2023/01/04 by Long Lin, Xiaogang Peng, Émilie Voirin +6 · 4 citations
Chemistry · Materials Science · Physics and Astronomy · #Chemical physics #Chemistry #Condensed matter physics #Crystallinity #Crystallography #Dipole #Electron #Gold and Silver Nanoparticles Synthesis and Applications #Lattice (music) #Magnetic moment #Magnetic nanoparticles #Materials science #Nanocluster Synthesis and Applications #Nanoparticle #Nanotechnology #Paramagnetism #Physics #Theoretical and Computational Physics
paper · open access · doi:10.1002/hlca.202200165
published in Helvetica Chimica Acta 106(3) (Wiley)
openalex publication_date 2023/01/04 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/22
Abstract The magnetic properties of noble‐metal nanoparticles are a puzzling phenomenon, tentatively often explained as a size effect or a ligand effect. Many experimental studies performed to date have attempted to vary these readily available parameters without reaching a definitive conclusion. In an attempt at better understanding the role of core crystallinity on these magnetic properties, we have compared the behavior of silver nanoparticles, which were either single‐crystalline or multi‐twinned, of almost identical sizes and with the same ligand coating. Our results indicate that single‐crystalline nanoparticles tend to behave as classical paramagnetic materials, whereas multi‐twinned ones exhibit a combination of para‐ and ferro‐magnetic behaviors. Our hypothesis is that lattice defects within the core bear magnetic moments which couple through conduction electrons, with dipolar interactions also playing a local and macroscopic role.