Due to near field coupling (NFC) effect, the non-closed-packed nanoparticles (NPs) assemblies with tunable interparticle distance demonstrated great potential and attracted vast attentions. Yet, fabrication of non-closed-packed 2D NPs material with large area remains a challenge, limiting its applications in microelectronic, photoelectronic devices and functional sensors. Here, we will demonstrate a facile yet robust “extremely rapid liquid-liquid interface assembly” strategy to generate non-closed-packed Au NPs superlattice monolayer (SM) with centimeter scale, and revealed mechanism for the interfacial self-assembly of the polymer-grafted NPs. The interparticle distance could be tailored by adjusting molecular weight of the tethered polymer, triggering corresponding variations in surface plasmon resonance spectrum. Moreover, pentacene-based organic nano-floating-gate memory (NFGM) device was fabricated based on the as-prepared SM, which demonstrated significantly improved performances compared to the traditional devices with AuNPs amorphous monolayer. Our work provides a new opportunity to obtain centimeter-scaled 2D NPs materials with non-closed-packed structure, which is great meaningful to the practical applications.

Assembly of polymer-grafted gold nanoparticles into superlattice for memory devices

2019 Spring National Meeting

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