Work

Seeded Growth of Highly Luminescent CdSe/CdS Nanoheterostructures with Rod and Tetrapod Morphologies

Year: 2007

Type: article

Abstract: We have demonstrated that seeded growth of nanocrystals offers a convenient way to design nanoheterostructures with complex shapes and morphologies by changing the crystalline structure of the seed. By using CdSe nanocrystals with wurtzite and zinc blende structure as seeds for growth of CdS nanorods, we synthesized CdSe/CdS heterostructure nanorods and nanotetrapods, respectively. Both of these structures showed excellent luminescent properties, combining high photoluminescence efficiency (approximately 80 and approximately 50% for nanorods and nanotetrapods, correspondingly), giant extinction coefficients (approximately 2 x 10(7) and approximately 1.5 x 10(8) M(-1) cm(-1) at 350 nm for nanorods and nanotetrapods, correspondingly), and efficient energy transfer from the CdS arms into the emitting CdSe core.

Source: Nano Letters

DOI: 10.1021/nl072003g

Authors: Dmitri V. Talapin, James H. Nelson, Elena V. Shevchenko, Shaul Aloni, Bryce Sadtler, A. Paul Alivisatos

Institutions: Lawrence Berkeley National Laboratory, Molecular Foundry, University of California, Berkeley

Language: English

Topic: Quantum Dots Synthesis And Properties

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: green

Funders: U.S. Department of Energy, Office of Science, Basic Energy Sciences, Division of Materials Sciences and Engineering