Metal

Molybdenum disulfide

Catalysis

Raman scattering

Raman spectroscopy

Phase (matter)

Engineering

Yield (engineering)

Metallurgy

Materials science

Mineralogy

Graphene

Transition metal

Molecule

Chemical engineering

Physics

Nanotechnology

Organic chemistry

Optics

Surface modification

Composite material

Medicine

Chemistry

Crystal violet

Covalent bond

Rhodamine 6G

Exfoliation joint

Pathology

Chemistry of Materials

Molybdenum disulfide (MoS2), a promising two-dimensional transition-metal dichalcogenide, presents a challenge in the tuning of its optoelectronic and chemical properties. Herein, we demonstrate an efficient route to alter the crystalline structure of MoS2 by chemical exfoliation. Using NaK metal alloys, exfoliated and covalently functionalized MoS2 derivatives were obtained with a high metallic (1T) phase ratio, up to 94.5%. Consequently, exfoliated MoS2 showed a significant surface-enhanced Raman scattering activity toward rhodamine 6G (R6G) and crystal violet, with low detection limits. The versatility of this approach allows the covalent functionalization of MoS2 without relying on edge or basal-plane defects of the structure and preserving the high-ratio 1T phase.

High-Yield Preparation of Exfoliated 1T-MoS<sub>2</sub> with SERS Activity

High-Yield Preparation of Exfoliated 1T-MoS2 with SERS Activity

High-Yield Preparation of Exfoliated 1T-MoS₂ with SERS Activity