Journal ArticleDOI
Primary and secondary oxygen-induced C1s binding energy shifts in X-ray photoelectron spectroscopy of polymers
David Briggs,Graham. Beamson +1 more
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TLDR
In this article, a total of 43 polymers containing only C, H, and O have been studied using an X-ray photoelectron spectroscopy instrument capable of the highest energy resolution avallable to date.Abstract:
A total of 43 polymers containing only C, H, and O have been studied using an X-ray photoelectron spectroscopy instrument capable of the highest energy resolution avallable to date. The primary alm was to reinvestigate the C1s binding energy shifts for oxygen functionalltles and to systematically investigate secondary (β) shifts for the first time. In addition, this large data set has revealed the effects of vibrational fine structure on C1s component line width/shape and the effects of shake-up/shake-off (in photoemission from C=O groups) on nonstoichoimetry of C1s component intensitiesread more
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Graphene: Corrosion-Inhibiting Coating
TL;DR: Graphene is established as the thinnest known corrosion-protecting coating because it suppresses metal oxidation and oxygen reduction and prevents corrosion of underlying metals.
Journal ArticleDOI
Controllable Surface Modification of Poly(lactic-co-glycolic acid) (PLGA) by Hydrolysis or Aminolysis I: Physical, Chemical, and Theoretical Aspects
TL;DR: Two wet-chemical methods are described to introduce useful levels of carboxylic acid or primary and secondary amine groups, respectively, onto the surface of PLGA with minimal degradation and it is shown that these carboxyl and amines are readily activated to allow the covalent attachment of biological macromolecules.
Journal ArticleDOI
XPS Studies of Fluorinated Acrylate Polymers and Block Copolymers with Polystyrene
Camille M. Kassis,Jack K. Steehler,Douglas E. Betts,Zhibin Guan,Timothy J. Romack,Joseph M. DeSimone,Richard W. Linton +6 more
TL;DR: X-ray photoelectron spectroscopy (XPS) has been used to investigate the surface characteristics of various fluorinated acrylate homopolymers [1, 1-dihydroperfluorooctyl acrylated (PFOA), 1, 1 -di... as mentioned in this paper.
Journal ArticleDOI
Strong resistance of citrate anions on metal nanoparticles to desorption under thiol functionalization
TL;DR: A detailed citrate/thiolate coadsorption model is presented that describes this final mixed surface composition of AuNPs, and shows hydrogen bonding between carboxyl moieties primarily is attributed to the strong adsorption of citrate, leading to the formation of a stabilized network that is challenging to displace.
Journal ArticleDOI
Charging of ionic liquid surfaces under X-ray irradiation: the measurement of absolute binding energies by XPS
Ignacio J. Villar-Garcia,Emily F. Smith,Alasdair W. Taylor,Fulian Qiu,Kevin R. J. Lovelock,Robert G. Jones,Peter Licence +6 more
TL;DR: The nature and extent of surface charging in ionic liquids is demonstrated and the use of long alkyl chains and the imidazolium nitrogen, both of which are part of the ionic liquid chemical structure, as internal references for charge correction are investigated.
References
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Journal ArticleDOI
A new ESCA instrument with improved surface sensitivity, fast imaging properties and excellent energy resolution
Ulrik Gelius,Björn Wannberg,P. Baltzer,H. Fellner-Feldegg,G. Carlsson,C.-G. Johansson,J. Larsson,P. Münger,G. Vegerfors +8 more
TL;DR: In this paper, the first experiments with a new ESCA instrument with monochromatic X-ray excitation were presented, and the measurements were selected to assess the performance of the instrument in terms of energy and spatial resolution, information rate and surface sensitivity.
Journal ArticleDOI
Analysis of polymer surfaces by SIMS 1. An investigation of practical problems
D. Briggs,A. B. Wootton +1 more
TL;DR: In this article, the potential for high spatial resolution surface analysis of polymers via fingerprint mass spectra and the use of a focused ion beam was investigated using short chain hydrocarbon and films of polystyrene and polytetrafluoroethylene.
Journal ArticleDOI
Applications of ESCA to polymer chemistry. III. Structures and bonding in homopolymers of ethylene and the fluoroethylenes and determination of the compositions of fluoro copolymers
TL;DR: In this article, the core binding energies of the homopolymers of ethylene and fluoroethylenes were measured using ESCA and interpreted in terms of semi-empirical all-valence electron SCF MO calculations in the CNDO/2 formalism in conjunction with the charge potential model.
Journal ArticleDOI
Performance and application of the scienta ESCA300 spectrometer
Graham Beamson,David Briggs,S. F. Davies,Ian W. Fletcher,D. T. Clark,J. Howard,Ulrik Gelius,B. Wannberg,P. Balzer +8 more
TL;DR: The Scienta ESCA300 as mentioned in this paper is a state-of-the-art x-ray photoelectron spectrometer with high intensity, and high energy and spatial resolution, made possible by the use of a high-power rotating anode xray source with monochromatization, high transmission and imaging electron optics and multichannel detector.
Journal ArticleDOI
Observation of vibrational asymmetry in the high resolution monochromatized XPS of hydrocarbon polymers
TL;DR: In this paper, high resolution C1s spectra were reported for polyethylene, polypropylene, hexatriacontane (n-C36H74), and polystyrene.
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High Resolution XPS of Organic Polymers: The Scienta ESCA300 Database
G. Beamson,David Briggs +1 more