Electrochemical metamaterials

Kornyshev, Alexei A.

doi:10.1007/s10008-020-04762-4

Cited by 3 publications

(4 citation statements)

References 88 publications

(99 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, phase separation can be turned off/on. We think studying such properties is of high importance as they have possible applications in the uprising interdisciplinary fields such as metamaterials, and so forth. − …”

Section: Discussionmentioning

confidence: 99%

New Variant of Electrochemical Intercalation Isotherm: Analysis of Instability Region Dependence on Electrolyte Concentration

et al. 2022

View full text Add to dashboard Cite

Electroactive redox materials, encompassing redox polymers, metal−organic frameworks, and intercalation materials, play an important role in a wide range of emerging applications. However, many theoretical issues concerning quantitative thermodynamic description of such materials remain unclear so far. Existing variants of electrochemical intercalation isotherms (namely, the Langmuir−Frumkin isotherm, which often applies to redox polymers and electroactive solid materials, and the reformulated isotherm, accounting for the phase character of the potential distribution within the material) do not explain the dependence of redox materials' voltammetric responses on the electrolyte concentration. In addition to that, studies show that the reformulated isotherm has a higher value of the so-called shortrange interaction parameter at which phase separation starts and asymmetric single-phase regions in comparison to the Langmuir− Frumkin isotherm. A simple modification, accounting for the possibility of both positive and negative ions of the electrolyte solution to intercalate the electroactive redox material, leads to a new variant of electrochemical intercalation isotherm, which includes Langmuir−Frumkin and reformulated isotherms as limiting cases. The new model explains the dependence of redox materials' voltammetric responses on the electrolyte concentration. Theory predicts the dependence of short-range interaction parameters at which phase separation starts on the electrolyte composition. Thus, the new electrochemical intercalation isotherm shows the dependence of its unstable, metastable, and stable regions on the electrolyte concentration and ion distribution coefficients. It opens up a possibility to tune material characteristics such as sizes of single-phase/two-phase regions. In some particular cases, it is possible to induce or eliminate the phase transition by changing the concentration of the electrolyte. We believe that studying such properties may help in future realization of new smart materials with superior characteristics for electrochemical energy storage, use in chemical sensors, medical applications, and so forth.

show abstract

Section: Discussionmentioning

confidence: 99%

New Variant of Electrochemical Intercalation Isotherm: Analysis of Instability Region Dependence on Electrolyte Concentration

et al. 2022

View full text Add to dashboard Cite

show abstract

“…[1][2][3][4][5][6] The key idea here was to stimulate spontaneous assembly of charged NPs into two dimensional arrays, located at electrochemical interfaces and control the resulting array density by applied voltage, fine tuning this by solution pH and electrolyte concentration. 1,2,6 The balance between NP-interface attraction There was recently a great interest in creation of tuneable, reconfigurable nanophotonic structures. Whereas the chemistry of ordinary materials operates with atoms and molecules as building blocks, novel photonic metamaterials are designed using subwavelength scale building blocks, enabling enhanced/exotic optical effects.…”

Section: Introductionmentioning

confidence: 99%

“…1,2 More specifically, the reliability and reproducibility of the optical signals (especially reflectance and transmittance) has withstood both theoretical and experimental scrutiny. [1][2][3][4][5][6] The key idea here was to stimulate spontaneous assembly of charged NPs into two dimensional arrays, located at electrochemical interfaces and control the resulting array density by applied voltage, fine tuning this by solution pH and electrolyte concentration. 1,2,6 The balance between NP-interface attraction There was recently a great interest in creation of tuneable, reconfigurable nanophotonic structures.…”

Section: Introductionmentioning

confidence: 99%

“…1–6 The key idea here was to stimulate spontaneous assembly of charged NPs into two dimensional arrays, located at electrochemical interfaces and control the resulting array density by applied voltage, fine tuning this by solution pH and electrolyte concentration. 1,2,6 The balance between NP-interface attraction (due mostly to the applied electric field) and NP-NP electrostatic repulsion due to residual negative charges of dissociated terminal acidic groups, allows establishing the optimal NP density on the surface packing into almost ideal hexagonal arrays.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation