Materials for New Functions of Micro/Nanorobots for Biomedical Applications

The performance of micro/nanorobots is largely influenced by the materials used in their construction. This presentation will explore a variety of micro/nanorobots engineered from distinct materials tailored to their specific functionalities. We will initially discuss robots made from quantum dots (QDs) and magnetoelectric (ME) nanoparticles, focusing on their application in medical and biological fields. QDs enhance capabilities in bioimaging through shortwave infrared (SWIR) imaging, which offers deep tissue penetration without ionizing radiation. We will introduce a QD-based magnetic guidewire designed for X-ray-free detection and precise magnetic navigation under SWIR imaging. Additionally, QDs have been utilized in the fabrication of microrobots using a photocurable photoresist, processed via two-photon polymerization (TPP). These microrobots are detectable by SWIR systems, enhancing their applicability in targeted medical applications. ME nanoparticles have been employed to develop nanorobots capable of stimulating neuronal cells through external magnetic fields. These magnetoelectric nanorobots show promise for applications in deep brain stimulation, featuring remote actuation and electrical stimulation capabilities without direct contact. Overall, the integration of QD and ME nanoparticles into micro/nanorobots opens up new possibilities for advanced biomedical applications, demonstrating significant potential in medical procedures and targeted therapeutic interventions.