Naslov
Marine gel phase: network formation and interaction with nanoparticles

Autori
Pletikapić, Galja ; Svetličić, Vesna ; Mišić Radić, Tea ; Kellermayer, Miklos ; Brujić, Jasna.

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, ostalo

Skup
21. International Scientific Meeting on Vacuum Science and Techniques

Mjesto i datum
Samobor, Hrvatska, 08.05.2014. - 09.05.2014

Vrsta sudjelovanja
Pozvano predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
marine gel; polysaccharides; self-assembly; force spectroscopy; AFM

Sažetak
The gel formation in aqueous solutions such as seawater is a complex process that depends on biopolymer chemical structure, nature of co- and counter ions, polymer concentration and temperature. Microscopic (TEM, AFM) and NMR studies revealed that fibrillar acyl heteropolysaccharides are major constituents of naturally occurring marine high molecular weight dissolved organic matter. These polysaccharides stand out by their supramolecular organization and gelling capacity due to hydrogen bonding and electrostatic interactions and are directly related to their function in marine ecosystem. Here, we used force spectroscopy to quantify the intra- and intermolecular forces within the marine gel network. Even though marine biopolymers are complex naturally occurring materials, careful experimentation using high-resolution AFM imaging and force spectroscopy revealed reproducible and distinct mechanical responses. These mechanical signatures depend on the level of association between the fibrils and the topology of the gel network itself. To reveal the interaction of nanoparticles (NPs) in complex matrices like marine gel phase is a challenging task. By high- resolution AFM imaging, the incorporation of NPs into the marine gel matrix was identified. This nanospecific interaction could have significant environmental implications.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Geologija, Biologija

POVEZANOST RADA