XVII University Awards “Archimedes” of Introduction to Scientific Research

First Prize in the Area of Experimental, Exact and Environmental Sciences


"Spontaneous Formation of Core-Shell Nanoparticles of Au-SiO2 at the tip of Silicon Nanowires Revealed by Scanning Electron Microscopy at Very Low Voltages"


By Laura Zarraoa Sardón (Autonomous University of Madrid) and supervised by Álvaro San Paulo Hernando , Tenured Scientist at the Institute of Micro and Nanotechnology.




The extraordinary imaging power potential of scanning electron microscopy when the electron beam hits the sample with very low energy (<1 keV) has been known for decades. However, only the latest generation instruments reach ultra high resolution (<1 nm) under these conditions. In this work, the structure of the tip os Si nanowires grown via the vapor-liquid-solid mechanism is investigated by applying this technique. We have discovered the spontaneous formation of gold-silica core-shell structures at the tip of the nanowires, demonstrating the exceptional potential of this technique for the study of low dimensional nanostructures.




Latest Posts

  • Montserrat Calleja, winner of the Jaume I Award in New Technologies 2022

    Montserrat Calleja Gómez has been awarded the Rei Jaume I Prize in New Technologies 2022 for her work in the application of the main advances in basic research in physics to practical innovations in the clinical field. Specifically, the awards jury highlighted her work on biomolecular markers and nanomechanical sensors for the early detection of…