Distinct Chemical Contrast in Adhesion Force Images of Hydrophobic–Hydrophilic Patterned Surfaces Using Multiwalled Carbon Nanotube Probe Tips
| Autor: | Hiroaki Azehara, Hiroshi Tokumoto, Kishio Hidaka, Koichiro Ide, Yuka Kasanuma |
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| Rok vydání: | 2008 |
| Předmět: |
Nanotube
Materials science Physics and Astronomy (miscellaneous) Capillary action General Engineering General Physics and Astronomy Nanotechnology Self-assembled monolayer Carbon nanotube law.invention chemistry.chemical_compound Chemical force microscopy Silicon nitride chemistry law Microcontact printing Monolayer |
| Zdroj: | Japanese Journal of Applied Physics. 47:3594-3599 |
| ISSN: | 1347-4065 0021-4922 |
| Popis: | In this paper, we describe a fabrication procedure for large-diameter carbon nanotube probe tips (CNT tips) for atomic force microscopy, the tip-end chemistry of the CNT tips, and their advantage drawn from the study of adhesion force imaging in an ambient atmosphere on a patterned hydrophobic and hydrophilic self-assembled monolayer, which has been prepared by a microcontact printing method. Force titration measurements in phosphate buffer solutions reveal that the CNT tip has retained carboxyl groups at its end. In adhesion force imaging, a distinct chemical contrast is obtained for the patterned surfaces as compared to a case using a silicon nitride tip. The origin of the distinct contrast is discussed in terms of the tip-end chemistry featured by carboxyl groups and a possible weakening of capillary forces of water caused at around the tip–sample interface because of the intrinsically hydrophobic nature of CNTs. |
| Databáze: | OpenAIRE |
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