Electrospun carbon nanofibers (CNF) with surfaceanchored bimetallic gold−platinum nanoislands (CNFs@Au−Pt NIs) have been effectively developed by electrospinning and chemical reduction methods, and its enhanced trace-level hydrogen gas sensing characteristics at room temperature have been explored. Structural and morphological properties of the CNFs@platinum NIs (CNFs@Pt NIs) and CNFs@gold−platinum NIs (CNFs@ Au−Pt NIs) have been characterized using X-ray diffraction, transmission electron microscopy, and X-ray photoelectron spectroscopy analyses, which showed the successful formation of bimetallic Au−Pt NIs homogeneously distributed over the surface of CNFs. The bimetallic Au−Pt NIs on CNFs provide superior hydrogen gas sensing properties toward wide range detection of hydrogen gas from 0.01 to 4% under ambient conditions. Desorption of hydrogen from the nanohybrids without any delay is possible as the chemisorbed hydrogen on Pt has been compensated with the integration of Au on CNFs leading to rapid response and recovery time. Adsorption kinetics studies indicate that the adsorption of hydrogen occurs on active Au−Pt bimetallic sites because of the work function differences leading to changes in the resistance. In situ Raman spectroscopic analysis revealed the interaction of hydrogen (H 2 ) gas with the catalytic active NIs at room temperature, and a plausible mechanism has been proposed. This bimetallic catalyst functionalized CNFs can be considered as a potential candidate for the development of high-performance gas sensors with fast recovery and amplified response toward tracelevel hydrogen gas for real time applications.

A highly stable conducting nanoink based on silver ultra-long nanowires (Ag ULNWs) was developed by a self-seeding polyol method with controlled doping of silver acetate for flexible electronics applications.

Porous n–p type ultra-long ZnO@Bi2O3 heterojunction nanorods have been synthesized through a solvothermal method and their complex charge transport characteristics pertaining to NO2 gas sensing properties have been investigated.

Flexible electronic gas sensors working at room temperature have acquired enormous attention in recent years due to their suitability to be integrated into various wearable electronic products. In this investigation, we have demonstrated a H 2 gas sensor using less platinum bimetallic nickel−platinum nanocatalyst-functionalized carbon nanofibers (CNFs@Ni−Pt) fabricated on a flexible platform. The flexible CNF@Ni−Pt sensor showed only a negligible decrease in response during mechanical stress under flat (21%) and bent (17%) states after several bending cycles owing to the high aspect ratio of the carbon nanofiber network, which helps us to indulge a long bending path. Moreover, the flexible CNF@Ni−Pt sensor showed superior sensor response (50%) toward H 2 with outstanding selectivity toward other interfering gases. In addition, hydrogen adsorption kinetic studies performed on flexible CNF@Ni−Pt sensors indicated comparable theoretically calculated (0.42) and experimental (0.49) rate constant values. In situ Raman spectroscopy analysis aided in unraveling the H 2 interaction with the catalytically active Ni−Pt sites anchoring on the surface of CNFs, and a plausible sensing mechanism could be predicted. Flexible, less platinum CNF@Ni−Pt sensors can find wider applications in the fields of flexible electronics, biomedical, and environmental monitoring.

Production and alignment of heterojunction metal oxide semiconductor nanomaterials-based sensing elements for microsensor devices has always posed fabrication challenges since it involves multi-step synthesis processes. Herein, we demonstrate a coaxial...

The central nervous system, one of the most delicate microenvironments of the body, is protected by the blood-brain barrier regulating its homeostasis. Blood-brain barrier is a highly complex structure that tightly regulates the movement of ions of a limited number of small molecules and of an even more restricted number of macromolecules from the blood to the brain, protecting it from injuries and diseases. However, the blood-brain barrier also significantly precludes the delivery of drugs to the brain, thus, preventing the therapy of a number of neurological disorders. As a consequence, several strategies are currently being sought after to enhance the delivery of drugs across the blood-brain barrier. Within this review a brief description of the structural and physiological features of the barriers and the recently born strategy of brain drug delivery based on the use of nanoparticles are described. Finally, the future technological approaches are described. The strong efforts to allow the translation from preclinical to concrete clinical applications are worth the economic investments.

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Aligned 1D heterojunction carbon nanofibers have been developed, which possess exceptional properties like high surface-to-volume ratio and excellent direct electron transport properties favouring their hydrogen sensing properties.