Ultra-long silver nanowires (100–160 μm) were applied in flexible transparent conductive films showing low sheet resistance and high optical transmittance.

Noble metal single-atom catalysts (SACs) can provide maximized interaction with the reactants and tunable electronic structure dictated by the coordinated support, thus enabling unprecedented high activity at a reduced noble metal cost. However, the practical utilization of SACs that enabled heterogeneous catalysis has the bottlenecks in high manufacturing cost, low catalytic efficiency, and low atomic utilization of metals due to poor porosity of supporting structures, low affinity between SACs and supports, and high-temperature synthesis involved. A scalable and low-energy consumption synthesis of SACs strongly coordinated with an atomically designed 3D nanostructure is needed to realize higher catalytic efficiency and atomic utilization efficiency. Here, a facile synthesis strategy is developed by applying low-cost cerous MOF (Ce-MOF) with tailored defects across the porous and crystalline structure. SACs (Pt) synthesized by cryogenic photoreduction can be enclosed at the defects in Ce-MOF. Due to the uniform dispersion and the unique electronic hybridization with Ce-MOF, the conjugated catalyst with a low weight content of 0.12 wt % exhibited 100% conversion of CO at a low temperature of 150 °C, consuming only 10% of Pt required by state-of-the-art catalysts operating under the same conditions, standing as the most effective catalyst reported to date.

High aspect ratio silver nanowires (AgNWs) with ultra-long length and thin diameter were synthesized through bromine ion (Br−)-assisted one-step synthesis method. The bromine ions were used as pivotal passivating agent. When the molar ratio of Br−/Cl− was 1:4, the average diameter of AgNWs was as low as ~40 nm, the average length was as high as ~120 μm, and the aspect ratio reached 2500. Networks of AgNWs were fabricated using as-prepared high-quality AgNWs as conducting material and hydroxyethyl cellulose (HEC) as the adhesive polymer. As a result, a low sheet resistance down to ~3.5 Ω sq−1 was achieved with a concomitant transmittance of 88.20% and a haze of 4.12%. The ultra-low sheet resistance of conductive film was attributed to the long and thin AgNWs being able to form a more effective network. The adhesion of the AgNWs to the substrate was 0/5B (ISO/ASTM). The insights given in this paper provide the key guidelines for bromine ion-assisted synthesis of long and thin AgNWs, and further designing low-resistance AgNW-based conductive film for optoelectronic devices.