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Lamellar Peptide–Cadmium‐Doped Zinc Oxide Nanohybrids That Emit White Light
Author(s) -
Manna Manoj K.,
Verma Shruti,
Mukherjee Shaibal,
Das Apurba K.
Publication year - 2016
Publication title -
chempluschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.801
H-Index - 61
ISSN - 2192-6506
DOI - 10.1002/cplu.201500402
Subject(s) - zinc , chemistry , lamellar structure , photoluminescence , inorganic chemistry , cadmium , wurtzite crystal structure , materials science , crystallography , organic chemistry , optoelectronics
A variety of hybrid nanostructures have been developed that emit white light. Two different white‐light‐emitting systems are reported. These are cadmium‐doped zinc oxide nanosheets and complex lamellar nanostructures that consist of alternating inorganic cadmium‐doped zinc oxide domains with the self‐assembled aromatic‐capped peptide BPI‐FF‐OH (BPI: benzo[ ghi ]perylene monoimide, F: d ‐phenylalanine). An electrochemical method is employed to synthesize cadmium‐doped zinc oxide nanosheets and lamellar organic/cadmium‐doped zinc oxide nanoflakes on a gallium‐doped ZnO/p‐Si (111) substrate. External structural features and internal structural ordering of wurtzite cadmium‐doped zinc oxide and lamellar organic/cadmium‐doped zinc oxide nanohybrids are characterized by small‐angle X‐ray scattering, XRD, field‐emission SEM, energy‐dispersive X‐ray spectroscopy, secondary‐ion mass spectrometry, ellipsometry, and photoluminescence spectroscopy. Cadmium‐doped zinc oxide nanosheets and lamellar organic/cadmium‐doped zinc oxide hybrids emit white light with a broad emission covering the visible spectrum from λ =415 to 700 nm. Characteristic white‐light emissions of both materials were well characterized by photoluminescence studies. The white‐light luminescence is attributed to cadmium doping in the zinc oxide crystal and the presence of the dipeptide‐functionalized BPI fluorophore in the lamellar nanohybrid.