Effect of monomer geometry on the fractal structure of colloidal rod aggregates

被引：85

作者：

Mohraz, A ^{[1
]}

Moler, DB ^{[1
]}

Ziff, RM ^{[1
]}

Solomon, MJ ^{[1
]}

机构：

[1] Univ Michigan, Ann Arbor, MI 48109 USA

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 92卷 / 15期

关键词：

D O I：

10.1103/PhysRevLett.92.155503

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The fractal structure of clusters formed by diffusion-limited aggregation of rodlike particles is characterized over three decades of the scattering vector q, and displays an unexpected dependence on the aspect ratio of the constituent monomers. Monte Carlo simulations of aggregating Brownian rods corroborate the experimental finding that the measured fractal dimension is an increasing function of the monomer aspect ratio. Moreover, increasing the rod aspect ratio eliminates the structural distinction between diffusion- and reaction-limited cluster aggregation that is observed for spheres.

引用

收藏

页码：155503 / 1

页数：4

相关论文

共 25 条

[1]

Brenner H., 1974, International Journal of Multiphase Flow, V1, P195, DOI 10.1016/0301-9322(74)90018-4

[2] PREPARATION OF COLLOIDAL BOEHMITE NEEDLES BY HYDROTHERMAL TREATMENT OF ALUMINUM ALKOXIDE PRECURSORS [J].

BUINING, PA ;

PATHMAMANOHARAN, C ;

JANSEN, JBH ;

LEKKERKERKER, HNW .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1991, 74 (06) :1303-1307

[3] SCATTERING OF LIGHT FROM CYLINDRICAL PARTICLES - COUPLED DIPOLE METHOD CALCULATIONS AND THE RANGE OF VALIDITY OF THE RAYLEIGH-GANS-DEBYE APPROXIMATION [J].

BUITENHUIS, J ;

DHONT, JKG ;

LEKKERKERKER, HNW .

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1994, 162 (01) :19-24

[4] SPINODAL-TYPE DYNAMICS IN FRACTAL AGGREGATION OF COLLOIDAL CLUSTERS [J].

CARPINETI, M ;

GIGLIO, M .

PHYSICAL REVIEW LETTERS, 1992, 68 (22) :3327-3330

[5] TRANSITION FROM SEMIORDER TO DISORDER IN THE AGGREGATION OF DENSE COLLOIDAL SOLUTIONS [J].

CARPINETI, M ;

GIGLIO, M .

PHYSICAL REVIEW LETTERS, 1993, 70 (24) :3828-3831

[6] Universal aging features in the restructuring of fractal colloidal gels [J].

Cipelletti, L ;

Manley, S ;

Ball, RC ;

Weitz, DA .

PHYSICAL REVIEW LETTERS, 2000, 84 (10) :2275-2278

[7] SUSPENSIONS OF PROLATE SPHEROIDS IN STOKES-FLOW .2. STATISTICALLY HOMOGENEOUS DISPERSIONS [J].

CLAEYS, IL ;

BRADY, JF .

JOURNAL OF FLUID MECHANICS, 1993, 251 :443-477

[8] Use of a charge coupled device camera for low-angle elastic light scattering [J].

Ferri, F .

REVIEW OF SCIENTIFIC INSTRUMENTS, 1997, 68 (06) :2265-2274

[9] Enhanced kinetics and free-volume universality in dense aggregating systems [J].

Fry, D ;

Sintes, T ;

Chakrabarti, A ;

Sorensen, CM .

PHYSICAL REVIEW LETTERS, 2002, 89 (14) :1-148301

[10] GEOMETRICAL PERCOLATION-THRESHOLD OF OVERLAPPING ELLIPSOIDS [J].

GARBOCZI, EJ ;

SNYDER, KA ;

DOUGLAS, JF ;

THORPE, MF .

PHYSICAL REVIEW E, 1995, 52 (01) :819-828