Journal
ACS APPLIED NANO MATERIALS
Volume 5, Issue 7, Pages 10047-10054Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsanm.2c02496
Keywords
Au nanoclusters; coassembly; luminescent; hydrogel; information encryption
Funding
- National Natural Science Foundation of China [21573126, 22002069]
- Natural Science Foundation of Shandong Province, China [ZR2020QB062, ZR2021MB004]
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This study investigates the coassembly behavior of AuNCs modified with PRT and TA, revealing that intermolecular hydrogen bonding and pi-pi stacking are the main driving forces for the formation of ordered aggregates and the enhancement of luminescence of PRT-AuNCs. Inspired by the optical properties of the PRT-AuNCs/TA complex, a luminescent nanocomposite hydrogel with self-healing properties was successfully prepared, and a multicolor hydrogel was obtained by doping blue emission quantum dots (QDs). The different pH-responsive behaviors of QDs and PRT-AuNCs make the multicolor hydrogel a candidate for potential applications in information encryption.
The development of nanocluster (NC)-based luminescent functional materials has gained tremendous attention recently owing to their unique optical properties. Herein, we studied the coassembly behavior of AuNCs modified using 6-propyl-2-thiouracil (PRT-AuNCs) with trimesic acid (TA). Microrods were formed through the coassembly, accompanied with enhanced photoluminescence emission. The intermolecular hydrogen bonding and pi-pi stacking between TA and PRT ligands were verified to be the main driving forces for the formation of ordered aggregates and consequently the improvement of the luminescence of PRT-AuNCs. Furthermore, inspired by the outstanding optical properties of the PRT-AuNCs/TA complex, we prepared a luminescent nanocomposite hydrogel through loading the PRT-AuNCs/ TA complex into.-carrageenan networks. The obtained hydrogel showed strong luminescence, high strength, and self-healing properties. Moreover, by doping blue emission quantum dots (QDs), a type of multicolor hydrogel was obtained. The different pHresponsive behaviors of QDs and PRT-AuNCs render the multicolor hydrogel a candidate with potential applications in information encryption. This study proposes a new method for the development of AuNC-based nanomaterials through coassembly and provides a perspective for the potential usage of AuNCs as smart luminescent devices.
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