Synthesis of Colloidal SU-8 Polymer Rods Using Sonication
| Autor: | Taiki Yanagishima, Carla Fernández-Rico, Arran Curran, Roel P. A. Dullens, Dirk G. A. L. Aarts |
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| Rok vydání: | 2018 |
| Předmět: |
chemistry.chemical_classification
Aqueous solution Materials science genetic structures Mechanical Engineering Sonication 02 engineering and technology Polymer 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Rod 0104 chemical sciences Colloid chemistry Optical tweezers Chemical engineering Mechanics of Materials Phase (matter) General Materials Science sense organs 0210 nano-technology Refractive index |
| Zdroj: | Advanced Materials |
| ISSN: | 1521-4095 |
| Popis: | The bulk synthesis of fluorescent colloidal SU‐8 polymer rods with tunable dimensions is described. The colloidal SU‐8 rods are prepared by shearing an emulsion of SU‐8 polymer droplets and then exposing the resulting non‐Brownian rods to ultrasonic waves, which breaks them into colloidal rods with typical lengths of 3.5–10 µm and diameters of 0.4–1 µm. The rods are stable in both aqueous and apolar solvents, and by varying the composition of apolar solvent mixtures both the difference in refractive index and mass density between particles and solvent can be independently controlled. Consequently, these colloidal SU‐8 rods can be used in both 3D confocal microscopy and optical trapping experiments while carefully tuning the effect of gravity. This is demonstrated by using confocal microscopy to image the liquid crystalline phases and the isotropic–nematic interface formed by the colloidal SU‐8 rods and by optically trapping single rods in water. Finally, the simultaneous confocal imaging and optical manipulation of multiple SU‐8 rods in the isotropic phase is shown. |
| Databáze: | OpenAIRE |
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