Ultrafast chemical dynamic behavior in highly epitaxial LaBaCo2O5+delta thin films
文献类型：期刊论文
| 作者 | Wang, HB ; Bao, SY ; Liu, J ; Collins, G ; Ma, CR ; Liu, M ; Chen, CL ; Dong, C ; Whangbo, MH ; Guo, HM ; Gao, HJ |
| 刊名 | JOURNAL OF MATERIALS CHEMISTRY C
 |
| 出版日期 | 2014 |
| 卷号 | 2期号:28页码:5660 |
| ISSN号 | 2050-7526 |
| 通讯作者 | Chen, CL (reprint author), Univ Texas San Antonio, Dept Phys & Astron, San Antonio, TX 78249 USA. |
| 中文摘要 | The redox reactions of highly epitaxial LaBaCo2O5+delta (LBCO) thin films exposed to the switching flow of reducing (H-2) and oxidizing (O-2) gases were examined at various temperatures between 260 and 700 degrees C. Their electrical resistance was measured using a precise ac bridge measurement system. The as-grown LBCO films have very good electrical conductivity at low and medium temperatures between 400 and 700 degrees C, and are extremely sensitive to reducing and oxidizing environments with superfast redox dynamics. The LBCO thin films show more complex redox reactions at low temperatures (300-350 degrees C), suggesting the occurrence of conducting-to-insulating-to-conducting transitions during the redox reactions. In particular, the insulating-to-conducting transition under an oxidation process is superfast, with the largest resistance change of up to 3 x 10(7) Omega s(-1), occurring even at a low temperature of 300 degrees C. The extremely short response time, the giant resistance change, and the excellent chemical stability in a broad temperature range from 260 to 700 degrees C suggests that the highly epitaxial LBCO thin-films can be excellent candidates for low-temperature solid oxide fuel cells, chemical sensors, and catalyst applications. |
| 资助信息 | Department of Energy [DE-FE0003780]; National Science Foundation [NSF-NIRT-0709293, NSF-PREM DMR-0934218]; "China Scholarship Council" for the program of national study-abroad project for the postgraduates of high level universities at UTSA |
| 语种 | 英语 |
| 公开日期 | 2015-04-14 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/59221]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Wang, HB,Bao, SY,Liu, J,et al. Ultrafast chemical dynamic behavior in highly epitaxial LaBaCo2O5+delta thin films[J]. JOURNAL OF MATERIALS CHEMISTRY C,2014,2(28):5660. |
| APA | Wang, HB.,Bao, SY.,Liu, J.,Collins, G.,Ma, CR.,...&Gao, HJ.(2014).Ultrafast chemical dynamic behavior in highly epitaxial LaBaCo2O5+delta thin films.JOURNAL OF MATERIALS CHEMISTRY C,2(28),5660. |
| MLA | Wang, HB,et al."Ultrafast chemical dynamic behavior in highly epitaxial LaBaCo2O5+delta thin films".JOURNAL OF MATERIALS CHEMISTRY C 2.28(2014):5660. |
入库方式： OAI收割
来源：物理研究所
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