Chiral Perovskite Nanocrystal Growth inside Helical Hollow Silica Nanoribbons
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Article de revue
Este ítem está publicado en
Nano Letters. 2023-04-13, vol. 23, n° 8, p. 3174-3180
Resumen en inglés
Helical perovskite nanocrystals (H-PNCs) were prepared using nanometric silica helical ribbons as platforms for the in situ growth of the crystals using the supersaturated recrystallization method. The H-PNCs grow inside ...Leer más >
Helical perovskite nanocrystals (H-PNCs) were prepared using nanometric silica helical ribbons as platforms for the in situ growth of the crystals using the supersaturated recrystallization method. The H-PNCs grow inside nanometric helical porous silica, and their handedness is determined by the handedness of porous silica templates. They show both strong induced circular dichroism (CD) and strong induced circularly polarized luminescence (CPL) signals, with high dissymmetry gfactors. Right-handed and left-handed PNCs show respectively positive and negative CD and CPL signals, with a dissymmetry gfactor (abs and lum) of ∼±2 × 10 −2. Simulations based on the boundary element method demonstrate that the circular dichroism originates from the chiral shape of H-PNCs.< Leer menos
Palabras clave en inglés
Silica nanohelices
perovskite nanocrystals
chiral shape
circular dichroism
circularly polarized luminescence
Centros de investigación