%0 Unpublished work
%T Highly Polarized Light Emission from 6T@BNNT Nanohybrids
%+ Laboratoire Charles Coulomb (L2C)
%A Badon, A.
%A Allard, C.
%A Fossard, F.
%A Loiseau, A.
%A Cognet, L.
%A Flahaut, E.
%A Izard, Nicolas
%A Martel, R.
%A Gaufrès, E.
%8 2021-10-28
%D 2021
%Z 2101.01410
%Z Physics [physics]/Condensed Matter [cond-mat]/Other [cond-mat.other]Preprints, Working Papers, ...
%X The polarized fluorescence emission of organic fluorophores has been extensively studied in photonics and is increasingly exploited in single molecule scale bio-imaging. Expanding the polarization properties of compact molecular assemblies is, however, extremely challenging due to depolarization and quenching effects associated with the self-aggregation of molecules into the sub-nanometer scale. Here we demonstrate that Boron Nitride Nanotubes (BNNTs) can act as a 1D host-template for the alignment of encapsulated a-sexithiophene (6T) inside BNNTs, leading to an optically active 6T@BNNT nanohybrid. We show that the fluorescence from the nanohybrid is strongly polarized with extinction ratios as high as 700 at room temperature. A statistical analysis of the 6T orientation inside BNNTs with inner diameter up to 1.5 nm shows that at least 80% of the encapsulated 6Ts exhibit a maximum deviation angle of less than 10{\deg} with respect to the BNNT axis. Despite a competition between molecule-molecule and molecule-BNNT adsorption in larger BNNTs, our results also show that more than 80% of the molecules display a preferential orientation along the BNNT axis with a deviation angle below 45{\deg}.
%G English
%L hal-03406977
%U https://hal.science/hal-03406977
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