Dear Judy,
I do not know about the parameters you are asking about, however, I just
wanted to note you that you should be aware of tip convolution effects
in AFM measurements. I do not know the size of your particles and the
tip dimensions but, in principle, the height of the particle would be a
more reliable measurement than its lateral dimensions as in the later
the tip convolution effects will be more marked.
Regards,
Luis
El 17/10/2014 4:07, Judy Phan escribió:
Hi,
I'm working on a project where particles are collected and imaged
using the AFM. I've been getting myself familiar with Gwyddion
software. My goal is to be able to quantify the particles using the
grain properties tools but since I'm working with multiple particles,
I need to normalized their properties in order to compare them. So
far, I saw people done 2-D parameters such as elongation, convexity,
circularity, etc. Does anyone know what are the 3-D parameters? I
think comparing the ratios of the major and minor semiaxis of
equivalent ellipse with the mean height will give me some sort of
elongation. For convexity (surface roughness), in 2-D it is a ratio
between the particle area and the total area. Is projected area the
total area? And is the surface area actually the particle area? I'd
like to translate this to 3-D ratio.
Thanks,
--
Judy Phan
Master of Science in Chemical Engineering, 2015
Bachelor of Science in Chemical Engineering with Cum Laude, 2013
Bucknell Engineering Network Student Liaison
Chair of the Banquet & Society Activities Committee of Tau Beta Pi
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