CISS-Based LbL Selective Ion Sensors

TITLE: CISS-Based LbL Selective Ion Sensors

PROBLEM: An ion sensor that uses chiral layers could in principle separate ions by their spin-selective interaction, adding a discrimination channel beyond ordinary binding affinity. LbL films can present chiral groups in sequence, but sensor ideas rarely state which layer provides the chiral step, which provides binding, and how the spin-filtered signal reaches the electrode. A shared proposal space is needed to make those assignments explicit before fabrication.

SOLUTION: IBM Cloud Ideas would host proposals for CISS LbL sensors that attach the chiral layer sequence, DFT-predicted binding groups, intended spin-selective readout, and energy budget to each idea. Contributors could compare room-temperature water-based variants and require regeneration accounting before an idea is marked test-ready. The shared record would keep the chiral, binding, and readout roles distinct so reviewers can judge whether the design is coherent.

EVIDENCE BASIS: CISS — chiral molecules transmit one electron spin preferentially; observed in DNA, peptides, and helicenes since 1999; DOCUMENTED as a phenomenon, device-scale use REPORTED/emerging. DFT (Kohn–Sham) predicts surface-group binding; Hohenberg–Kohn 1964, Kohn–Sham 1965, Nobel 1998. Biosorption validation via batch isotherms and Langmuir/Freundlich models is textbook DOCUMENTED. Source: CISS literature since 1999; standard textbooks.