Introduction Silica compounds are among the most extensively studied materials, especially those prepared by the sol−gel process [13]. A wide variety of proteins can catalyze the precipitation of silica and become encapsulated as the silica matrix forms. The reaction provides an efficient method for enzyme immobilization and provides significant mechanical stability to resulting silica matrix. ...

Abstrac t Biosensors are devices that detect and transmit information regarding a physiological change or the presence of various chemical or biological materials in a given environment. A new concept of electrochemical biosensors, directly related to the biological redox processes at the cellular and subcellular level, is proposed for testing microfluidic probes, in order to investigate and tr...

Various whole cell-based biosensors have been reported in the literature for the last 20 years and these reports have shown great potential for their use in the areas of pollution detection in environmental and in biomedical diagnostics. Unlike other reviews of this growing field, this mini-review argues that: (1) the selection of reporter genes and their regulatory proteins are directly linked...

Abstract—The beginning of 21st century has witnessed new advancements in the design and use of new materials for biosensing applications, from nano to macro, protein to tissue. Traditional analytical methods lack a complete toolset to describe the complexities introduced by living systems, pathological relations, discrete hierarchical materials, cross-phase interactions, and structure-property ...

This review describes recent advances in biosensors of potential clinical applications. Biosensors are becoming increasingly important and practical tools in pathogen detection, molecular diagnostics, environmental monitoring, food safety control as well as in homeland defense. Electrochemical biosensors are particularly promising toward these goals arising due to several combined advantages in...

Nanopores based on protein channels inserted into lipid membranes have paved the way towards a wide-range of inexpensive biosensors, especially for DNA sequencing. A key obstacle in using these biological ion channels as nanodevices is the poor stability of lipid bilayer membranes. Amphiphilic block copolymer membranes have emerged as a robust alternative to lipid membranes. While previous effo...

Based on biological molecules combined with nanostructured components, the news generations of electrochemical biosensors can employ different transducers (potentiometric, amperometric and impedimetric) converting the chemical information into a measurable amperometric signal. Following this contemporary theme, our main focus in this review is to discuss different methodologies for application ...

Biosensors have revolutionized the way of diagnosis by allowing detection of diseases at earlier stage & detection of altered amount of biomarkers in the body. All biosensors usually involve minimal sample preparation as the biological sensing component is highly selective for the analyte concerned. There are numerous biosensors available now-a-days such as electrochemical biosensors, optical b...

The objective of this study is to analyze the technical importance, performance, techniques, advantages, and disadvantages of the biosensors in general and of the electrochemical biosensors in particular. A product of reaction diffuses to the transducer in the first generation biosensors (based on Clark biosensors). The mediated biosensors or second generation biosensors use specific mediators ...

Cellulose is a group of materials that can be made into low-cost devices because they are the most common biomaterials in nature. Cellulose-based polymers flexible, biocompatible, biodegradable, and easy to functionalise mass produce. Cellulosic substrates attractive biosensing platforms their unique properties, exceptional simplicity, compatibility with standard technologies. Furthermore, cell...