Mapping orientation differences of terminal functional groups by friction force microscopy

Analytical Chemistry

Volumn 70, Issue 24, 1998, Pages 5209-5212

  Wong, Sze Shun ^a   Takano, Hajime ^a   Porter, Marc D ^a  

^a NONE

Author keywords

[No Author keywords available]

Indexed keywords

ORGANIC COMPOUND;

ANALYTIC METHOD; ARTICLE; CHEMICAL ANALYSIS; IMAGE ANALYSIS; SCANNING ELECTRON MICROSCOPE; SPATIAL ORIENTATION; STRUCTURE ANALYSIS; TECHNIQUE;

EID: 0032534773     PISSN: 00032700     EISSN: None     Source Type: Journal    
DOI: 10.1021/ac9807870     Document Type: Article

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34. These differences, which are found using hexadecane as the wettability probe liquid, are only just observed above the ±1° repeatability of the measurement We also see a 2° variation when using water as the probe liquid: Wong, S.-S.; Takano, H.; Porter, M. D., unpublished results.
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46. This estimate of resolution is based upon an analysis (see ref 8) of 2-μm-sized images, which were collected by scanning across partial portions of the patterned domains of the samples in Figure 2A,B. Issues related, for example, to the differences in the friction between domains, however, must be considered when attempting to translate the resolution estimated for the arrays in Figure 2A,B to other samples.
47. The friction responses reported in Figure 3 are approximately twice that described in our previous work (see ref 23). This difference is attributed to differences in the types of tips used in the two separate studies. Our earlier data were obtained using conventional silicon nitride tips, whereas the results in Figure 3 were acquired using oxide-sharpened tips. Thus, differences in the size, shape, and probable surface composition of the two types of tips result in the observed differences in the FFM-measured friction. Factors such as the mechanical properties of the tip, sample, and tip - sample microcontact, all of which we are presently attempting to detail further, also play roles that are not well understood.
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