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Cutting it down to size activity

What is Nanoscience?

The study of matter on the “nanometer” scale.A nanometer is one billionth (10–9) of a meter.

Nanoparticles are usually between 1 and 100 nanometers in size: 1 – 100 nm.

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cm mm m nm

10-2 10-3 10-610-4 10-5 10-7 10-8 10-9(m)

Hair100 m

Penny2 cm

Raindrop1 mm

Red Blood Cell5 m

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Calculating the number of molecules along the edge of a sugar cube activity

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Measuring the diameter of a human hair activity

Material Measurement Laboratory

Soft Body Armor Toward

the Nano-Effect

Gale A. HolmesNational Institute of Standards & Technology

Materials Measurement Laboratory8

Material Measurement Laboratory

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Soft Body Armor: Primary Functions

•Stop Projectile Motion – Trampoline Effect

•Minimize Energy Dissipation of Impacting Projectile –Back Face Signature

Material Measurement Laboratory

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Effects of the Shear Thickening Fluid (STF) on the body armor application

Wedge through phenomenon Tensile machine

Kolsky bar

100 101 102 103

Silica particles, 55-65 Vol.% in PEG

Material Measurement Laboratory

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SEM Micrographs of Woven Fabrics with Shear Thickening Fluid (STF)

Material Measurement Laboratory

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Effects of the Shear Thickening Fluid (STF) on Back Face Deformation

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1) Coffee cup AFM 2) Magnetic force microscope

Atomic Force Microscopy (AFM)

How an atomic force microscope “see” atoms

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Scanning Tunneling Microscopy (STM)

Nano-corral of 48 iron atoms on copper surface positioned one at a time with an STM tip Corral diameter 14 nm

An STM image of nanoparticles.

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