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NANOSENSORS Chemically characterizing the cortical cell nano-structure of human hair using atomic force microscopy integrated with infrared spectroscopy (AFM-IR) - news

Chemically characterizing the cortical cell nano-structure of human hair using atomic force microscopy integrated with infrared spectroscopy (AFM-IR)Thu Dec 08 2022

The structure of hair fibres has been the focus of much research over the last century with several techniques used to investigate their structure. *
The main constituent of hair fibres of relevance to their mass, volume and associated mechanical properties is the cortex. *
As the major constituent, and responsible for a significant proportion of the structural and mechanical properties of hair, quantitative characterization of the chemical and physical sub-structure of the cortex is important. *
In the article “Chemically characterizing the cortical cell nano-structure of human hair using atomic force microscopy integrated with infrared spectroscopy (AFM-IR)” A. P. Fellows, M. T. L. Casford and P. B. Davies describe how they used the hybrid technique of AFM-IR, combining atomic force microscopy with an IR laser, which circumvents the diffraction limit of light and achieves nanoscale chemical resolution down to the AFM tip radius. *
Their study extends the work of previous publications, focussing on chemical characterization of the internal sub-structures of hair cortical cells in order to gain insight into the differential constitution of the individual components. *
The atomic force microscopy integrated with infrared spectroscopy (AFM-IR) was employed on ultra-thin microtomed cross-sections of human hair fibres to spectrally distinguish and characterize the specific protein structures and environments within the nanoscale components of cortical cells. *
The resulting spectral analysis showed clear distinctions in the Amide bands in the macrofibrils and surrounding intermacrofibrillar matrix, yielding novel insight into the molecular structure and intermolecular stabilization interactions of the constituent proteins within each cortical component.*
NANOSENSORS™ gold coated AdvancedTEC ATEC-ContAu tip view AFM probes (typical force constant: 0.2 N/m, typical resonance frequency: 15 kHz) were used. *
Please have a look at the NANOSENSORS blog for the full citation and a direct link to the full article.

BudgetSensors CalvinQuate.jpg

Happy birthday Prof. Quate!Wed Dec 07 2022

Today we remember the late Prof. Calvin Quate, who, together with Gerd Binnig and Christoph Gerber, constructed the first Atomic Force Microscope in 1986. The three scientists received the Kavli Prize in 2016 in recognition of their invention.

Happy birthday Prof. Quate!

NanoWorld Happy Thanksgiving - news

Happy ThanksgivingThu Nov 24 2022

Happy Thanksgiving to all our friends in the USA and Canada! Enjoy the time with family and friends and don’t forget to visit us @NanoAndMore USA booth no. 311 @Materials_MRS MRS Fall 2022 after the holidays if you are planning to travel to Boston to participate in the conference. We’re looking forward to seeing you […]

NANOSENSORS Photoinduced Charge Transfer and Trapping on Single Gold Metal Nanoparticles on TiO2 - news

Photoinduced Charge Transfer and Trapping on Single Gold Metal Nanoparticles on TiO2Tue Nov 22 2022

Photoinduced Charge Transfer and Trapping on Single Gold Metal Nanoparticles on TiO2
Numerous advances of societal significance, such as CO2 conversion to fuels, hydrogen production by water splitting, and new materials with self-cleaning and antifogging properties, are based on heterogeneous photocatalysis. * Strategies to increase charge separation in the photocatalyst include decorating the surface with metal nanoparticles (NPs). * The Schottky barrier at the metal–semiconductor interface and […]

NanoWorld World Science Day for Peace and Development - news

World Science Day for Peace and DevelopmentThu Nov 10 2022

We ‘re celebrating the World Science Day for Peace and Development today. On every 10 November the World Science Day for Peace and Development aims to bring science and society closer together by pointing to possible solutions science, technology and innovation can offer for the global challenges that our society faces in this day and […]

NanoWorld Piezoelectric property of PZT nanofibers characterized by resonant piezo-force microscopy - news

Piezoelectric property of PZT nanofibers characterized by resonant piezo-force microscopyMon Nov 07 2022

Nano-piezoelectric materials such as 1D piezoelectric nanofibers, nanowires, and nanobelts have attracted a lot of research interest in recent years. * Because of their active property that can transform strain energy into electricity, 1D piezoelectric nano-materials can be building blocks for nano-generators, strain sensors, acoustic sensors, force sensors, biosensors, self-powered drug delivery systems, piezoelectric transistors […]

NANOSENSORS Male-female communication enhances release of extracellular vesicles leading to high fertility in Drosophila - news

Male-female communication enhances release of extracellular vesicles leading to high fertility in DrosophilaFri Oct 28 2022

Male-female communication enhances release of extracellular vesicles leading to high fertility in Drosophila
The female reproductive tract (female-RT) must decipher the repertoire of molecular cues received from the male during copulation in order to activate and coordinate tract functionality necessary for high fertility. In Drosophila, this modulation is partially driven by spermathecal secretory cells (SSC). The SSC are a layer of cuboidal secretory glandular cells surrounding the spermatheca […]

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