Tufts researchers have discovered a new, faster way to image materials at the nano level, an advance that could speed the detection of cancer and assist in the development of new high-tech materials.
The new method was discovered by Igor Sokolov, a professor of mechanical engineering, and Maxim Dokukin, a postdoctoral scholar in Sokolov’s lab. It extends the capacity of atomic force microscopy (AFM), a technology available since 1989 that allows imaging of samples down to the sub-nanometer level.
“This imaging mode will enable further scientific and technological understanding and help develop new materials and processes,” Sokolov said. “Better detection of cancer cells is what we have on the horizon at our lab. But it will also be most impactful in the area of nanocomposites and new multiphase polymers such as organic-inorganic biocomposites, in which the structure of materials down to the nanoscale is of critical importance.”
The Tufts researchers discovered a way to use new channels of information that had been traditionally discarded as noise in existing commercial AFM imaging methods. What they call the “ringing method” allows “more robust and novel information about the surface of biologically relevant materials, cells, and polymers,” the researchers wrote. When applied to soft materials, in particular cells, imaging can be done up to 20 times faster than conventional AFM methods.
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