COLLECTIVE DYNAMICS AND DIMENSIONAL EFFECTS OF PHASE FORMATION IN THE «AEROSIL – POLYSTYRENE LATEX» SYSTEM
Abstract
Purpose. In addition to characterizing the optical, electronic, mechanical, and catalytic properties of individual nanoparticles, much attention is paid to the development of methods for assembling nanoparticles into large ordered or disordered superstructures. These assembly methods are based on many different types of interparticle interactions (Van der Waals, magnetic, electrostatic, molecular dipole, covalent and hydrogen bonds). Recently, the drip method has been used to study early structural formation in colloidal systems. When particles interact in a drying drop, depletion forces must be taken into account. In this paper a model experiment has been carried out to study the effect of depletion forces on phase formation during the drying process of a drop.
Methods and methodology. Colloidal suspensions of Aerosil at a concentration of 0.1 mg / ml with a particle size of 100 nm and polystyrene latex with a particle size of 20 nm at a concentration of 10 mg / ml were used as starting materials. Homogeneous colloidal suspensions of a given
concentration were prepared using an ultrasonic disperser UZG-13. The particle sizes of the resulting suspensions were controlled by light scattering on a Photocor mini particle size meter.
A comparative analysis of the drying process of a droplet with the initial components and with their mixture has been conducted in dynamic mode. The experiments were carried out in standard conditions. A digital optical microscope Bresser Advance ID was used to control the drying
dynamics. The morphology and identifi cation of the drying products have been carried out by a set of methods, including IR spectroscopy - Bruker VERTEX 70, scanning microscopy - Jeol JSM-6380LV and transmission microscopy - LIBRA 120 PLUS.
Results. When a droplet of a mixture of aerosil and latex was dried, there was observed the formation and rapid growth of a new phase of microscopic sizes up to ten microns in a matter of tens of seconds. The color of the solution changes sharply from transparent light blue to bright blue. The formation of a new phase is localized in the central region of the drop. According to the data of IR spectroscopy and of electron and transmission microscopy, the resulting phase is crystalline SiO2. To interpret the obtained results, a computational experiment was carried out in a statistical model system of rigid non-interacting spheres in the Broun motion approximation. In the simulation the spatial redistribution of large particles in the presence of small particles is observed, leading to the occurrence of the thickenings. Phase formation is interpreted as the result of the action of the nonequilibrium depletion force under the conditions of the hydrodynamic instability of a drying drop.
Conclusions. In the conditions of a model experiment on phase formation during drying of a drop of a non-interacting particles colloidal solution in the aerosil-polystyrene latex system, the formation and rapid growth of a new phase of crystalline SiO2 has been detected. The phase formation process is accompanied by a sharp change in the color of the solution from light blue to blue. The crystallite size varies from ten nanometers to ten microns. A diffraction pattern of the new phase has been found indicating its crystalline nature.
REFERENCES
- Tret’yakov Yu. D. Self-organisation processes in the chemistry of materials. Uspekhi khimii [Russian Chemical Reviews], 2003, v. 72(8), pp. 651–679. https://doi.org/10.1070/RC2003v072n08ABEH000836
- Kushnir S. E., Kazin P. E., Trusov L. A., Tret’yakov Yu. D. Self-organization of micro- and nanoparticles in ferrofl uids. Uspekhi khimii [Russian Chemical Reviews], 2012, v. 81(6), pр. 560–570. https://doi.org/10.1070/RC2012v081n06ABEH004250
- Lebedev-Stepanov P. V., Kadushnikov R. M., Molchanov S. P., Ivanov A. A., Mitrokhin V. P., Vlasov K. O., Rubin N. I., Yurasik G. A., Nazarov V. G., Alfi mov M. V. Self-assembly of nanoparticles in the microvolume of colloidal solution: Physics, modeling, and experiment. Rossiiskie nanotekhnologii [Nanotechnologies in Russia], 2013, v. 8(3-4), pр. 137–162. https://doi.org/10.1134/S1995078013020110
- Walker D. A., Kowalczyk B., Cruz M. O., Grzybowski B. A. Electrostatics at the nanoscale. Nanoscale, 2011, v. 3(4), pp. 1316–1344. https://doi.org/10.1039/C0NR00698J
- Ouyang Q., Castets V., Boissonade J., et al. Sustained patterns in chlorite–iodide reactions in a onedimensional reactor. J. Chem. Phys., 1991, v. 95(1), pp. 351–360. https://doi.org/10.1063/1.461490
- Tarasevich Yu. Yu., Pravoslavnova D. M. Kachestvennyy analiz zakonomernostey vysykhaniya kapli mnogokomponentnogo rastvora na tverdoy podlozhke [Qualitative analysis of patterns of drying of a drop of a multicomponent solution on a solid substrate], Zhurnal tekhnicheskoi fi ziki [Technical Physics], 2007, vol. 77, no. 2. pp. 17–21. URL: http://journals.ioffe. ru/articles/viewPDF/9047 (in Russ.)
- Faigl’ F., Anger V. Kapel’nyi analiz neorganicheskikh veshchestv [Drip Analysis of Inorganic Substances]. Moscow, Mir Publ., 1976, v. 1, 390 p., v. 2, 320 p. (in Russ.)
- Yakhno T. A., Kazakov V. V., Sanina O. A., Sanin A. G., Yakhno V. G. Kapli biologicheskikh zhidkostey, vysykhayushchie na tverdoy podlozhke: dinamika morfologii, massy, temperatury i mekhanicheskikh svoystv [Drops of biological fluids drying on a solid substrate: dynamics of morphology, mass, temperature, and mechanical properties]. Zhurnal tekhnicheskoi fi ziki [Technical Physics], 2010, v. 80(7), pp. 17–23. URL: http://journals.ioffe.ru/articles/viewPDF/10043 (in Russ.)
- Alfi mov M. V., Kadushnikov R. M., Shturkin N. A., Alievskii V. M., Lebedev-Stepanov P. V. Immitatsionnoe modelirovanie protsessov samoorganizatsii nanochastits [Simulation modeling of self-organization processes of nanoparticles], Rossiiskie nanotekhnologii [Nanotechnologies in Russia], 2006, v. 1(1–2), pp. 127–133. (in Russ.)
- Lebedev-Stepanov P. V., Gromov S. P., Molchanov S. P., Chernyshov N. A., Batalov I. S., Sazonov S. K., Lobova N. A., Shevchenko N. N., Men’shikova A. Yu., Alfimov M. V. Controlling the self-assemblage of modifi ed colloid particle ensembles in solution microdropletsRossiiskie nanotekhnologii [Nanotechnologies in Russia], 2011, v. 6(9–10), 569–578, pp. 72–78. https://doi.org/10.1134/S1995078011050119
- Andreeva L. V., Novoselova A. S., Lebedev-Stepanov P. V., Ivanov D. A., Koshkin A. V., Petrov A. N., Alfi mov M. V. Zakonomernosti kristallizatsii rastvorennykh veshchestv iz mikrokapli [Patterns of crystallization of dissolved substances from microdrops]. Zhurnal tekhnicheskoi fi ziki [Technical Physics], 2007, v. 77(2), pp. 22–30. URL: http://journals.ioffe.ru/articles/view-PDF/9048 (in Russ.)
- Barash L. Yu. Marangoni convection in an evaporating droplet: Analytical and numerical descriptions. International Journal of Heat and Mass Transfer, 2016, v. 102, pp. 445–454. https://doi.org/10.1016/j.ijh eatmasstransfer.2016.06.042 al
- Bityutskaya L. A., Zhukalin D. A., Tuchin A. V., Frolov A. A., Buslov V. A. Thermal dissipative structures in the case of carbon nanotubes aggregation in drying drops. Kondensirovannye sredy i mezhfaznye granitsy [Condensed Matter and Interphase], 2014, v. 16(4), pp. 425–430. URL: https://journals.vsu.ru/kcmf/ article/view/856/937 (in Russ.)
- Asakura S., Oosawa F. Interaction between particles suspended in solutions of macromolecules. Polymer Science Part A: General Papers, 1958, v. 33(126), pp. 183–192. https://doi.org/10.1002/pol.1958.1203312618
- Minton A. P. How can biochemical reactions within cells differ from those in test tubes? Journal of Cell Science, 2015, v. 119(14), pp. 2863–2869. https://doi.org/10.1242/jcs.03063
- Chebotareva N. A., Kurganov B. I., Livanova N. B. Biochemical effects of molecular crowding. Biohimija [Biochemistry], 2004, v. 69(11), pp. 1239–1251. https://doi.org/10.1007/s10541-005-0070-y
- Bishop K. J., Wilmer C. E., Soh S., Grzybowski B. A. Nanoscale forces and their uses in self-assembly. Small, 2009, v. 5(14), p. 1600–1630. https://doi.org/10.1002/smll.200900358
- Minton A. P. The infl uence of macromolecular crowding and macromolecular confi nement on biochemical reactions in physiological media. Journal of Biological Chemistry, v. 276(14), pp. 10577–10580. https://doi.org/10.1074/jbc.r100005200
- Huber F., Strehle D., Schnauss J., Kas J. Formation of regularly spaced networks as a general feature of actin bundle condensation by entropic forces. New J. Physics, 2015, v. 17(4), p. 043029. https://doi.org/10.1088/1367-2630/17/4/043029
- Jiang H., Wada H., Yoshinaga N., Sano M. Manipulation of colloids by a nonequilibrium depletion force in a temperature gradient. Physical Review Letters, 2009, v. 102(20), p. 208301. https://doi.org/10.1103/physrevlett.102.208301
- Deng H., Li G., Liu H. Assembling of three-dimensional crystals by optical depletion force induced by a single focused laser beam. Optics Express, 2012, v. 20(9), p. 9616. https://doi.org/10.1364/oe.20.009616
- Wulfert R., Seiferta U., Speck T. Nonequilibrium depletion interactions in active microrheology. Soft Matter, 2017, v. 13(48), p. 9093–9102. https://doi.org/10.1039/c7sm01737e
- Dolgih I. I., Bitutskaya L. A. Entropy driven aggregation of CNT in a drying drop on hydrophilic and hydrophobic substrate. Kondensirovannye sredy i mezhfaznye granitsy [Condensed Matter and Interphase], 2018, v. 20(4), p. 664–668. https://doi.org/10.17308/kcmf.2018.20/635