A Combined SAXS/SANS Study for the in Situ Characterization of Ligand Shells on Small Nanoparticles: The Case of ZnO

Langmuir : the ACS Journal of Surfaces and Colloids
T SchindlerT Unruh

Abstract

ZnO nanoparticles (NPs) have great potential for their use in, e.g., thin film solar cells due to their electro-optical properties adjustable on the nanoscale. Therefore, the production of well-defined NPs is of major interest. For a targeted production process, the knowledge of the stabilization layer of the NPs during and after their formation is of particular importance. For the study of the stabilizer layer of ZnO NPs prepared in a wet chemical synthesis from zinc acetate, only ex situ studies have been performed so far. An acetate layer bound to the surface of the dried NPs was found; however, an in situ study which addresses the stabilizing layer surrounding the NPs in a native dispersion was missing. By the combination of small angle scattering with neutrons and X-rays (SANS and SAXS) for the same sample, we are now able to observe the acetate shell in situ for the first time. In addition, the changes of this shell could be followed during the ripening process for different temperatures. With increasing size of the ZnO core (d(core)) the surrounding shell (d(shell)) becomes larger, and the acetate concentration within the shell is reduced. For all samples, the shell thickness was found to be larger than the maximum exten...Continue Reading

References

Sep 21, 2002·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Gerko OskamPeter C Searson
Dec 20, 2002·Angewandte Chemie·Claudia PacholskiHorst Weller
Jan 7, 2014·Langmuir : the ACS Journal of Surfaces and Colloids·Matthew P ShortellEric R Waclawik
Jun 9, 2014·The Journal of Chemical Physics·Martin SchmieleTobias Unruh
Sep 10, 2014·The Journal of Physical Chemistry. B·Simone GehrerTobias Unruh

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Citations

Feb 7, 2016·Biochimica Et Biophysica Acta·Rixiang Huang, Boris L T Lau
May 10, 2016·Chemical Communications : Chem Comm·Agnieszka GralaJanusz Lewiński
Aug 31, 2016·Topics in Current Chemistry·Freddy T Rabouw, Celso de Mello Donega
Feb 16, 2017·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Rebecca DinkelBjörn Braunschweig
Jun 29, 2017·Chemistry : a European Journal·Małgorzata Wolska-PietkiewiczJanusz Lewiński
Apr 19, 2019·Journal of Applied Crystallography·Sebastian W KraussMirijam Zobel
Jul 21, 2020·Journal of Applied Crystallography·Ezzeldin MetwalliTobias Unruh
Sep 25, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Isabel SchuldesTobias Unruh
May 25, 2018·Langmuir : the ACS Journal of Surfaces and Colloids·Claudia KästnerAndreas F Thünemann

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