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Formation of highly ordered self-assembled monolayers of alkynes on Au(111) substrate
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Formation of highly ordered self-assembled monolayers of alkynes on Au(111) substrate
Bibliographic description
| title: | Formation of highly ordered self-assembled monolayers of alkynes on Au(111) substrate |
| author: | Żaba Tomasz  , Noworolska Agnieszka, Bowers Carleen Morris, Breiten Benjamin, Whitesides George M., Cyganik Piotr
|
| journal title: | Journal of the American Chemical Society |
| volume: | 136 |
| issue: | 34 |
| date of publication : | 2014 |
| pages: | 11918-11921 |
| ISSN: |
0002-7863 |
| eISSN: |
1520-5126 1943-2984 |
| DOI: | |
| language: | English |
| journal language: | English |
| abstract in English: | Self-assembled monolayers (SAMs), prepared by reaction of terminal n-alkynes (HC≡C(CH2)nCH3, n = 5, 7, 9, and 11) with Au(111) at 60 °C were characterized using scanning tunneling microscopy (STM), infrared reflection absorption spectroscopy (IRRAS), X-ray photoelectron spectroscopy (XPS), and contact angles of water. In contrast to previous spectroscopic studies of this type of SAMs, these combined microscopic and spectroscopic experiments confirm formation of highly ordered SAMs having packing densities and molecular chain orientations very similar to those of alkanethiolates on Au(111). Physical properties, hydrophobicity, high surface order, and packing density, also suggest that SAMs of alkynes are similar to SAMs of alkanethiols. The formation of high-quality SAMs from alkynes requires careful preparation and manipulation of reactants in an oxygen-free environment; trace quantities of O2 lead to oxidized contaminants and disordered surface films. The oxidation process occurs during formation of the SAM by oxidation of the −C≡C– group (most likely catalyzed by the gold substrate in the presence of O2). |
| affiliation: | Wydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut Fizyki im. Mariana Smoluchowskiego |
| type: | journal article |
| subtype: | academic paper |
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Projekt „Repozytorium otwartego dostępu do dorobku naukowego i dydaktycznego UJ” współfinansowany w ramach poddziałania 2.3.1 „Cyfrowe udostępnianie zasobów nauki” Programu Operacyjnego Polska Cyfrowa z Europejskiego Funduszu Rozwoju Regionalnego i budżetu państwa na podstawie umowy o dofinansowanie nr POPC.02.03.01-00-0030/17-00
