for Force curve measurement of Bio samples

Characteristics

Two types of cantilevers suitable for force curve measurements of bio samples. A lever (60µm long) : Low noise cantilever B lever (100µm long) : Small spring constant cantilever Gold on both sides of cantilever Gold coating on the tip side makes functionalizing the tip easier (e.g., using thiol chemistry) The tip is located at the very end of the cantilever. Since the tip isn't hidden by the body of cantilever, it can be positioned exactly at a point of interest using an optical microscopy. Sharp and tall V-shaped tip The radius of curvature of the tip is 40nm or less (30 nm typ.). The tip height is more than 5µm high to help preventing the body of the cantilever from touching a specimen. Two choices of product units, Small quantity unit and Half wafer unit. Pre-separated chips offered in Gel-Pak case (Small quantity unit 24 chips/unit ) A half wafer unit contains 6 strips of chip arrays ,or 210 chips per unit.

Cantilever
The rectangular silicon nitride cantilevers with both-side gold coating show the mechanical properties below. A lever is the shortest and B lever is the softest cantilever commercially available (as of Aug. 2001).

	A lever	B lever
Length x width	60µm x 30µm	100µm x 30µm
Thickness	180nm (incl. gold coating)
Resonant Freq	37 kHz	13 kHz
Spring const.	30 pN/nm (0.03 N/m)	6 pN/nm (0.006 N/m)

Lever and tip material Silicon nitride
Thickness of gold coating tip side 20 nm Reflex 30 nm

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