Studies of probe tip materials by atomic force microscopy: a review

Xu, Ke; Liu, Yuzhe

doi:10.3762/bjnano.13.104

Cited by 6 publications

(9 citation statements)

References 53 publications

(52 reference statements)

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“…MFM is a special AFM operational mode, which uses a flexible cantilever with a tip consisting of a magnetic material [100,238]. The AFM tip geometry and material vary depending on the final experimental purpose, and the fundamentals of the AFM probe selection rely on the measured physico-chemical properties [239]. The cantilever bends when touching the sample surface following the linear-Hookean force law [240]:…”

Section: Working Principles Of Mfmmentioning

confidence: 99%

“…MFM is a special AFM operational mode, which uses a flexible cantilever with a tip consisting of a magnetic material [ 100 , 238 ]. The AFM tip geometry and material vary depending on the final experimental purpose, and the fundamentals of the AFM probe selection rely on the measured physico-chemical properties [ 239 ]. The cantilever bends when touching the sample surface following the linear-Hookean force law [ 240 ]:

where F is the sensed force, k corresponds to the cantilever spring constant, and Δ z refers to the cantilever deflection, which is the direction perpendicular to the scanning plane and sample.…”

Section: Working Principles Of Mfmmentioning

confidence: 99%

See 1 more Smart Citation

A Review of the Current State of Magnetic Force Microscopy to Unravel the Magnetic Properties of Nanomaterials Applied in Biological Systems and Future Directions for Quantum Technologies

Winkler,

Ciria,

Ahmad

et al. 2023

Nanomaterials

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Magnetism plays a pivotal role in many biological systems. However, the intensity of the magnetic forces exerted between magnetic bodies is usually low, which demands the development of ultra-sensitivity tools for proper sensing. In this framework, magnetic force microscopy (MFM) offers excellent lateral resolution and the possibility of conducting single-molecule studies like other single-probe microscopy (SPM) techniques. This comprehensive review attempts to describe the paramount importance of magnetic forces for biological applications by highlighting MFM’s main advantages but also intrinsic limitations. While the working principles are described in depth, the article also focuses on novel micro- and nanofabrication procedures for MFM tips, which enhance the magnetic response signal of tested biomaterials compared to commercial nanoprobes. This work also depicts some relevant examples where MFM can quantitatively assess the magnetic performance of nanomaterials involved in biological systems, including magnetotactic bacteria, cryptochrome flavoproteins, and magnetic nanoparticles that can interact with animal tissues. Additionally, the most promising perspectives in this field are highlighted to make the reader aware of upcoming challenges when aiming toward quantum technologies.

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Section: Working Principles Of Mfmmentioning

confidence: 99%

“…MFM is a special AFM operational mode, which uses a flexible cantilever with a tip consisting of a magnetic material [ 100 , 238 ]. The AFM tip geometry and material vary depending on the final experimental purpose, and the fundamentals of the AFM probe selection rely on the measured physico-chemical properties [ 239 ]. The cantilever bends when touching the sample surface following the linear-Hookean force law [ 240 ]:

Section: Working Principles Of Mfmmentioning

confidence: 99%

A Review of the Current State of Magnetic Force Microscopy to Unravel the Magnetic Properties of Nanomaterials Applied in Biological Systems and Future Directions for Quantum Technologies

Winkler,

Ciria,

Ahmad

et al. 2023

Nanomaterials

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“…The interaction between the tip and sample influences the measurement results of AFM by convoluting the tip topography with the sample surface topography [ 7 ]. A sharper needle tip leads to more accurate measurements [ 8 ]. During the scanning process, tip and sample come into mutual contact, causing wear on the tip [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

Quantitative wear evaluation of tips based on sharp structures

Xu,

Leng

2024

Beilstein J. Nanotechnol.

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To comprehensively study the influence of atomic force microscopy (AFM) scanning parameters on tip wear, a tip wear assessment method based on sharp structures is proposed. This research explored the wear of AFM tips during tapping mode and examined the effects of scanning parameters on estimated tip diameter and surface roughness. The experiment results show that the non-destructive method for measuring tip morphology is highly repeatable. Additionally, a set of principles for optimizing scanning parameters has been proposed. These principles consider both scanning precision and tip wear. To achieve these results, an AFM probe was used to scan sharp structures, precisely acquiring the tip morphology. Tip wear was minimized by employing lower scanning frequency and free amplitude, and a set point of approximately 0.2, resulting in clear, high-quality AFM images.

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“…Existing reviews on AFM probe modification techniques either focus solely on one type of modification technique, 54,55 or do not summarize the corresponding preparation methods. 56 More importantly, there is a lack of introductions to specific application scenarios. In current reviews, probe modification techniques and their applications are often treated as separate entities, which clearly hinders the application and development of the technology.…”

Section: Introductionmentioning

confidence: 99%

Applications of AFM in Membrane Characterization and Fouling Analysis

Liu,

Zhu,

Chen

et al. 2024

ACS EST Eng.

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Atomic force microscopy (AFM), as a type of scanning probe microscopy (SPM), possesses formidable capabilities for nanoscale imaging and force spectroscopy. Due to its advantages such as high resolution, nondestructive detection, minimal environmental restrictions, strong versatility, and real-time in situ analysis, AFM has become an indispensable tool in surface science and materials research, finding extensive applications in the study of the membrane separation and fouling processes. The tremendous advantages of AFM in characterization applications stem from its diverse tip functionalization techniques. This review encompasses the preparation of AFM probe tips and the modification techniques of special tips, including carbon nanotube (CNT) probes, metal nanowire probes, colloidal probes, and single-cell/molecule probes. Furthermore, it highlights the applications and advancements of AFM and probe modification techniques in membrane technology research. With the continuous development of tip modification techniques, the analytical capabilities of AFM will be further expanded, promising broader prospects for its application in the study of membrane fouling mechanisms and the development of antifouling membrane materials.

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Studies of probe tip materials by atomic force microscopy: a review

Cited by 6 publications

References 53 publications

A Review of the Current State of Magnetic Force Microscopy to Unravel the Magnetic Properties of Nanomaterials Applied in Biological Systems and Future Directions for Quantum Technologies

A Review of the Current State of Magnetic Force Microscopy to Unravel the Magnetic Properties of Nanomaterials Applied in Biological Systems and Future Directions for Quantum Technologies

Quantitative wear evaluation of tips based on sharp structures

Applications of AFM in Membrane Characterization and Fouling Analysis

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