Journal
PHYSICAL REVIEW LETTERS
Volume 115, Issue 11, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.115.118301
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Funding
- DFG [SFB 716, HO 1108/22-1]
- German Ministry of Science and Education (BMBF) [01IH08001]
- Volkswagen Foundation
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Dissolved ions can alter the local permittivity of water; nevertheless most theories and simulations ignore this fact. We present a novel algorithm for treating spatial and temporal variations in the permittivity and use it to measure the equivalent conductivity of a salt-free polyelectrolyte solution. Our new approach quantitatively reproduces experimental results unlike simulations with a constant permittivity that even qualitatively fail to describe the data. We can relate this success to a change in the ion distribution close to the polymer due to the buildup of a permittivity gradient.
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