| 초록 |
Sensor technology based on electronic circuits has led the current IoT world. However, the conventional sensor platform is inadequate for analysis of microenvironment. Here, we design photonic-crystal-laden microcapsules to make a new sensor platform. The microcapsules are produced to have a hollow core and solid shell using w/o/w double-emulsion drops. In the core, stimuli-responsive colloids are assembled to have hexagonal close-packed (hcp) lattice through depletion attraction. In the close-packed array, the volume change of individual colloids fully influences the change of lattice constant, leading to a wide stopband shift. The fragile colloidal crystals in the core are completely isolated from surrounding by a solid shell, providing high stability against external mechanical stress. The photonic capsule sensors are injectable, suspendable, and implantable, which renders them promising for in-situ monitoring of microenvironment condition and its distribution. |
