Experimental study demonstrates scalable fabrication of silver films on ionic liquids via chemical vapor deposition, highlighting high sensitivity and reproducibility for molecular sensing.
Silver nanostructured films are fabricated on the surface of 1-butyl-3-methylimidazolium tetrafluoroborate ionic liquid via a modified liquid-phase chemical vapor deposition approach, yielding highly uniform and reproducible surface-enhanced Raman scattering (SERS) substrates with excellent sensing sensitivity. Benefiting from the superior atomic diffusivity and weak interfacial confinement of the liquid substrate, the as-deposited Ag nanostructures generate robust plasmonic coupling and uniformly distributed hot spots, which serve as two critical factors for achieving prominent Raman signal enhancement. Rhodamine 6G is employed as a probe molecule to systematically investigate the SERS performance of the fabricated substrates by varying the mass of silver powder and the deposition distance. Combined with finite-difference time-domain (FDTD) simulations, the results confirm that optimized deposition parameters significantly improve the Raman signal intensity, substrate uniformity, and detection reproducibility. This work provides a feasible and controllable strategy for the construction of liquid-template-assisted Ag nanostructures and establishes a reliable platform for the design and preparation of high-performance SERS sensing devices.
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Ye et al. (2026) studied this question.
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