Direct Evidence of Surface Charges in n-Type Al-Doped ZnO
Direct Evidence of Surface Charges in n-Type Al-Doped ZnO
复制标题
n 型掺铝 ZnO 中表面电荷的直接证据
DOI:
10.1021/acs.jpcc.8b04718
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发表时间:
2018
期刊:
影响因子:
--
通讯作者:
Kittilstved, Kevin R.
中科院分区:
文献类型:
--
作者:
Zhou, Dongming;Wang, Peijian;Roy, Christopher R.;Barnes, Michael D.;Kittilstved, Kevin R.
The fundamental properties of electrons in the prototypical n-type oxide nanocrystal, Al3+-doped ZnO, have been studied at both the ensemble and single-particle levels by spectroscopic and electron force microscopic techniques. We developed and implemented a new synthetic methodology that enables the tunable incorporation of Al3+in the ZnO nanocrystal in an “etching–regrowth–doping” (ERD) strategy in a single-pot reaction. The ensemble-averaged properties and evolution of the Al3+speciation in ZnO were studied using electronic absorption spectroscopy and powder X-ray diffraction and reveal the successful substitution of Al3+only after implementation of the ERD strategy. Characterization of individual ZnO, surface Al3+-doped ZnO, and internal Al3+-doped ZnO nanocrystals using electrostatic force microscopy reveals strong responses in both the quantity of surface charges and electron polarizabilities, which are dependent on the amount of Al3+in the ZnO lattice. These results appear to suggest that an upper limit to the electron polarizability exists for Al3+-doped ZnO nanocrystals.
DOI:
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发表时间:
2000
期刊:
影响因子:
--
作者:
T. Krauss;L. Brus
通讯作者:
L. Brus
影响因子:
15
作者:
Hofman, Elan;Robinson, Richard John;Zheng, Weiwei
通讯作者:
Zheng, Weiwei
DOI:
10.1021/acs.jpclett.5b01360
发表时间:
2015
期刊:
The journal of physical chemistry letters
影响因子:
--
作者:
Phillip A. Cox;Micah S. Glaz;Jeffrey S. Harrison;Samuel R. Peurifoy;D. Coffey;D. Ginger
通讯作者:
D. Ginger