Skip to main content
OSTI.GOVU.S. Department of Energy Office of Scientific and Technical Information
U.S. Department of Energy
Office of Scientific and Technical Information
 

Seeded Synthesis of CdSe/CdS Rod and Tetrapod Nanocrystals

Journal Article · · Journal of Visualized Experiments
DOI:https://doi.org/10.3791/50731· OSTI ID:1628635
 [1];  [2];  [3];  [4]
  1. Univ. of California, Berkeley, CA (United States). Dept. of Chemical Engineering; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Sciences Division; DOE/OSTI
  2. Univ. of California, Berkeley, CA (United States). Dept. of Materials Science and Engineering; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Sciences Division
  3. Univ. of Chicago, IL (United States). Dept. of Chemistry; Argonne National Lab. (ANL), Argonne, IL (United States). Center for Nanoscale Materials
  4. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Sciences Division; Univ. of California, Berkeley, CA (United States). Dept. of Chemistry
+ Show Author Affiliations

Here, we demonstrate a method for the synthesis of multicomponent nanostructures consisting of CdS and CdSe with rod and tetrapod morphologies. A seeded synthesis strategy is used in which spherical seeds of CdSe are prepared first using a hot-injection technique. By controlling the crystal structure of the seed to be either wurtzite or zinc-blende, the subsequent hot-injection growth of CdS off of the seed results in either a rod-shaped or tetrapod-shaped nanocrystal, respectively. The phase and morphology of the synthesized nanocrystals are confirmed using Xray diffraction and transmission electron microscopy, demonstrating that the nanocrystals are phase-pure and have a consistent morphology. The extinction coefficient and quantum yield of the synthesized nanocrystals are calculated using UV-Vis absorption spectroscopy and photoluminescence spectroscopy. The rods and tetrapods exhibit extinction coefficients and quantum yields that are higher than that of the bare seeds. This synthesis demonstrates the precise arrangement of materials that can be achieved at the nanoscale by using a seeded synthetic approach.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Argonne National Lab. (ANL), Argonne, IL (United States); Oak Ridge Associated Univ., Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division
Grant/Contract Number:
AC02-05CH11231; AC02-06CH11357; AC05-06OR23100
OSTI ID:
1628635
Journal Information:
Journal of Visualized Experiments, Journal Name: Journal of Visualized Experiments Journal Issue: 82; ISSN 1940-087X
Publisher:
MyJoVE Corp.Copyright Statement
Country of Publication:
United States
Language:
English

References (12)

Prospects of Colloidal Nanocrystals for Electronic and Optoelectronic Applications journal January 2010
Control of Photoluminescence Properties of CdSe Nanocrystals in Growth journal March 2002
Study of Nucleation and Growth in the Organometallic Synthesis of Magnetic Alloy Nanocrystals:  The Role of Nucleation Rate in Size Control of CoPt 3 Nanocrystals journal July 2003
On the Mechanism of Lead Chalcogenide Nanocrystal Formation journal October 2006
Mysteries of TOPSe Revealed: Insights into Quantum Dot Nucleation
  • Evans, Christopher M.; Evans, Meagan E.; Krauss, Todd D.
  • Journal of the American Chemical Society, Vol. 132, Issue 32, p. 10973-10975 https://doi.org/10.1021/ja103805s
journal August 2010
Alkyl Chains of Surface Ligands Affect Polytypism of CdSe Nanocrystals and Play an Important Role in the Synthesis of Anisotropic Nanoheterostructures journal November 2010
Synthesis and Characterization of Strongly Luminescing ZnS-Capped CdSe Nanocrystals journal January 1996
Synthesis and Micrometer-Scale Assembly of Colloidal CdSe/CdS Nanorods Prepared by a Seeded Growth Approach journal October 2007
Seeded Growth of Highly Luminescent CdSe/CdS Nanoheterostructures with Rod and Tetrapod Morphologies journal October 2007
The Trouble with TOPO; Identification of Adventitious Impurities Beneficial to the Growth of Cadmium Selenide Quantum Dots, Rods, and Wires journal October 2008
Multiexciton Engineering in Seeded Core/Shell Nanorods: Transfer from Type-I to Quasi-type-II Regimes journal October 2009
Timing matters: the underappreciated role of temperature ramp rate for shape control and reproducibility of quantum dot synthesis journal January 2012

Figures / Tables (2)

Figure 1(p. 5)figure Figure 1
Figure 2(p. 6)figure Figure 2

Similar Records

Seeded Growth of Highly Luminescent CdSe/CdS Nano-Heterostructures with Rod and Tetrapod Morphologies
Journal Article · Thu Aug 09 00:00:00 EDT 2007 · Nano Letters · OSTI ID:928955
Strain-Dependent Photoluminescence Behavior of CdSe/CdS Nanocrystals with Spherical, Linear, and Branched Topologies
Journal Article · Thu Aug 13 00:00:00 EDT 2009 · Nano Letters · OSTI ID:972713
Strain-dependent photoluminescence behavior in three geometries of CdSe/CdS nanocrystals
Journal Article · Tue May 26 00:00:00 EDT 2009 · Nature Materials · OSTI ID:986868

Related Subjects

36 MATERIALS SCIENCE
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
chemistry
nanocrystals
nanoheterostructures
nanostructures
science & technology
seeded rods
synthesis
tetrapods