Multifunctional Antimonene‐Silver Nanocomposites for Ultra‐Multi‐Mode and Multi‐Analyte Sensing, Parallel and Batch Logic Computing, Long‐Text Information Protection

Abstract To simulate life's emergent functions, mining the multiple sensing capabilities of nanosystems, and digitizing networks of transduction signals and molecular interactions, is an ongoing endeavor. Here, multifunctional antimonene‐silver nanocomposites (AM‐Ag NCs) are synthesized facilely and fused for molecular sensing and digitization applications (including ultra‐multi‐mode and multi‐analyte sensing, parallel and batch logic computing, long‐text information protection). By mixing surfactant, AM, Ag + and Sodium borohydride (NaBH 4 ) at room temperature for 5 min, the resulting NCs are comprised of Ag nanoparticles scattered within AM nanosheets and protected by the surfactant. Interestingly, AM‐Ag NCs exhibit ultra‐multi‐mode sensing ability for multiplex metal ions (Hg 2+ , Fe 3+ , or Al 3+ ), which significantly improved selectivity (≈2 times) and sensitivity (≈400 times) when analyzing the combined channels. Moreover, multiple sensing capabilities of AM‐Ag NCs enable diverse batch and parallel molecular logic computations (including advanced cascaded logic circuits). Ultra‐multi‐mode selective patterns of AM‐Ag NCs to 18 kinds of metal ions can be converted into a series of binary strings by setting the thresholds, and realized high‐density, long‐text information protection for the first time. This study provides new ideas and paradigms for the preparation and multi‐purpose application of 2D nanocomposites, but also offers new directions for the fusion of molecular sensing and informatization.