Structure, Conductance and Strength of Iridium Wires of Single Atom Width

Ryu, Minoru; Kizuka, Tokushi

doi:10.1143/jjap.45.8952

Cited by 19 publications

(20 citation statements)

References 59 publications

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“…34,35,[46][47][48][49][50][51] HRTEM enables us to observe directly the atomic configuration of ASWs. 28,[41][42][43][44][45][52][53][54][55][56][57][58][59][60][61][62][63][64][65][66][67] However, ASWs observed by HRTEM have been restricted to less than five constituent atoms owing to instability. Therefore, the atomic configuration of longer stable ASWs and the relationship to their electrical and mechanical properties still remain open problems.…”

Section: Introductionmentioning

confidence: 99%

Atomic configuration and mechanical and electrical properties of stable gold wires of single-atom width

2008

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The formation dynamics of stable gold ͑Au͒ wires of single-atom width during tensile deformation of the nanometer-sized Au contacts was observed in situ at room temperature by transmission electron microscopy. Simultaneously, force and conductance were measured using functions of scanning probe microscopy. The wires were extended to 2.7Ϯ 0.1 nm and the number of atoms was increased to 10; the average interatomic distance was 0.30Ϯ 0.02 nm. The duration of the observation of the wires exceeded 10 s. The results of the simultaneous observation of the atomic configuration, force, and conductance led to the conclusion that the stable Au wires observed in this study are complexed with light-element atoms. The constants of the mechanical properties of the individual wires, i.e., elastic limit, Young's modulus, and strength, were analyzed on the basis of stress-strain curves experimentally measured on an atomic scale. During elastic elongation, a force of 1.6Ϯ 0.7 nN acted on the Au wires with an elastic limit of 0.15-0.20. Young's modulus of single-atom-width Au wires was 47-116 GPa and strength was 8 -17 GPa, estimated using a cross-sectional area of 0.118 nm 2 , which is that of a single atom in bulk along ͗110͘. Using these mechanical constants, the average interatomic distance in stress-free wires was estimated to be 0.26Ϯ 0.02 nm. The histogram of conductances for the single-atom-width Au wires showed a peak at approximately 1G 0 ͑where G 0 =2e 2 / h, e being the charge of an electron and h Planck's constant͒ until the total number of atoms exceeds 5. For longer wires constructed of more than six atoms, the conductance decreased to less than 0.1G 0 .

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Section: Introductionmentioning

confidence: 99%

Atomic configuration and mechanical and electrical properties of stable gold wires of single-atom width

2008

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“…The conductance quantization-type NCs, such as Au, Ag [26,75] and Cu [34] ASWs, were also observed. On the other hand, those of anti-quantization-type NCs, such as Pt [47,51], Pd [47,76], Ir [66], and Co [47]ASWs, were also observed.…”

Section: Deformation Of Ncsmentioning

confidence: 99%

Combined Transmission Electron Microscopy — In situ Measurements of Physical and Mechanical Properties of Nanometer-sized Single-phase Metallic structucre

Masuda¹

2015

The Transmission Electron Microscope - Theory and Applications

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This chapter reviews the results of silver nanometer-sized contacts (Ag NCs). To realize fabrication, atomistic observation, and mechanical and electrical measurement of Ag NCs, an in situ method where a contact-retract test of atomic force microscopy and a current feedback function of scanning tunnelling microscopy have been combined with high-resolution transmission electron microscopy (HRTEM). By inserting these functions inside HRTEM, it has been enabled to observe atomistic structures, which can be formed at the final stage of a rapture process, and to measure a change of properties correlated to structural dynamics.

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“…Such atomic sized TEMAFM experiments have also been performed for other studies such as on palladium [129] and iridium [130] atomic wide wires. Gold atomic wires have also been studied using a conductance feedback loop to maintain a constant number of electron transport channels [131].…”

Section: Atomic Scale Wiresmentioning

confidence: 99%

Combining Scanning Probe Microscopy and Transmission Electron Microscopy

Nafari¹,

Angenete²,

Svensson

et al. 2010

Scanning Probe Microscopy in Nanoscience and Nanotechnology 2

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This chapter is a review of an in situ method where a scanning probe microscope (SPM) has been combined with a transmission electron microscope (TEM). By inserting a miniaturized SPM inside a TEM, a large set of open problems can be addressed and, perhaps more importantly, one may start to think about experiments in a new kind of laboratory, an in situ TEM probing laboratory, where the TEM is transformed from a microscope for still images to a real-time local probing tool. In this method, called TEMSPM, the TEM is used for imaging and analysis of a sample and SPM tip, while the SPM is used for probing of electrical and mechanical properties or for local manipulation of the sample. This chapter covers both instrumental and applicational aspects of TEMSPM. Abbreviations

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Structure, Conductance and Strength of Iridium Wires of Single Atom Width

Cited by 19 publications

References 59 publications

Atomic configuration and mechanical and electrical properties of stable gold wires of single-atom width

Atomic configuration and mechanical and electrical properties of stable gold wires of single-atom width

Combined Transmission Electron Microscopy — In situ Measurements of Physical and Mechanical Properties of Nanometer-sized Single-phase Metallic structucre

Combining Scanning Probe Microscopy and Transmission Electron Microscopy

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