In this study, we emphasised the anti-icing effects of the two-scale structure fabricated on Ecoflex thin film in several criteria for icephobic applications. The functional thin film was achieved by combining the low surface tension lubricant with a hierarchical structure, which was generated by the dry ion etching method. The anti-icing performance including adhesion strength, ice repellency, and durability was then compared with as-received substrate and non-slippery surface to demonstrate the superiority of two-scale texture in all mentioned criteria. The slippery hierarchical thin film exhibited outstanding performance with extremely low ice-surface adhesion strength, high ice repellency, and durability. This offers a new facile approach and proposed a unique design for icephobic applications such as wild shields, smart devices, cooling systems, and other outdoor equipment

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In this contribution we present an experimental study of 3D opal photonic crystals. The samples are opals constituted by colloidal silica spheres, realized with self-assembly technique. The sphere diameter is selected in order to obtain coupling of the photonic band gap with the emission from CdSe/ZnS colloidal quantum dots. The quantum dots infiltrated in the opals is expected to be enhanced or suppressed depending on the detection angle from the photonic crystal. The structural and optical characterization of the SiO2 opal photonic crystals are performed by field-emission scanning electron microscopy and reflectivity spectroscopy. Measurements performed on samples permits to put into evidence the influence of the different preparation methods on the optical properties. Study of self-activated luminescence of the pure opals is also presented. It is shown that the luminescence of the sample with QDs have original QD emission and not due to the photonic crystal structure. The optical properties of colloidal core-shell semiconductor quantum dots of CdSe/ZnS which are prepared in our lab will be mention.