Nanoparticles Investigation By Electron Microscopy And Interlaboratory Comparison Results Within The Programme Imera-Plus, Jrp T3 J1.1 Traceable Characterisation Of Nanoparticles Size

This paper presents some results obtained by investigations on different types of nanoparticles (metallic, silica, polystyrene) within the iMERA-Plus project JRP T3 J1.1 "Traceable characterisation of nanoparticles size".Some INM results obtained by TEM (Transmission Electron Microscopy) and SEM (Scanning Electron Microscopy) techniques are presented. The gold, silica and polystyrene materials from NIST, IRMM and DUKE providers, respectively, were investigated. After methods development, the consortium conducted an interlaboratories comparison where the measurements from several techniques were compared. The range of nanomaterials investigated was from 10 nm to 200 nm by various available techniques AFM, DLS, SAXS, SEM, and TSEM etc. In total 48 independent results were reported by all partners involved in the interlaboratory comparison. The data consistency was verified using the Birge criterion, the statistical Birge test as well as the En score (vertical bar En(95)vertical bar <= 1). A reference value within the associated uncertainty was provided in such a way to allow the cross-comparison between the measurement methods used applied.