Journal Article

PUBDB-2016-03505

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Tuning the Interaction of Nanoparticles from Repulsive to Attractive by Pressure

Schroer, M. (Corresponding author)EMBL* ; Schulz, F.Extern* ; Lehmkuehler, F.DESY* ; Moeller, J.Extern* ; Smith, A. J. ; Lange, H.Extern* ; Vossmeyer, T.Extern* ; Gruebel, G.DESY*

2016
Soc. Washington, DC

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Please use a persistent id in citations: doi:10.1021/acs.jpcc.6b06847

Abstract: We report a high pressure small-angle X-ray scattering (SAXS) study on concentrated aqueous suspensions of gold nanoparticles coated with a poly(ethylene glycol) (PEG)-based ligand shell. Analyzing the experimental SAXS data with a liquid-state theory approach, we find a pressure-induced transition of the interparticle interactions from repulsive to attractive in the pressure range from 1 to 4000 bar that also depends on the particle concentration. This transition is related to structural changes of the ligand shell which is compressed with increasing pressure. Our study highlights the important, yet unexplored role of pressure for the interaction of nanoparticle systems.

Note: (c) American Chemical Society. Post referee full text in progress (embargo 1 year from August 15, 2016).

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Contributing Institute(s):

1. Coherent X-ray Scattering (FS-CXS)
2. DOOR-User (DOOR)

Research Program(s):

1. 6215 - Soft Matter, Health and Life Sciences (POF3-621) (POF3-621)

Experiment(s):

1. Measurement at external facility

Appears in the scientific report 2016

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Database coverage:
; Current Contents - Physical, Chemical and Earth Sciences ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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