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Neutrons for Science and Industry

Micelle-Assisted and Covalent Bonding-Mediated Formation of Nanoparticle Superlattices

by Prof. Sung-Min Choi (Department of Nuclear and Quantum Engineering, KAIST)

Europe/Berlin
Zoom Webinar

Zoom Webinar

https://tum-conf.zoom.us/j/61532699091 Passwort: 855847
Description

The nanoparticle superlattices (NPSLs) can exhibit new emerging properties through collective coupling between nanoparticles, which is dependent on the lattice symmetry and particle composition, providing new opportunities in a broad range of potential applications including plasmonic, optoelectronic, and catalytic applications. Various methods have been developed for the synthesis of NPSLs, which include slow solvent evaporation, antisolvent destabilization, DNA-mediation, electrostatic interaction and others. In our group, two different approaches to form NPSLs, the micelle-assisted method and the covalent bonding-mediated method, have been developed. The micelle-assisted method has been applied to 1D nanoparticles (single-walled carbon nanotubes) and spherical gold nanoparticles with which thermally reversible structural symmetry transitions of NPSLs have been demonstrated. Recently the covalent bonding-mediated method has been used to form gold nanoparticle superlattices which are very stable in solvent of different polarity as well as in a dried condition. In this presentation, small angle neutron and x-ray scattering investigations of these self-assembled NPSLs will be discussed.     

 

[1] S.-H. Lim, H.-S. Jang, J.-M. Ha, T.-H. Kim, P. Kwasniewski, T. Narayanan, K-S Jin an S.M Choi, "Highly Ordered and Highly Aligned Two-Dimensional Binary Superlattice of a SWNT/Cylindrical-Micellar System", Angew. Chem. Int. Ed., 53, 12548 (2014)

[2] S.-H. Lim, T. Lee, Y. Oh, T. Narayanan, B. J. Sung and S.-M. Choi*, “Hierarchically Self-Assembled Hexagonal Honeycomb and Kagome Superlattices of Binary 1D Colloids”, Nature Communications 8, 360 (2017)

[3] J.-M. Ha, S.-H. Lim, J. Dey, S.-J. Lee, M.-J. Lee, S.-H. Kang, K. S. Jin, and S.-M. Choi*, “Micelle-Assisted Formation of Nanoparticle Superlattices and Thermally Reversible Symmetry Transitions”, Nano Letters 19, 2313, (2019)

[4] J. Dey, S.-J. Lee, J. Kim, S.-H. Lim, J.-M. Ha, M.-J. Lee, and S.-M. Choi*, "Spontaneous Formation of Highly Stable Nanoparticle Supercrystals Driven by a Covalent Bonding Interaction", Nano Letters, 21, 258 (2021)

Organised by

Dr. Christian Franz
Dr. Jitae Park

Videoconference
Zoom Webinar
VC Room link
https://tum-conf.zoom.us/j/61080686733
Info
Password: 853708