Porous Supramolecularly Templated Optical Resonators Built in 1D Photonic Crystals

Abstract

A synthetic route to attain photonic multilayers that presents controlled porosity only at the middle-layer level is shown. The spectral resonance associated with this porous layer shows strong sensitivity to the presence of vapors adsorbed or condensed within the void network, providing a potentially relevant material for gas detection. The importance of the interplay between pore and probe-molecule diameters is studied and its implications in size-selective detection are discussed.

1D photonic defect structures based on colloidal porous frameworks: Reverse pore engineering and vapor sorption

“…3a and b), a slight decrease in reflectivity is observed in comparison to the original BSs (gray lines). This observation is in accordance with top defect BSs coated with mesoporous TiO 2 [10], where sizeable effects on the spectrum by localization of defect modes in the stop band are only seen for very thick top layers, while embedded layers give rise to pronounced reflectance dips, irrespective of their thickness. Indeed, by adding more BLs to our heterostructures, we also observe the appearance of a reflectance dip in the stop band (blue lines in Fig.…”

Mesoporous Thin Films for Acoustic Devices in the Gigahertz Range

“…For the past 20 years, there has been a growing interest in mesoporous materials because of their high surface area of the order of 1000 m 2 /g, the precise control in the pore size and shape, pore arrangement, and tunable surface functionality. , In particular, mesoporous thin films obtained from soft chemistry methods present increasing interest as highly accessible materials with tunable structural, chemical, electronic, and optical properties that open the path to applications in fields such as sensing, environment, energy, and biomedicine. , The optical properties of mesoporous films are easily tunable through physical and chemical methods and are subject to change when exposed to the environment, which opens the field of responsive thin films acting as optical waveguides . Besides, complex architectures such as mesoporous multilayers can be processed as 1D photonic crystals or optical resonators with a selective optical response to vapors with different chemical properties or molecular size. ,, This application exemplifies that molecular, supramolecular, or photonic information can be encoded into the structure of a multilayer at several length scales or indeed combined with the plasmonic response . The extension of all these concepts into the nanoacoustic domain represents promising perspectives of this work.…”

Configurable 2D nano-flows in mesoporous films using paper patches

“…Our approach for creating paper/mesoporous lm hybrid devices affords attractive capabilities with respect to positioning target features in custom nanostructured frameworks, and offers the additional advantage that all structural components are inexpensive. Apart from the possibility for scalable mass production and the straightforward of exploiting nanopore functionalization [16][17][18][19] and connement, 20,21 our method could therefore enable novel applications that so far have not been amenable to current methods in paper-based microuidic. This heterogeneously integrated approach provide indeed synergetic functionalities to systems that could be important in various elds of application, including not only those suggested by the systems reported here but also others such as devices with integrated electronics, 22 chemical and biological sensor systems that incorporate unusual nanomaterials with conventional paper based microuidics, and photonic and optouidic porous silicon structures.…”