Title: interfacial layer width
Long Title: IUPAC Gold Book - interfacial layer width
DOI: 10.1351/goldbook.I03086
Status: current

Definition
The characteristic length defined by the variance of the Gaussian function fitted to the gradient of the electron density profile established by X-ray specular reflectivity studies of the liquid interface.

Related Terms
- characteristic length: https://goldbook.iupac.org//terms/view/C00977
- electron density: https://goldbook.iupac.org//terms/view/E01986
- gradient: https://goldbook.iupac.org//terms/view/G02669
- interface: https://goldbook.iupac.org//terms/view/I03082
- reflectivity: https://goldbook.iupac.org//terms/view/R05235

Source
- PAC, 1994, 66, 1667. 'Thin films including layers: terminology in relation to their preparation and characterization (IUPAC Recommendations 1994)' on page 1674 (https://doi.org/10.1351/pac199466081667)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/I03086/html
- json: https://goldbook.iupac.org/terms/view/I03086/json
- xml: https://goldbook.iupac.org/terms/view/I03086/xml

Citation: Citation: 'interfacial layer width' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.I03086
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Accessed: 2026-05-11T20:57:32+00:00