A novel AFM based method for force measurements between individual hair strands

Max, Eva; Hafner, Wolfgang; Bartels, Frank Wilco; Sugiharto, Albert B.; Wood, Claudia; Fery, Andreas

doi:10.1016/j.ultramic.2010.01.003

Cited by 21 publications

(17 citation statements)

References 12 publications

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“…As also noticed by the authors, their data may not be representative for all hairs and hair parts. Force-distance and friction measurements between individual hair strands have been documented by Max et al for direct quantification of hair-hair (other types of fiber) interactions in the range of 10-100 mm diameter (AFM Atomic Force F&E, MFP-3D; spring constant 1.2-8.5 N/m) [62]. DelRio and Cook have also provided interesting data of hair samples (untreated virgin hairs and conditioned and bleached hairs) [18].…”

Section: Hairmentioning

confidence: 99%

“…Yet there is little forensically mediated research on this subject. Investigations in this area have mainly focused on age determination of bloodstains [58][59][60][61] and to a lesser extent on hair [19,20,23,62,63], gunshot and explosive residues, [64] and pressure sensitive adhesives [65][66][67]. Based on key articles from the field, the application of FS in forensic hair, gunshot and explosive residue and pressure sensitive adhesives examinations will be discussed followed by more extensive attention to age determination of bloodstains.…”

Section: Forensic Potential Of Force Spectroscopymentioning

confidence: 99%

See 1 more Smart Citation

Forensic Potential of Atomic Force Microscopy with Special Focus on Age Determination of Bloodstains

Smijs¹,

Hosseinzoi²,

Galli³

2019

Atomic-Force Microscopy and Its Applications

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An important aspect of any crime scene investigation is to detect, secure and analyze trace evidence. In forensic examinations where topographic characterization is important like in fingermark, textile and document forgery examinations, the atomic force microscopy (AFM) imaging technique can be of value. However, it is the force spectroscopy that could make AFM a versatile tool in crime investigations. Particularly, the ability to measure changes in mechanical properties of forensic trace material over time makes this technology in potential interesting for forensic examinations. The usefulness of force measurements to evaluate the elasticity of red blood cells (RBCs) in relation to the age of a bloodstain is an interesting example. With minimally invasive AFM technology, timedependent alterations in the viscoelasticity of RBCs that occur during the aging of bloodstains can be featured. A discrimination between traces left by the perpetrator and other persons that have been present at the crime scene will thus be enabled. A recently obtained proof-of-concept demonstrating the usefulness of AFM for age estimation of bloodstains will be described. Additionally, the usefulness of AFM imaging and force spectroscopy for human hair, document forgery, textile fiber, fingermark and gunshot and explosive residue examinations will be discussed.

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Section: Hairmentioning

confidence: 99%

Section: Forensic Potential Of Force Spectroscopymentioning

confidence: 99%

Forensic Potential of Atomic Force Microscopy with Special Focus on Age Determination of Bloodstains

Smijs¹,

Hosseinzoi²,

Galli³

2019

Atomic-Force Microscopy and Its Applications

View full text Add to dashboard Cite

show abstract

“…Tribological properties of hair surfaces have been studied for many years, and several measuring methods have been developed (Aita and Nonomura, 2016; Bhushan et al, 2005; Breakspear et al, 2005; Chevalier, 2017; LaTorre and Bhushan, 2005; Max et al, 2010; Mizuno et al, 2013; Robbins, 2012; Sinclair, 2007; Tanamachi et al, 2010). Some of them measure friction between hair and other materials (plates (Bhushan et al, 2005), force probes (Aita and Nonomura, 2016), and atomic force microscope (AFM) tip (Bhushan et al, 2005; LaTorre and Bhushan, 2005)), which are not suitable for our purpose.…”

Section: Introductionmentioning

confidence: 99%

Tribological Properties between Taut Hair Fibers in Wet Conditions: A New Shampoo Formulation for Eliminating Stick‐Slip Friction

Miyamoto

Yamazaki

Tomotsuka

et al. 2021

J Surfact & Detergents

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The tribological properties between taut hair fibers in wet conditions were investigated to evaluate the tangling/detangling performance of shampoo formulations during washing (particularly rinsing). A new setup for friction measurements between taut hair fibers was established. Using the setup, tribological properties of hair fibers treated with two shampoo formulations, whose tangling performances were different, were investigated. The base formulation for the shampoos was the same; the only difference was the type of amino-modified silicones used as conditioning agents. Shampoo (Sp) A (poor detangling performance) incudes water-insoluble silicone, and Sp B (excellent detangling performance) includes water-soluble silicone. The tribological behaviors between taut hair fibers treated with the diluted solutions of the Sp were very different; the Sp A-treated hair exhibited stick-slip sliding, whereas the Sp B-treated hair exhibited smooth sliding. This difference presumably comes from the different coacervation behaviors in the diluted solutions and resulting structure of conditioning film formed on hair surfaces. The smooth sliding (ideal for detangling) of Sp B-treated hair comes from the two-layer structure of the conditioning film on hair; positively charged amino-modified silicone dissolved in water adsorbed immediately on negatively charged hair surface, followed by the physical adsorption of coacervates on the adsorbed silicone layer. The outer coacervate layer is easily removed during sliding, and smooth sliding comes from the low friction of the silicone layer. The relationship between the type of amino-modified silicones, conditioning film formation on the surface, and tribological properties was discussed, which gives insights into designing Sp formulations with excellent detangling performance.

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“…Controlling adhesive interaction under water is also very important in technology, e.g., mussel adhesion on surfaces of ships as well as for cleaning processes or controlling the haptic sensation of surfaces [1,2]. On the molecular level, adhesion phenomena are typically indirectly studied using methods like quartz crystal microbalance, surface plasmon resonance or fluorescence microscopy [3,4].…”

Section: Introductionmentioning

confidence: 99%

Hydrogel Microparticles as Sensors for Specific Adhesion: Case Studies on Antibody Detection and Soil Release Polymers

Strzelczyk

Wang

Lindhorst

et al. 2017

Gels

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Adhesive processes in aqueous media play a crucial role in nature and are important for many technological processes. However, direct quantification of adhesion still requires expensive instrumentation while their sample throughput is rather small. Here we present a fast, and easily applicable method on quantifying adhesion energy in water based on interferometric measurement of polymer microgel contact areas with functionalized glass slides and evaluation via the Johnson-Kendall-Roberts (JKR) model. The advantage of the method is that the microgel matrix can be easily adapted to reconstruct various biological or technological adhesion processes. Here we study the suitability of the new adhesion method with two relevant examples: (1) antibody detection and (2) soil release polymers. The measurement of adhesion energy provides direct insights on the presence of antibodies showing that the method can be generally used for biomolecule detection. As a relevant example of adhesion in technology, the antiadhesive properties of soil release polymers used in today's laundry products are investigated. Here the measurement of adhesion energy provides direct insights into the relation between polymer composition and soil release activity. Overall, the work shows that polymer hydrogel particles can be used as versatile adhesion sensors to investigate a broad range of adhesion processes in aqueous media.

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A novel AFM based method for force measurements between individual hair strands

Cited by 21 publications

References 12 publications

Forensic Potential of Atomic Force Microscopy with Special Focus on Age Determination of Bloodstains

Forensic Potential of Atomic Force Microscopy with Special Focus on Age Determination of Bloodstains

Tribological Properties between Taut Hair Fibers in Wet Conditions: A New Shampoo Formulation for Eliminating Stick‐Slip Friction

Hydrogel Microparticles as Sensors for Specific Adhesion: Case Studies on Antibody Detection and Soil Release Polymers

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