Nanodevices, Nanoelectronics, and Nanosensors

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工業技術研究院產業經濟與資訊服務中心Industrial Technolgy Research InstituteIndustrial Economics & Knowledge Center

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Nanodevices, Nanoelectronics, and Nanosensors

Rational You

ITRI-IEK-NEMS

2001/08/01

Source: IWGN (1999/09)

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Organic nanostructures

• on left, showing self-assembly of benzene-1,4-dithiol onto Au electrodes; • on right, showing room-temperature I-V measurements suggesting presenc

e of a Coulomb gap

Source: IWGN (1999/09), M. Reed et al. 1997

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Logical design of a defect-tolerant circuit

(a) shows a “fat tree” architecture in which every member of a logical level of the tree hierarchy can communicate with every member at the next level; in the case of a defective component, this structure enables one to route around and avoid the defect;

(b) shows how this architecture is implemented using cross bars, which are very regular structures and look like something that can be built chemically.


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Atomic structure of one of the molecular switches

• The switch can be closed electronically in a solid-state circuit by applying the appropriate voltage across the molecule (Balzani et al. 1998; Credi et al. 1997).


• This molecule conducts via resonant tunneling through unoccupied molecular orbitals when it is in its reduced chemical state (switch closed), but it is a tunneling barrier in its oxidized state (switch open).

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I-V of a large number of molecular switches

• This portion of the I-V curve is highly reproducible until the potential across the molecule exceeds +1 V.

• This voltage irreversibly oxidizes the switches, and after this process, applying a negative voltage results repeatedly in a “small” current, demonstrating that the switch is open.


• Initially, the molecular switches are closed, and applying a negative voltage across the molecules results in a “large” current flow that varies exponentially with the magnitude of the applied voltage.

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Synthesis of the active molecular compound and its precursors

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Field-effect transistor based on a single 1.6 nm diameter carbon nanotube

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Source: IWGN (1999/09), Martel et al. 1998

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Commercial IBM GMR Read Head

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Nano-electronics: device and architecture options for high-performance electronics

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Resonant tunneling device

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Source: IWGN (1999/09), (Moffat 1999

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Resonant tunneling adder cor

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Source: IWGN (1999/09), (Seabaugh 1998

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Avionics roadmap

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Nanobiological anticancer agent PK1

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Source: IWGN (1999/09), Lee 1998

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Models for 3” self-assembled robots

• Three-inch-diameter self-assembled robots mark the spot where an unexploded mine rests under the surface.

• Such robots are cheap, solar-powered, and have no processor to make application or miniaturization difficult.


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Integrated Nanotechnology in Microsystems

• The control of mechanical, electrical, optical, and chemical properties at the nanoscale will enable significant improvements in integrated microsystems.


Documents

Nanodevices, Nanoelectronics, and Nanosensors