Optimization of Q-factor of AFM cantilevers using genetic algorithms

Pérez-Cruz, Ángel; Domínguez-González, Aurelio; Stiharu, Ion; Osornio-Ríos, Roque Alfredo

doi:10.1016/j.ultramic.2012.01.014

Cited by 15 publications

(5 citation statements)

References 34 publications

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“…A high Q ‐value enables high probe sensitivity and image resolution. [ 20 ] Probes with resonance frequency from 35 kHz to 1.41 MHz were obtained by varying the cantilever length. Such cantilever length alteration requires a modification to the mask design for patterning the backside of the wafer, according to Equation (2).…”

Section: Resultsmentioning

confidence: 99%

A Simple Method for Fabrication of Self‐sharpened Silicon Tips for Atomic Force Microscopy Applications

Rudrappa

Venkatramana

Ahmed

et al. 2022

Crystal Research and Technology

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A simple and high yield method is presented for the bulk generation of atomic force microscopy (AFM) probes with self‐sharpened silicon tips. The experimental setup includes a controlled chemical etching environment at a constant temperature with continuous recirculation and filtration. A KOH solution is considered cost‐effective as the etchant and stabilized to the required concentration (55%, v/v) and temperature (40 °C), so as to provide an etch rate of 40 nm min−1 and yield a smooth etch profile. A high density of silicon tips is fabricated, with yield up to 90%, and a consistent tip radius of ≈12.73 ± 1.51 nm. These tips can be successfully integrated with AFM cantilevers, resulting in AFM probes. Further, such AFM‐probes are well characterized using laser Doppler vibrometry and scanning electron microscopy. The result shows a resonance frequency of 1.2–1.4 MHz and a high‐quality factor of ≈708.8. In addition, the AFM probes produced images are comparable in quality to those obtained from commercially available probes.

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Section: Resultsmentioning

confidence: 99%

A Simple Method for Fabrication of Self‐sharpened Silicon Tips for Atomic Force Microscopy Applications

Rudrappa

Venkatramana

Ahmed

et al. 2022

Crystal Research and Technology

View full text Add to dashboard Cite

show abstract

“…The Q factor of an atomic force microscopy cantilever in ultra-high vacuum is of the order 10 3 to 10 4 in the 10-100 MHz range [18]. The Q factor is much lower at regular atmospheric pressure, being of the order 10 2 in the 5-50 kHz range [19]. These values, however, cannot be treated as indicative of the energy recovery potential of a realistic mechanical logic device since the logic gates themselves are neither perfectly rigid nor perfectly elastic, and will probably have significantly lower Q factors than purpose-built cantilevers.…”

Section: Introductionmentioning

confidence: 99%

Simulation of reversible molecular mechanical logic gates and circuits

2023

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Landauer's principle places a fundamental lower limit on the work required to perform a logically irreversible operation. Logically reversible gates provide a way to avoid these work costs and also simplify the task of making the computation as a whole thermodynamically reversible. The inherent reversibility of mechanical logic gates would make them good candidates for the design of practical logically reversible computing systems if not for the relatively large size and mass of such systems. In this paper we outline the design and simulation of reversible molecular mechanical logic gates that come close to the limits of thermodynamic reversibility even under the effects of thermal noise, and outline associated circuit components from which arbitrary combinatorial reversible circuits can be constructed and simulated. We demonstrate that isolated components can be operated in a thermodynamically reversible manner, and explore the complexities of combining components to implement more complex computations. Finally, we demonstrate a method to construct arbitrarily large reversible combinatorial circuits using multiple external controls and signal boosters with a working half-adder circuit.

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“…The Q factor of an atomic force microscopy cantilever in ultra-high vacuum is of the order 10 3 to 10 4 in the 10-100 MHz range [17]. The Q factor is much lower at regular atmospheric pressure, being of the order 10 2 in the 5-50 kHz range [18]. These values, however, cannot be treated as indicative of the energy recovery potential of a realistic mechanical logic device since the logic gates themselves are neither perfectly rigid nor perfectly elastic, and will probably have significantly lower Q factors than purpose-built cantilevers.…”

Section: Introductionmentioning

confidence: 99%

Simulation of reversible molecular mechanical logic gates and circuits

Seet¹,

Ouldridge²,

Doye³

2022

Preprint

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Landauer's principle places a fundamental lower limit on the work required to perform a logically irreversible operation. Logically reversible gates provide a way to avoid these work costs, and also simplify the task of making the computation as a whole thermodynamically reversible. The inherent reversibility of mechanical logic gates would make them good candidates for the design of practical logically reversible computing systems if not for the relatively large size and mass of such systems. In this paper, we outline the design and simulation of reversible molecular mechanical logic gates that come close to the limits of thermodynamic reversibility even under the effects of thermal noise, and outline associated circuit components from which arbitrary combinatorial reversible circuits can be constructed and simulated. We demonstrate that isolated components can be operated in a thermodynamically reversible manner, and explore the complexities of combining components to implement more complex computations. Finally, we demonstrate a method to construct arbitrarily large reversible combinatorial circuits using multiple external controls and signal boosters with a working half-adder circuit.

show abstract

Optimization of Q-factor of AFM cantilevers using genetic algorithms

Cited by 15 publications

References 34 publications

A Simple Method for Fabrication of Self‐sharpened Silicon Tips for Atomic Force Microscopy Applications

A Simple Method for Fabrication of Self‐sharpened Silicon Tips for Atomic Force Microscopy Applications

Simulation of reversible molecular mechanical logic gates and circuits

Simulation of reversible molecular mechanical logic gates and circuits

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