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Philips Research - Download Pictures
Nanotechnology
If you want to download high-resolution versions of the pictures,
please click at the hyperlink below the thumbnail.
The use of the
pictures is free but in publications the source of these pictures must
be mentioned. The source can be found below the caption of the
pictures. |
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10.5 x 7.5 cm, 300 dpi, 192 KB
Silicon nanowires
Philips has invented a new method to produce silicon
nanowires with much greater efficiency. Electrochemical
etching of a pre-indented silicon wafer results in the
formation of pores. Under the right conditions, silicon
nanowires remain at the points where three pores merge.
The new technique yields over 4 billion wires in a
single etch step. Silicon nanowires could be used in
field emission displays or new types of sensing devices.
Photo: Philips
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7.5 x 7.5 cm, 300 dpi, 146 KB
NanoLEDs
Nanowires of indium phosphide (InP) are well suited for
miniature light-emitting diodes (LEDs) in the yellow and
green colour range. The LED is obtained by introducing a
junction between differently doped regions within a
wire. NanoLEDs are promising for light-emitting
displays, integrated optics for communications purposes
or light sources.
Photo: Philips
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11 x 7 cm, 300 dpi, 129 KB
Quantum dot composites
Particles of inorganic semiconducting material with
nanometer scale dimensions ("quantum dots") exhibit
size-dependent electronic and optical properties which
are different from those of bulk solids. Philips is
investigating quantum dots in composites with polymers
to combine the favourable properties of inorganic
materials with those of polymers. These materials could
be used as light-emitting diodes (LEDs) of which the
colour is determined by the size of the quantum dots.
Photo: Philips
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20 x 6.5 cm, 300 dpi, 597 KB
Carbon nanotube field emitters for microscopes
Images taken by a transmission electron microscope
(TEM), of an individual carbon nanotube mounted on a
tungsten tip. In a), the end of the tungsten tip (dark)
and the complete nanotube (light) can be seen. Picture
b) shows the apex of the nanotube under larger
magnification. The apex has a radius of just 2.7
nanometers.
Photo: Philips
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8 x 8 cm, 300 dpi, 357 KB
Carbon nanotube field emitters for microscopes
An individual carbon nanotube (multiwalled type)
molecule is mounted on a tungsten tip and is used as the
electron source of a scanning electron microscope. An
electron beam drawn from the extremely small apex of the
carbon nanotube has a high current and small energy
spread, which can be used to increase the resolution of
the microscope. The pictures are transmission electron
microscope images of the carbon nanotube on the tungsten
tip at several magnifications.
Photo: Philips
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8.5 x 8 cm, 300 dpi, 177 KB
Liquid Crystal Helix structures
By controlling the pitch of helically shaped structures
of liquid crystals, light reflection in a controlled
wavelength is obtained. This can be used to increase the
brightness and power consumption of displays. Philips
Research, together with the Eindhoven University of
Technology and the University of Alberta, Canada, has
developed world-leading technologies to these structures
of liquid-crystals with precisely controlled 3-D
dimensions.
Photo: Philips
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