Multi-material micro/ nano optofluidic 3D printing of complex structures using metals, semiconductors and carbon, not just polymers

https://www.eurekalert.org/news-releases/1114378

"2-photon polymerization largely restricted to polymers lacking key mechanical, electrical, magnetic properties, overcome using fs laser creating localized hot spot within liquid containing randomly dispersed micro- or nanoparticles... heat generates precise fluid flow (optofluidic interaction) propelling particles through small opening into prefabricated polymer mold which when removed leaves free-standing 3D object held together by van der Waals forces... multifunctional, micro-scale: sculptures, robotics"