Non-fluorinated Self-assembled Monolayer Films?
نویسنده
چکیده
We report here the spectra that result when singly and doubly charged buckminsterfullerene ions, C& and C g , collide with self-assembled monolayer films at collison energies ranging from 125 to 320 eV. The surfaces were prepared by the spontaneous assembly of octadecanethiol (CH3(CHz),7SH), perdeuteroeicosanethiol (CD,(CDz),$H), and 2-(perfluorooctyl)-ethanethiol (CF3(CFd7CH2CHZSH) on vapor-deposited gold. The fluorinated surface causes the greatest conversion of kinetic energy into internal energy; more extensive fragmentation of doubly charged buckminsterfullerene C g is detected in collisions with this surface than in collisions with the alkanethiolate surfaces.
منابع مشابه
Surface-induced fragmentation of higher fullerenes and endohedral metallofullerenes
We report the first results of surface collisions of pure hollow fullerenes ~C60, C70 and C78! and endohedral metallofullerenes ~Y@C82, Ca@C82 and Ca@C84!, isolated by liquid chromatography, against solid ~silicon and gold! surfaces and self-assembled monolayer ~SAM! films. The experiments have been performed by a reflectron type time-of-flight mass spectrometer modified for measuring surface-i...
متن کاملProbes for the Characterization of Self-assembled Monolayer Films on Gold
Low-energy collisions of ionized acetone-d, , DMSO-d, and pyridine-d, with alkanethiolate self-assembled monolayer (SAM) surfaces prepared on gold were investigated. These experiments can be used to monitor routinely the condition of the surfaces and to determine whether a surface is acceptable for a given application. In addition to the surface-induced dissociation of the molecular ions, inten...
متن کاملFluorinated self-assembled monolayers: composition, structure and interfacial properties
Over the past several years, various fluorinated self-assembled monolayers (F-SAMs) on gold have been used to study the interfacial properties of fluorocarbon interfaces. This review focuses on the structures of selected F-SAMs and describes how the structures relate to various interfacial properties, such as wettability, friction, X-ray induced damage and ion-surface collisions. 2003 Elsevier ...
متن کاملInverted Surface Dipoles in Fluorinated Self-Assembled Monolayers
The presence of surface dipoles in selfassembled monolayers (SAMs) gives rise to profound effects on the interfacial properties of the films. For example, CF3terminated alkanethiolate films are surprisingly more wettable toward polar contacting liquids than analogous hydrocarbon SAMs due to the fluorocarbon-to-hydrocarbon transition (CF3−CH2) at the interface (i.e., the presence of a strong “FC...
متن کاملSelf-assembled monolayers derived from a double-chained monothiol having chemically dissimilar chains.
The structure and conformation of self-assembled monolayers (SAMs) derived from the adsorption of a specifically designed double-chained partially fluorinated thiol having the formula 12,12,13,13,14,14,15,15,16,16,17,17,18,18,19,19,19-heptadecafluoro-2-tetradecylnona-decane-1-thiol (2) onto the surface of evaporated gold were examined by ellipsometry, contact angle goniometry, polarization modu...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2004