Study of the capacitive properties of molybdenum disulfide (MoS2) nanosheets aiming the development of biosensors

• Grant number: 18/04990-9
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: June 01, 2018
• End date: December 31, 2018
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Analytical Chemistry
• Principal Investigator: Cecilia de Carvalho Castro e Silva
• Grantee: Gustavo Arantes Lorga
• Host Institution: Instituto Mackenzie de Pesquisas em Grafeno e Nanotecnologias (Mackgraphe). Universidade Presbiteriana Mackenzie (UPM). Instituto Presbiteriano Mackenzie. São Paulo , SP, Brazil

Abstract

The transition metals dichalcogenides (TMDs) emerge as a new class of bidimensional materials with unique, extremely interesting chemical, electrical, biological and mechanical properties for the development of electrochemical biosensors. It's is highlighted the employment of the Molybdenum Disulfide (MoS2). MoS2 ¬nanosheets can presented both metallic and/or semiconductor character, according to its respective phase (1T and 2H, respectively). In its 2H phase currently being employed in the building of field effects transistors (FET), that, despite of its high electrochemical sensibility for the detection of biological species, they display a high complexity of building and stability. Therefore, this project proposes to evaluate the capacitive properties of films formed with MoS2 nanosheets in its 1T phase (metallic), aiming the development of highly sensitive, stable and with simplified architecture biosensors.