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Does anyone know if it is possible to work with NC-AFM (amplitude modulated) in air to acquire high resolution of molecules such as C60, pentacene, etc... I have seen impressive results of high resolution molecular images but so far they were obtained in UHV at low temperatures. Is Bruker working to offer a machine with this imaging mode?
Thank you ,
Luci
Hi Luci,
At this point Bruker does not offer a low temp, UHV system. We do offer a glove box if you are interested to work in clean enviroments as Thomas pointed out here: http://nanoscaleworld.bruker-axs.com/nanoscaleworld/forums/t/850.aspx
Even though the glovebox provides impressives specs it is of course not UHV. Electrochemical environemts can be made very clean and you may want to look into a few papers here if you are interested in high resolution work.
Bruker AFMs operate in AM mode and you as the user have the choice to choose where on the resonance peak you want to sit, which amplitude you want to excite the cantilever at, and what setpoint you want to work with. So, its all yours to explore.
You may want to look at PeakForce tapping. Much easier to operate, way more reliable, and with the additional advantage of direct force control which allows you to extract mechanical information in a straightforward fashion. Check out the lastest paper in Nano letters from Felix Rico et al: Mechanical Mapping of Single Membrane Proteins at Submolecular Resolution.
Dear Stefan,
Thank you for the information.