arXiv subjects

Ken-ichi Amano

Publications and source records attributed to Ken-ichi Amano.

21 records · Page 2Linked to original sources

arXiv2013

A method of comparison between a force curve measured on a solvated surface and the solvation structure

Recent atomic force microscopy (AFM) can measure force curves between a probe and a sample surface in solvent. The force curve is thought as the solvation structure in some cases, because its shape is generally oscilltive and pitch of the oscillation is about the same as diameter of the solvent. However, it is not the solvation structure. It is just only a mean force between the probe and the sample surface. A theoretical relation between the mean force and the solvation structure is not clearly known. Therefore, the relation must be elucidated theoretically to deepen understanding of the mean force measured by the AFM. In this letter, we briefly explain the relation and a method for comparing the measured mean force and the solvation structure (that obtained by a simulation, a liquid theory, or a x-ray reflectivity) by using basic statistical mechanics of liquid.

physics.chem-ph↗

arXiv2013

Relation between a force curve measured on a solvated surface and the solvation structure: Relational expressions for a binary solvent and a molecular liquid

Recent atomic force microscopy (AFM) can measure force curves between a probe and a sample surface in several solvents. The force curve is thought as the solvation structure in some cases, because its shape is generally oscilltive and pitch of the oscillation is about the same as diameter of the solvent. However, it is not the solvation structure. It is just only a mean force between the probe and sample surface. Since theoretical relation between the mean force and the solvation structure had not been clearly known, we have recently derived a relational expression within a simple liquid. Although we have derived the relational expression within the simple liquid, the relational expressions for a binary solvent and a molecular liquid have still not known clearly. Hence, we try to obtain the relational expressions in the two types of the solvents. In this letter, we briefly derive the relations and explain a method for comparing the mean force measured by liquid AFM and the solvation structure (obtained by a simulation, a liquid theory, or a x-ray reflectivity). The derivations of the relational expressions are performed in the basis of classical statistical mechanics of liquid.

physics.chem-ph↗

arXiv2011

Theoretical study of solvent-mediated Ising-like system: A study for future nanotechnology

We theoretically study physical properties of one-dimensionally and regularly placed solutes. The solute is rigid-body, has arrow-like shape, and changes its direction up or down. If the solutes are immersed in continuum solvent, nothing happens in the system. However, the property of the directions differs in granular solvent (e.g., hard-sphere solvent). Depending on distance between the nearest-neighbor solutes, the directional property periodically changes as follows: "ferromagnetic-like" \leftrightarrow "random" \leftrightarrow "antiferromagnetic-like". Furthermore, the directional property decays into "random" as the distance increases. Studying a newly created nano-system theoretically, it is able to discover a new or interesting property hiding in nano-material world. We believe that such an approach gives physics research a new direction and contributes to nanotechnology.

physics.chem-ph↗