A perspective on two chemometrics tools: PCA and MCR, and introduction of a new one: Pattern recognition entropy (PRE), as applied to XPS and ToF-SIMS depth profiles of organic and inorganic materials

2018 ◽  
Vol 433 ◽  
pp. 994-1017 ◽  
Author(s):  
Shiladitya Chatterjee ◽  
Bhupinder Singh ◽  
Anubhav Diwan ◽  
Zheng Rong Lee ◽  
Mark H. Engelhard ◽  
...  
Keyword(s):  
Pattern Recognition ◽  
Inorganic Materials ◽  
Depth Profiles ◽  
Tof Sims

Unsupervised Analysis of Big ToF-SIMS Data Sets: a Statistical Pattern Recognition Approach

2018 ◽  
Vol 90 (4) ◽  
pp. 2860-2866 ◽  
Author(s):  
Nunzio Tuccitto ◽  
Giacomo Capizzi ◽  
Alberto Torrisi ◽  
Antonino Licciardello
Keyword(s):  
Pattern Recognition ◽  
Statistical Pattern Recognition ◽  
Data Sets ◽  
Tof Sims ◽  
Unsupervised Analysis ◽  
Statistical Pattern ◽  
Pattern Recognition Approach

Preparation of (TiTe2)x(Sb2Te3)y(TiTe2)3(Bi2Te3)z Superlattices using the Modulated Elemental Reactants (MER) Technique

2005 ◽  
Vol 886 ◽  
Author(s):  
Clay Mortensen ◽  
Ben Matelich ◽  
Benjamin Schmid ◽  
Raimar Rostek ◽  
David C. Johnson
Keyword(s):  
Annealing Temperature ◽  
Unit Cell ◽  
Good Reproducibility ◽  
Cell Control ◽  
Depth Profiles ◽  
Modulated Elemental Reactants ◽  
Tof Sims ◽  
Elemental Reactants

AbstractDifficulty in preparing (Bi2Te3)x(Sb2Te3)y superlattices due to interdiffusion of Sb and Bi led to the study of interduffusion barriers. TiTe2 has been explored as an interdiffusion barrier to minimize the interdiffusion of Sb and Bi, as TiTe2 is not soluble in either Bi2Te3 or Sb2Te3. Preparation of (TiTe2)3(Sb2Te3)y(TiTe2)3(Bi2Te3)z superlattices has been achieved with varying x, y and z. The formation of the superlattices was studied as a function of annealing temperature and time. TOF-SIMS depth profiles were used to study the extent of interdiffusion in the samples. Unit cell control was achieved allowing for the preparation of an array of superlattices with varying periods with very good reproducibility.

ToF-SIMS depth profiles on Argon-implanted amorphous carbon. Damage effect and hydrogen characterization

2016 ◽  
Vol 48 (7) ◽  
pp. 428-431 ◽  
Author(s):  
Salvatore Grasso ◽  
Francesco Fumagalli ◽  
Marialuisa Polignano ◽  
Enrica Ravizza ◽  
Simona Spadoni ◽  
...  
Keyword(s):  
Amorphous Carbon ◽  
Damage Effect ◽  
Depth Profiles ◽  
Tof Sims

D-SIMS and ToF-SIMS quantitative depth profiles comparison on ultra thin oxynitrides

2003 ◽  
Vol 203-204 ◽  
pp. 281-284 ◽  
Author(s):  
M Bersani ◽  
D Giubertoni ◽  
M Barozzi ◽  
E EIacob ◽  
L Vanzetti ◽  
...  
Keyword(s):  
Depth Profiles ◽  
Tof Sims

scholarly journals Reconstructing accurate ToF-SIMS depth profiles for organic materials with differential sputter rates

The Analyst ◽  
2015 ◽  
Vol 140 (17) ◽  
pp. 6005-6014 ◽  
Author(s):  
Adam J. Taylor ◽  
Daniel J. Graham ◽  
David G. Castner
Keyword(s):  
Polymer Films ◽  
Organic Materials ◽  
Depth Profiles ◽  
New Methods ◽  
Tof Sims

This study describes new methods to transform and correct ToF-SIMS depth profiles of multilayer polymer films exhibiting differential sputter rates.

scholarly journals Subcellular localisation of cholesterol and phosphocholine with pattern-recognition-imaging-TOF-SIMS

2004 ◽  
Vol 18 (4) ◽  
pp. 503-511 ◽  
Author(s):  
Per Malmberg ◽  
Håkan Nygren ◽  
Peter Sjövall ◽  
Jukka Lausmaa
Keyword(s):  
Pattern Recognition ◽  
Membrane Lipids ◽  
Molecular Ions ◽  
Mass Resolution ◽  
High Mass ◽  
Subcellular Localisation ◽  
Silver Foil ◽  
Tof Sims ◽  
High Mass Resolution ◽  
Recognition Imaging

Molecular ions of cholesterol, and its fragments, and phosphocholine fragments of phospholipids, were localized in single cells with a resolution of <1μm. This is the first example of subcellular localisation of membrane lipids with pattern-recognition, imaging time-of-flight secondary ion mass spectrometry (PRITS) here utilized for identification and subcellular localisation of cholesterol and phosphocholine in PMN leukocytes. Cell imprints were produced by transferring the cell constituents of freeze-dried cells to a silver foil, and the silver surface was analyzed by TOF-SIMS. TOF-SIMS spectra were recorded by scanning the primary ion beam over the analysis area and acquiring a positive mass spectrum of the ions leaving the surface. Data were collected at either high mass resolutionm/Δm >7000 or high lateral resolution. High mass resolution spectra were recorded on reference samples of pure cholesterol and phosphatidylcholine. Characteristic fragment peaks and the silver cationised quasimolecular ion [M+Ag]+were selected as a pattern for the identification of the lipids in TOF-SIMS images of surface-adhering leukocytes. The localisation of membrane lipids showed lateral heterogeneity over the cell surface.

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