Porous nanosheet-based ZnO microspheres for the construction of direct electrochemical biosensors

Nanostructured Metal Oxides Based Enzymatic Electrochemical Biosensors

“…The biosensor have linear response in a wide concentration rang 1.5×10 −5 to 1.1×10 −3 M and detection limit is 9.0×10 −6 M (Xiang et al, 2009). Lu et al, (2008) have developed porous nanosheet-based ZnO microspheres for the construction of direct electrochemical H 2 O 2 b i o s e n s o r . I n t h i s c o n t e x t , p o r o u s Z n O nanosheet permit a direct electron transfer between redox proteins and bulk electrode materials, allowing electrochemical sensing to be performed without using electron-transfer mediator.…”

Efficient detection of cholesterol using ZnO thin film based matrix

“…A variety of materials such as metal oxides, self-assembled monolayers, conducting polymers and nanocomposites has been used as matrix to enhance the electron transfer rate and to obtain good stability of biomolecule. Among these semiconducting metal oxides owing to high ionic conductivity, capacitive action, catalytic properties and high isoelectric point have gained considerable interest in the field of biosensors [7,9,10].…”

Advances of Nanotechnology Applied to Biosensors

“…Nanosheet-based ZnO microsphere with porous nanostructures was synthesized by a facile chemical bath deposition method followed by thermal treatment, which was explored for the construction of electrochemical biosensors [35]. It has been found that the waxberrylike ZnO balls acted as excellent materials for immobilization of HRP and rapid electron transfer agent for the fabrication of efficient biosensors due to their high electron conductivity, large surface area, increased oxygen vacancies, and good biocompatibility [36].…”