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- Title
MoO<sub>3</sub> 纳米线有序阵列在微流芯片中的 Cd<sup>2+</sup> 离子传感特性研究.
- Authors
李小康; 黄 锐; 余 念; 张翔晖; 王 钊
- Abstract
In this work, MoO3 nanowires are synthesized by hydrothermal method. The nanowires are assembled into nanowire arrays on microelectrodes through the dielectrophoresis (DEP) process. The sensing performance of the nanowire array to Cd2+ ions in water were investigated. The results show that the MoO3 nanowires obtained by hydrothermal method have orthorhombic structures and length up to 20 microns. Under the DEP force, the nanowires can be orderly arranged in the gap between the microelectrodes, forming the nanowire arrays with lateral and parallel orientations. The microsensors were fabricated by integrating the nanowire array with the microfluidic chips. At room temperature, the sensors exhibited fast and sensitive linear response to Cd2+ ions in water with the concentration of 1 - 50 μmol / L. For the Cd2+ concentration of 50 μmol / L, the resistance on / off ratio is ~4. 8 with response time of 114 s. The on / off ratio of the sensors gradually and linearly decreased when the Cd2+ concentration was decreased, and the response time was also decreased. According to the FTIR results, the fast and sensitive Cd2+ ion sensing by the MoO3 nanowire arrays should be attributed to the surface -OH group on the nanowires after the hydrothermal reaction.
- Publication
Electronic Components & Materials, 2019, Vol 38, Issue 5, p32
- ISSN
1001-2028
- Publication type
Article
- DOI
10.14106/j.cnki.1001-2028.2019.05.007