Nanoscope III vs Nanoscope IIIa

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John Thornton replied on Fri, Oct 25 2013 2:20 PM

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Hi Hari,

There are 2 primary differences between the NanoScope III and IIIa controllers

- The IIIa controller allows the use of "Z Modulation," which was used for TappingMode in fluid on the AFM systems at that time that used the Dimension scanner, such as the Dimension 3000, 3100, 5000, and original BioScope.  The fluid cantilever holder did not have a piezo for oscillating the cantilever, so we would oscillate the Z scanner for fluid tapping.  To do this, we would enable the "Z Modulation" parameter, which was available on the NanoScope IIIa controller, and not the NanoScope III controller.  This would redirect the Drive Frequency and Drive Amplitude signals from the cantilever holder to the Z scanner when this parameter was Enabled.  Later, we came out with a fluid cantilever holder for the Dimension which includes a piezo to oscillate the probe directly (Direct Drive Fluid Cell for Dimension), so we no longer needed to use Z Modulation for fluid tapping on Dimension systems.  This did not effect the MultiMode, since the fluid Tapping cantilever holder includes a piezo to oscillate the probe.

- The NanoScope IIIa had more Auxillary inputs than the NanoScope III.

I hope this answers your question.

John

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Hari replied on Fri, Oct 25 2013 2:33 PM

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Hi John,

That makes perfect sense !

Its nice to know that Z modulation can in theory used for TappingMode with a passive fluid cell.

Thanks !

Best,

Hari