AFM-assisted fabrication of thiol SAM pattern with alternating quantified surface potential
<p>Abstract</p> <p>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 microsc...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2011-01-01
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| Series: | Nanoscale Research Letters |
| Online Access: | http://www.nanoscalereslett.com/content/6/1/185 |
| _version_ | 1827848673217740800 |
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| author | Simons Janet Xu Song Moores Bradley Leonenko Zoya |
| author_facet | Simons Janet Xu Song Moores Bradley Leonenko Zoya |
| author_sort | Simons Janet |
| collection | DOAJ |
| description | <p>Abstract</p> <p>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.</p> |
| first_indexed | 2024-03-12T09:51:18Z |
| format | Article |
| id | doaj.art-6ea47939709c485ba5bba9cceba4886c |
| institution | Directory Open Access Journal |
| issn | 1931-7573 1556-276X |
| language | English |
| last_indexed | 2024-03-12T09:51:18Z |
| publishDate | 2011-01-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Nanoscale Research Letters |
| spelling | doaj.art-6ea47939709c485ba5bba9cceba4886c2023-09-02T12:29:04ZengSpringerOpenNanoscale Research Letters1931-75731556-276X2011-01-0161185AFM-assisted fabrication of thiol SAM pattern with alternating quantified surface potentialSimons JanetXu SongMoores BradleyLeonenko Zoya<p>Abstract</p> <p>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.</p>http://www.nanoscalereslett.com/content/6/1/185 |
| spellingShingle | Simons Janet Xu Song Moores Bradley Leonenko Zoya AFM-assisted fabrication of thiol SAM pattern with alternating quantified surface potential Nanoscale Research Letters |
| title | AFM-assisted fabrication of thiol SAM pattern with alternating quantified surface potential |
| title_full | AFM-assisted fabrication of thiol SAM pattern with alternating quantified surface potential |
| title_fullStr | AFM-assisted fabrication of thiol SAM pattern with alternating quantified surface potential |
| title_full_unstemmed | AFM-assisted fabrication of thiol SAM pattern with alternating quantified surface potential |
| title_short | AFM-assisted fabrication of thiol SAM pattern with alternating quantified surface potential |
| title_sort | afm assisted fabrication of thiol sam pattern with alternating quantified surface potential |
| url | http://www.nanoscalereslett.com/content/6/1/185 |
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