Tetsuya Kida

Weak Ferromagnetism in NiS 2 under Nanocrystallization

Structurally well-ordered NiS 2 nanocrystals with an average diameter of 27.0 ± 6.5 nm retain the bulk-like two-step antiferromagnetic transitions, as shown by magnetization and heat-capacity measurements. Below the lower transition, the nanocrystals exhibit a hysteretic ferromag...

Probing Lattice‐Oxygen Redox in Pt‐WO 3 Nanocrystals by Operando Spectroscopy: Bridging Surface Chemistry and Ethanol Sensing

ABSTRACT Understanding how lattice oxygen participates in gas sensing remains a challenge in metal‐oxide chemistry. Here, we combine operando diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS), operando Raman spectroscopy, ex situ electron paramagnetic resonance...

Element-SpecificSensitivity of Lanthanoid Ions toChiral Crystal Fields in K3[Ln2(NO3)9] Probed by 4f–4f Circular Dichroism

Abstract For chiral inorganic crystals composed of achiral components, chiral crystal fields around metal ions are expected to play a key role in the emergence of chiroptical properties. Circular dichroism (CD) spectra can serve as useful probes of such chiral crystal fields. Her...