One-dimensional（ID） In2O3（ZnO）m superlattice nanobelts are synthesized by a chemical vapor deposition method.The formation of the In2O3（ZnO）m superlattice is verified by the high-resolution transmission electron...One-dimensional（ID） In2O3（ZnO）m superlattice nanobelts are synthesized by a chemical vapor deposition method.The formation of the In2O3（ZnO）m superlattice is verified by the high-resolution transmission electron microscopy images.The typical zigzag boundaries could be clearly observed.An additional peak at 614 cm^-1 is found in the Raman spectrum,which may correspond to the superlattice structure.The study about the electrical transport properties reveals that the In2O3（ZnO）m nanobelts exhibit peculiar nonlinear I-V characteristics even under the Ohmic contact measurement condition,which are different from the Ohmic behaviors of the In-doped ZnO nanobelts.The photoelectrical measurements show the differences in the photocurrent property between them,and their transport mechanisms are also discussed.展开更多
The nanocomposites of ZnO-SnO_2 and In_2O_3-SnO_2 were prepared by wet chemical co-precipitation method as a novel semiconductor gas sensing materials for the detection of environmentally toxic gases.Controlled prepar...The nanocomposites of ZnO-SnO_2 and In_2O_3-SnO_2 were prepared by wet chemical co-precipitation method as a novel semiconductor gas sensing materials for the detection of environmentally toxic gases.Controlled preparation parameters were critical towards the grain size and crystallinity of the obtained nanocomposites.The results showed that these nanocomposites exhibited high sensitivity and selectivity for the detection of CO and NO_x,and the sensitivity depended on the composition of the composite,calcination temperature and operating temperature.The gas sensing properties of the sensors were further improved through incorporation of dopants and surface additives.The gas sensing mechanism was also discussed by X-ray photoelectron spectroscopic (XPS) and temperature-programmed desorption (TPD) studies.展开更多
基金supported by the National Natural Science Foundation of China(Grant No.51172058)the Key Project of the Science Technology and Research Project of Education Bureau,Heilongjiang Province,China(Grant No.12521z012)the Natural Science Foundation of Heilongjiang Province for Returned Chinese Scholars,China(Grant No.LC2013C17)
文摘One-dimensional（ID） In2O3（ZnO）m superlattice nanobelts are synthesized by a chemical vapor deposition method.The formation of the In2O3（ZnO）m superlattice is verified by the high-resolution transmission electron microscopy images.The typical zigzag boundaries could be clearly observed.An additional peak at 614 cm^-1 is found in the Raman spectrum,which may correspond to the superlattice structure.The study about the electrical transport properties reveals that the In2O3（ZnO）m nanobelts exhibit peculiar nonlinear I-V characteristics even under the Ohmic contact measurement condition,which are different from the Ohmic behaviors of the In-doped ZnO nanobelts.The photoelectrical measurements show the differences in the photocurrent property between them,and their transport mechanisms are also discussed.
基金This research was supported by the National Natural Science Foundation of China （No. 20577001）；Beijing Natural Science Foundation （No. 8042016 and 8062011）.
文摘The nanocomposites of ZnO-SnO_2 and In_2O_3-SnO_2 were prepared by wet chemical co-precipitation method as a novel semiconductor gas sensing materials for the detection of environmentally toxic gases.Controlled preparation parameters were critical towards the grain size and crystallinity of the obtained nanocomposites.The results showed that these nanocomposites exhibited high sensitivity and selectivity for the detection of CO and NO_x,and the sensitivity depended on the composition of the composite,calcination temperature and operating temperature.The gas sensing properties of the sensors were further improved through incorporation of dopants and surface additives.The gas sensing mechanism was also discussed by X-ray photoelectron spectroscopic (XPS) and temperature-programmed desorption (TPD) studies.
