Casimir–van der Waals Atomic Layer Deposition Films for Selective Ion Sensors

PROBLEM: An ALD film on a selective ion sensor sets both the chemical surface and the nanometre gap over which dispersion forces act, so thickness changes shift the sensor's response through two mechanisms at once. A calibration that attributes all change to chemistry will be wrong whenever the dispersion contribution moves. Sensor records must therefore preserve thickness, chemistry, and dispersion model together.

SOLUTION: Storage Copy Data Management would provide a governed record capability that retains ALD thickness and composition, DFT binding predictions, Casimir/van der Waals dispersion-force models, and measured sensor responses for each film batch. The capability would version each calibration, retain isotherm validation, and make the full lineage retrievable for audit. It manages sensor evidence rather than asserting selectivity.

EVIDENCE BASIS: Casimir/van der Waals dispersion forces are DOCUMENTED: quantum-fluctuation forces between uncharged surfaces at nanoscale; Casimir measured 1997 (Lamoreaux). DFT is based on Hohenberg–Kohn 1964 and Kohn–Sham 1965, Nobel Prize 1998. Biosorption binding follows R−COOH + M2+ ⇌ R−COOM+ + H+ and is validated by batch isotherms, qe = (C0 − Ce)V/m, Langmuir and Freundlich isotherms, textbook DOCUMENTED. Source: Lamoreaux 1997 Casimir measurement and textbook DFT and biosorption isotherm literature as summarised in the batch method.