... between the interface of ZnO and HfO
2
could
be responsible for the enhancement of PL property in the
blue and green regions. These ZnO/HfO
2
:Eu core–shell
nanostructures have many potential applications ... spectra of ZnO nanofibers, HfO
2
:Eu
nanotubes, and ZnO/HfO
2
:Eu nanocables annealed at 600
and 700°C, respectively. It can be seen that the emission
bands of the ZnO/H...
... show E
to
of
0.45, 0.35, and 0.27 V/lm, respectively; and E
th
of 0.60,
0.55, and 0.49 V/lm, respectively. This result illustrated
that thinner sidewalls are favorable to the improvement of
field-emission ... concentration
of 20 mg/ml, and fed into CVD furnace by a syringe pump
at a constant rate of 0.4 ml/min for 30 min. A mixture of
Ar and H
2
was flowing through the sys...
... at
400-800 nm, assigned to the band adsorption of CdSe.
And the absorption of CNT-CdSe composite is higher
than that of CdSe compound in both of UV light and
visible-light region, as the MWCNTs ... electrons and holes in the
conduction band (CB) and valence band of CdSe. Then
the electrons accepted by MWCNTs from light can
transfer into the CB of CdSe, thereby increasing...
... almost parallel fashion and two groups of
366 Nanoscale Res Lett (2008) 3:365–371
123
NANO EXPRESS
Synthesis and Visible-Light Photocatalytic Property of Bi
2
WO
6
Hierarchical Octahedron-Like Structures
Yuanyuan ... eV
(inset of Fig. 5), which is suitable for photocatalytic
decomposition of organic contaminants under visible-light
irradiation.
Next, we study the ph...
... measurements and data
analysis, and drafted the manuscript. DG and DX made the conception and
design of the manuscript. ZZ2 carried out the XPS measurements and data
analysis. JLZ and ZZ1 participated ... there is not any con-
tamination of ferromagnetic cluster formation and the
observed FM is the instinct property of Zn
1-x
Zr
x
ONPs,
the zero-field-cooled (ZF C) and...
... LTD 42, Changwon, 642-716, Republic of Korea
3
Department of Chemistry and Institute of Basic Science, Sungkyunkwan University,
Suwon, 440-746, Republic of Korea
4
Quantum Optics Lab, Korea ... networks, and thus, they were not well stretched (Figure 3f). It
was reported that the surface tension and the density of amine groups on the surface
determined the degree of s...
... basis of a
trigonal structure of space group
¯
R3m
with monoclinic C2/m phase as expected. The morphologies and
electrochemical properties of the samples obtained were compared as the value of x and ... results and wrote the paper. JS,
HP, JWK, and KK participated in the characterization of samples and carried
out experiments. VM contributed to the technical discussions. A...
... maximum of BeO is of lower
energy than that of ZnO, while the conduction band
minimum of BeO is of higher energy than that of ZnO
[32]. In such case, a potential well for both electron and
hole ... nature of BeO shell, which is composed
of many island-shape grains with random orientations
to the ZnO core. Accordingly, a rather rough edge of
the BeO shell is observed. Magni...
... solubility
of l-aspartic acid and glycine in chloroform. Only about
25% of the stearic acid chains could be exchanged by
Boc-glycine (Boc-Gly). But ligand exchange with the
bidentate ligands mercaptosuccinic ... 1,220 and 1,
066 cm
-1
.
Procedure for surface modification of nanoparticles
A solution of carboxylic acid (150 mg) in 5 mL chloroform
was added to a reaction vesse l cont...
... derivative of both
curves of the hysteresis loops (heating and cooling) and
considering the mean value.
Results and discussion
Structural characterization
The crystal structure of the three sets of films ... toward
the conduction band. Since intrinsic VO
2
thin film is of
n-type, introduction of ion donors c ause an inevitable
degradation of the transmittance (and resisti...