TY - JOUR
T1 - Adsorption behaviors of V 2 O 5 nanowires on binary mixed self-assembled monolayers
AU - Koo, Jae Pil
AU - Kim, Yong Kwan
AU - Ha, Jeong Sook
N1 - Funding Information:
This work was supported by Grant No. R01-2005-000-10648-0 (2005) from the Basic Research Program of the Korean Science and Engineering Foundation and Grant No. KRF-2004-005-C00068 from Korea Research Foundation.
Copyright:
Copyright 2019 Elsevier B.V., All rights reserved.
PY - 2006/11/30
Y1 - 2006/11/30
N2 - The adsorption behaviors of V 2 O 5 nanowires on binary mixed self-assembled monolayers (SAMs) were investigated with variation of the mixing ratio of two differently terminated thiolates on Au. Hydroxyl-covered V 2 O 5 nanowires showed a preferential adsorption on amine (NH 2 )-terminated thiolates over methyl (CH 3 )-terminated ones. However, on the binary mixed SAM of NH 2 - and CH 3 -terminated thiols, the adsorption behavior did not follow a simple expectation based upon the electrostatic interaction. The total number of adsorbed V 2 O 5 nanowires increased with the mole fraction of NH 2 -terminated thiolates up to χ N 2 ∼ 0.5, then it decreased with further increase of χ N H2 . The height distribution of adsorbed nanowires showed that the relative portion of the agglomerated wires thicker than 3.5 nm to individual wires thinner than 3.5 nm increased up to χ N H2 ∼ 0.75 and then it decreased with further increase of χ N H2 . The dispersion of molecules with polar-functional groups as well as the molecular ordering of mixed SAMs is attributed to such adsorption behaviors of V 2 O 5 nanowires.
AB - The adsorption behaviors of V 2 O 5 nanowires on binary mixed self-assembled monolayers (SAMs) were investigated with variation of the mixing ratio of two differently terminated thiolates on Au. Hydroxyl-covered V 2 O 5 nanowires showed a preferential adsorption on amine (NH 2 )-terminated thiolates over methyl (CH 3 )-terminated ones. However, on the binary mixed SAM of NH 2 - and CH 3 -terminated thiols, the adsorption behavior did not follow a simple expectation based upon the electrostatic interaction. The total number of adsorbed V 2 O 5 nanowires increased with the mole fraction of NH 2 -terminated thiolates up to χ N 2 ∼ 0.5, then it decreased with further increase of χ N H2 . The height distribution of adsorbed nanowires showed that the relative portion of the agglomerated wires thicker than 3.5 nm to individual wires thinner than 3.5 nm increased up to χ N H2 ∼ 0.75 and then it decreased with further increase of χ N H2 . The dispersion of molecules with polar-functional groups as well as the molecular ordering of mixed SAMs is attributed to such adsorption behaviors of V 2 O 5 nanowires.
KW - Atomic force microscope
KW - Binary mixed self-assembled monolayers
KW - Selective adsorption
KW - V O nanowires
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U2 - 10.1016/j.apsusc.2006.02.050
DO - 10.1016/j.apsusc.2006.02.050
M3 - Article
AN - SCOPUS:33750802492
VL - 253
SP - 1528
EP - 1533
JO - Applied Surface Science
JF - Applied Surface Science
SN - 0169-4332
IS - 3
ER -