Understanding the plasmon enhanced upconversion in translucent films through nanofocused X-ray fluorescence - Mattos, Elaine Andrade de; Piasentin, Rodrigo de Souza; Fritzen, Douglas Lourenço; Galante, Douglas; Teixeira, Veronica Carvalho; Rodrigues, Lucas Carvalho Veloso (Annual Users Meeting LNLS/CNPEM (RAU), 2022)