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Scientific Image - Gold Nanoshells (SEM)

To create this scanning electron microscope image, gold nanoshells were dispersed in a drop of water which then dried on a glass microscope slide. The colors are due to selective scattering of light by nanoscale particles.

Gold Nanoshells have a variety of uses in nanotechnology, and especially in biomedical applications. Nanoshells like these may play important roles in new kinds of cancer treatments, disease detection, and imaging techniques.

• SIZE: These gold nanoshells are each about 120 nm in diameter.

• IMAGING TOOL: Scanning electron microscope

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Scientific Image - Gold Nanoshells (optical microscope)

To create this optical microscope image, gold nanoshells were dispersed in a drop of water which then dried on a glass microscope slide. The colors are due to selective scattering of light by nanoscale particles.

Gold Nanoshells have a variety of uses in nanotechnology, and especially in biomedical applications. Nanoshells like these may play important roles in new kinds of cancer treatments, disease detection, and imaging techniques.

• SIZE: These gold nanoshells are each about 120 nm in diameter.

• IMAGING TOOL: Optical microscope

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Scientific Image - Cholera Bacteria

The cholera bacteria in this scanning electron microscope image cause a potentially fatal disease of the digestive system.

• SIZE: These bacteria are each about 500 nm wide and 1-2 µm long.

• IMAGING TOOL: Scanning electron microscope

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Scientific Image - HIV-infected Cells

The tissue culture shown in this scanning electron microscope image is infected with the Human Immunodeficiency Virus, or HIV.

• SIZE: HIV particles are 90-120 nm in diameter.

• IMAGING TOOL: Scanning electron microscope

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Scientific Image - Single Hair from a Gecko's Foot

The feet of the gecko cling to virtually any surface. This scanning electron microscope image shows one of the branching hairs, or setae, on the sole of a gecko's foot. These hairs nestle into nanoscale niches on the contact surface.

The gecko's amazing ability to cling to vertical or inverted surfaces is due to the interaction between nanoscale structures on its feet and tiny crevices on the wall or ceiling. The soles of gecko feet are made up of overlapping adhesive lamellae covered with millions of superfine hairs, or setae, each of which branches out at the end into hundreds...

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Scientific Image - Blue Morpho Butterfly Wing (reflected light)

The colors of the Blue Morpho's wing are generated by nanometer-sized structures on the wing's scales. In this image, light reflected from the scales creates the Morpho's characteristic iridescent blue color.

The Blue Morpho is common in Central and South America and known for its bright blue wings. However, these iridescent colors are created not by pigments in the wing tissues but instead by the way light interacts with nanometer-sized structures on the Morpho's wing scales. This effect is being studied as a model in the development of new fabrics, dye-free paints, and anti-...

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Scientific Image - Blue Morpho Butterfly Wing (non-reflected light)

The colors of the Blue Morpho's wing are generated by nanometer-sized structures on the wing's scales. In this image, only the light passing through the wing is seen, revealing the wing's pigment-produced brown hue.

The Blue Morpho is common in Central and South America and known for its bright blue wings. However, these iridescent colors are created not by pigments in the wing tissues but instead by the way light interacts with nanometer-sized structures on the Morpho's wing scales. This effect is being studied as a model in the development of new fabrics, dye-free paints, and...

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Scientific Image - Nanotubes Mimicking Gecko Feet

The nanoscale structures on a gecko's foot enable it to cling to most surfaces. This scanning electron microscope image shows multiwalled carbon nanotubes attached to a polymer backing, an experiment designed to replicate the gecko foot's adhesive properties.

The gecko's amazing ability to cling to vertical or inverted surfaces is due to the interaction between nanoscale structures on its feet and tiny crevices on the wall or ceiling. The soles of gecko feet are made up of overlapping adhesive lamellae covered with millions of superfine hairs, or setae, each of which branches out...

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Scientific Image - Human Red Blood Cells (SEM)

Red blood cells carry a protein called hemoglobin which has a molecular structure adapted to transport oxygen to body tissues. This scanning electron micrograph shows the cells' characteristic donut-like shapes.

• SIZE: The typical diameter of a human red blood cell is 6-8 µm.

• IMAGING TOOL: Scanning electron microscope

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Scientific Image - Human Red Blood Cells

Red blood cells carry a protein called hemoglobin which has a molecular structure adapted to transport oxygen to body tissues. The cells' flexibility allows them to flow through tiny capillaries.

• SIZE: The typical diameter of a human red blood cell is 6-8 µm.

• IMAGING TOOL: Optical microscope

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