This paper presents the development and market trends of nano biosensors. These biosensors must possess high sensitivity and selectivity to effectively detect diseases. Presently, many research groups are focusing on the field-effect transistor aspect of nano biosensors, which can identify diseases such as Down syndrome, bladder cancer, breast cancer, and numerous other cancers, utilizing graphene and transition metal dichalcogenide materials. In the case of in-vitro diagnostics, the use of nano biosensors has been rapidly growing since the onset of the COVID-19 pandemic. This paper also discusses market trends and the outlook for both national and international enterprises engaged in the nano biosensor field. Nano biosensors are expected to play a beneficial and significant role soon, contributing to the early diagnosis of diseases and subsequently improving patient outcomes.

This paper describes why we must use graphene materials for solar cells and biosensors. It has been superior in several properties such as super-thin film, higher tensile strength, high current density, high thermal conductivity, and high mobility. Therefore, graphene is one of the emerging advanced materials because of its applicability in various electronic device applications. We investigated the requirements of graphene materials for the application of solar cells and biosensors. In addition, we discussed the research trends such as transducers in biosensors and transparent electrodes in solar cells. The research on graphene materials and their application will be beneficial and helpful for the near future.

We fabricated the electrolyte-dielectric-metal (EDM) sensor on the base of AAO (anodicaluminum oxide) template with variation of the anodizing temperature. When a surface is immersed orcreated in an aqueous solution, a discontinuity is formed at the interface where such physicochemicalvariables as electrical potential and electrolyte concentration change significantly from the aqueous phaseto another phase. Because of the different chemical potentials between the two phases, charge separationoften occurs at the interfacial region [1]. This interfacial region, togeter with the charged surface, isusually known as the electrical double layer (EDL) [2]. The structural and electrochemical properties ofAAO sensor were investigated for applications in capacitive pH sensors. To change the thickness of theAAO template, the anodizing temperature was varied from 5℃ to 20℃, the thickness of the AAOtemplate invreased from 300 nm to 477 nm. The pH sensitivity of sensors with the anodizing temperatureof 20℃ showed the highest value of 56.4 mV/pH in the pH range of 3 to 11. The EDM sensor with theanodizing temperature of 20℃ exhibited the best long-term stability of 0.037 mV/h.