Monitoring self-assembly and ligand exchange of PbS nanocrystal superlattices at the liquid/air interface in real time

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dc.contributor.author Maiti, Santanu
dc.contributor.author André, Alexander
dc.contributor.author Banerjee, Rupak
dc.contributor.author Hagenlocher, Jan
dc.contributor.author Konovalov, Oleg
dc.contributor.author Schreiber, Frank
dc.contributor.author Scheele, Marcus
dc.date.accessioned 2018-02-13T11:46:21Z
dc.date.available 2018-02-13T11:46:21Z
dc.date.issued 2018-01
dc.identifier.citation Maiti, Santanu; André, Alexander; Banerjee, Rupak; Hagenlocher, Jan; Konovalov, Oleg; Schreiber, Frank and Scheele, Marcus, “Monitoring self-assembly and ligand exchange of PbS nanocrystal superlattices at the liquid/air interface in real time”, The Journal of Physical Chemistry Letters, DOI: 10.1021/acs.jpclett.7b03278, vol. 9, pp. 739-744, Jan. 2018. en_US
dc.identifier.issn 1948-7185
dc.identifier.uri http://repository.iitgn.ac.in/handle/123456789/3451
dc.identifier.uri http://dx.doi.org/10.1021/acs.jpclett.7b03278
dc.description.abstract We investigate in situ the structural changes during self-assembly of PbS nanocrystals from colloidal solution into superlattices, solvent evaporation, and ligand exchange at the acetonitrile/air interface by grazing incidence small-angle X-ray scattering (GISAXS). We simulate and fit the diffraction peaks under the distorted wave Born approximation (DWBA) to determine the lattice parameters. We observe a continuous isotropic contraction of the superlattice in two different assembly steps, preserving the body-centered cubic lattice with an overall decrease in the lattice constants of 11%. We argue that the first contraction period is due to a combination of solvent evaporation/annealing and capillary forces acting on the superlattice, whereas the second period is dominated by the effect of replacing oleic acid on the nanocrystal surface with the short and rigid cross-linker tetrathiafulvalene dicarboxylate. This work provides guidelines for optimized ligand exchange conditions and highlights the structural particularities arising from assembling NCs on liquid surfaces. en_US
dc.description.statementofresponsibility Santanu Maiti ; Alexander André; Rupak Banerjee§ ; Jan Hagenlocher; Oleg Konovalov∥ ; Frank Schreiber ; Marcus Scheele
dc.format.extent Vol. 9,no. 4, pp. 739-744
dc.language.iso en en_US
dc.publisher American chemical Society en_US
dc.title Monitoring self-assembly and ligand exchange of PbS nanocrystal superlattices at the liquid/air interface in real time en_US
dc.type Article en_US
dc.relation.journal Journal of Physical Chemistry Letters


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