Pixelated Micropolarizer Array Based on Carbon Nanotube Films

Abstract

A micropolarizer array (MPA) that can be integrated into a scientific camera is proposed as a real-time polarimeter that is capable of extracting the polarization parameters. The MPA is based on highly aligned carbon nanotube (CNT) films inspired by their typical anisotropy and selectivity for light propagation over a wide spectral range. The MPA contains a dual-tier CNT pixel plane with 0° and 45° orientations. The thickness of the dual-tier structure of the CNT-based MPA is limited to less than 2 μm with a pixel size of 7.45 μm × 7.45 μm. The degree of polarization of the CNT-MPA reached 93% at a 632 nm wavelength. The specific designs in structure and semiconductor fabrication procedures are described. Compared with customary MPAs, CNT-based MPA holds great potential in decreasing the cross-talk risk associated with lower film thickness and can be extended to a wide spectral range.

General Design Concept of High‐Performance Single‐Atom‐Site Catalysts for H2O2 Electrosynthesis

“…In recent years, researchers have been working on the development of new and efficient electrocatalysts for 2e − ORR and 2e − WOR. [26][27][28][29][30] Single-atom-site catalysts (SASCs) with isolated uniform active sites and adjustable structures have been successfully utilized in many fields. [31][32][33][34][35] For SASCs, the electronic structure of the metal atom can be regulated by modifying the surrounding microenvironment, and further changes the adsorption energy of the catalyst for oxygen-containing intermediates, which affects the 4e − /2e − ORR priority.…”