Control of Self-Assembly in Hierarchical Organic Nanoparticles

POSTER

Abstract

Semi-dilute nanoparticles tend to cluster in order to reduce surface area. Clustering can be controlled using surfactants. In this work a polyethelene oxide (PEO) based surfactant, Triton X-100®, is used to control clustering of an organic pigment. PEO displays a lower critical solution temperature (LCST) at 66 °C. It has been found that reduced miscibility in the vicinity of the LCST can be used to control clustering. For small clusters significant aggregation occurs while for sufficiently large clusters aggregation does not occur. In this way a thermally controlled hierarchical structure can be produced. The thermally tuned hierarchical structure can be locked in using chemically modified surfactant.

*This work was supported by the NSF[NSF CMMI 1635865]; the Argonne national lab [APS DOE DE-AC02-06CH1135];

Presenters

  • jianqi wang

    • Chemical and Materials Engineering, University of Cincinnati

Authors

  • jianqi wang

    • Chemical and Materials Engineering, University of Cincinnati

  • Kabir Rishi

    • Chemical and Materials Engineering, University of Cincinnati
    • University Of Cincinnati
    • Dept. Chem. and Mat. Eng., University of Cincinnati
    • University of Cincinnati

  • Tucker McKenzie

    • Department of Chemistry, University of Cincinnati

  • Greg Beaucage

    • Chemical and Materials Engineering, University of Cincinnati
    • University Of Cincinnati
    • Dept. Chem. and Mat. Eng., University of Cincinnati
    • University of Cincinnati

  • Neil Ayres

    • Department of Chemistry, University of Cincinnati

  • Jan Ilavsky

    • Argonne National Lab
    • Argonne National Laboratory

  • Ivan Kuzmenko

    • Argonne National Laboratory
    • Argonne National Lab
    • Advanced Photon Source, Argonne National Laboratory