X ray photoelectron spectroscopy (XPS) analysis of Photosensitive ZrO2 array

Ultrahigh-Temperature Ceramic-Polymer-Derived SiOC Ceramic Composites for High-Performance Electromagnetic Interference Shielding

High-performance electromagnetic interference (EMI) shielding materials for a high-temperature harsh environment are highly required for electronics and aerospace applications. Here, a composite made of ultrahigh-temperature ceramic- and polymer-derived SiOC ceramic (PDC-SiOC) with high EMI shielding was reported for such applications. A total EMI shielding efficiency (SE_T) of 26.67 dB with a thickness of 0.6 mm at the Ka-band (26.5-40 GHz) was reported for ZrB₂ fabricated by spark plasma sintering, which showed reflection-dominant shielding. A unique interface of t-ZrO₂ was formed after the introduction of PDC-SiOC into ZrB₂. This interface has better electrical conductivity than SiOC. The composites also displayed reflection-dominant shielding. Accordingly, the composite with a normalized ZrB₂ fraction of 50% pyrolyzed at 1000 °C exhibited a significant SE_T of 72 dB (over 99.99999% shielded) with a thickness of 3 mm at the entire Ka-band. A maximum SE_T of 90.8 dB (over 99.9999999% shielded) was achieved with a thickness of 3 mm at around 39.7 GHz.

Microorganism@UiO-66-NH2 Composites for the Detection of Multiple Colorectal Cancer-Related microRNAs with Flow Cytometry

High-throughput analyses of multitarget markers can facilitate rapid and accurate clinical diagnosis. Suspension array assays, a flow cytometry-based analysis technology, are among some of the most promising multicomponent analysis methods for clinical diagnostics and research purposes. These assays are appropriate for examining low-volume, complex samples having trace amounts of analytes due to superior elimination of background. Physical shape is an important and promising code system, which uses a set of visually distinct patterns to identify different assay particles. Here, we presented a morphology recognizable suspension arrays based on the microorganisms with different morphologies. In this study, UiO-66-NH₂ (UiO stands for University of Oslo) metal-organic frameworks (MOFs), was wrapped on the microorganism surface to form an innovative class of microorganism@UiO-66-NH₂ composites for suspension array assays. The use of microorganisms endowed composites barcoding ability with their different morphology and size. Meanwhile, the UiO-66-NH₂ provided a stable rigid shell, large specific surface area, and metal(IV) ions with multiple binding sites, which could simplify the protein immobilization procedure and enhance detection sensitivity. With this method, simultaneous detection of three colorectal cancer-related microRNA (miRNA), including miRNA-21, miRNA-17, and miRNA-182, could be easily achieved with femtomolar sensitivity by using a commercial flow cytometer. The synergy between microorganisms and MOFs make the composites a prospective barcoding candidate with excellent characteristics for multicomponent analysis, offering great potential for the development of high throughput and accurate diagnostics.