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In this work, we proposed a strategy that combined molecularly imprinted polymers (MIPs) and hybridization chain reaction into microfluidic paper-based analytical devices for ultrasensitive detection of target glycoprotein ovalbumin (OVA). During the fabrication, Au nanorods with a large surface area and superior conductibility were grown on paper cellulosic fiber as a matrix to introduce a boronate affinity sandwich assay. The composite of MIPs including 4-mercaptophenylboronic acid (MPBA) was able to capture target glycoprotein OVA. SiO2@Au nanocomposites labeled MPBA and cerium dioxide (CeO2)-modified nicked DNA double-strand polymers (SiO2@Au/dsDNA/CeO2) as a signal tag were captured into the surface of the electrode in the presence of OVA. An electrochemical signal was generated by using nanoceria as redox-active catalytic amplifiers in the presence of 1-naphthol in electrochemical assays. As a result, the electrochemical assay was fabricated and could be applied in the detection of OVA in the wide linear range of 1 pg/mL to 1000 ng/mL with a relatively low detection limit of 0.87 pg/mL (S/N = 3). The results indicated that the proposed platform possessed potential applications in clinical diagnosis and other related fields.

The development of next‐generation touch panels requires sensors that are highly sensitive, biocompatible, transparent, stretchable, self‐healing, and even anti‐freezing and self‐powered because the traditional touch panel based on stiff and brittle electrodes faces many challenges. Conductive hydrogels hold great promise as sensing materials for the new‐generation touch panel. However, most hydrogel‐based touch panels are developed based on single‐function gel materials with a lack of the anti‐freezing and self‐power capabilities. Herein, the authors demonstrate a multi‐functional surface‐capacitive touch panel based on a triboelectric nanogenerator with an instantaneous peak power density of 209 mW m−2 that uses zwitterionic network hydrogels as a highly transparent (98.1% transmittance), ultra‐stretchable (>11 500% strain), degradable, and flexible ionic conductor. The panel can be utilized as a human‐machine interactive interface with fast response, high resolution, low parasitic capacitance, functional recovery instantly upon damage, and without sacrificing its functionalities even in the high stretch state (1600% areal strain) and at the subzero environment (<−20 °C). Epidermal touch panels are operated on arbitrary and complex surfaces, with outstanding input property demonstrated by writing, and playing computer games. Simultaneously, the multifunctional touch panel is degradable in phosphate buffered saline solution, and no pollution is caused.

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As the increasing importance of human-machine interactions, stretchability, biocompatibility and self-healing behavior will play a more significant role in the next-generation touch panels so as to allow integration with a...

A novel separation‐free poly(N,N′-dimethylacrylamide)-titanium dioxide/copper sulfide (PDMAA-TiO2/CuS) hydrogel photocatalyst with the synergistic effect of adsorption and photocatalysis has been successfully developed by a facile two-step method involving a homogeneous polymerization...

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