A Self‐Assembled Single‐Electron Tunneling Device

Persson, Stefan; Olofsson, Linda; Hedberg, Lise; Sutherland, Danny; Olsson, Eva

doi:10.1111/j.1749-6632.1998.tb09872.x

Cited by 10 publications

(5 citation statements)

References 18 publications

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“…By control of the properties of the solution in which the Fig. 5 (From Jartoft and Krantz, 1997) colloidal particles are kept, it is possible to control how such particles attach to a surface (Johnson and Lenhoff, 1996;Persson et al, 1998;Hanarp et al, 1999). It is possible, for example, to deposit monolayers of uniformly distributed particles (Krozer et al, 1995).…”

Section: (33) Colloidal-based Fabrication Techniquesmentioning

confidence: 99%

Implant Surfaces and Interface Processes

1999

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The past decades and current R&D of biomaterials and medical implants show some general trends. One major trend is an increased degree of functionalization of the material surface, better to meet the demands of the biological host system. While the biomaterials of the past and those in current use are essentially bulk materials (metals, ceramics, polymers) or special compounds (bioglasses), possibly with some additional coating (e.g., hydroxyapatite), the current R&D on surface modifications points toward much more complex and multifunctional surfaces for the future. Such surface modifications can be divided into three classes, one aiming toward an optimized three-dimensional physical microarchitecture of the surface (pore size distributions, "roughness", etc.), the second one focusing on the (bio) chemical properties of surface coatings and impregnations (ion release, multi-layer coatings, coatings with biomolecules, controlled drug release, etc.), and the third one dealing with the viscoelastic properties (or more generally the micromechanical properties) of material surfaces. These properties are expected to affect the interfacial processes cooperatively, i.e., there are likely synergistic effects between and among them: The surface is "recognized" by the biological system through the combined chemical and topographic pattern of the surface, and the viscoelastic properties. In this presentation, the development indicated above is discussed briefly, and current R&D in this area is illustrated with a number of examples from our own research. The latter include micro- and nanofabrication of surface patterns and topographies by the use of laser machining, photolithographic techniques, and electron beam and colloidal lithographies to produce controlled structures on implant surfaces in the size range 10 nm to 100 microns. Examples of biochemical modifications include mono- or lipid membranes and protein coatings on different surfaces. A new method to evaluate, e.g., biomaterial-protein and biomaterial-cell interactions--the Quartz Crystal Microbalance--is described briefly.

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Section: (33) Colloidal-based Fabrication Techniquesmentioning

confidence: 99%

Implant Surfaces and Interface Processes

1999

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“…(2) Use of solid nano-electrodes to address a single molecule Another method for measuring the conductance of a linear molecule is to place a molecule between two solid electrodes separated by a few nm. [94][95][96] Linear molecules are attached to the electrode structures either by immersion in a solution or vacuum evaporation. Considering the current status of nanolithography, [73][74][75] these achievements in fabricating few nm gaps are quite notable.…”

Section: Two Terminal Conductance Measurement Technologiesmentioning

confidence: 99%

Prospects and Problems of Single Molecule Information Devices

Wada

Tsukada

Fujihira

et al. 2000

Jpn. J. Appl. Phys.

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Current information technologies use semiconductor devices and magnetic/optical discs, however, it is foreseen that they will all face fundamental limitations within a decade. This paper reviews the prospects and problems of single molecule devices, including switching devices, wires, nanotubes, optical devices, storage devices and sensing devices for future information technologies and other advanced applications in the next paradigm. The operation principles of these devices are based on the phenomena occurring within a single molecule, such as single electron transfer, direct electron-hole recombination, magnetic/charge storage and regand-receptor reaction. Four possible milestones for realizing the Peta (10 15 )-floating operations per second (P-FLOPS) personal molecular supercomputer are described, and the necessary technologies are listed. These include, (1) two terminal conductance measurement on single molecule, (2) demonstration of two terminal molecular device characteristics, (3) verification of three terminal molecular device characteristics and (4) integration of the functions of "molecular super chip". Thus, 1000 times higher performance information technologies would be realized with molecular devices.

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“…The most used SET implementation methods are shadow evaporation [26][27][28][29], scanning probe microscope tip modification [30,31], electromigration [32][33][34], nanoscale oxidation [35,36] and mechanically controlled break junction formation [37,38]. By the advance of nanofabrication processes and technology the use of nanoscale objects like nanoparticles [39][40][41][42][43][44], nanotubes [45][46][47], fullerenes [48,49] and single-molecules [20,50] as nano-islands for SET devices has been demonstrated.…”

Section: Introductionmentioning

confidence: 99%

Direct-write single electron transistors by focused electron beam induced deposition

et al. 2019

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Single-electron transistor (SET) device fabrication for operation in the tens of Kelvin range is still challenging due to the need of controlled definition of the metallic island with a diameter far below 100 nm and proper tuning of the island’s tunnel couplings to the drain and source leads. Here we present results on SET device fabrication using focused electron beam induced deposition (FEBID) for island definition between pre-fabricated SET electrode structures. The island’s nano-granular microstructure allows us, in conjunction with in situ tuning of the inter-grain tunnel coupling by post-growth electron irradiation, to study the effect of the island’s electronic granularity on SET device performance. In addition we show that for reliable SET operation FEBID-associated co-deposit in proximity of the island has to be removed which can be accomplished by a novel in situ Ar ion etching process. For the low-temperature properties of functioning SET devices we obtain good agreement of capacitance values deduced from the current–voltage characteristics and capacitance calculations based on the geometry of the device electrodes and the microstructure of the island. Complementary simulations of the SET current–voltage characteristics based on the master equation approach are in good agreement with the experimental data. The observation of well-defined Coulomb oscillations indicates that FEBID-based SET structures can be useful as on-demand charge monitor devices with high lateral positioning flexibility.

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A Self‐Assembled Single‐Electron Tunneling Device

Cited by 10 publications

References 18 publications

Implant Surfaces and Interface Processes

Implant Surfaces and Interface Processes

Prospects and Problems of Single Molecule Information Devices

Direct-write single electron transistors by focused electron beam induced deposition

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