Imaging with time-of-flight secondary ion mass spectrometry (TOF-SIMS) has expanded very rapidly with the development of gold cluster ion sources (Au3+). It is now possible to acquire ion density maps (ion images) on a tissue section without any treatment and with a lateral resolution of few micrometers. In this article. we have taken advantage of this technique to study the degenerat... https://www.roamingfreesims.com/product-category/emergency-site-lighting/