在pH响应的双连续纳米圈中非线性过渡性
Wouter P van den Akker1,2, Hanglong Wu1, Pascal L W Welzen1
1Department of Chemistry & Chemical Engineering, Institute for Complex Molecular Systems, Bio-Organic Chemistry, Eindhoven University of Technology, Helix, P.O. Box 513, 5600MB Eindhoven, The Netherlands.
Journal of the American Chemical Society
|March 30, 2023
概括
研究人员制造出适应pH的纳米球来控制酶活动. 这些纳米结构表现出独特的透性变化,使纳米反应器内的催化过程能够精确调节.
科学领域:
- 生物材料科学
- 纳米技术
- 化学工程
背景情况:
- 两块共聚物用于创建纳米结构.
- 响应pH的材料具有可调节的特性,可控制释放和催化.
- 纳米反应器中的酶封装是生物催化剂的关键策略.
研究的目的:
- 构建具有可调节的透性和催化活性的响应pH的双连续纳米圈 (BCN).
- 调查酶载BCN的非线性过渡透性和催化输出.
- 为了比较BCN与球形聚合体的性能,以控制催化.
主要方法:
- 具有pH响应组的两块共聚物的组合.
- 尿酶和胡卜过氧化酶 (HRP) 的联合封装.
- 使用尿酶介导的pH增加 (尿素到氨) 来触发透性变化.
- 监测HRP的催化活性,以应对尿素添加和不同的缓冲容量.
主要成果:
- BCN 显示非线性过渡透性和催化活性.
- 尿酶活动诱导了pH值的增加,导致了暂时的HRP催化输出.
- 氨的产生导致膜透率下降,导致非线性水效应.
- 用尿素度和缓冲容量调节了催化输出.
- 这种非线性抑制是BCN形态的特征,并未在聚合体中观察到.
结论:
- 通过纳米反应器的pH变化,BCN形态使催化过程能够得到最佳控制.
- 与散装条件相比,BCN的独特透性可以进行精确的微环境控制.
- 这些响应pH的BCN为先进的纳米反应器应用提供了一个新平台.
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