...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical >'On—Off' Switchable Bioelectrocatalysis Synergistically Controlled by Temperature and Sodium Sulfate Concentration Based on Poly(N-isopropylacrylamide) Films
【24h】

'On—Off' Switchable Bioelectrocatalysis Synergistically Controlled by Temperature and Sodium Sulfate Concentration Based on Poly(N-isopropylacrylamide) Films

机译：基于聚（N-异丙基丙烯酰胺）薄膜的温度和硫酸钠浓度协同控制的“开-关”可切换生物电催化

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

摘要

In this work, pory(AMsopropylacrylamide) (PNIPAm) films were synthesized on a Au electrode surface through the electrochemically induced free-radical polymerization method. The "coil-to-globule" phase transition of PNIPAm films was sensitive to both environmental temperature and sodium sulfate (Na2SO4) concentration in solution and was detected by cyclic voltammetry (CV) of ferrocenecarboxylic acid (Fc(COOH)) probe. For example, in solutions containing no Na2SO4 at 25 °C, the probe demonstrated a well-defined CV peak pair with large peak currents, showing the "on" state; at 35 °C, the CV response was significantly suppressed, showing the "off state. By switching the film electrodes in solution between 25 and 35 °C, the CV peak currents cycled between the on and off states, demonstrating the reversible thermosensitive switching function of the films. Similarly, the reversible Na2SO4—concentration-sensitive "on—off' property of PNIPAm films toward Fc(COOH) was also observed. In particular, the influence of temperature and Na2SO4 concentration on the on-off behavior of the films was not independent or separate, but synergetic or cooperative. The dual-responsive property of the films could also be used to switch the on-off bioelectrocatalysis. That is, the electrochemical oxidation of glucose catalyzed by glucose oxidase (GOx) and mediated by Fc(COOH) in solution could be controlled or modulated by changing the surrounding temperature, Na2SO4 concentration, or both. This dual- and synergetic-triggered bioelectrocatalysis based on the "smart" PNIPAm interface system may establish a foundation for fabricating novel multiple factor-controllable biosensors.
机译：在这项工作中，通过电化学诱导的自由基聚合方法在Au电极表面合成了pory（AMsopropylpropylacrylamide）（PNIPAm）膜。 PNIPAm膜的“线圈到球”相变对环境温度和溶液中的硫酸钠（Na2SO4）浓度均敏感，并通过二茂铁羧酸（Fc（COOH））探针的循环伏安法（CV）进行检测。例如，在25°C不含Na2SO4的溶液中，探针显示出一个清晰的CV峰对，具有大的峰值电流，显示为“导通”状态。在35°C时，CV响应被显着抑制，显示为“关闭”状态。通过在25至35°C之间切换溶液中的薄膜电极，CV峰值电流在打开和关闭状态之间循环，证明了可逆热敏开关功能类似地，还观察到了PNIPAm膜对Fc（COOH）具有可逆的Na 2 SO 4-浓度敏感的“开-关”特性。特别地，温度和Na 2 SO 4浓度对薄膜的开-关行为的影响不是独立或分开的，而是协同或协同的。薄膜的双重响应特性也可用于切换开-关生物电催化。即，可以通过改变周围温度，Na 2 SO 4浓度或两者来控制或调节由葡萄糖氧化酶（GOx）催化并由溶液中的Fc（COOH）介导的葡萄糖的电化学氧化。这种基于“智能” PNIPAm接口系统的双触发和协同触发的生物电催化可以为制造新型的多因子可控的生物传感器奠定基础。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
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