Multipurpose Force Tool for Quantitative Nanoscale Analysis and Manipulation of Biomolecular, Polymeric and Heterogeneous Materials (FORCE-TOOL)
Sprache der Bezeichnung:
Englisch
Original Kurzfassung:
FORCETOOL (FT) proposes to develop a multipurpose tool for quantitative
nanoscale analysis and manipulation of biomolecular, polymeric and heterogeneous surfaces. Key features of the proposed instrument
are 1 nm spatial resolution and 1 pN force sensitivity; operation in technological relevant environments (air or liquids) and with
no impact on the sample surface. The multifunctionality and flexibility of FT will enable characterization, control or manipulation
of structures on a nanometer-scale, so it will open new approaches for manufacturing at molecular and nanoscale levels. This tool
is based on two innovative concepts : (i) the bi-modal AFM and (ii) the multimaterial methodolody. The bi-modal AFM concept considers
the cantilever as a three dimensional object with several resonance modes, in particular two. The concept departs radically from the
established principles of dynamic force microscopy (only the fundamental mode is considered). The double excitation allows to
separate topography from composition contributions in the experimental data. Furthermore, the bi-modal AFM is about two orders of
magnitude more sensitive to force variations than state of the art tapping mode AFMs. The multimaterial methodology will allow to
transform the amplitude, frequency or phase shift changes measured by the instrument into quantitative information about the sample
properties. The multimaterial methodology has both a general framework to describe dynamic force microscopy interactions and
specific codes to be used with different materials such as inorganic materials, biomolecules, polymers or molecular architectures.
Specific key goals are: Topography, composition analysis and manipulation of biomolecules, polymers and heterogeneous surfaces;
operation in air or liquids environments; 1 nm spatial resolution and 1 pN force sensitivity; compatibility with existing atomic
force microscopes