Nanomechanical measurements of cells and single molecules with atomic force microscopy (AFM) require accurate calibration of two parameters: the spring constant of the cantilever (k) and the inverse of the optical lever sensitivity (InvOLS). The most established calibration approach in liquid involves determining the InvOLS by acquiring force-distance curves on a stiff surface. k is t... https://thehookahlabes.shop/product-category/hookah-tongs/