SANS study of mixed cholesteric cellulose nanocrystal – gold nanorod suspensions

Jonas Van Rie; Guillermo González-Rubio; Sugam Kumar; Christina Schütz; Joachim Kohlbrecher; Michèle Vanroelen; Tom Van Gerven; Olivier Deschaume; Carmen Bartic; Luis M. Liz-Marzán; German Salazar-Alvarez; Wim Thielemans

doi:10.1039/D0CC04845C

SANS study of mixed cholesteric cellulose nanocrystal – gold nanorod suspensions†

Jonas Van Rie,

^a Guillermo González-Rubio,

^b Sugam Kumar,

‡^c Christina Schütz,

^a Joachim Kohlbrecher,^d Michèle Vanroelen,^e Tom Van Gerven,^e Olivier Deschaume,

^f Carmen Bartic,

^f Luis M. Liz-Marzán,

^bg German Salazar-Alvarez^c and Wim Thielemans

*^a

Author affiliations

* Corresponding authors

^a Sustainable Materials Lab, Department of Chemical Engineering, KU Leuven, Campus Kulak Kortrijk, Etienne Sabbelaan 53, Kortrijk 8500, Belgium
E-mail: Wim.Thielemans@kuleuven.be

^b CIC biomaGUNE, Basque Research and Technology Alliance (BRTA), Paseo de Miramon 182, 20014 Donostia-San Sebastian, Spain

^c Department of Materials Science and Engineering, Ångström Laboratory, Uppsala University, Box 534, Uppsala 751 21, Sweden

^d Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institute, Villigen CH-5232, Switzerland

^e Department of Chemical Engineering, KU Leuven, Celestijnenlaan 200F, Leuven 3001, Belgium

^f Soft Matter and Biophysics Unit, Department of Physics and Astronomy, KU Leuven, Celestijnenlaan 200 D, Leuven 3001, Belgium

^g Ikerbasque, Basque Foundation for Science, 48013 Bilbao, Spain

Abstract

Self-assembly of cellulose nanocrystals (CNCs) doped with anisotropic gold nanorods (AuNRs) was studied by small-angle neutron scattering. Correlation distances and structured domains were analysed to determine the influence of CNC and AuNR concentration on structuring. The transfer of the nematic structure of CNCs to AuNRs is explained in terms of an entropy-driven evolution from an isotropic to a cholesteric phase, with small nematic domains already present in the “isotropic” phase in equilibrium with the chiral nematic phase.

Chemical Communications

SANS study of mixed cholesteric cellulose nanocrystal – gold nanorod suspensions†

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