Prospects for single molecule information processing devices

Wada, Yasuo

doi:10.1109/5.940278

Cited by 31 publications

(14 citation statements)

References 120 publications

(129 reference statements)

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“…Molecular electronics is one of the most promising nanostorage approaches, which has the potential to replace current semiconductor based information devices [24,25]. Joseph Weiss discovered in 1942 that charge transfer could happen in certain molecular complexes with electron donor and acceptor molecules [26].…”

Section: Molecular Electronicsmentioning

confidence: 99%

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Nanoscale Data Storage

Li¹

2009

High Density Data Storage

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The object of this article is to review the development of ultrahigh-density, nanoscale data storage, i.e., "nanostorage". As a fundamentally new type of storage system, the recording mechanisms of nanostorage may be completely different to those of the traditional devices. Currently, two types of 'molecules' are being studied for potential application in nanostorage. One is molecular electronic elements including molecular wires, rectifiers, switches, and transistors. The other approach employs nanostructured materials such as nanotubes, nanowires, and nanoparticles. The challenges for nanostorage are not only the materials, ultrahigh data-densities, fabrication-costs, device operating temperatures and large-scale integration, but also the development of the physical principles and models. There are already some breakthroughs obtained, but it is still unclear what kind of nanostorage systems can ultimately replace the current silicon based transistors. A promising candidate may be a molecular-nanostructure hybrid device with sub-5 nm dimensions.

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Section: Molecular Electronicsmentioning

confidence: 99%

“…The next milestone, after single-molecule junction toward nanostorage, may be up to realize three-terminal molecular devices [24]. For single-molecule three-terminal device, there are two configurations (Fig.…”

Section: Three-terminal Molecular Devicementioning

confidence: 99%

Nanoscale Data Storage

Li¹

2009

High Density Data Storage

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“…The use of an individual molecule as active material in a transistor would be a significant step toward single-molecule devices [89]. As early as 1974 Aviram Figure 2: Conducting, semiconducting and insulating materials are required to assemble an insulated gate FET, but the configuration is relative simple and well suited for low-cost production.…”

Section: Polymer Electronicsmentioning

confidence: 99%

Molecular Information Technology

Zauner

2005

Critical Reviews in Solid State and Materials Sciences

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ABSTRACT:Molecular materials are endowed with unique properties of unrivaled potential for high density integration of computing systems. Present applications of molecules range from organic semiconductor materials for low-cost circuits to genetically modified proteins for commercial imaging equipment. To fully realize the potential of molecules in computation, information processing concepts that relinquish narrow prescriptive control over elementary structures and functions are needed, and self-organizing architectures have to be developed. Investigations into qualitatively new concepts of information processing are underway in the areas of reaction-diffusion computing, self-assembly computing, and conformation-based computing. Molecular computing is best considered not as competitor for conventional computing, but as an opportunity for new applications. Microrobotics and bioimmersive computing are among the domains likely to benefit from advances in molecular computing. Progress will depend on both novel computing concepts and innovations in materials. This article reviews current directions in the use of bulk and single molecules for information processing. KEY WORDS:polymer electronics, molecular switches, self-assembly computing, conformation-based computation, self-organizing materials, bioimmersive computing

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“…It has been demonstrated that these impediments can be overcome by using a nonclassical device architecture that does not rely on doping or inversion layer-conduction channel formation. Thorough overviews of the concepts, prospects, and expected impact of molecular electronic devices have been given in the literature (7,(11)(12)(13)(14).The work of Tour, Reed, and colleagues (5) on two-terminal self-assembled monolayer (SAM) devices has advanced the technology of molecular electronic devices. Their nanoscale device uses charge flow in the conjugated molecule 2Ј-amino-4-ethynylphenyl-4Ј-ethynylphenyl-5Ј-nitro-1-benzenethiol, which has polar functional groups that can be used to switch the device.…”

mentioning

confidence: 99%

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confidence: 99%

Distributed response analysis of conductive behavior in single molecules

Panhuis

Munn

Popelier

et al. 2002

Proc. Natl. Acad. Sci. U.S.A.

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The ab initio computational approach of distributed response analysis is used to quantify how electrons move across conjugated molecules in an electric field, in analogy to conduction. The method promises to be valuable for characterizing the conductive behavior of single molecules in electronic devices. If Moore's law (every 12-24 months the number of transistors on a silicon chip doubles) is to continue to apply until the year 2020, transistor features will have to shrink to molecular scale. This small size will lead to problems that spell the end of Moore's law in classical system architecture. These problems are related to the way dopants are distributed in each device. As transistor size decreases, dopants may aggregate, or statistical deviations in dopant density from device to device may become important. Equally serious is that very small transistors must have very small insulator gates. As dimensions decrease, quantum mechanical tunneling across the gate becomes important. At very small scales, this tunneling acts to decrease device efficiency, presenting a significant limitation: as processing power increases, computationally intensive fields such as virtual reality, complex image recognition, nanorobotics, and real-time holography develop and demand increases in step.In recent years, this need for new transistor architecture has stimulated the emerging field of molecular-scale electronics (1-10). It has been demonstrated that these impediments can be overcome by using a nonclassical device architecture that does not rely on doping or inversion layer-conduction channel formation. Thorough overviews of the concepts, prospects, and expected impact of molecular electronic devices have been given in the literature (7,(11)(12)(13)(14).The work of Tour, Reed, and colleagues (5) on two-terminal self-assembled monolayer (SAM) devices has advanced the technology of molecular electronic devices. Their nanoscale device uses charge flow in the conjugated molecule 2Ј-amino-4-ethynylphenyl-4Ј-ethynylphenyl-5Ј-nitro-1-benzenethiol, which has polar functional groups that can be used to switch the device. Applying a voltage to the gate electrode sets up an electric field, to which the polar groups respond by changing their orientation, breaking the effective conjugation between adjacent carbon atoms and hence limiting current flow, corresponding to switching from the ON to the OFF state (1, 3-5, 15, 16). Current-voltage measurements at 60 K showed an ON-OFF peak-to-valley ratio of 1,030:1 (5).Three-terminal molecular devices, such as the SAM organic field effect transistor (SAMFET) as reported by Schön et al. (9,10), in contrast to two-terminal devices have the ability to modulate the conductance and achieve gain in logic circuits. A schematic of the SAMFET device using the molecule 4,4Ј-biphenyldithiol (BPDT) as reported in refs. 9 and 10 is shown in Fig. 1, with a SAM connected to source and drain electrodes. It is reported that the drain current can be modulated by Ϸ5 orders of magnitude by an applied gate voltage....

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Prospects for single molecule information processing devices

Cited by 31 publications

References 120 publications

Nanoscale Data Storage

Nanoscale Data Storage

Molecular Information Technology

Distributed response analysis of conductive behavior in single molecules

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