Rapid Fabrication of High-Aspect-Ratio Platinum Microprobes by Electrochemical Discharge Etching

Zhang, Min; Lian, Xiangwei

doi:10.3390/ma9040233

Cited by 11 publications

(6 citation statements)

References 22 publications

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“…In the setup, an electrochemically etched Platinum–Iridium (Pt/Ir) wire of 127 m diameter was composed of 20 %wt. Ir (Alfa Aesar) microprobe was produced with an adopted method described by Zhang et al 43 and Khan et al 44 . The Pt/Ir microprobe was installed on a nanomanipulator (Kleindiek MM3A) attached to the XY-stage of an optical microscope (Nikon Optiphot 100).…”

Section: Resultsmentioning

confidence: 99%

Modeling and characterization of stochastic resistive switching in single Ag2S nanowires

Frick

Hosseini

Guilbaud

et al. 2022

Sci Rep

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Chalcogenide resistive switches (RS), such as Ag2S, change resistance due to the growth of metallic filaments between electrodes along the electric field gradient. Therefore, they are candidates for neuromorphic and volatile memory applications. This work analyzed the RS of individual Ag2S nanowires (NWs) and extended the basic RS model to reproduce experimental observations. The work models resistivity of the device as a percolation of the conductive filaments. It also addressed continuous fluctuations of the resistivity with a stochastic change in volume fractions of the filaments in the device. As a result, these fluctuations cause unpredictable patterns in current-voltage characteristics and include a spontaneous change in resistance of the device during the linear sweep that conventional memristor models with constant resistivity cannot represent. The parameters of the presented stochastic model of a single Ag2S NW were fitted to the experimental data and reproduced key features of RS in the physical devices. Moreover, the model suggested a non-core shell structure of the Ag2S NWs. The outcome of this work is aimed to aid in simulating large self-assembled memristive networks and help to extend existing RS models.

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Section: Resultsmentioning

confidence: 99%

Modeling and characterization of stochastic resistive switching in single Ag2S nanowires

Frick

Hosseini

Guilbaud

et al. 2022

Sci Rep

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“…25) Zhang and Lian discussed the behavior during the AC tip etching. 26) Vitus et al showed the light emission spectra of sparking during the etching and confirmed all the elements in the etching process. 27) Libioulle et al conducted additional micro polishing with H 2 SO 4 aq.…”

Section: Introductionmentioning

confidence: 92%

Automatic shutdown system of alternating current electrochemical etching for the preparation of a platinum/iridium tip for scanning tunneling microscopy and the investigation of the byproduct of platinum chloride particles

Takami

Kitamura

Hiramoto

et al. 2019

Jpn. J. Appl. Phys.

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The automatic shutdown system of alternating current (AC) etching for fabricating platinum/iridium (Pt/Ir) wire to produce a tip used for scanning tunneling microscopy (STM) has been developed. We have modified a conventional automatic shutdown system of direct current (DC) etching, usually used for producing a tungsten STM tip, by adding the rectifying circuit and relay switching circuit. The development of the automatic AC shutdown system enabled us to produce the sharp Pt/Ir STM tips with high reproducibility. Also, the byproducts of the platinum chloride particles during the electrochemical etching process were investigated. The shape and the average size of the platinum chloride particle made from the ribbon electrode was tabular and 20 μm and those from the wire electrode was granular and 5 μm, estimated from scanning electron microscope (SEM) images, whereas the average of the core platinum crystalline particles was 4 nm, estimated from X-ray diffraction (XRD) using the Debye-Sherrer equation. The size and shape of the particles were controlled with AC frequency and the shape of the etched metal electrode. The developed production method of platinum chloride particles using inexpensive chemicals implements the process of the fabrication with simple apparatus.

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“…As a result, the electrode potential decreases and deviates from the expected electrode potential, leading to electrochemical polarization. [26][27][28] Extensive experimental analyses have demonstrated that an etching voltage of 13 V is optimal, resulting in the smallest achievable radius at the tip of the platinum wire. After the etching process, probes were cleaned with deionized water to 026501-2…”

Section: Fabrication Of the Probementioning

confidence: 99%

Fabrication of oscillating metal probe for dynamic scanning microwave microscopy

Wang,

Wen,

Xue

et al. 2024

Jpn. J. Appl. Phys.

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Microwave probe plays a critical role in near-field imaging, and there is a continuous effort to develop them through straightforward methods. This study designed and fabricated an oscillating metal probe and used it for scanning microwave imaging of micro-nano structures. The surface smoothness of the cantilever is approximately 19.3 nm after polishing with diamond abrasive paper, and the tip radius is less than 20 nm using electrochemical etching. The impact of metal electrode materials on microwave signals was assessed in the frequency range of 1-20 GHz. The microwave imaging capability of the devised probe was explored through the imaging of a micro-nano structure. The spatial resolution of microwave imaging reached 0.5 μm over a scanning area of 50 μm × 50 μm. This study has far-reaching significance for developing higher performance microwave probes and advancing scanning microwave microscopy.

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Rapid Fabrication of High-Aspect-Ratio Platinum Microprobes by Electrochemical Discharge Etching

Cited by 11 publications

References 22 publications

Modeling and characterization of stochastic resistive switching in single Ag2S nanowires

Modeling and characterization of stochastic resistive switching in single Ag2S nanowires

Automatic shutdown system of alternating current electrochemical etching for the preparation of a platinum/iridium tip for scanning tunneling microscopy and the investigation of the byproduct of platinum chloride particles

Fabrication of oscillating metal probe for dynamic scanning microwave microscopy

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