Mechanical stability of tenuous objects
نویسندگان
چکیده
2014 Low-density structures such as colloidal aggregates become increasingly easy to deform mechanically as their size increases. We use recently-proposed scaling properties of such aggregates to investigate the effects of thermal fluctuations and of gravitational forces on such structures. For typical colloidal aggregates, made of 100 A particles, the diameter may not exceed 103 to 104 particle diameters without significant distortion due to both thermal and gravitational effects. Constituent particles of this order of size are optimal : much larger or much smaller particles make mechanically less stable aggregates. J. Physique Lett. 45 (1984) L-675 L-679 1~ JUILLET 1984, Classification Physics Abstracts 63.50 46.30C
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