Three-dimensional superlattice of PbS quantum dots in flakes
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In the last two decades, many experiments were
conducted in self-organization of nanocrystals into two- and
three-dimensional (3D) superlattices and the superlattices
were synthesized and characterized by different techniques,
revealing their unusual properties. Among all characterization
techniques, X-ray diffraction (XRD) is the one that has
allowed the confirmation of the 3D superlattice formation due
to the presence of sharp and intense diffraction peaks. In this
work, we study self-organized superlattices of quantum dots of
PbS prepared by dropping a monodispersed colloidal solution on a glass substrate at different temperatures. We showed that the
intensity of the low-angle XRD peaks depends strongly on the drying time (substrate temperature). We claim that the peaks are
originated from the 3D superlattice. Scanning electron microscopy images show that this 3D superlattice (PbS quantum dots) is
formed in flake’s shape, parallel to the substrate surface and randomly oriented in the perpendicular planes.
Como referenciar
ERMAKOV, VIKTOR A.; SILVA FILHO, JOSE M.C. da; BONATO, LUIZ G.; MOGILI, NAGA V.V.; MONTORO, FABIANO E.; IIKAWA, FERNANDO; NOGUEIRA, ANA F.; CESAR, CARLOS L.; JIMENEZ-VILLAR, ERNESTO; MARQUES, FRANCISCO C. Three-dimensional superlattice of PbS quantum dots in flakes. ACS Omega, v. 3, n. 2, p. 2027-2032, 2018. DOI: 10.1021/acsomega.7b01791. Disponível em: http://repositorio.ipen.br/handle/123456789/28944. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.