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Synergistic ROS Generation via Core–Shell Nanostructures with Increased Lattice Microstrain Combined with Single-Atom Catalysis for Enhanced Tumor Suppression

Year: 2024

Type: article

Abstract: High Resolution Image Download MS PowerPoint Slide This study emphasizes the innovative application of FePt and Cu core–shell nanostructures with increased lattice microstrain, coupled with Au single-atom catalysis, in significantly enhancing • OH generation for catalytic tumor therapy. The combination of core–shell with increased lattice microstrain and single-atom structures introduces an unexpected boost in hydroxyl radical ( • OH) production, representing a pivotal advancement in strategies for enhancing reactive oxygen species. The creation of a core–shell structure, FePt@Cu, showcases a synergistic effect in • OH generation that surpasses the combined effects of FePt and Cu individually. Incorporating atomic Au with FePt@Cu/Au further enhances • OH production. Both FePt@Cu and FePt@Cu/Au structures boost the O 2 → H 2 O 2 → • OH reaction pathway and catalyze Fenton-like reactions. This enhancement is underpinned by DFT theoretical calculations revealing a reduced O 2 adsorption energy and energy barrier, facilitated by lattice mismatch and the unique catalytic activity of single-atom Au. Notably, the FePt@Cu/Au structure demonstrates remarkable efficacy in tumor suppression and exhibits biodegradable properties, allowing for rapid excretion from the body. This dual attribute underscores its potential as a highly effective and safe cancer therapeutic agent.

Source: ACS Applied Materials & Interfaces

DOI: 10.1021/acsami.4c10392