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New Modular Calamitic Ligands for Self-Assembly of Thermostable Quantum Dot Microcapsules via Nematic Templating

preprint
submitted on 16.09.2018, 07:51 and posted on 18.09.2018, 15:14 by Amir Keshavarz, Sheida Riahinasab, Linda Hirst, Ben Stokes
The design, synthesis, properties, and performance of a new class of promesogenic calamitic side-tethering organic ligands used to direct quantum dot nanoparticle self-assembly via nematic templating are described. This work was motivated by inadequate modularity, step count, and yield associated with syntheses of existing ligands. Attaching the new ligands to quantum dots and dispersing them in a liquid crystal host affords hollow micron-sized capsules via nematic templating. The capsules resist thermal decomposition up to 350 °C — significantly higher than any previously reported microcapsules assembled from side-tethering calamitic ligand-functionalized nanoparticle. Evaluation of the capsules by small-angle X-ray scattering shows that interparticle spacing varies from 10–13 nm depending on the ligand used, and is correlated to aminoalkyl chain length.

Funding

NSF CBET 1507551

History

Email Address of Submitting Author

bstokes2@ucmerced.edu

Institution

University of California, Merced

Country

USA

ORCID For Submitting Author

0000-0002-5982-654X

Declaration of Conflict of Interest

Provisional patent (U.S. no. 62/579,720) has been filed.

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