Sequential ‐Dependent Synthesis of Bimetallic Silver‐Chromium Nanoparticles for Multichannel Sensing, Logic Computing, and 3 in 1 Information Protection

Bimetallic silver-chromium nanoparticles are synthesized in a simple, rapid, sequence-dependent method, and it can be used for multichannel dynamic selective detection of hypochlorite and realizing the advanced 3 in 1 information protection, including authorization (corresponding to molecular keypad lock), encryption, and steganography in three dimensions and types. AbstractBimetallic nanomaterials (BNMs) have been used in sensing, biomedicine, and environmental remediation, but their multipurpose and comprehensive applications in molecular logic computing and information security protection have received little attention. Herein, This synthesis method is achieved by sequentially adding reactants under ice bath conditions. Interestingly, Ag-Cr NPs can dynamically selectively sense anions and reductants in multiple channels. Especially, ClO− can be quantitatively detected by oxidizing Ag-Cr NPs with detection limits of 98.37  nM (at 270 nm) and 31.83 nM (at 394 nm). Based on sequential-dependent synthesis process of Ag-Cr NPs, Boolean logic gates and customizable molecular keypad locks are constructed by setting the reactants as the inputs, the states of the resulting solutions as the outputs. Furthermore, dynamical ly selective response patterns of the Ag-Cr NPs can be converted into binary strings to exploit molecular crypto-steganography to encode, store, and hide information. By integrating the three dimensions of authorization, encryption, and steganography, 3 in 1 ...
Source: Small - Category: Nanotechnology Authors: Tags: Research Article Source Type: research