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.
Full text is not hosted in this archive but may be available via the Official URL, or by requesting a copy from the corresponding author.
Official URL: http://www.springerlink.com/content/j2762265702856...
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.
|Subjects:||Physical Science > Nanophysics|
Material Science > Nanofabrication processes and tools
|Divisions:||Faculty of Engineering, Science and Mathematics > School of Physics|
|Deposited On:||30 May 2011 13:13|
|Last Modified:||30 May 2011 13:13|
Repository Staff Only: item control page