TY - JOUR
T1 - Quantitative friction map on surface composed of β-cyclodextrin monolayer
AU - Sadaie, Megumi
AU - Nishikawa, Naoki
AU - Kumashiro, Yoshikazu
AU - Ikezawa, Yasunori
AU - Kumagai, Yuuki
AU - Marino, Kenji
AU - Ohnishi, Satomi
AU - Tamada, Kaoru
AU - Hara, Masahiko
PY - 2007/12/6
Y1 - 2007/12/6
N2 - Our developing method "quantitative friction map" enables us to compare the spatial distribution of friction forces on the surface among separately scanned samples sensitively. We applied this technique to evaluate the friction acting between mono-[6-deoxy-6-[(mercaptoethyl)amino]]-β- cyclodextrin (β-CD-EA-SH) and OH-terminated C11 alkanethiol (OH-C11-SH) self-assembled monolayers (SAMs) in terms of symmetric and asymmetric features. The friction acting between symmetric β-CD-EA-SH SAMs is significantly larger than that acting between asymmetric β-CD-EA-SH SAM vs OH-C11-SH SAM and symmetric OH-C11-SH SAMs, although all the surfaces are commonly composed of hydroxyl terminated groups. The different frictional forces on these surfaces are closely correlated with the different adhesion forces, in which symmetric β-CD-EA-SH SAMs exhibited 1.5- and 1.3-fold larger pull-off force than β-CD-EA-SH SAM vs OH-C11-SH SAM and symmetric OH-C11-SH SAM vs OH-C11-SH SAM, respectively. Both force data can be explained by the "specific interactions" between glucose units on cyclodextrin heads rather than the deformation of the SAM by cantilever scanning.
AB - Our developing method "quantitative friction map" enables us to compare the spatial distribution of friction forces on the surface among separately scanned samples sensitively. We applied this technique to evaluate the friction acting between mono-[6-deoxy-6-[(mercaptoethyl)amino]]-β- cyclodextrin (β-CD-EA-SH) and OH-terminated C11 alkanethiol (OH-C11-SH) self-assembled monolayers (SAMs) in terms of symmetric and asymmetric features. The friction acting between symmetric β-CD-EA-SH SAMs is significantly larger than that acting between asymmetric β-CD-EA-SH SAM vs OH-C11-SH SAM and symmetric OH-C11-SH SAMs, although all the surfaces are commonly composed of hydroxyl terminated groups. The different frictional forces on these surfaces are closely correlated with the different adhesion forces, in which symmetric β-CD-EA-SH SAMs exhibited 1.5- and 1.3-fold larger pull-off force than β-CD-EA-SH SAM vs OH-C11-SH SAM and symmetric OH-C11-SH SAM vs OH-C11-SH SAM, respectively. Both force data can be explained by the "specific interactions" between glucose units on cyclodextrin heads rather than the deformation of the SAM by cantilever scanning.
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U2 - 10.1143/JJAP.46.7838
DO - 10.1143/JJAP.46.7838
M3 - Article
AN - SCOPUS:37549021848
SN - 0021-4922
VL - 46
SP - 7838
EP - 7845
JO - Japanese Journal of Applied Physics
JF - Japanese Journal of Applied Physics
IS - 12
ER -