(532e) Real-Time Investigation of Nanoparticle Self-Assembly Mechanisms and Its Controlling Factors
AIChE Annual Meeting
Wednesday, November 18, 2020 - 9:00am to 9:15am
To gain insights into the self-assembly process, we conducted in situ liquid cell TEM (LCTEM) experiments (Fig.1 and 2) and monitored the silver or gold NP assembly process in real time to reveal the kinetics and the driving sources of assembly process under various experimental conditions, such as solvents and ligands.
To understand kinetic details of the process, the self-assembly of gold NPs are further analyzed by calculating the contributions of various forces involved [3-4]. Our results show that these forces, including FBr, FvdW, Fel, and FD, and their interplay play a key role in NP self-assembly process. The superlattice structure can be controlled via solvents or ligands.
These results provide insights into the complex competition between forces at different scales. The obtained knowledge of interactions between surface coating materials can be extended to a wide range of ligands with different chain lengths, functionalized groups, or biodegradable polymers that can be applied to the fields of material synthesis, bio-mineralization, bio-sensors, or electronic devices.
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