Insect-inspired nanofibrous polyaniline multi-scale films for hybrid polarimetric imaging with scattered light

Abstract

A two-dimensional monolayer multi-scaled polyaniline inverse opal film is fabricated and exhibits efficient polarization filtering, which separates s- and p-polarized light for polarization sensing and imaging.

Non-Line-of-Sight Full-Stokes Polarimetric Imaging with Solution-Processed Metagratings and Shallow Neural Networks

“…We fabricate the PANI-HS metagrating film based on prior work of inverse-opal nanostructures. 40 Since the volume of PANI nanowires on the hollow-sphere structure is doubled compared to the inverse opal structure, we observe an increase in the strength of the scattered light. The selection of PANI as the nanomaterial is another factor that increases the strength of the diffracted light because PANI has a higher transmissive efficiency than other conducting materials.…”

“…We fabricate the PANI-HS metagrating film based on prior work of inverse-opal nanostructures . Since the volume of PANI nanowires on the hollow-sphere structure is doubled compared to the inverse opal structure, we observe an increase in the strength of the scattered light.…”

“…Metagratings represent a different route to the design of regular metasurfaces and enable wavefront engineering with significantly lower fabrication demands. , The fabrication process of the PANI-HS metagrating film is efficient and cost-effective: PANI-HS is self-assembled and does not rely on sophisticated instruments or strict laboratory environments. We select polyaniline (PANI) as the nanomaterial because it is an attractive conducting polymer with high transmissive efficiency, high stability, low cost, and facile synthesis, , and has been employed as a reconfigurable material in multiple metasurface designs. , PANI has been shaped into various morphologies, including fibers, arrays, films, and a surface coating material. − Unlike previous reports, , the polarization response of the PANI-HS encoder does not require chiral molecular doping or alignment of the PANI molecules and is sensitive to both linear and circularly polarized light. The PANI-HS encoder exhibits a combination of local scattering and waveguided nonlocal interactions that enhance the spatial separation of orthogonal circularly polarized components …”

“…We select polyaniline (PANI) as the nanomaterial because it is an attractive conducting polymer with high transmissive efficiency, high stability, low cost, and facile synthesis, 38,39 and has been employed as a reconfigurable material in multiple metasurface designs. 40,41 PANI has been shaped into various morphologies, including fibers, arrays, films, and a surface coating material. 42−46 Unlike previous reports, 47,48 the polarization response of the PANI-HS encoder does not require chiral molecular doping or alignment of the PANI molecules and is sensitive to both linear and circularly polarized light.…”

The poor man’s trough: a bench top, motor-free method to 3D Langmuir-Blodgett films

“…There remains significant interest in the solution-processed deposition of monolayer films [1,2], including photonic crystal structures for smart sensing [3,4,5,6,7]. The inverse structures that are produced via the directed and templated assembly around such films also exhibit a range of intriguing light-matter interactions [1,3,8,9]. Photonic crystal films composed of colloids are often produced via the transfer of self-assembled films at the gas-liquid interface, well-known as Langmuir-Blodgett (LB) films [1,2].…”