Synthesis and micrometer-scale assembly of colloidal CdSe/CdS nanorods prepared by a seeded growth approach.
Key limitations of the colloidal semiconductor nanorods that have been reported so far are a significant distribution of lengths and diameters as well as the presence of irregular shapes produced by the current synthetic routes and, finally, the poor ability to fabricate large areas of oriented nanorod arrays. Here, we report a seeded-growth approach to the synthesis of asymmetric core-shell CdSe/CdS nanorods with regular shapes and narrow distributions of rod diameters and lengths, the latter being easily tunable up to 150 nm. These rods are highly fluorescent and show linearly polarized emission, whereby the emission energy depends mainly on the core diameter. We demonstrate their lateral alignment as well as their vertical self-alignment on substrates up to areas of several square micrometers.
Carbone
Luigi
L
NNL-National Nanotechnology Laboratory of CNR-INFM and IIT Research Unit, via per Arnesano, km 5, 73100 Lecce, Italy.
Nobile
Concetta
C
De Giorgi
Milena
M
Sala
Fabio Della
FD
Morello
Giovanni
G
Pompa
Pierpaolo
P
Hytch
Martin
M
Snoeck
Etienne
E
Fiore
Angela
A
Franchini
Isabella R
IR
Nadasan
Monica
M
Silvestre
Albert F
AF
Chiodo
Letizia
L
Kudera
Stefan
S
Cingolani
Roberto
R
Krahne
Roman
R
Manna
Liberato
L
D019187:Cadmium Compounds / Q000737:chemistry*; D003460:Crystallization / Q000379:methods*; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008968:Molecular Conformation; D036103:Nanotechnology / Q000379:methods*; D043942:Nanotubes / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D018036:Selenium Compounds / Q000737:chemistry*; D013050:Spectrometry, Fluorescence / Q000379:methods*; D013440:Sulfides / Q000737:chemistry*; D013499:Surface Properties
D019187:Cadmium Compounds; D046911:Macromolecular Substances; D018036:Selenium Compounds; D013440:Sulfides; C034939:cadmium sulfide; C058667:cadmium selenide