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Glossary Time-of-Flight Secondary Ion Mass Spectrometry

analytical technique identifying surface composition by measuring ejected ions' flight time

Time-of-Flight Secondary Ion Mass Spectrometry (ToF-SIMS) is an analytical technique used to identify the composition of surfaces at a microscopic level. It works by bombarding a sample with a focused beam of ions, causing secondary ions to be ejected from the surface. These ejected ions are then measured based on their time of flight, which allows for the determination of their mass and, consequently, the identification of the elements and molecules present on the surface. This method is highly sensitive and can provide detailed chemical information about the outermost layers of a material.

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research Mapping penetration of cosmetic compounds into hair fibers using time‐of‐flight secondary ion mass spectrometry (TOF‐SIMS)

3 citations , September 2005 in “International Journal of Cosmetic Science”

This study found that monounsaturated oils like olive oil penetrate hair fibers effectively, whereas polyunsaturated oils typically do not penetrate beyond the cuticle.

research Investigation of the damage on the outermost hair surface using ToF‐SIMS and XPS

25 citations , December 2011 in “Surface and interface analysis”

This study reports that hair damage from bleaching is associated with the oxidative cleavage of fatty acid thioester bonds, detectable by measuring the decrease in mass spectrometry peak at m / z 76.

research ToF‐SIMS characterization of the lipid layer on the hair surface. I: the damage caused by chemical treatments and UV radiation

23 citations , May 2010 in “Surface and interface analysis”

This study found that chemical treatments such as hair bleach and UV radiation significantly reduced the amount of 18-methyleicosanoic acid on the outer surface of human hair.

research Analysis of keratin films as screening tools for predicting the efficacy of potential hair dyes

7 citations , June 2019 in “Coloration Technology”

This research found that translucent keratin films absorbed more dye than opaque films, suggesting they may serve as better screening substrates for evaluating hair dye effectiveness.

research Biomimetics through bioconjugation of 16-methylheptadecanoic acid to damaged hair for hair barrier recovery

4 citations , November 2024 in “Scientific Reports”

This study found that bioconjugating 16-methylheptadecanoic acid to damaged human hair can mimic the protective function of the original 18-methyleicosanoic acid, effectively restoring both the hair's external structural integrity and its internal moisture balance.

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