Particles disc-shaped

Table 6.2 Theoretical multiplication factors for anisometric particles with an aspect ratio r 1. (Note For a disc-shaped particle the aspect ratio is the ratio of disc diameter disk thickness and for a rod-shaped particle it is the ratio of rod length rod diameter). (Source R. Bown, Physical and Chemical Aspects of the Use of Fillers in Paper , in Paper Chemistry , ed. J.C. Roberts, Blackie, Glasgow, 1992, pp. 162-196).

Like the liquid crystalline ordering of collection of rod-shaped particles in concentrated dispersions, collections of disc-shaped particles should also exhibit orientational order with sufficient concentration and narrow size and shape distributions [113, 114]. Moreover, disc-like objects are experimentally observed to exhibit nematic, smectic and columnar type mesophases in consistent with theoretical predictions. Since graphene can be considered as disc-like nano-object with very high aspect ratio, it has been shown that upon dispersion in sufficiently high concentrations it exhibits liquid crystalline phase behavior. The following are the different methods to fabricate and stabilize graphene based liquid crystalline phases. 

Fig. 8.49 Relative toughness predictions for initial tilt and for maximum twist based on crack deflection model for disc-shaped particles of two aspect ratios [20]. With kind permission of Elsevier...

Repeat Exercise 1.1 for a disc-shaped particle of diameter 2.00 mm and length 0.500 mm. 

Pulse height was not directly proportional to particle volume for rod and disc shaped particles, but was modified by a shape factor, dependent on their orientation within the aperture. 

Equations 6.4 to 6.6 represent the widely used Guinier approximation for globular particles. Approximations pertaining to rod-like and disc-shaped particles using appropriate particle scattering functions can he found in the... 

Colloidal metal disc-shaped particles were self-assembled by sedimentation and then slowly dried in air (Figure 1(a)). Once the particles were dried, they were slowly sintered as described in the experimental section (Figure 1(b)). 

Figure 4s (a) A previous doublet formed from two gold spheres that had been forced apart. The arrows indicate where the two spheres were joined, (b) A wide-field SEM ima of colloidal disc-shaped particles, (c) An SEM image of dried untreated RBCs on a silicon substrate. 

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