scholarly journals Number density distribution of solvent molecules on a substrate: a transform theory for atomic force microscopy

2016 ◽  
Vol 18 (23) ◽  
pp. 15534-15544 ◽  
Author(s):  
Ken-ichi Amano ◽  
Yunfeng Liang ◽  
Keisuke Miyazawa ◽  
Kazuya Kobayashi ◽  
Kota Hashimoto ◽  
...  
Keyword(s):  
Atomic Force Microscopy ◽  
Density Distribution ◽  
Number Density ◽  
Force Curve ◽  
Force Microscopy ◽  
Atomic Force ◽  
Hydration Structure ◽  
Solvent Molecules

A theory that transforms the force curve into a hydration structure is derived, and the transformation is demonstrated.

scholarly journals Correction: Number density distribution of solvent molecules on a substrate: a transform theory for atomic force microscopy

2016 ◽  
Vol 18 (29) ◽  
pp. 19973-19974
Author(s):  
Ken-ichi Amano ◽  
Yunfeng Liang ◽  
Keisuke Miyazawa ◽  
Kazuya Kobayashi ◽  
Kota Hashimoto ◽  
...  
Keyword(s):  
Atomic Force Microscopy ◽  
Density Distribution ◽  
Chem Phys ◽  
Number Density ◽  
Force Microscopy ◽  
Atomic Force ◽  
Solvent Molecules ◽  
Phys Chem Chem Phys

Correction for ‘Number density distribution of solvent molecules on a substrate: a transform theory for atomic force microscopy’ by Ken-ichi Amano et al., Phys. Chem. Chem. Phys., 2016, 18, 15534–15544.

scholarly journals A relationship between the force curve measured by atomic force microscopy in an ionic liquid and its density distribution on a substrate

2017 ◽  
Vol 19 (45) ◽  
pp. 30504-30512 ◽  
Author(s):  
Ken-ichi Amano ◽  
Yasuyuki Yokota ◽  
Takashi Ichii ◽  
Norio Yoshida ◽  
Naoya Nishi ◽  
...  
Keyword(s):  
Atomic Force Microscopy ◽  
Ionic Liquid ◽  
Density Distribution ◽  
Force Curve ◽  
Force Microscopy ◽  
Atomic Force ◽  
Solvation Structure ◽  
Measured Force

A relationship between the force curve measured in an ionic liquid and the solvation structure is studied. Applying the obtained relationship, candidates of the solvation structure are estimated from a measured force curve.

Comparison of atomic force microscopy force curve and solvation structure studied by integral equation theory

2021 ◽  
Vol 154 (16) ◽  
pp. 164702
Author(s):  
Kota Hashimoto ◽  
Ken-ichi Amano ◽  
Naoya Nishi ◽  
Hiroshi Onishi ◽  
Tetsuo Sakka
Keyword(s):  
Integral Equation ◽  
Atomic Force Microscopy ◽  
Integral Equation Theory ◽  
Force Curve ◽  
Force Microscopy ◽  
Atomic Force ◽  
Solvation Structure

Approximate Real-Time Force Spectroscopy Within Amplitude-Modulation Atomic Force Microscopy Topographical Imaging Using Few Harmonics and Fourier Methods

2021 ◽  
Author(s):  
Berkin Uluutku ◽  
Santiago D. Solares
Keyword(s):  
Atomic Force Microscopy ◽  
Signal To Noise Ratio ◽  
Gaussian Model ◽  
Force Curve ◽  
Simple Method ◽  
Force Microscopy ◽  
Electromagnetic Interactions ◽  
Atomic Force ◽  
Mechanical Deformations ◽  
Specialized Hardware

Abstract Quantitative measurement of the probe-sample interaction forces as a function of distance and time during imaging has been at the forefront of atomic force microscopy (AFM) research. This type of information is extremely valuable for understanding the material response to a variety of stimuli and interactions, such as mechanical deformations that vary in magnitude and rate of application, chemical interactions, or electromagnetic interactions. A variety of methods for performing such measurements simultaneously with topographical imaging is available, including methods based on Fourier analysis. Within these methods, reconstruction of the tip-sample force curve generally requires measurement of a large number of harmonics of the probe oscillation, which presents challenges such as the need for specialized hardware, low signal-to-noise ratio, and the need for extensive user expertise. In this paper, we present a simple method to perform a Gaussian-model-based fit of the tip-sample force curve across the surface, simultaneously with imaging, which requires measurement of only the first two or three harmonics for elastic materials. While such an approach only offers an approximate representation of the force curve, it can be highly accurate and fast, and has low instrumentation requirements, such that it can be relatively simple to implement on most commercial AFM setups.

scholarly journals Probing the nanofriction of non-halogenated phosphonium-based ionic liquid additives in glycol ether oil on titanium surface

Friction ◽  
2021 ◽  
Author(s):  
Xiuhua Qiu ◽  
Linghong Lu ◽  
Zhenyu Qu ◽  
Jiongtao Liao ◽  
Qi Fan ◽  
...  
Keyword(s):  
Atomic Force Microscopy ◽  
Titanium Surface ◽  
Friction Reduction ◽  
Number Density ◽  
Density Profiles ◽  
Dibutyl Ether ◽  
Force Microscopy ◽  
Molar Ratios ◽  
Atomic Force ◽  
Oil Mixtures

AbstractThe nanofrictional behavior of non-halogentated phosphonium-based ionic liquids (ILs) mixed with diethylene glycol dibutyl ether in the molar ratios of 1:10 and 1:70 was investigated on the titanium (Ti) substrate using atomic force microscopy (AFM). A significant reduction is observed in the friction coefficient μ for the IL-oil mixtures with a higher IL concentration (1:10, μ ∼ 0.05), compared to that for the lower concentration 1:70 (μ ∼ 0.1). AFM approaching force-distance curves and number density profiles for IL-oil mixtures with a higher concentration revealed that the IL preferred to accumulate at the surface forming IL-rich layered structures. The ordered IL-rich layers formed on the titanium surface facilitated the reduction of the nanoscale friction by preventing direct surface-to-surface contact. However, the ordered IL layers disappeared in the case of lower concentration, resulting in an incomplete boundary layers, because the ions were displaced by molecules of the oil during sliding and revealed to be less efficient in friction reduction.

Studies on Improving PP Fiber Reinforced Concrete

2011 ◽  
Vol 250-253 ◽  
pp. 678-681 ◽  
Author(s):  
Liang Hsing Chou ◽  
Chun Ku Lu ◽  
Maw Tien Lee
Keyword(s):  
Atomic Force Microscopy ◽  
Reinforced Concrete ◽  
Surface Property ◽  
Interaction Force ◽  
Fiber Reinforced Concrete ◽  
Fiber Reinforced ◽  
Force Curve ◽  
Force Microscopy ◽  
Atomic Force ◽  
Polar Probe

Grafting method was used to modify polypropylene (PP) fiber to enhance the fiber reinforced concrete in this study. Polyacrylamide (PAM) was grafted onto PP surface by UV radiation using benzophenone (BP) as a photoinitiator. The microstructure of PP, and the interaction force between PP and the polar probe were observed with an atomic force microscopy (AFM). Experimental results showed that the roughness of PAM-grafted PP surface decreased significantly in comparison with that of the untreated PP surface. In addition, instead of smooth force curve as that of the untreated PP, the interaction between the probe and PAM-grafted PP surface appeared an oscillation. The above results gave the evidences that PAM had been successfully grafted onto the PP surface as discussed . The high hydrophilic property of PAM modifies the surface property of PP fiber and strengthens PP fiber reinforced concrete.

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