Abstract
Monolayered nanodots of titanium, tungsten, and manganese oxides were obtained by exfoliation of the nanocrystals through aqueous solution processes at room temperature. The precursor nanocrystals of the layered compounds, such as sodium titanate (Na0.80Ti1.80□0.2O 4·xH2O, □: vacancy (x < 1.17)), cesium tungstate (Cs4W11O35·yH2O (y < 10.5)), and sodium manganate (Na0.44MnO2· zH2O (z < 0.85)), were synthesized in an aqueous solution. These nanocrystals of the layered compounds were delaminated into the monolayered nanodots through introduction of a bulky organic cation in the interlayer space. The resultant monolayered nanodots of the titanate and tungstate 2-5 nm in lateral size showed a remarkable blueshift of the bandgap energies. The calculation studies supported the blueshifts of the bandgap energies. The results suggest that syntheses of monolayered nanodots can expand the tuning range of the properties based on size effect. The present approaches for generation of ultrathin tiny objects can be applied to a variety of nanomaterials.
| Original language | English |
|---|---|
| Pages (from-to) | 4501-4508 |
| Number of pages | 8 |
| Journal | Journal of the American Chemical Society |
| Volume | 135 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - 2013 Mar 20 |
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ASJC Scopus subject areas
- Chemistry(all)
- Catalysis
- Biochemistry
- Colloid and Surface Chemistry
Cite this
Monolayered nanodots of transition metal oxides. / Nakamura, Keisuke; Oaki, Yuya; Imai, Hiroaki.
In: Journal of the American Chemical Society, Vol. 135, No. 11, 20.03.2013, p. 4501-4508.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Monolayered nanodots of transition metal oxides
AU - Nakamura, Keisuke
AU - Oaki, Yuya
AU - Imai, Hiroaki
PY - 2013/3/20
Y1 - 2013/3/20
N2 - Monolayered nanodots of titanium, tungsten, and manganese oxides were obtained by exfoliation of the nanocrystals through aqueous solution processes at room temperature. The precursor nanocrystals of the layered compounds, such as sodium titanate (Na0.80Ti1.80□0.2O 4·xH2O, □: vacancy (x < 1.17)), cesium tungstate (Cs4W11O35·yH2O (y < 10.5)), and sodium manganate (Na0.44MnO2· zH2O (z < 0.85)), were synthesized in an aqueous solution. These nanocrystals of the layered compounds were delaminated into the monolayered nanodots through introduction of a bulky organic cation in the interlayer space. The resultant monolayered nanodots of the titanate and tungstate 2-5 nm in lateral size showed a remarkable blueshift of the bandgap energies. The calculation studies supported the blueshifts of the bandgap energies. The results suggest that syntheses of monolayered nanodots can expand the tuning range of the properties based on size effect. The present approaches for generation of ultrathin tiny objects can be applied to a variety of nanomaterials.
AB - Monolayered nanodots of titanium, tungsten, and manganese oxides were obtained by exfoliation of the nanocrystals through aqueous solution processes at room temperature. The precursor nanocrystals of the layered compounds, such as sodium titanate (Na0.80Ti1.80□0.2O 4·xH2O, □: vacancy (x < 1.17)), cesium tungstate (Cs4W11O35·yH2O (y < 10.5)), and sodium manganate (Na0.44MnO2· zH2O (z < 0.85)), were synthesized in an aqueous solution. These nanocrystals of the layered compounds were delaminated into the monolayered nanodots through introduction of a bulky organic cation in the interlayer space. The resultant monolayered nanodots of the titanate and tungstate 2-5 nm in lateral size showed a remarkable blueshift of the bandgap energies. The calculation studies supported the blueshifts of the bandgap energies. The results suggest that syntheses of monolayered nanodots can expand the tuning range of the properties based on size effect. The present approaches for generation of ultrathin tiny objects can be applied to a variety of nanomaterials.
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UR - http://www.scopus.com/inward/citedby.url?scp=84875451348&partnerID=8YFLogxK
U2 - 10.1021/ja400443a
DO - 10.1021/ja400443a
M3 - Article
C2 - 23441590
AN - SCOPUS:84875451348
VL - 135
SP - 4501
EP - 4508
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
SN - 0002-7863
IS - 11
ER -