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Study of the helium cross section of unsymmetric disulfide self assembled monolayers on Au 111     
Yazarlar (4)
Dr. Öğr. Üyesi Erol ALBAYRAK 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
Devamını Göster
Özet
We have investigated the formation of self-assembled monolayers (SAMs) of 11-hydroxyundecyl decyl disulfide (CH 3 -(CH 2 ) 9 -S-S-(CH 2 ) 11 -OH, HDD) and 11-hydroxyundecyl octadecyl disulfide (CH 3 -(CH 2 ) 17 -S-S-(CH 2 ) 11 -OH, HOD) produced by supersonic molecular beam deposition (SMBD). The study has been carried out by means of helium diffraction at very low film coverage. In this regime helium single molecule cross sections have been estimated in a temperature range between 100 K and 450 K. The results show a different behavior above 300 K that has been interpreted as the starting of mobility with the formation of two thiolate moieties either linked by a gold adatom or distant enough to prevent cross section overlapping. Finally, helium diffraction patterns measured at 80 K for the SAMs grown at 200 K are discussed and the results support the proposed hypothesis of molecular dissociation based on the cross section data.
Anahtar Kelimeler
11-Hydroxyundecyl decyl disulfide | 11-Hydroxyundecyl octadecyl disulfide | Self-assembled monolayers | Supersonic molecular beam deposition | The scattering cross sections | Unsymmetric disulfides
Makale Türü Özgün Makale
Makale Alt Türü SSCI, AHCI, SCI, SCI-Exp dergilerinde yayımlanan tam makale
Dergi Adı Applied Surface Science
Dergi ISSN 0169-4332 Wos Dergi Scopus Dergi
Dergi Tarandığı Indeksler SCI-Expanded
Dergi Grubu Q1
Makale Dili İngilizce
Basım Tarihi 12-2016
Cilt No 390
Sayı 1
Sayfalar 283 / 288
Doi Numarası 10.1016/j.apsusc.2016.08.062
Makale Linki http://linkinghub.elsevier.com/retrieve/pii/S0169433216317044