2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/95136In nanocrystalline Nb films, the superconducting Tc decreases with a reduction in the average particle size below 20nm. We correlate the decrease in Tc with a reduction in the superconducting energy gap measured by point contact spectroscopy. Consistent with the Anderson criterion, no superconducting transition was observed for sizes below 8 nm. We show that the size-dependence of the superconducting properties in this intermediate coupling Type II superconductor is governed by changes in the electronic density of states rather than by phonon softening.pdf format 14 pages 4 figures (included)SuperconductivityMesoscale and Nanoscale Physicstext