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Don, I think you would find that the gas humidity will not increase substantially with just one pass through a simple gas bubbler. So it will still be suitable for drying a sample. I should have made that point more explicitly. It's why I mentioned that additional effort is required in this sort of configuration if you do want to introduce substantial
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I think "bubble trap" probably refers to something like this: http://en.wikipedia.org/wiki/Gas_bubbler where the idea is that particulates get stripped from the gas as it passes through water in the bubbler. I did this years ago to try to get a humidified gas stream. That took some extra effort to increase the gas-liquid contact area and contact
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The non-contact value in the baseline region of force curves is arbitrary. It depends on how you have adjusted your vertical deflection signal. Actually, since it is normally "deflection error" it will be the raw deflection signal minus the deflection setpoint. All forces in the curve must be measured relative to the baseline force, which
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Yes, Point and Shoot might work. There should be a parameter in ramp mode under the "Mode" group called "XY move on surface." If enabled, it should move the tip in feedback from one Point and Shoot location to another. I'm not sure, however, if this motion is a straight line or two orthogonal steps. -Ben
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Alex, I think this should be possible, though I can't be sure that it's a use case that's been tested since Adaptive Scan was introduced at the same time as PeakForce QNM. If you try it and find otherwise, please let me know. -Ben
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If you don't mind a fully manual procedure, then you could just use the XY offset parameters to move the tip in a square pattern while the scan size is set at 0. The offsets move in feedback. So if you engage in contact mode with zero scan size, adjust the setpoint to a high enough force that you will scratch, and then adjust the offsets appropriately
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You can use a "relative trigger" on the deflection signal to control the maximum tip-sample force in a ramp mode force-distance curve. For instance, if you set a relative trigger of 1nN, you will find that the force curve extends until the force reached 1nN and then retracts from that point. I know it seems overconstrained by the ramp size
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Alex, The five ROI limit is intentional. Apparently these are memory intensive. Remember though that the ROI settings are saved when you save the MIRO canvas. So you can always save your current ROI settings, then modify and save again under a different filename. You don't need to recreate anything. Also remember that you can have up to 8 layers
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This paper is a good review of the options for both lateral deflection sensitivity and lateral spring constant: Torbjörn Pettersson, Niklas Nordgren, Mark W. Rutland, and Adam Feiler. "Comparison of different methods to calibrate torsional spring constant andphotodetector for atomic force microscopy friction measurements in air and liquid
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Jerry, Please be sure you are using the latest NanoScope Analysis version (see here ). I think I remember an export bug being fixed back a version or two ago. Also be sure to check the new Export feature under the Analysis menu. I'm assuming here that you are using the old right-click export functionality. The new Export feature offers a lot more