Quantum Confinement in Atomic Layer Deposition Oxide Layers for Selective Ion Sensing

TITLE: Quantum Confinement in Atomic Layer Deposition Oxide Layers for Selective Ion Sensing

PROBLEM: A selective ion sensor built on an ALD oxide layer must keep its sensing interface stable in water while still letting the target ion reach the quantum-confined sensing layer. Conformal ALD coatings can protect the interface, but they can also damp the signal or shift selectivity if the oxide chemistry is not matched to the ion. Sensor developers need a shared, governed place to compare oxide recipes against DFT predictions and measured isotherms before choosing one.

SOLUTION: IBM Cloud Ideas would host a governed capability registry for quantum-confinement-tuned ALD sensor layers, linking each oxide thickness and composition to its DFT binding prediction, its batch-isotherm validation, and its intended ion. The workspace would require regeneration accounting for reusable sensors and keep deposition, curing, and regeneration energy in the design record.

EVIDENCE BASIS: DOCUMENTED — quantum dots show size-tunable band gaps via quantum confinement; ALD deposits angstrom-precise conformal oxide layers; DFT (Kohn–Sham 1965) predicts surface-group binding; biosorption is validated by qe = (C0 − Ce)V/m and Langmuir/Freundlich isotherms. Source: Hohenberg–Kohn 1964; Kohn–Sham 1965; standard biosorption textbooks.