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Supercrystal formation of gold nanorods by high pressure stimulation

DOI: 10.1021/acs.jpcc.9b08173 DOI Help

Authors: Martin A. Schroer (European Molecular Biology Laboratory (EMBL)) , Felix Lehmkuehler (Deutsches Elektronen-Synchrotron DESY; The Hamburg Centre for Ultrafast Imaging (CUI)) , Verena Markmann (Deutsches Elektronen-Synchrotron DESY) , Lara Frenzel (Deutsches Elektronen-Synchrotron DESY; The Hamburg Centre for Ultrafast Imaging (CUI)) , Johannes Moeller (European XFEL) , Holger Lange (University of Hamburg; The Hamburg Centre for Ultrafast Imaging (CUI)) , Gerhard GrĂ¼bel (Deutsches Elektronen-Synchrotron DESY; The Hamburg Centre for Ultrafast Imaging (CUI)) , Florian Schulz (University of Hamburg, The Hamburg Centre for Ultrafast Imaging (CUI))
Co-authored by industrial partner: No

Type: Journal Paper
Journal: The Journal Of Physical Chemistry C

State: Published (Approved)
Published: November 2019
Diamond Proposal Number(s): 18875

Abstract: We demonstrate the pressure-induced formation of supercrystals made from PEGylated gold nanorods in aqueous suspension. Utilizing the combined effect of hydrostatic pressure and salt on the solubility of the organic PEG shell that passivates the nanorods, the reversible formation of two-dimensional hexagonal supercrystals has been observed by means of small angle X-ray scattering. The pressure dependence of the crystal lattice's structural parameters is determined. By time-resolved measurements performed after a pressure-jump, the growth process of the crystals is found to be finished already after a few seconds. The presented results demonstrate that by PEGylating nanoparticles pressure-induced homogeneous supercrystals can be formed for different particle shapes, in particular anisotropic nanorods, which determine the resulting lattice type.

Journal Keywords: Crystals; Crystallization; Ligands; Lattices; X-ray scattering

Subject Areas: Chemistry


Instruments: I22-Small angle scattering & Diffraction

Added On: 18/11/2019 09:35

Discipline Tags:

Physical Chemistry Chemistry Nanoscience/Nanotechnology

Technical Tags:

Scattering Small Angle X-ray Scattering (SAXS)