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Construction of NaREF4-based binary and bilayer nanocrystal assemblies.

Tao Zheng¹, Ling-Dong Sun, Jia-Cai Zhou

¹Beijing National Laboratory for Molecular Sciences, Peking University, Beijing 100871, China.

Chemical Communications (Cambridge, England)

|February 19, 2013

Summary

Monodispersed nanocrystals form ordered binary superlattices for photonics. Lanthanide-doped NaREF4 assemblies exhibit multicolor upconversion emissions, enabling advanced optical applications.

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Area of Science:

Materials Science
Nanotechnology
Photonics

Background:

Monodispersed nanocrystals (NCs) are building blocks for advanced materials.
Ordered assemblies of NCs enable unique functional properties.
Lanthanide-doped materials are known for luminescent properties.

Purpose of the Study:

To construct functional binary nanocrystal superlattices (BNSLs) and bilayer assemblies.
To utilize lanthanide-doped NaREF4 (RE = Y, Gd) for novel optical materials.
To explore multicolor upconversion (UC) emissions from these assemblies.

Main Methods:

Synthesis of monodispersed NaREF4 (RE = Y, Gd) nanocrystals.
Employing various assembly techniques to form BNSLs and bilayer structures.

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Characterization of superlattice formation and optical properties.

Main Results:

Successful construction of diverse functional BNSLs and bilayer assemblies.
Demonstration of multicolor upconversion (UC) emissions from the assemblies.
Correlation between assembly structure and optical performance.

Conclusions:

Lanthanide-doped NaREF4 nanocrystal assemblies offer a versatile platform for photonics.
The ability to form ordered superlattices is key to achieving multicolor UC emissions.
These findings pave the way for advanced photonic devices utilizing nanocrystal assemblies.