... the DNA concentration of 0.5 M According to the calibration, the increased deflection indicates that the cantilever bends downward, away from the DNA-coated side (the probe DNA is coated on the ... Hagan, A K Chakraborty, and A Majumdar, Proc Natl Acad Sci U.S .A 98, 1560 (2001) G Wu, R H Datar, K M Hansen, T Thundat, R J Cote, and A Majumdar, Nat Biotechnol 19, 856 (2001) C A Savran, T P Burg, ... buffer (Calbiochem, La Jolla, CA) at room temperature The functionalized cantile- X R Zhang and X Xu FIG Detection of microcantilever deflection induced by DNA hybridization (hand injections of 0.5...