Gold bipyramids molecularly imprinted gel colorimetric device for whole blood cholesterol analysis

Quantifying Shape Transition in Anisotropic Plasmonic Nanoparticles through Geometric Inversion. Application to Gold Bipyramids

“…Anisotropic plasmonic nanoparticles stand out in finely tuning their localized surface plasmon resonance (LSPR) and creating strong electric fields by precisely adjusting the nanoparticle aspect ratio, particularly the length-to-width ratio, surpassing the impact of size variations in isotropic nanoparticles. − While gold (Au) nanorods remain the most versatile and consolidated type of anisotropic nanoparticles, − Au bipyramids (AuBPs) become an optimal alternative due to a superior number of physical properties and applications across plasmon resonance, ,− electric field enhancement, ,,− thermal stability, coupling processes, − sensing capabilities, − photocatalysis, , acoustic characteristics, and nonlinear optics. − Tuning the shape and size of plasmonic nanoparticles under optical excitation can initiate/elicit chemical transformations near/on their surfaces . These processes leverage the enhanced localized electric fields associated with plasmon excitation (by photothermal effect and/or hot carriers generation), presenting possibilities to drive reduction or oxidation reactions. − Also, AuBPs are particularly appealing for bottom-up fabrication, offering a wide range of structural diversity in two-dimensional (2D) systems and three-dimensional (3D) supercrystals .…”