Dr. Hagay Shpaisman, Department of Chemistry & Institute for Nanotechnology and Advanced Materials,Bar-Ilan University, Israel is going to attend 2nd International Conference on Nanomaterials and Nanotechnology scheduled on May 16-17, 2019 at Prague, Czech Republic

Dr. Hagay Shpaisman, Department of Chemistry & Institute for Nanotechnology and Advanced Materials, Bar-Ilan University, Israel is going to attend 2nd International Conference on Nanomaterials and Nanotechnology scheduled on May 16-17, 2019 at Prague, Czech Republic. For more details: https://bit.ly/2LNiYuz

Title: Photo-Thermal Directed Assembly

Micro-patterning of various materials was recently developed based on the laser-induced microbubble technique (LIMBT). LIMBT relies on the formation of a microbubble due to laser heating of a dispersion of nanoparticles (NPs) that absorb the laser light. Natural and Marangoni convection currents carry the NPs to the bubble/substrate interface where some of them are pinned. Moving the substrate relative to the laser beam results in deposition of NPs along a predetermined path. Unfortunately, for many materials this deposition is non-continuous.

We have recently found¹ that controlling the construction and destruction of the microbubble through modulation of the laser enables the formation of continuous patterns by preventing the microbubble from getting pinned to the deposited material. Furthermore, we show that microstructure formation from an ion solution could be explained by a similar mechanism. Photo-thermal reduction of the ion solution leads to formation of NPs. These NPs are then pinned to the bubble/substrate interface. This innovative approach can be applicable for producing thin conductive patterns and allow fabrication of microelectronic devices and sensors.