A novel and sensitive Cu2ZnSnS4 quantum dot–based non–enzymatic glucose sensor

High-Performance Three-Dimensional Spongin–Atacamite Biocomposite for Electrochemical Nonenzymatic Glucose Sensing

“…CV measurements were employed to evaluate the catalytic performance of the fabricated electrodes toward glucose oxidation. As known, the nonenzymatic electrocatalytic oxidation of glucose is a pH-dependent process, and a highly alkaline medium improves the efficiency of the fabricated sensor. ,, Moreover, according to previous reports, the concentration of OH – affects the glucose oxidation reaction, and a 0.1 M NaOH (pH = 13) solution has been suggested as the optimal concentration to obtain relatively higher oxidation current. ,, Therefore, a 0.1 M NaOH solution was chosen for further electrochemical investigations. CV curves of bare CPE, Sp.A./CPE, and St.A./CPE were recorded in 0.1 M NaOH solution without and with 2 mM glucose (Figure B).…”

“…On the basis of data from the World Health Organization (WHO) and the International Diabetes Federation, it is expected that the population of people with diabetes will double by the year 2045. , Therefore, careful management of diabetes can prevent acute complications and delay the progression of diabetes. Besides clinical diagnostics, quantification of glucose in other fields (e.g., the food and beverage industry, biotechnology, environmental protection, and agriculture) is also of great importance. , Among different techniques for glucose detection, electrochemical (bio)­sensors have attracted extensive attention as promising choices due to their superior features like low cost, simplicity, user convenience, fast response, and point-of-care detection capability. , Up to now, most of the glucose biosensors have been developed based on the immobilization of glucose oxidase and/or glucose dehydrogenase enzymes on a suitable substrate. − Moreover, about 85% of the commercially available glucose biosensors are enzymatic electrochemical based sensors, which have advantages such as sensitivity and selectivity. ,, However, enzyme-based sensors suffer from some drawbacks including a complex and expensive enzyme purification process, low stability due to enzyme denaturation, and decreasing enzyme activity during the complicated immobilization steps. , In contrast, enzymeless electrochemical glucose sensors based on direct electrooxidation of glucose have become a research hot spot due to their low cost, simplicity, stability, easy modification, and, more importantly, freedom from oxygen limitations. , It is noticeable that the sensing material as the electrocatalyst has a significant role in designing nonenzymatic glucose sensors. Therefore, the development of efficient electrode materials with excellent catalytic activity, large surface area, and desirable morphology, size, shape, and composition is an essential factor in the construction of nonenzymatic glucose sensors. ,, Nanomaterials of carbon (like graphene, carbon nanotubes, boron-doped diamond), − metals (Au, Zn, Ni, Cu, Pd), ,, metal oxides (ZnO, CuO), , alloys (PtPb, AuNi, NiNb), , and composites (carbon nanotubes/CuFe 2 O 4 , graphene oxide/Pd) , have been widely utilized as electrocatalysts in nonenzymatic glucose sensing.…”

“…Besides clinical diagnostics, quantification of glucose in other fields (e.g., the food and beverage industry, biotechnology, environmental protection, and agriculture) is also of great importance. 3,4 Among different techniques for glucose detection, electrochemical (bio)sensors have attracted extensive attention as promising choices due to their superior features like low cost, simplicity, user convenience, fast response, and point-of-care detection capability. 5,6 Up to now, most of the glucose biosensors have been developed based on the immobilization of glucose oxidase and/or glucose dehydrogenase enzymes on a suitable substrate.…”

Electrospun nanofiber-based glucose sensors for glucose detection

“…Quantum dots (QDs) are inorganic nanocrystals (NCs) that can be prepared by atoms from groups of II-VI, III I or IV-VI in the periodic table, and belong to 0D NMs ( Zhou et al, 2021 ). They have unique photophysical properties, such as strong photostability, high brightness, and high signalability ( Ramanavicius et al, 2021 ).…”

The latest trends in the design of electrochemical biosensors for the diagnosis and monitoring of diabetes mellitus

“…Quantum dots on Nafion binder and fluorine-doped tin oxide glass as supporting substrates were fabricated as nonenzymatic glucose oxidizing catalysts in the work of Zhou and co-authors (2021). Farid and co-workers (2021) prepared porous cobalt telluride nanosheets as an active catalyst for glucose detection (21,22).…”