Synthesis and functionalization of graphene and application in electrochemical biosensing

AbstractGraphene is a two-dimensional material with amazing characteristics, which grant it the title “wonder material”. It has grabbed appreciable attention due to its exceptional electrical, optical, thermal, and mechanical properties. Because of these interesting properties, graphene has found its way into a wide variety of biosensing applications. It has been used as a transducer in electrochemical biosensors, bio-field-effect transistors, impedance biosensors, electrochemiluminescence, and fluorescence biosensors. Functionalization of graphene has further opened up novel fundamental and applied frontiers. The present article reviews recent works dealing with synthesis, functionalization of graphene, and its applications related to biosensors. Various synthesis strategies, mechanism and process parameters, and types of functionalization are discussed in view of biosensor development. Some potential areas for biosensor-related applications of functionalized graphene are highlighted, including catalytic biosensors and bio affinity biosensors. Wherever applicable, the limitations of the present knowledgebase and possible research directions have also been discussed.

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Construction of two-dimensional regression models of current-voltage characteristics of the output current of field-effect transistors using the information system PLExp

Izmeritel`naya Tekhnika ◽

10.32446/0368-1025it.2019-11-49-55 ◽

2019 ◽

pp. 49-55

Author(s):

N.Y. Baturina ◽

I.V. Kalienko

Keyword(s):

Information System ◽

Regression Models ◽

Field Effect ◽

Field Effect Transistors ◽

Two Dimensional ◽

Output Current ◽

Current Voltage ◽

Current Voltage Characteristics

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Polarization-sensitive photodetectors based on three-dimensional molybdenum disulfide (MoS2) field-effect transistors

Nanophotonics ◽

10.1515/nanoph-2020-0401 ◽

2020 ◽

Vol 9 (16) ◽

pp. 4719-4728

Author(s):

Tao Deng ◽

Shasha Li ◽

Yuning Li ◽

Yang Zhang ◽

Jingye Sun ◽

...

Keyword(s):

Molybdenum Disulfide ◽

Field Effect ◽

High Performance ◽

Field Effect Transistors ◽

Three Dimensional ◽

Polarized Light ◽

Optical Field ◽

Two Dimensional ◽

Polarization Ratio ◽

Two Dimensional Materials

AbstractThe molybdenum disulfide (MoS2)-based photodetectors are facing two challenges: the insensitivity to polarized light and the low photoresponsivity. Herein, three-dimensional (3D) field-effect transistors (FETs) based on monolayer MoS2 were fabricated by applying a self–rolled-up technique. The unique microtubular structure makes 3D MoS2 FETs become polarization sensitive. Moreover, the microtubular structure not only offers a natural resonant microcavity to enhance the optical field inside but also increases the light-MoS2 interaction area, resulting in a higher photoresponsivity. Photoresponsivities as high as 23.8 and 2.9 A/W at 395 and 660 nm, respectively, and a comparable polarization ratio of 1.64 were obtained. The fabrication technique of the 3D MoS2 FET could be transferred to other two-dimensional materials, which is very promising for high-performance polarization-sensitive optical and optoelectronic applications.

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