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Molecular-scale surface structures of oligo(ethylene glycol)-terminated self-assembled monolayers investigated by frequency modulation atomic force microscopy in aqueous solution.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Inada, Natsumi Asakawa, Harutoshi Matsumoto, Yoichiro Fukuma, Takeshi |
| Copyright Year | 2014 |
| Abstract | The structure and protein resistance of oligo(ethylene glycol)-terminated self-assembled monolayers (OEG-SAMs) have been studied intensively using various techniques. However, their molecular-scale surface structures have not been well understood. In this study, we performed molecular-resolution imaging of OH-terminated SAMs (OH-SAMs) and hexa(ethylene glycol) SAMs (EG(6)OH-SAMs) formed on a Au(111) surface in an aqueous solution by frequency modulation atomic force microscopy (FM-AFM). The results show that most of the ethylene glycol (EG) chains in an EG(6)OH-SAM are closely packed and well-ordered to present a molecularly flat surface even in an aqueous solution. In addition, we found that EG(6)OH-SAMs have nanoscale defects, where molecules take a disordered arrangement with their molecular axes parallel to the substrate surface. We also found that the domain size (50-200 nm) of an EG(6)OH-SAM is much larger than that of OH-SAMs (10-40 nm). These findings should significantly advance molecular-scale understanding about the surface structure of OEG-SAMs. |
| Starting Page | 305602 |
| Ending Page | 305602 |
| Page Count | 1 |
| File Format | PDF HTM / HTML |
| DOI | 10.1088/0957-4484/25/30/305602 |
| PubMed reference number | 25008429 |
| Journal | Medline |
| Volume Number | 25 |
| Issue Number | 30 |
| Alternate Webpage(s) | https://kanazawa-u.repo.nii.ac.jp/?action=repository_action_common_download&attribute_id=26&file_no=1&item_id=9051&item_no=1 |
| Alternate Webpage(s) | http://dspace.lib.kanazawa-u.ac.jp/dspace/bitstream/2297/39693/1/TE-PR-FUKUMA-T-305602.pdf |
| Alternate Webpage(s) | https://doi.org/10.1088/0957-4484%2F25%2F30%2F305602 |
| Journal | Nanotechnology |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
