Langmuir-Blodgett Transfer of Nanocrystal Monolayers: Layer Compaction, Layer Compression, and Lattice Stretching of the Transferred Layer

Reken N Patel; Brian Goodfellow; Andrew T Heitsch; Detlef-M Smilgies; Brian A Korgel

doi:10.3390/nano14141192

Langmuir-Blodgett Transfer of Nanocrystal Monolayers: Layer Compaction, Layer Compression, and Lattice Stretching of the Transferred Layer

Nanomaterials (Basel). 2024 Jul 12;14(14):1192. doi: 10.3390/nano14141192.

Authors

Reken N Patel¹, Brian Goodfellow¹, Andrew T Heitsch¹, Detlef-M Smilgies^{2

3}, Brian A Korgel¹

Affiliations

¹ Department of Chemical Engineering, Center for Nano- and Molecular Science and Technology, Texas Materials Institute, The University of Texas at Austin, Austin, TX 78712, USA.
² Cornell High Energy Synchrotron Source (CHESS), Cornell University, Ithaca, NY 14853, USA.
³ R. F. Smith School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, NY 14853, USA.

Abstract

Grazing incidence small angle X-ray scattering (GISAXS) was used to study the structure and interparticle spacing of monolayers of organic ligand-stabilized iron oxide nanocrystals floating at the air-water interface on a Langmuir trough, and after transfer to a solid support via the Langmuir-Blodgett technique. GISAXS measurements of the nanocrystal arrangement at the air-water interface showed that lateral compression decreased the interparticle spacing of continuous films. GISAXS also revealed that Langmuir-Blodgett transfer of the nanocrystal layers to a silicon substrate led to a stretching of the film, with a significant increase in interparticle spacing.

Keywords: GISAXS; Langmuir–Blodgett transfer; monolayers; nanocrystals; self-assembly.

Abstract

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