Polymer/perovskite - Type nanoparticle multilayers with multi electric properties prepared from ligand addition-induced layer - By - layer assembly

Younghoon Kim, Kyungyun Kook, Sun Kak Hwang, Cheolmin Park, Jinhan Cho

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

We introduce an adsorption mechanism for a layer-by-layer (LbL) assembly (i.e., a ligand addition-induced LbL assembly) and demonstrate that the (polymer/perovskite nanoparticle (NP))n nanocomposite films based on the ligand addition LbL exhibit ferroelectric and resistive switching properties. Oleic acid (OA)-stabilized BaTiO3 NPs (OA-BTO NPs) with a size of approximately 8 nm were LbL-assembled with amine-functionalized dendrimers (NH2-dendrimers) using the high affinity between NH 2 moieties and Ti ions. The ferroelectric properties of the (NH 2-dendrimer/OA-BTO NP)n multilayers were generated by the Ti disorder in the OA-BTO NP unit cell despite the use of sub-10 nm OA-BTO NPs (i.e., OA-BTO NPs), which are near the critical size for ferroelectric properties. Additionally, the (NH2-dendrimer/OA-BTO NP)n multilayers sandwiched between the bottom (platinum) and top (silver or tungsten) electrodes exhibited a resistive switching memory at a relatively low operating voltage below 2 V with a switching speed of approximately 100 ns and an ON/OFF current ratio of approximately 104. Furthermore, the ferroelectric and resistive switching properties could be further improved by controlling the bilayer number (n). We believe that our approach can provide a basis for designing and exploiting multifunctional memory electronics based on a variety of perovskite NPs with ferroelectric properties.

Original languageEnglish
Pages (from-to)2419-2430
Number of pages12
JournalACS Nano
Volume8
Issue number3
DOIs
Publication statusPublished - 2014 Mar 25

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Polymer/perovskite - Type nanoparticle multilayers with multi electric properties prepared from ligand addition-induced layer - By - layer assembly'. Together they form a unique fingerprint.

  • Cite this