Spontaneous Superlattice Formation in Nanorods through PartialCation Exchange

Journal Article · Wed Mar 14 00:00:00 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: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
• Sponsoring Organization: USDOE Director. Office of Science. Basic EnergySciences
• DOE Contract Number: DE-AC02-05CH11231
• OSTI ID: 929313
• Report Number(s): LBNL-62650; SCEHDK; R&D Project: 508401; BnR: KC0203010; TRN: US200813%%183
• Journal Information: Science, Vol. 317, Issue 5836; Related Information: Journal Publication Date: 07/20/2007; ISSN 0193-4511
• Country of Publication: United States
• Language: English

Related Subjects

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37
75
CATIONS
RIPENING
SIMULATION
STABILITY
STRAINS
SUPERLATTICES
cation exchange nanorod superlattice strain-mediated growthnanocrystals colloidal