| Date | 28th, Feb 2022 |
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Fractal bodies in bubbles / The word “fractal” originates from “fractional”. Few could imagine fractal bodies with non-integer dimensions between two-dimensional (a plane) and three-dimensional (a cube, for example) figures. However, there are many fractal bodies around us such as clouds and coastlines, indicating fractal shapes are the most natural and fundamental forms of existence in nature. Our finding of the universal relationship between physical properties and sample dimensions indicates that the dimensions also govern all kinds of physical and mechanical properties as a principle of nature. Credit: Toshio Naito, Ehime University
It has been known that nanoparticles, for example, exhibit quite different properties from the bulk samples of the same materials. Yet nobody knows why. Ehime University researchers discovered a control method of the fractal dimensions of any solid sample, enabling systematic and detailed examination of various physical properties of samples with different dimensions. As a result, they discovered the universal relationship between physical properties and fractal dimensions.
From heavenly bodies to human cells, everything in this universe possesses finite dimensions in three directions in space; everything in the real world is three-dimensional, according to Euclidean geometry. However thin or small a nanoscale object is, the dimensions can not be altered. Accordingly, it has been firmly believed that nobody could change or control the dimensions of real matter. However, by instead paying attention to fractal dimensions, dimension control is possible in a facile way.
The researchers prepared a series of mixed powder samples with the same material but with different fractal dimensions, corresponding to a different mixed ratio between the substance of interest and wax. Using these samples, they examined their structures and physical properties in detail. They also examined materials with different properties to confirm the universality of the results. With the aid of theoretical calculation based on original models and methods, they discovered that there is a universal relationship between the sample fractal dimensions and their physical properties, such as electrical conduction and magnetism. This could be a newly unveiled principle of nature, in which the dimension of matter governs all its physical and mechanical properties.
More information: Toshio Naito et al, The universal relationship between sample dimensions and cooperative phenomena: effects of fractal dimension on the electronic properties of high-TC cuprate observed using electron spin resonance, Physical Chemistry Chemical Physics (2021). DOI: 10.1039/D1CP04709D
Provided by Ehime University
Citation: Discovering the universal relationship between physical properties and fractal dimensions (2022, February 28) retrieved 6 June 2022 from https://phys.org/news/2022-02-universal-relationship-physical-properties-fractal.html
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