Self-assembly of metallic double-dot single-electron device

Guttman, A.; Mahalu, D.; Sperling, Joseph; Cohen-Hoshen, Eyal; Bar‐Joseph, I.

doi:10.1063/1.3624899

Cited by 16 publications

(15 citation statements)

References 14 publications

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“…electrodes connected to macroscopic sourcedrain electrodes. 28,[34][35][36] Using this approach, Bar-Joseph et al in 2005 probed, for the first time, the transport properties across a single molecule that bridges two metal NPs. 37 The interest of the research community has remained on this strategy for several years, developing sophisticated synthetic approaches to build NP aggregates of controlled size in solution, 36,[38][39][40][41][42][43] and to place these proto-devices onto electrodes.…”

Section: Resultsmentioning

confidence: 99%

The conquest of middle-earth: combining top-down and bottom-up nanofabrication for constructing nanoparticle based devices

et al. 2014

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The development of top-down nanofabrication techniques has opened many possibilities for the design and realization of complex devices based on single molecule phenomena such as e.g. single molecule electronic devices. These impressive achievements have been complemented by the fundamental understanding of self-assembly phenomena, leading to bottom-up strategies to obtain hybrid nanomaterials that can be used as building blocks for more complex structures. In this feature article we highlight some relevant published work as well as present new experimental results, illustrating the versatility of self-assembly methods combined with top-down fabrication techniques for solving relevant challenges in modern nanotechnology. We present recent developments on the use of hierarchical self-assembly methods to bridge the gap between sub-nanometer and micrometer length scales. By the use of non-covalent self-assembly methods, we show that we are able to control the positioning of nanoparticles on surfaces, and to address the deterministic assembly of nano-devices with potential applications in plasmonic sensing and single-molecule electronics experiments.

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Section: Resultsmentioning

confidence: 99%

The conquest of middle-earth: combining top-down and bottom-up nanofabrication for constructing nanoparticle based devices

et al. 2014

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“…[11][12][13] In the context of molecular electronics, AuNPs can be regarded as potential ultra-small electrodes, and the unique optical and electronic properties of AuNPs have been explored for development of biosensors and biomedicine. [14][15][16][17][18][19][20][21][22][23] Connecting AuNPs with conducting molecular wires or electrochemically active molecular components is an intriguing thought. If AuNPs are connected via a mechanically interlocked structure, for example a pseudo-rotaxane, one can envisage a molecular wire connecting the AuNPs covered in an insulating layer, thus mimicking the macroscopic design of a copper wire.…”

Section: Introductionmentioning

confidence: 99%

A gold-nanoparticle stoppered [2]rotaxane

et al. 2018

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The construction of molecular machines has captured the imagination of scientists for decades. Despite significant progress in the synthesis and studies of the properties of small-molecule components (smaller than 2-5 kilo Dalton), challenges regarding the incorporation of molecular components into real devices are still eminent. Nano-sized molecular machines operate the complex biological machinery of life, and the idea of mimicking the amazing functions using artificial nano-structures is intriguing. Both in small-molecule molecular machine components and in many naturally occurring molecular machines, mechanically interlocked molecules and structures are key functional components. In this work, we describe our initial efforts to interface mechanically-interlocked molecules and gold-nanoparticles (AuNPs); the molecular wire connecting the AuNPs is covered in an insulating rotaxane-layer, thus mimicking the macroscopic design of a copper wire. Taking advantage of recent progress in the preparation of supramolecular complexes of the cucurbit[7]uril (CB[7]) macrocycle, we have prepared a bis-thiol functionalised pseudo-rotaxane that enables us to prepare a AuNP-stoppered [2]rotaxane in water. The pseudo-rotaxane is held together extremely tightly (Ka > 1013 M-1), Ka being the association constant. We have studied the solution and gas phase guest-host chemistry using NMR spectroscopy, mass spectroscopy, and electrochemistry. The bis-thiol functionalised pseudo-rotaxane holds further a ferrocene unit in the centre of the rotaxane; this ferrocene unit enables us to address the system in detail with and without CB[7] and AuNPs using electrochemical methods.

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“…Fabricating small and compact junctions usually requires complex, multi-step processes which are not easily reproducible or scalable, and are not compatible with standard clean room methods. 12,14 On the other-hand, simple methods for fabricating nanogaps, usually have low control over gap size 15 or are limited in scaling the junction cross section. 16,17 Therefore, it is highly desired to develop nanogap device fabrication schemes that would be compatible with standard silicon device technologies.…”

Section: Introductionmentioning

confidence: 99%

Self-formed nanogap junctions for electronic detection and characterization of molecules and quantum dots

et al. 2017

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Fabrication of self-forming nanojunction devices is demonstrated using positioning of nanofloret-like building blocks that serve as self-assembled electrodes. A main feature of the device is a self-formed nanogap bridging between the nanofloret (NF) hybrid nanostructures (HNS) and a macroscopic counterelectrode. When nanostructures are introduced to the device they provide facile bridging across the nanostructure. This strategy is used to demonstrate electronic measurements across molecules and nanoparticles. Connecting the NF nanojunction to the micro-, and macro-scales is achieved by applying standard, robust, optical lithography. In addition, the devices are operable at ambient conditions and in solvent environments, where introducing molecules to the device results in a prominent change in the conductance characteristics. Furthermore, introduction of quantum dots results in the mapping of their band structure at ambient conditions. Our results provide a proof-of-concept of large scale self-forming nanogap device platform realized using simple fabrication tools. Such a technology can be used for molecular detectors, as a potential building block for molecular electronics, or as a platform for fundamental research.

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Self-assembly of metallic double-dot single-electron device

Cited by 16 publications

References 14 publications

The conquest of middle-earth: combining top-down and bottom-up nanofabrication for constructing nanoparticle based devices

The conquest of middle-earth: combining top-down and bottom-up nanofabrication for constructing nanoparticle based devices

A gold-nanoparticle stoppered [2]rotaxane

Self-formed nanogap junctions for electronic detection and characterization of molecules and quantum dots

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