However, like other scanning probe microscopies, it provides only limited chemical information of the system studied. Rational interpretation of a variety of chemical functionalites mapping and processes such as ionization and protonation can be made based on the knowledge of these forces. Schematic drawing of the Chemical Force Microscopy setup. The tips and substrate are first cleaned in pirhana solution to create Si-OH groups on their surface. Then, they are immersed in organic tri-chloro silane which reacts with the silianol groups to form a dense monolayer.
Carbon nanotube probes with controlled chemical functionality at the openning end.
Nb substrate in an ambient oxygen environment to produce carboxy groups at the open end of the nanotube. The tips were then washed with 0.1M solution of MES and NaCl, followed by deionized water. Force Titration Fig. Adhesion force titration curves recorded in buffered solutions. Force microscopy images of a photopatterned SAM sample.