Characterization of additives at polymer surfaces by ToF-SIMS

2002 ◽  
Vol 34 (1) ◽  
pp. 565-569 ◽  
Author(s):  
N. Médard ◽  
C. Poleunis ◽  
X. Vanden Eynde ◽  
P. Bertrand
Keyword(s):  
Polymer Surfaces ◽  
Tof Sims

Applications of Time-OF-Flight Secondary Ion Mass Spectrometry (TOF-SIMS)

1990 ◽  
Vol 48 (2) ◽  
pp. 308-309
Author(s):  
Bruno Schueler ◽  
Robert W. Odom
Keyword(s):  
Mass Spectrometry ◽  
Secondary Ion Mass Spectrometry ◽  
Structural Information ◽  
Time Of Flight ◽  
Biological Tissues ◽  
Polymer Surfaces ◽  
Tof Sims ◽  
Secondary Ions ◽  
Ion Mass Spectrometry ◽  
Secondary Ion

Time-of-flight secondary ion mass spectrometry (TOF-SIMS) provides unique capabilities for elemental and molecular compositional analysis of a wide variety of surfaces. This relatively new technique is finding increasing applications in analyses concerned with determining the chemical composition of various polymer surfaces, identifying the composition of organic and inorganic residues on surfaces and the localization of molecular or structurally significant secondary ions signals from biological tissues. TOF-SIMS analyses are typically performed under low primary ion dose (static SIMS) conditions and hence the secondary ions formed often contain significant structural information.This paper will present an overview of current TOF-SIMS instrumentation with particular emphasis on the stigmatic imaging ion microscope developed in the authors’ laboratory. This discussion will be followed by a presentation of several useful applications of the technique for the characterization of polymer surfaces and biological tissues specimens. Particular attention in these applications will focus on how the analytical problem impacts the performance requirements of the mass spectrometer and vice-versa.

scholarly journals Chemical Evaluation of Eumelanin Maturation by ToF-SIMS and Alkaline Peroxide Oxidation HPLC Analysis

2020 ◽  
Vol 22 (1) ◽  
pp. 161
Author(s):  
Martin Jarenmark ◽  
Peter Sjövall ◽  
Shosuke Ito ◽  
Kazumasa Wakamatsu ◽  
Johan Lindgren
Keyword(s):  
Molecular Structure ◽  
Secondary Ion Mass Spectrometry ◽  
Chemical Characterization ◽  
Experimental Treatment ◽  
Negative Ion ◽  
Pressure Treatment ◽  
Peroxide Oxidation ◽  
Specific Chemical ◽  
Tof Sims

Residual melanins have been detected in multimillion-year-old animal body fossils; however, confident identification and characterization of these natural pigments remain challenging due to loss of chemical signatures during diagenesis. Here, we simulate this post-burial process through artificial maturation experiments using three synthetic and one natural eumelanin exposed to mild (100 °C/100 bar) and harsh (250 °C/200 bar) environmental conditions, followed by chemical analysis employing alkaline hydrogen peroxide oxidation (AHPO) and time-of-flight secondary ion mass spectrometry (ToF-SIMS). Our results show that AHPO is sensitive to changes in the melanin molecular structure already during mild heat and pressure treatment (resulting, e.g., in increased C-C cross-linking), whereas harsh maturation leads to extensive loss of eumelanin-specific chemical markers. In contrast, negative-ion ToF-SIMS spectra are considerably less affected by mild maturation conditions, and eumelanin-specific features remain even after harsh treatment. Detailed analysis of ToF-SIMS spectra acquired prior to experimental treatment revealed significant differences between the investigated eumelanins. However, systematic spectral changes upon maturation reduced these dissimilarities, indicating that intense heat and pressure treatment leads to the formation of a common, partially degraded, eumelanin molecular structure. Our findings elucidate the complementary nature of AHPO and ToF-SIMS during chemical characterization of eumelanin traces in fossilized organismal remains.

4A combined XPS/ToF-SIMS approach for the 3D compositional characterization of Zr-based conversion of galvanized steel

2021 ◽  
pp. 150166
Author(s):  
Vanina Cristaudo ◽  
Kitty Baert ◽  
Priya Laha ◽  
Mary Lyn Lim ◽  
Elizabeth Brown-Tseng ◽  
...  
Keyword(s):  
Galvanized Steel ◽  
Tof Sims ◽  
Compositional Characterization

Characterization of cell cultures with ToF-SIMS and laser-SNMS

2002 ◽  
Vol 34 (1) ◽  
pp. 63-66 ◽  
Author(s):  
M. Fartmann ◽  
S. Dambach ◽  
C. Kriegeskotte ◽  
H. P. Wiesmann ◽  
A. Wittig ◽  
...  
Keyword(s):  
Cell Cultures ◽  
Tof Sims

Characterization of a range of alkyl-bonded silica HPLC stationary phases: XPS and ToF-SIMS studies

1994 ◽  
Vol 21 (5) ◽  
pp. 263-273 ◽  
Author(s):  
V. A. Brown ◽  
D. A. Barrett ◽  
P. N. Shaw ◽  
M. C. Davies ◽  
H. J. Ritchie ◽  
...  
Keyword(s):  
Stationary Phases ◽  
Tof Sims

scholarly journals Surface Characterization of Polymer Blends by XPS and ToF-SIMS

Materials ◽  
2016 ◽  
Vol 9 (8) ◽  
pp. 655 ◽  
Author(s):  
Chi Chan ◽  
Lu-Tao Weng
Keyword(s):  
Polymer Blends ◽  
Surface Characterization ◽  
Tof Sims
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