New-type NdFeB composite SERS substrate: Gradient magnetic field regulates hot spot enhancement of raman signal
Peer-Reviewed Publication
Updates every hour. Last Updated: 26-Oct-2026 00:16 ET (26-Oct-2026 04:16 GMT/UTC)
The existing magnetic-responsive SERS substrates have difficulty in regulating the spatial coupling between the carrier of the analyte and the plasmonic hotspots, which limits the enhancement effect. This study uses NdFeB/PS/Ag as the plasmonic substrate and the core-shell magnetic nanoparticles (Fe3O4@SiO2@Ag) (FSA) as the molecular capture carrier. By adjusting the magnetization state and magnetic field gradient of the NdFeB sheet, the spatial distribution of FSA particles can be controllably regulated.
Transition-metal sulfides can accelerate sulfur reactions in all-solid-state lithium-sulfur batteries, but their own stability during cycling has received less attention. Researchers uncovered two major catalyst failure pathways and used these insights to develop a compositionally disordered catalyst. The new design suppresses phase separation and transition metal migration while maintaining carrier transport, enabling efficient sulfur conversion under demanding battery conditions.
Where world-class science meets independent journalism: Apply to ISTA’s 2027 Journalist in Residence Program
Application deadline: November 1, 2026
Start: Spring 2027
The Institute of Science and Technology Austria (ISTA) is now accepting applications for its 2027 Journalist in Residence program.
ISTA invites experienced science and technology journalists to spend three to six months on its international campus near Vienna. Meet leading scientists, experience curiosity-driven basic research up close, and discover new ideas across disciplines.
Beauty and mystery – it is hard to imagine a more alluring combination, and this is precisely what we encounter when we observe phenomena in the nanoworld. But are we really sure that observations made using modern microscopic techniques do not influence what is happening there? The answers are provided by Cracow scientists. A comparison of images of copper oxide nanoparticles reacting with chloroauric acid, obtained using electron and photon beams, has yielded unexpected results.