Structural characterization of self-assembled highly organized hydrogels composed of a glycolipid-silver nanoparticles complex
We recently published (10.1039/ D2SM01218A; 10.1021/acssuschemeng.2c01860) the synthesis of metallogels from biobased glycolipids (GLs). SAXS, cryo-TEM and solid-state NMR had shown that GLs/Ag+ complex fibrillates to form a hydrogel at RT. A broad set of SAXS data shows a series peaks in a 1:2:3...ratio, suggesting a lamellar, raft-like, arrangement of the fibers. Unpublished high-resolution cryo-TEM experiments actually reveal that the core of the fibers is composed by monodisperse silver nanoparticles (NPs, d= 2.5 nm) co-aligned with the fiber's longest (infinite) axis. The presence of the NPs in the absence of reducing agents is puzzling as well as their structural role. Since, both SAXS and TEM could reduce silver during observation, SANS is required for two critical reasons: 1) neutrons won't reduce Ag+ during analysis; 2) difference in contrast between SANS with SAXS will help determining the relative contribution between GLs and silver (Ag+ or NPs). We'll learn if the 1:2:3... peaks in SAXS belong to the GLs or Ag NPs. We plan to study not more than 10 samples at [0.001 < q/Å^-1 < 0.7]: 2 controls + 8 time stamps, from mixing of GLs with Ag+ solution, t_0h, to t_24h.
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The recommended format for citing this dataset in a research publication is in the following format:
BACCILE Niki; OZKAYA Korin gasia and PORCAR Lionel. (2023). Structural characterization of self-assembled highly organized hydrogels composed of a glycolipid-silver nanoparticles complex. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.EASY-1216
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