棒状多电解质的非单质电泳性流动性是由添加盐中的多价值聚合物引起的
Hossein Vahid1,2,3, Alberto Scacchi1,2,3, Maria Sammalkorpi2,3,4
1Department of Applied Physics, Aalto University, P.O. Box 11000, 00076 Aalto, Finland.
Physical review. E
|February 17, 2024
概括
在多电解质溶液中添加多价电离子可以逆转电泳性移动性 (EM). 增加电离子价值抑制了对电离子的EM逆转,但可以在高盐度下诱导它,即使是电荷较弱的聚合物.
科学领域:
- 物理化学 物理化学
- 聚合物科学 聚合物科学
- 计算生物物理学的计算生物物理学
背景情况:
- 多价子对应物诱导充电聚电解质 (PE) 中的电荷逆转和电泳运动 (EM) 逆转.
- 对这些现象的可离子价值的影响仍然不太清楚,特别是对于像DNA这样的刚性PE.
研究的目的:
- 为了研究值对刚性多电解质 (PE) 的电泳运动 (EM) 逆转的影响.
- 阐明PE电荷逆转和EM逆转背后的机制,受和反两种值的影响.
主要方法:
- 粗粒度分子动力学模拟被用于模拟多电解质溶液.
- 系统地对和的价值和盐度进行了变化.
主要成果:
- 增加子价值抑制了由多价值子诱导的EM逆转.
- 多价子在低盐度下增强EM (单价子),在高盐度下诱导EM逆转.
- 多价值电偶诱导的EM逆转即使在低PE电荷密度下也会发生,这种情况仅仅是多价值电偶是无效的.
结论:
- 离子价值在调节多电解质电泳性移动性和电荷逆转方面发挥着至关重要的作用.
- 这些发现为通过战略盐选择控制多电解质相互作用和自我组装提供了洞察力.
- 这项研究强调了通过操纵coion和 counterion等值来调整PE行为的潜力.
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