Highly ordered Ni–Ti–O nanotubes for non-enzymatic glucose detection

Microfabricated Ti/Ni electrodes for non-enzymatic glucose detection: Mechanistic insights and interference analysis in blood-mimicking conditions

Accurate glucose monitoring is essential for diabetes management, and while enzymatic sensors dominate the market, their limitations in stability and reliability under extreme conditions require alternative approaches. This study presents a non-enzymatic glucose sensor based on Ti/Ni electrodes fabricated via microfabrication techniques, designed to operate across a broad glucose concentration range (0-30 mM) and under physiological conditions. Electrochemical evaluations using cyclic voltammetry and chronoamperometry confirm the catalytic oxidation of glucose on Ni surfaces, demonstrating high sensitivity and selectivity. The sensor achieves a LoD of 1.29 mM, a LoQ of 3.93 mM, in alkaline solution. Interference analysis with common blood analytes such as uric acid, acetaminophen, and ascorbic acid, reveals that Ti/Ni electrodes outperform copper-based alternatives in minimizing cross-reactivity, meeting ISO 15197 standards for selectivity. Integrating NaOH-modified cellulose fibers for pH stabilization further supports the sensor's adaptability for in situ applications. These findings underscore the potential of Ti/Ni electrodes to enhance the development of stable, reliable, and non-enzymatic glucose sensors for clinical and wearable technologies.

Research progress on surface modification and coating technologies of biomedical NiTi alloys

NiTi alloys are an important class of biomaterials with extensive clinical applications such as cardiovascular stents, orthodontic arch-wires, esophageal stents, orthopedic implants and more. However, the long-term implantation of NiTi alloys presents significant challenges due to their susceptibility to wear, corrosion and the excessive release of harmful nickel ions. These factors can severely compromise both the biocompatibility and the overall service life of the implants. To better meet the demands for safety, durability and superior biological performance after implantation, surface modification of NiTi alloys has become a focal point of current research. Based on the fundamental properties of the NiTi alloys and the challenges encountered in their practical applications, this article provides a focused review of recent advances in improving their corrosion resistance, wear resistance, antibacterial properties and biological performance through surface modification and coating techniques. In addition, the paper outlines current research challenges and proposes recommendations for future development directions.

Highly sensitive and selective non-enzymatic monosaccharide and disaccharide sugar sensing based on carbon paste electrodes modified with perforated NiO nanosheets

Fabrication and characterization of enzyme-free electrochemical sensor for the sensing of monosaccharide and disaccharide sugars based on perforated NiO nanosheets (NSs).

Facile synthesis of Prussian blue nanocubes/silver nanowires network as a water-based ink for the direct screen-printed flexible biosensor chips

The large-scale fabrication of nanocomposite based biosensors is always a challenge in the technology commercialization from laboratory to industry. In order to address this issue, we have designed a facile chemical method of fabricated nanocomposite ink applied to the screen-printed biosensor chip. This ink can be derived in the water through the in-situ growth of Prussian blue nanocubes (PBNCs) on the silver nanowires (AgNWs) to construct a composite nanostructure by a facile chemical method. Then a miniature flexible biosensor chip was screen-printed by using the prepared nanocomposite ink. Due to the synergic effects of the large specific surface area, high conductivity and electrocatalytic activity from AgNWs and PBNCs, the as-prepared biosensor chip exhibited a fast response (<3s)， a wider linear response from 0.01 to 1.3mM with an ultralow LOD=5µm, and the ultrahigh sensitivities of 131.31 and 481.20µAmM^-1cm^-2 for the detections of glucose and hydrogen peroxide (H₂O₂), respectively. Furthermore, the biosensor chip exhibited excellent stability, good reproducibility and high anti-interference ability towards physiological substances under a very low working potential of -0.05. Hence, the proposed biosensor chip also showed a promising potential for the application in practical analysis.

Effect of oxygen plasma immersion ion implantation on the formation of nanostructures over Ni–Ti alloy

Ni–Ti alloy has been implanted with oxygen ions by plasma immersion ion implantation. Ni–Ti–O nanotubes are formed by anodic oxidation of oxygen implanted Ni–Ti alloy.