Novel axial and radial nanowire photovoltaic elements seen emerging from a scanning electron micrograph of silicon core-shell nanowires. From B. Tian, T.J. Kempa and C.M. Lieber, Chem. Soc. Rev. 38, 16-24 (inside front cover) |
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Our silicon nanowire biosensor is on the cover of the Fifth Edition text,
Chemistry: The Molecular Nature of Matter and Change, by Martin Silberberg. The cover image is
designed by Michael Goodman. [larger image without type] |
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A hybrid structure consisting of a neuron with separate axon-nanowire (upper left branch) and
dendrite-nanowire (upper right, lower left branches) interfaces demonstrates our ability to form
multiple inputs and/or outputs to a single neuron. After stimulation at the soma (center),
elicited signals can be measured at each of the cell-nanowire interfaces. Alternatively, the cell
can be stimulated at the axon-nanowire interface with resulting signals measured at the two
dendrite-nanowire connections. [Science 313,
1100 (2006)] |
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We show a single neuron (green), with an axon crossing an array of 50 nanowire devices (metallic
contacts are yellow; individual nanowires are not visible) having 10 micron pitch. The speed,
shape and time evolution of a signal can be mapped in real-time as it propagates along the axon.
Individual nanowire elements can also be re-configured to simulate the axon or modulate an already
propagating signal, providing our array with additional and unprecedented functionality.
[Science 313, 1100 (2006)] |
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Left: A high angle annular dark field scanning transmission electron microscopy image of undoped
GaN/AlN/AlGaN nanowire cross-section. Center: Schematic of top-gated nanowire field-effect transistor.
Right: GaN/AlN/AlGaN nanowire heterostructure exhibits electron mobility of 3100 cm2/Vs at room
temperature. [Nano Lett. 6, 1468 (2006)] |
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Top: Schematics of the nanowire photonic crystal with four engineered defects (left) and the nanowire racetrack microresonator (right).
Bottom: Scanning electron microscope micrograph of the nanowire photonic crystal (left) and optical micrograph of the nanowire racetrack microresonator (right). |
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Scanning gate microscopy images of axial modulation doped silicon nanowires, in which the electronic properties are encoded during synthesis; the bright and dark regions reflect the variation in encoded electronic properties. [Science 310, 1304 (2005)] |
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III-nitride-based nanowire radial heterostructures as multicolor and high-efficiency light-emitting diodes. |
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Constant current STM image of a Au (111) surface with 4-5 single atomic steps and a screw dislocation. Image was taken in UHV at 78K with sample bias of -0.5V, tunneling current of 0.1nA, and scan size of 37nm. |
Constant current STM image of three carbon nanotubes on a Au (111) surface; the herringbone reconstruction on the Au (111) surface is also visible. Image was taken in UHV at 78K, with a sample bias -1.5V, tunneling current of 0.2nA, and a scan size of 17nm. |
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High frequency nanowire ring oscillators on glass. (Top) Optical images of nanowire ring oscillators fabricated on glass, and corresponding circuit diagram. The patterned nanowire film appears white in the image. (Bottom) 11.7 MHz oscillation from a nanowire ring oscillator on glass. Nature 434, 1085 (2005). |
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Ballistic 1D transport in Ge/Si core/shell nanowire heterostructures. PNAS 102, 10046 (2005). |
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A transmission electron microscope (TEM) image of a Cadmium Sulfide nanowire. |
A photoluminescence image of a Cadmium Sulfide nanowire. |
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The background shows a scanning electron microscopy image of the entangled silicon nanowires after the synthesis on the substrate. Using hierarchical organization strategy we developed, repeating arrays of crossed nanowires were made starting from these randomly oriented nanoscale building blocks. The hierarchy of the structures, including specific nanowire building block, nanowire pitch, nanowire orientation, array size, array orientation and array pitch, were controlled independently. |
Nanowire solutions ready for assembly. |
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Glass (left) and plastic substrates resting against a solution of nanowires. The glass and plastic contain arrays of nanowire devices. |
A flexible plastic substrate containing arrays of nanowire devices. The devices do not degrade under the effect of bending. |
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NiSi/Si nanowire heterostructure devices. Nature 430, 61 (2004). |
Dark-field optical image of a NiSi/Si nanowire superlattice. Nature 430, 61 (2004). |
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GaN p-n crossed nanowire blue LED. Nano Lett. 3, 343 (2003). |
Epitaxially grown p-type GaN nanowire array. Nano Lett. 3, 343 (2003). |
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Silicon nanowire address decoder. Science 302, 1377 (2003). |
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