Light-Induced Paramagnetism in Colloidal Ag+-Doped CdSe Nanoplatelets
Journal of Physical Chemistry Letters, cilt.12, sa.11, ss.2892-2899, 2021 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 12 Sayı: 11
- Basım Tarihi: 2021
- Doi Numarası: 10.1021/acs.jpclett.1c00398
- Dergi Adı: Journal of Physical Chemistry Letters
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, Compendex, EMBASE, MEDLINE
- Sayfa Sayıları: ss.2892-2899
- Sağlık Bilimleri Üniversitesi Adresli: Evet
Özet
We describe a study of the magneto-optical properties of Ag+-doped CdSe colloidal nanoplatelets (NPLs) that were grown using a novel doping technique. In this work, we used magnetic circularly polarized luminescence and magnetic circular dichroism spectroscopy to study light-induced magnetism for the first time in 2D solution-processed structures doped with nominally nonmagnetic Ag+ impurities. The excitonic circular polarization (PX) and the exciton Zeeman splitting (Î"EZ) were recorded as a function of the magnetic field (B) and temperature (T). Both Î"EZ and PX have a Brillouin-function-like dependence on B and T, verifying the presence of paramagnetism in Ag+-doped CdSe NPLs. The observed light-induced magnetism is attributed to the transformation of nonmagnetic Ag+ ions into Ag2+, which have a nonzero magnetic moment. This work points to the possibility of incorporating these nanoplatelets into spintronic devices, in which light can be used to control the spin injection.