Struct DoubleLayerCapacitance 

pub struct DoubleLayerCapacitance {
    pub concentration_mol_m3: f64,
    pub permittivity: f64,
    pub temperature: f64,
}

Gouy-Chapman-Stern (GCS) model for the electrical double layer.

Models the differential capacitance of the diffuse layer as a function of potential difference across the Helmholtz layer.

The Debye length κ⁻¹ = sqrt(ε·RT / (2·n0·F²)) where n0 is bulk ion concentration [mol/m³] and ε is permittivity [F/m].

Fields

concentration_mol_m3: f64

Bulk ion concentration [mol/m³] (symmetric 1:1 electrolyte)

permittivity: f64

Permittivity of solvent [F/m] (water ≈ 78.5 × ε_0)

temperature: f64

Temperature [K]

Implementations

impl DoubleLayerCapacitance

pub fn new( concentration_mol_m3: f64, permittivity: f64, temperature: f64, ) -> Self

Create a new double-layer model.

pub fn kcl_01_mol_l() -> Self

Aqueous KCl at 0.1 mol/L and 25°C.

pub fn debye_length(&self) -> f64

Debye length [m]: κ⁻¹ = sqrt(ε·R·T / (2·c·F²))

pub fn capacitance_at_pzc(&self) -> f64

Diffuse-layer capacitance per unit area [F/m²] at the potential of zero charge.

C_d = ε / κ⁻¹

pub fn differential_capacitance(&self, psi: f64) -> f64

Differential capacitance [F/m²] at potential ψ [V] (linearised GC model).

C(ψ) = ε * κ * cosh(F·ψ / (2·R·T))

Trait Implementations

impl Clone for DoubleLayerCapacitance

fn clone(&self) -> DoubleLayerCapacitance

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for DoubleLayerCapacitance

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.