ArticleACS omega2026
Surface Enhanced Raman Spectroscopy of Planetary Materials Using Laser Deposited Plasmonic Gold Nanoparticles.
Article in ACS omega, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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9 authors.
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Abstract
Detection of trace materials on planetary surfaces and changes to the surface composition or structural modifications is important for identifying contaminants and other near-surface changes that may contain valuable geological information. This work demonstrates a surface-enhanced raman spectroscopy (SERS) approach based on laser deposition of Au plasmonic nanoparticles onto several relevant mineral surfaces. A pulsed 1064 nm wavelength laser is used to ablate a thin gold film and deposit Au nanoparticles directly onto selected regions of an olivine mineral sample as the substrate, enabling localized in situ SERS probing. Thin surface layers of four examples of relevant planetary simulants, such as CSM-LHT, JSC-RN, OPRH4-W30, and NU-LHT-4M, which identify as lunar highland and Martian soil analogs, were deposited on olivine substrate to emulate surface-level deposits. After nanoparticle deposition on simulants, Raman features associated with these plagioclase-rich simulants became significantly more distinct, whereas conventional Raman measurements of the same thin layers produced only weak or incomplete signatures. The technique was also shown to detect a mixed surface layer containing JSC-RN simulant and TiO
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