Quenching of the upconversion luminescence of NaYF4_Yb3+,Er3+ and NaYF4_Yb3+,Tm3+ nanophosphors by water_ the role of the sensitizer Yb3+ in non-radiative relaxation - download at 4shared. Quenching of the upconversion luminescence of NaYF4_Yb3+,Er3+ and NaYF4_Yb3+,Tm3+ nanophosphors by water_ the role of the sensitizer Yb3+ in non-radiative relaxation is hosted at free file sharing service 4shared.