Moores, Bradley and Simons, Janet and Xu, Song and Leonenko, Zoya (2011) AFM-assisted fabrication of thiol SAM pattern with alternating quantified surface potential. Nanoscale Research Letters, 6 (1). pp. 1-5.
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Official URL: http://www.springerlink.com/content/j2762265702856...
Abstract
Thiol self-assembled monolayers (SAMs) are widely used in many nano- and bio-technology applications. We report a new approach to create and characterize a thiol SAMs micropattern with alternating charges on a flat gold-coated substrate using atomic force microscopy (AFM) and Kelvin probe force microscopy (KPFM). We produced SAMs-patterns made of alternating positively charged, negatively charged, and hydrophobic-terminated thiols by an automated AFM-assisted manipulation, or nanografting. We show that these thiol patterns possess only small topographical differences as revealed by AFM, and distinguished differences in surface potential (20-50 mV), revealed by KPFM. The pattern can be helpful in the development of biosensor technologies, specifically for selective binding of biomolecules based on charge and hydrophobicity, and serve as a model for creating surfaces with quantified alternating surface potential distribution.
| Item Type: | Article |
|---|---|
| Subjects: | Physical Science > Nanophysics Material Science > Nanofabrication processes and tools |
| Divisions: | Faculty of Engineering, Science and Mathematics > School of Physics |
| ID Code: | 10960 |
| Deposited By: | JNCASR |
| Deposited On: | 30 May 2011 13:13 |
| Last Modified: | 30 May 2011 13:13 |
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