A two-fold SPR-SERS sensor utilizing gold nanoparticles and graphene thin membrane as a spacer in a 3D composite structure.

Localized surface plasmonic resonance (LSPR) biosensing using optical fibers has gained popularity due to its label-free approach and high sensitivity to changes in the nanoparticle surface's local index of refraction. However, improving sensitivity remains a challenge. In this study, a two-step approach was employed to fabricate a composite structure using gold nanoparticles and monolayer graphene (Gr-AuNPs).

The versatile characteristics of Ars/SGaInS van der Waals heterostructures.

Two-dimensional (2D) materials with upright stacking form layered van der Waals heterostructures (vdWHs) are currently believed to be attractive prospects for optoelectronic, photocatalytic, and thermoelectric devices because they can merge the capabilities of distinct 2D materials. Herein, we evaluate the electronic, optical, photocatalytic, and thermoelectric response of model-I and model-II of Ars/SGaInS vdWHs first-principles computations. The energetic, dynamical, and thermal stabilities of these vdWHs suggest great promise in experimental functionality.