Abstract
Control over the emergence of ferroelectric order remains a fundamental challenge for the rational design of artificial materials with novel properties. Here we report a new strategy for artificial design of layered perovskite ferroelectrics by using oxide nanosheets (high-k dielectric Ca<inf>2</inf>Nb<inf>3</inf>O<inf>10</inf> and insulating Ti<inf>0.87</inf>O<inf>2</inf>) as a building block. We approached the preparation of superlattice films by a layer-by-layer assembly involving Langmuir-Blodgett deposition. The artificially fabricated (Ti<inf>0.87</inf>O<inf>2</inf>/Ca<inf>2</inf>Nb<inf>3</inf>O<inf>10</inf>)<inf>2</inf>(Ti<inf>0.87</inf>O<inf>2</inf>) superlattices are structurally unique, which is not feasible to create in the bulk form. By such an artificial structuring, we found that (Ti<inf>0.87</inf>O<inf>2</inf>/Ca<inf>2</inf>Nb<inf>3</inf>O<inf>10</inf>)<inf>2</inf>(Ti<inf>0.87</inf>O<inf>2</inf>) superlattices possess a new form of interface coupling, which gives rise to ferroelectricity with a good fatigue-free characteristic. Considering the flexibility of self-assembled nanosheet interfaces, this technique provides a route to synthesize a new kind of layered ferroelectric oxides.
| Original language | English |
|---|---|
| Article number | 244001 |
| Journal | Nanotechnology |
| Volume | 26 |
| Issue number | 24 |
| DOIs | |
| Publication status | Published - 2015 Jun 19 |
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Keywords
- oxide nanosheets, nanoarchitectonics, artificial superlattice, layer-by-layer assembly ferroelectricity
ASJC Scopus subject areas
- Bioengineering
- Chemistry(all)
- Electrical and Electronic Engineering
- Mechanical Engineering
- Mechanics of Materials
- Materials Science(all)
Cite this
Artificial design for new ferroelectrics using nanosheet-architectonics concept. / Kim, Yoon Hyun; Dong, Lei; Osada, Minoru; Li, Bao Wen; Ebina, Yasuo; Sasaki, Takayoshi.
In: Nanotechnology, Vol. 26, No. 24, 244001, 19.06.2015.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Artificial design for new ferroelectrics using nanosheet-architectonics concept
AU - Kim, Yoon Hyun
AU - Dong, Lei
AU - Osada, Minoru
AU - Li, Bao Wen
AU - Ebina, Yasuo
AU - Sasaki, Takayoshi
PY - 2015/6/19
Y1 - 2015/6/19
N2 - Control over the emergence of ferroelectric order remains a fundamental challenge for the rational design of artificial materials with novel properties. Here we report a new strategy for artificial design of layered perovskite ferroelectrics by using oxide nanosheets (high-k dielectric Ca2Nb3O10 and insulating Ti0.87O2) as a building block. We approached the preparation of superlattice films by a layer-by-layer assembly involving Langmuir-Blodgett deposition. The artificially fabricated (Ti0.87O2/Ca2Nb3O10)2(Ti0.87O2) superlattices are structurally unique, which is not feasible to create in the bulk form. By such an artificial structuring, we found that (Ti0.87O2/Ca2Nb3O10)2(Ti0.87O2) superlattices possess a new form of interface coupling, which gives rise to ferroelectricity with a good fatigue-free characteristic. Considering the flexibility of self-assembled nanosheet interfaces, this technique provides a route to synthesize a new kind of layered ferroelectric oxides.
AB - Control over the emergence of ferroelectric order remains a fundamental challenge for the rational design of artificial materials with novel properties. Here we report a new strategy for artificial design of layered perovskite ferroelectrics by using oxide nanosheets (high-k dielectric Ca2Nb3O10 and insulating Ti0.87O2) as a building block. We approached the preparation of superlattice films by a layer-by-layer assembly involving Langmuir-Blodgett deposition. The artificially fabricated (Ti0.87O2/Ca2Nb3O10)2(Ti0.87O2) superlattices are structurally unique, which is not feasible to create in the bulk form. By such an artificial structuring, we found that (Ti0.87O2/Ca2Nb3O10)2(Ti0.87O2) superlattices possess a new form of interface coupling, which gives rise to ferroelectricity with a good fatigue-free characteristic. Considering the flexibility of self-assembled nanosheet interfaces, this technique provides a route to synthesize a new kind of layered ferroelectric oxides.
KW - oxide nanosheets, nanoarchitectonics, artificial superlattice, layer-by-layer assembly ferroelectricity
UR - http://www.scopus.com/inward/record.url?scp=84930503666&partnerID=8YFLogxK
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U2 - 10.1088/0957-4484/26/24/244001
DO - 10.1088/0957-4484/26/24/244001
M3 - Article
AN - SCOPUS:84930503666
VL - 26
JO - Nanotechnology
JF - Nanotechnology
SN - 0957-4484
IS - 24
M1 - 244001
ER -