Early diagnosis of diseases is of great importance because it increases the chance of a cure and significantly reduces treatment costs Thus, development of rapid, sensitive, and reliable biosensing techniques is essential for the benefits of human life and health As such, various nanomaterials have been explored to improve performance of biosensors, among which, carbon dots (CDs) have received enormous attention due to their excellent performance In this Review, the recent advancements of CD-based biosensors have been carefully summarized First, biosensors are classified according to their sensing strategies, and the role of CDs in these sensors is elaborated in detail Next, several typical CD-based biosensors (including CD-only, enzymatic, antigen-antibody, and nucleic acid biosensors) and their applications are fully discussed Last, advantages, challenges, and perspectives on the future trends of CD-based biosensors are highlighted

Recent Developments of Carbon Dots in Biosensing: A Review.

One-dimensional wires are the most common building blocks in metamaterials. In this study, zero-dimensional nanoparticles connected by tunneling networks were used to construct metamaterials, thus providing a more flexible alternative for designing the geometrical configuration of metamaterials, particularly in nanodevices. The composites with nickel nanoparticles@MnO were prepared by a bio-gel derived strategy. Nickel nanoparticles were not connected geometrically, but the conductive network had been already formed, which was a tunneling-dominated percolative phenomenon demonstrated by the first-principles calculation. Negative permittivity was achieved in the composites, as the low-frequency plasmonic state could be generated in the tunneling nickel-networks. At the same time, negative susceptibility was observed due to the diamagnetism of the tunneling current loops. Electromagnetic simulations indicate that the composites have the potential for electromagnetic shielding (only 0.25 mm in thickness). It is believed that this study not only fills up the research gap in the influence of the tunneling effect on negative electromagnetic parameters but also opens up another way of preparing metamaterials by using zero-dimensional nanoparticles instead of one-dimensional wires.

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Tunneling-induced negative permittivity in Ni/MnO nanocomposites by a bio-gel derived strategy

N self-doped ZnO derived from microwave hydrothermal synthesized zeolitic imidazolate framework-8 toward enhanced photocatalytic degradation of methylene blue.

Multifunctions of Polymer Nanocomposites: Environmental Remediation, Electromagnetic Interference Shielding, And Sensing Applications

Self-Repairing and Damage-Tolerant Hydrogels for Efficient Solar-Powered Water Purification and Desalination

High-absorption solar steam device comprising Au@Bi2MoO6-CDs: extraordinary desalination and electricity generation

Integrated multifunctional device based on Bi2S3/Pd: Localized heat channeling for efficient photothermic vaporization and real-time health monitoring

Multi-3D hierarchical biomass-based carbon particles absorber for solar desalination and thermoelectric power generator

The invention relates to the field of materials, in particular to a photothermal conversion material, a preparation method thereof and a solar photothermal conversion device. The method comprises thefollowing steps of carrying out carrier nutrition, preparing a reaction liquid, growth reaction, and drying; the nutrition of the carrier comprises the following steps of soaking a carrier in a nutrient solution, wherein the nutrient solution component comprises sodium molybdate, thiourea and water, and carrier soaking and drying to obtain the nutrient carrier; the preparation of the reaction liquid comprises the following steps of dissolving sodium molybdate and thiourea in water to obtain the reaction liquid; and the growth reaction comprises the following steps of placing the nutrient carrier and the reaction solution in a reaction kettle, sealing and then placing in an oven for reaction to obtain a carrier for attaching the MoS2; and the drying comprises the following steps of cleaningthe carrier attached to the MoS2, and drying to obtain the photothermal conversion material. The method for preparing the photothermal conversion material is simple, low in cost and suitable for production, and the conversion efficiency of the prepared photothermal conversion material is high.

Hongyu Tu

Papers

High-absorption solar steam device comprising Au@Bi2MoO6-CDs: extraordinary desalination and electricity generation

Integrated multifunctional device based on Bi2S3/Pd: Localized heat channeling for efficient photothermic vaporization and real-time health monitoring

Multi-3D hierarchical biomass-based carbon particles absorber for solar desalination and thermoelectric power generator

Photothermal conversion material, preparation method thereof and solar photothermal conversion device