Raman and Photoemission Spectroscopy Studies on Thermal Stability of Quantum Dot Consisting of Si Clad and Ge Core

Author(s):  
Yudi Darma
2001 ◽  
Vol 08 (01n02) ◽  
pp. 19-23 ◽  
Author(s):  
F. Q. XU ◽  
E. D. LU ◽  
H. B. PAN ◽  
C. K. XIE ◽  
P. S. XU ◽  
...  

Chemically sulfur passivation of GaAs(100) by thioacetamide ( CH 3 CSNH 2) has been studied using synchrotron radiation photoemission spectroscopy (SRPES), Auger electron spectroscopy (AES) and low energy electron diffraction (LEED). The measurement of SRPES and AES showed that the top layer of native oxides over GaAs(100) was removed and the sulfides of Ga and As were formed after the passivation process. The thermal stability and surface structure have also been studied by annealing the passivated samples at different temperatures. We found that the surface sulfides could be removed gradually; as a result, a clean, ordered and thus Fermi level unpinning surface was finally achieved. The surface restructures with GaAs(100)–S(2×1) and 4×1 LEED patterns were observed on annealing above 260°C and at 550°C respectively.


1997 ◽  
Vol 31 (1) ◽  
pp. 84-87 ◽  
Author(s):  
A. E. Zhukov ◽  
A. Yu. Egorov ◽  
A. R. Kovsh ◽  
V. M. Ustinov ◽  
M. V. Maksimov ◽  
...  

2014 ◽  
Vol 35 (9) ◽  
pp. 1051-1057
Author(s):  
陈肖慧 CHEN Xiao-hui ◽  
袁曦 YUAN Xi ◽  
华杰 HUA Jie ◽  
赵家龙 ZHAO Jia-long ◽  
李海波 LI Hai-bo

Langmuir ◽  
2012 ◽  
Vol 28 (38) ◽  
pp. 13624-13635 ◽  
Author(s):  
F. P. Cometto ◽  
E. M. Patrito ◽  
P. Paredes Olivera ◽  
G. Zampieri ◽  
H. Ascolani

2018 ◽  
Vol 18 (11) ◽  
pp. 7536-7541 ◽  
Author(s):  
Qing-Lu Liu ◽  
Chun-Cai Hou ◽  
Hong-Mei Chen ◽  
Ji-Qiang Ning ◽  
Qi-Zhu Li ◽  
...  

2014 ◽  
Vol 5 ◽  
pp. 323-328 ◽  
Author(s):  
Annalisa Paolone ◽  
Marco Angelucci ◽  
Stefania Panero ◽  
Maria Grazia Betti ◽  
Carlo Mariani

Background: The thermal stability of iron oxide nanowires, which were obtained with a hard template method and are promising elements of Li-ion based batteries, has been investigated by means of thermogravimetry, infrared and photoemission spectroscopy measurements. Results: The chemical state of the nanowires is typical of the Fe2O3 phase and the stoichiometry changes towards a Fe3O4 phase by annealing above 440 K. The shape and morphology of the nanowires is not modified by moderate thermal treatment, as imaged by scanning electron microscopy. Conclusion: This complementary spectroscopy–microscopy study allows to assess the temperature limits of these Fe2O3 nanowires during operation, malfunctioning or abuse in advanced Li-ion based batteries.


Sign in / Sign up

Export Citation Format

Share Document