| Yazarlar (4) |
Dr. Öğr. Üyesi Erol ALBAYRAK
Ahi Evran Üniversitesi, Türkiye |
|
Şemistan Karabuğa
Kahramanmaraş Sütçü İmam Üniversitesi, Türkiye |
|
Gianangelo Bracco
|
|
Mehmet Fatih Danışman
Orta Doğu Teknik Üniversitesi, Türkiye |
| Özet |
| Self-assembled monolayers (SAMs) of unsymmetric disulfides on Au(111) are used to form mixed SAMs that can be utilized in many applications. Here, we have studied 11-hydroxyundecyl decyl disulfide (CH3-(CH2)9-S-S-(CH2)11-OH, HDD) SAMs produced by supersonic molecular beam deposition and characterized by He diffraction. The film growth was monitored at different temperatures up to a coverage which corresponds to a full lying down phase and the diffraction analysis shows that below 250 K the phase is different from the phase measured above 300 K. During the annealing of the film, two phase transitions were observed, at 250 K and 350 K. The overall data suggest that the former is related to an irreversible phase separation of HDD above 250 K to decanethiolate (-S-(CH2)9-CH3, DTT) and hydroxyundecylthiolate (-S-(CH2)11-OH, MUDT), while the latter to a reversible melting of the film. Above 450 K, the specular intensity shows an increase related to film desorption and different chemisorbed states were observed with energies in the same range as observed for decanethiol (H-S-(CH2)9-CH3, DT) and mercaptoundecanol (H-S-(CH2)11-OH, MUD) SAMs. |
| Anahtar Kelimeler |
| Makale Türü | Özgün Makale |
| Makale Alt Türü | SSCI, AHCI, SCI, SCI-Exp dergilerinde yayımlanan tam makale |
| Dergi Adı | The Journal of Chemical Physics |
| Dergi ISSN | 0021-9606 |
| Dergi Tarandığı Indeksler | SCI-Expanded |
| Dergi Grubu | Q4 |
| Makale Dili | İngilizce |
| Basım Tarihi | 01-2015 |
| Cilt No | 142 |
| Sayı | 1 |
| Sayfalar | 14703 / 0 |
| Doi Numarası | 10.1063/1.4903539 |
| Makale Linki | http://scitation.aip.org/content/aip/journal/jcp/142/1/10.1063/1.4903539 |
| Atıf Sayıları | |
| SCOPUS | 5 |
| Google Scholar | 11 |
