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(a) Graphical depiction of finite element method analysis of elastic post sensor with dia. of 3 μm and height of 13.4 μm. Bending of post is in response to horizontal traction force of 20 nN applied on top surface of PDMS post. Colour chart indicates horizontal displacement under 20 nN traction force. (b) Displacement of centre of post top as function of applied traction force on post top. Nominal spring constant of PDMS posts can be derived from slope of displacement curve.
