/articles/s41528-020-0067-z
Latest issue of TU Graz research magazine focuses on Additive Manufacturing: the 3D Revolution. Tattoo skin-contact electrodes developed in our lab LAMPSE at Institute of Solid State Physics TU Graz are showcased in a short interview and a You-Tube Video.
Hannah Kaspret, a talented high school student, spent her summer as FIT (Frauen In Technik) intern at the Institute of Solid State Physics of TU Graz in Greco Group and Coclite Group laboratories and built flower petals out of polydimethylsiloxane that reacts to water vapour thanks to a thin coating of a responsive polymer.
Link to Full Story on TUGraz News
Video on TUGraz YouTube Channel:
New press release by TUGraz about our tattoo electrodes for on-skin biosignal recordings. Here the full text of the press release and some links to press coverage.
