Detection of small molecules with surface plasmon resonance by synergistic plasmonic effects of nanostructured surfaces and graphene

Plasmonic Enhancement of NIR to UV Upconversion by a Nanoengineered Interface Consisting of NaYF4:Yb,Tm Nanoparticles and a Gold Nanotriangle Array for Optical Detection of Vitamin B12 in Serum

“…Glass slides were cleaned in a piranha solution (3:1, v/v, mixture of concd H 2 SO 4 and 30%, w/w, H 2 O 2 ) for 90 min and then in a 5:1:1 (v/v/v) mixture of water, ammonia, and hydrogen peroxide for 60 min. Triangle arrays were prepared according to a modified protocol described by Genslein et al In brief, polystyrene particles were dispersed in a water/ethanol solution with a ratio of 87:13 (v/v) and a concentration of 13 mg·mL –1 . A spherical mask of particles with a diameter of 1.04 ± 0.04 μm was formed on the glass substrate by drop-coating 40 μL of the particle dispersion.…”