Spontaneous Superlattice Formation in Nanorods through PartialCation Exchange

Journal Article · Wed Mar 14 04:00:00 EDT 2007 · Science

DOI:https://doi.org/10.1126/science.1142593· OSTI ID:929313

Robinson, Richard D; Sadtler, Bryce; Demchenko, Denis O; Erdonmez, Can K; Wang, Lin-Wang; Alivisatos, A Paul

Lattice mismatch strains are widely known to controlnanoscale pattern formation in heteroepitaxy, but such effects have notbeen exploited in colloidal nanocrystal growth. We demonstrate acolloidal route to synthesizing CdS-Ag2S nanorod superlattices throughpartial cation exchange. Strain induces the spontaneous formation ofperiodic structures. Ab initio calculations of the interfacial energy andmodeling of strain energies show that these forces drive theself-organization. The nanorod superlattices exhibit high stabilityagainst ripening and phase mixing. These materials are tunablenear-infrared emitters with potential applications as nanometer-scaleoptoelectronic devices.

• Research Organization: Ernest Orlando Lawrence Berkeley NationalLaboratory, Berkeley, CA (US)
• Sponsoring Organization: USDOE Director. Office of Science. Basic EnergySciences
• DOE Contract Number: AC02-05CH11231
• OSTI ID: 929313
• Report Number(s): LBNL--62650; BnR: KC0203010
• Journal Information: Science, Journal Name: Science Journal Issue: 5836 Vol. 317; ISSN 0193-4511; ISSN SCEHDK
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CATIONS
RIPENING
SIMULATION
STABILITY
STRAINS
SUPERLATTICES
cation exchange nanorod superlattice strain-mediated growthnanocrystals colloidal