Effect of Humidity and Hydrophobicity on the Tribological Properties of Self-Assembled Monolayers
The tribological properties of two distinctive alkanethiol SAMs, 16-mercaptohexadecanoic acid (MHA) and 1-octadecanethiol (ODT), on gold substrates in various humidity conditions were examined by lateral force microscopy (LFM). The results suggest that hydrophobic ODT SAM is insensitive to humidity....
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| Format: | Article |
| Language: | English |
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Wiley
2013-01-01
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| Series: | The Scientific World Journal |
| Online Access: | http://dx.doi.org/10.1155/2013/748295 |
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| author | Yen-Chih Liao William Hargrove Brandon L. Weeks |
| author_facet | Yen-Chih Liao William Hargrove Brandon L. Weeks |
| author_sort | Yen-Chih Liao |
| collection | DOAJ |
| description | The tribological properties of two distinctive alkanethiol SAMs, 16-mercaptohexadecanoic acid (MHA) and 1-octadecanethiol (ODT), on gold substrates in various humidity conditions were examined by lateral force microscopy (LFM). The results suggest that hydrophobic ODT SAM is insensitive to humidity. The difference of lateral force signal is within ±10% regardless of humidity. The lateral force signal of hydrophilic MHA SAMs has a significant decrease in signal in humid environments. The influence of bulk water was also investigated by LFM. By imaging under water, the capillary force is eliminated on ODT SAMs, which leads to a lower lateral force. However, the lateral force image was reversed on MHA SAMs, which suggested that hydrophobic forces dominated in water. |
| format | Article |
| id | doaj-art-6402629f2d024bcdb808b14f7610017d |
| institution | Kabale University |
| issn | 1537-744X |
| language | English |
| publishDate | 2013-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | The Scientific World Journal |
| spelling | doaj-art-6402629f2d024bcdb808b14f7610017d2025-02-03T06:14:09ZengWileyThe Scientific World Journal1537-744X2013-01-01201310.1155/2013/748295748295Effect of Humidity and Hydrophobicity on the Tribological Properties of Self-Assembled MonolayersYen-Chih Liao0William Hargrove1Brandon L. Weeks2Department of Chemical Engineering, Texas Tech University, 6th Street, Canton, Lubbock, TX 79409, USADepartment of Chemical Engineering, Texas Tech University, 6th Street, Canton, Lubbock, TX 79409, USADepartment of Chemical Engineering, Texas Tech University, 6th Street, Canton, Lubbock, TX 79409, USAThe tribological properties of two distinctive alkanethiol SAMs, 16-mercaptohexadecanoic acid (MHA) and 1-octadecanethiol (ODT), on gold substrates in various humidity conditions were examined by lateral force microscopy (LFM). The results suggest that hydrophobic ODT SAM is insensitive to humidity. The difference of lateral force signal is within ±10% regardless of humidity. The lateral force signal of hydrophilic MHA SAMs has a significant decrease in signal in humid environments. The influence of bulk water was also investigated by LFM. By imaging under water, the capillary force is eliminated on ODT SAMs, which leads to a lower lateral force. However, the lateral force image was reversed on MHA SAMs, which suggested that hydrophobic forces dominated in water.http://dx.doi.org/10.1155/2013/748295 |
| spellingShingle | Yen-Chih Liao William Hargrove Brandon L. Weeks Effect of Humidity and Hydrophobicity on the Tribological Properties of Self-Assembled Monolayers The Scientific World Journal |
| title | Effect of Humidity and Hydrophobicity on the Tribological Properties of Self-Assembled Monolayers |
| title_full | Effect of Humidity and Hydrophobicity on the Tribological Properties of Self-Assembled Monolayers |
| title_fullStr | Effect of Humidity and Hydrophobicity on the Tribological Properties of Self-Assembled Monolayers |
| title_full_unstemmed | Effect of Humidity and Hydrophobicity on the Tribological Properties of Self-Assembled Monolayers |
| title_short | Effect of Humidity and Hydrophobicity on the Tribological Properties of Self-Assembled Monolayers |
| title_sort | effect of humidity and hydrophobicity on the tribological properties of self assembled monolayers |
| url | http://dx.doi.org/10.1155/2013/748295 |
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