ABSTRACT
The imperative usage of biosensors in several applications, like biomedical, clinical analysis, food industry, defense, safety, environmental monitoring, etc., has led to significant importance and demand to fabricate them. These are electrochemical sensors, wherein the detection of analyte takes place due to a reaction between biomolecules like enzymes, antibodies, protein, cell, aptamers, peptides, nucleotides, etc. (biological entity) and the analytes. This interaction is amplified and converted into a measurable signal output with the aid of a transducer. The biological moieties have to be entrapped in compatible matrixes like carbons, metals, oxides, and polymer-based materials and their composites. However, these materials have proven to be great when used in bulk volume biosensors. These bulk sensors are non-potable; hence, are difficult for practical application. To overcome this, biosensors based on printed, flexible electronics have attracted researchers lately. The printing approach has received considerable interest as a technique for realizing low-cost, simple, portable biosensors. In the context of printable and flexible electronics-based biosensors, often materials show various limitations; thus, they are structurally engineered. The present chapter gives an overview of the emerging materials, their fabrication, and recent advances in biosensors based on printed electronics. Further, this chapter discusses the future aspects and plausible applications.
