• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Nanotechnology >Influence of laser and alkali treatment on an Ag/TiO2 nanotube based dopamine sensor
【24h】

Influence of laser and alkali treatment on an Ag/TiO2 nanotube based dopamine sensor

机译：Influence of laser and alkali treatment on an Ag/TiO2 nanotube based dopamine sensor

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相关主题

摘要

Herein, TiO2 nanotubes (T-NTs) arrays were subjected to two types of treatment followed by a simple metal deposition technique to significantly enhance the performances of T-NTs based electrochemical sensing of dopamine. The first type of treatment was done by soaking T-NTs in sodium hydroxide solution for an optimal time to enhance the conductivity and charge carrier density. The second type of treatment employed was laser irradiation, which induces crystallinity disorder and forms rutile TiO2, promoting active analyte adsorption sites. Afterward, silver (Ag) was electro-deposited on the T-NTs as a dopamine sensing catalyst to form T-NTs/Ag nanohybrids. The dual-treated T-NTs based sensor showed 3-fold enhancement in sensitivity (from 8.2 mu A mM(-1) cm(-2) to 32 mu A mM(-1) cm(-2)), reduced charge transfer resistance (from 38 x 10(-6) omega to 0.7 x 10(-6) omega), above 2 order higher donor charge density (from 3.58 x 10(18) cm(-3) to 1.41 x 10(21) cm(-3)), and reduced limit of detection (from 32.3 mu M to 2.8 mu M) in comparison to plain T-NTs based sensor. In addition, the sensitivity reported here is significantly higher than most of the previously reported TiO2 based dopamine sensors. Perspective-wise, the dual treatment approach is a promising technique and is highly desirable for enhancing the performances of T-NTs and other nanomaterial based electrochemical sensors.

著录项

获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号