Magnetic field enhanced nano-tip fabrication for four-probe STM studies

McKendry, Jonathan; Allen, Christopher S.; Critchley, Kevin; Górzny, Marcin Ł.; Walton, Alex S.; Evans, Stephen D.

doi:10.1088/0957-4484/19/8/085201

Cited by 11 publications

(10 citation statements)

References 24 publications

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“…The tungsten tips for this study were prepared by electrochemical etching under a magnetic field. [36] The I-V curve (Fig. 2B) acquired for the exact configuration shown in Figure 2A indicates that the 29-nm-diameter Au NWs behave in a perfectly Ohmic manner.…”

mentioning

confidence: 87%

“…[27,28] One of the advantages of the MPSTM technique is the possibility of plotting resistance against sensing tip separation, allowing one to calculate the resistivity of NWs using several measurements. [26,29,36] Resistance versus probe separation data for the 92-nm and 185-nm diameter Au NWs are shown in Figure 2C, which correspond to resistivities of 2.19 AE 0.06 mV.cm and 2.1 AE 0.2 mV.cm, respectively, i.e. corresponding to bulk gold.…”

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confidence: 99%

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Near‐Bulk Conductivity of Gold Nanowires as Nanoscale Interconnects and the Role of Atomically Smooth Interface

et al. 2010

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The electronics industry has consistently decreased the dimensions of structural components and they are now well into the nanoscale range. Naturally, a significant portion of the chip is composed of interconnects. Besides, the engineering problems associated with short wavelength lithography to achieve smaller components, the performance of increasing number of interconnections has become one of the biggest limiting factors in device performance.[1,2] The power loss, signal degradation, interconnection delays, and other performance limitations related to interconnects should be minimized. The importance of such a task can be seen from the perspective of power dissipation by computation elements. The energy dissipation density in electronic chips approaches that in nuclear reactors. [3,4]

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confidence: 87%

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confidence: 99%

Near‐Bulk Conductivity of Gold Nanowires as Nanoscale Interconnects and the Role of Atomically Smooth Interface

et al. 2010

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“…This shut‐off circuit stopped the etching with a 1 µs ‘shut‐off’ time, once the current dropped below a set point. This fast termination of the etching current improved the tip sharpness (McKendry et al ., ). The etching current was divided into two resistors (0.5 and 50 Ω) connected to a real ground and a virtual ground (input of a current amplified), respectively.…”

Section: Methodsmentioning

confidence: 97%

Mechanically stable tuning fork sensor with high quality factor for the atomic force microscope

et al. 2014

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A quartz tuning fork was used instead of cantilever as a force sensor for the atomic force microscope. A tungsten tip was made by electrochemical etching from a wire of 50 µm diameter. In order to have mechanical stability of the tuning fork, it was attached on an alumina plate. The tungsten tip was attached on the inside end of a prong of a tuning fork. The phase shift was used as a feedback signal to control the distance between the tip and sample, and the amplitude was kept constant using a lock-in amplifier and a homemade automatic gain controller. Due to the mechanical stability, the sensor shows a high quality factor (∼10(3)), and the image quality obtained with this sensor was equivalent to that of the cantilever-based AFM.

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“…Electrical transport measurements were performed under ultrahigh-vacuum conditions ($2 Â 10 À10 mbar). Details of the technique can be found elsewhere [8,18,31].…”

Section: Methodsmentioning

confidence: 99%

Synthesis of High‐Surface‐Area Platinum Nanotubes Using a Viral Template

Górzny

Walton

Evans

2010

Adv Funct Materials

120

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A novel method for the synthesis of high‐active‐surface‐area, platinum–tobacco mosaic virus (Pt–TMV) nanotubes is presented. A platinum salt is reduced to its metallic form on the external surface of a rod‐shaped TMV by methanol, which serves as a solvent and reductant simultaneously. It was found that for the same Pt loading the Pt–TMV nanotubes had an electrochemically active surface area between 4 to 8 times larger than similarly sized Pt nanoparticles. A Pt–TMV catalyst displays greater stability in acidic conditions than those based on nanoparticles. When used as a catalyst for methanol oxidation, these Pt nanotubes display a 65% increase in catalytic mass activity compared to that based on Pt nanoparticles.

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Magnetic field enhanced nano-tip fabrication for four-probe STM studies

Cited by 11 publications

References 24 publications

Near‐Bulk Conductivity of Gold Nanowires as Nanoscale Interconnects and the Role of Atomically Smooth Interface

Near‐Bulk Conductivity of Gold Nanowires as Nanoscale Interconnects and the Role of Atomically Smooth Interface

Mechanically stable tuning fork sensor with high quality factor for the atomic force microscope

Synthesis of High‐Surface‐Area Platinum Nanotubes Using a Viral Template

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