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

20 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

Fingerprint

Oleic acid
Oleic Acid
Perovskite
oleic acid
Dendrimers
Polymers
Multilayers
Electric properties
assembly
Ferroelectric materials
Ligands
Nanoparticles
nanoparticles
ligands
dendrimers
polymers
Data storage equipment
Tungsten
Nanocomposite films
Platinum

Keywords

  • ferroelectric
  • layer-by-layer assembly
  • multilayers
  • nonvolatile memory

ASJC Scopus subject areas

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

Cite this

Polymer/perovskite - Type nanoparticle multilayers with multi electric properties prepared from ligand addition-induced layer - By - layer assembly. / Kim, Younghoon; Kook, Kyungyun; Hwang, Sun Kak; Park, Cheolmin; Cho, Jinhan.

In: ACS Nano, Vol. 8, No. 3, 25.03.2014, p. 2419-2430.

Research output: Contribution to journalArticle

Kim, Younghoon ; Kook, Kyungyun ; Hwang, Sun Kak ; Park, Cheolmin ; Cho, Jinhan. / Polymer/perovskite - Type nanoparticle multilayers with multi electric properties prepared from ligand addition-induced layer - By - layer assembly. In: ACS Nano. 2014 ; Vol. 8, No. 3. pp. 2419-2430.
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