Related Papers
Biosensors
Trimetallic (aurod-pdshell-ptcluster) catalyst used as amperometric hydrogen peroxide sensor
2014 •
Yaw-Wen Yang
Bimetallic nanostructured core-shell structures are commonly used as catalysts in a wide variety of reactions. We surmised that the addition of an additional metal would potentially allow catalytic tailoring with the possibility of an increase in activity. Here a tri-metallic catalytic structure, consisting of clustered catalytic Pt on the surface of a Pd shell supported on a rod shaped Au core was fabricated. The significance of the additional metallic component is shown by comparative electrochemically active surface area (ECSA) analysis results for the trimetallic Aurod-Pdshell-Ptcluster, bimetallic Aurod-Ptcluster and monometallic JM-Pt (used as a reference), which have respective ECSA values (cm(2)/mgPt) of 1883.0, 1371.7 and 879. The potential utility of the trimetallic catalysts was shown in a hydrogen peroxide sensing protocol, which showed the catalyst to have a sensitivity of 604 ìA/mMcm(2) within a linear range of 0.0013-6.191 mM.
Chemical Reviews
Palladium-Based Nanomaterials: Synthesis and Electrochemical Applications
2015 •
Aicheng Chen
Biosensors
Low Platinum-Content Electrocatalysts for Highly Sensitive Detection of Endogenously Released H2O2
Marisa Nicolai
The commercial viability of electrochemical sensors requires high catalytic efficiency electrode materials. A sluggish reaction of the sensor’s primary target species will require a high overpotential and, consequently, an excessive load of catalyst material to be used. Therefore, it is essential to understand nanocatalysts’ fundamental structures and typical catalytic properties to choose the most efficient material according to the biosensor target species. Catalytic activities of Pt-based catalysts have been significantly improved over the decades. Thus, electrodes using platinum nanocatalysts have demonstrated high power densities, with Pt loading considerably reduced on the electrodes. The high surface-to-volume ratio, higher electron transfer rate, and the simple functionalisation process are the main reasons that transition metal NPs have gained much attention in constructing high-sensitivity sensors. This study has designed to describe and highlight the performances of the d...
Microchimica Acta
Advancements in electrochemical sensing of hydrogen peroxide, glucose and dopamine by using 2D nanoarchitectures of layered double hydroxides or metal dichalcogenides. A review
2019 •
Ayesha Aziz
Biotechnology advances
Nanomaterial based electrochemical sensors for in vitro detection of small molecular metabolites
2016 •
Lanting Qian
Small molecular metabolites secreted by pathological processes can act as molecular biomarkers for clinical diagnosis. In vitro detection of the metabolites such as glucose and reactive oxygen species is of great significance for precise screening, monitoring and prognosis of metabolic disorders and relevant diseases such as cancer, and has been under intense research and development in clinical chemistry and molecular diagnostics. In this review, we summarize recent developments in nanomaterial based electrochemical (bio)sensors for in vitro detection of glucose and reactive oxygen species and the progress in utilizing lightweight and flexible electrodes and micro/nanoscale electrodes for flexible and miniaturized sensors.
Sensors
Synthesis, Catalytic Properties and Application in Biosensorics of Nanozymes and Electronanocatalysts: A Review
Marina Nisnevitch
The current review is devoted to nanozymes, i.e., nanostructured artificial enzymes which mimic the catalytic properties of natural enzymes. Use of the term “nanozyme” in the literature as indicating an enzyme is not always justified. For example, it is used inappropriately for nanomaterials bound with electrodes that possess catalytic activity only when applying an electric potential. If the enzyme-like activity of such a material is not proven in solution (without applying the potential), such a catalyst should be named an “electronanocatalyst”, not a nanozyme. This paper presents a review of the classification of the nanozymes, their advantages vs. natural enzymes, and potential practical applications. Special attention is paid to nanozyme synthesis methods (hydrothermal and solvothermal, chemical reduction, sol-gel method, co-precipitation, polymerization/polycondensation, electrochemical deposition). The catalytic performance of nanozymes is characterized, a critical point of v...
Nano-Micro Letters
Nanozymes in Point-of-Care Diagnosis: An Emerging Futuristic Approach for Biosensing
natasha logan
Nanomaterial-based artificial enzymes (or nanozymes) have attracted great attention in the past few years owing to their capability not only to mimic functionality but also to overcome the inherent drawbacks of the natural enzymes. Numerous advantages of nanozymes such as diverse enzyme-mimicking activities, low cost, high stability, robustness, unique surface chemistry, and ease of surface tunability and biocompatibility have allowed their integration in a wide range of biosensing applications. Several metal, metal oxide, metal–organic framework-based nanozymes have been exploited for the development of biosensing systems, which present the potential for point-of-care analysis. To highlight recent progress in the field, in this review, more than 260 research articles are discussed systematically with suitable recent examples, elucidating the role of nanozymes to reinforce, miniaturize, and improve the performance of point-of-care diagnostics addressing the ASSURED (affordable, sens...
Journal of King Saud University - Science
Novel development of nanoparticles to bimetallic nanoparticles and their composites: A review
2017 •
Genene Mola
Biosensors
Nano-Engineered Surface Comprising Metallic Dendrites for Biomolecular Analysis in Clinical Perspective
Daphika S Dkhar
Metallic dendrites, a class of three-dimensional nanostructured materials, have drawn a lot of interests in the recent years because of their interesting hierarchical structures and distinctive features. They are a hierarchical self-assembled array of primary, secondary, and terminal branches with a plethora of pointed ends, ridges, and edges. These features provide them with larger active surface areas. Due to their enormous active areas, the catalytic activity and conductivity of these nanostructures are higher as compared to other nanomaterials; therefore, they are increasingly used in the fabrication of sensors. This review begins with the properties and various synthetic approaches of nanodendrites. The primary goal of this review is to summarize various nanodendrites-engineered biosensors for monitoring of small molecules, macromolecules, metal ions, and cells in a wide variety of real matrices. Finally, to enlighten future research, the limitations and future potential of the...
Journal of Applied Physics
A review of electrochemical glucose sensing based on transition metal phosphides
Nandakumar Kalarikkal
The alarming situation of the growing number of diabetic patients has called for a simple, sensitive, and selective glucose sensor that is also stable and user-friendly. In this report, we have reviewed the latest electrochemical sensing technology based on transition metal phosphides (TMPs) for glucose detection. Apart from the oxides, sulfides, nitrides, chalcogenides, etc., transition metal phosphides are less explored and have emerged as potential candidates for non-enzymatic glucose sensing applications. This review will help scientists and researchers to exploit relevant properties for glucose sensing applications, identify the best synthesis approaches to prepare transition metal phosphides, and provide information on the factors influencing glucose sensing and parameters to improve the performance and theoretical insights into the mechanism involved. Therefore, this review emphasizes a few methods adopted for tuning the properties of TMPs to achieve a stable glucose-sensing ...
