Multifunctional optoelectrical sensor based on two-dimensional MoS2 atomically thin layers grown by selective nucleation


Project Director: Dr. Toma Stoica

Title: “Multifunctional optoelectrical sensor based on two-dimensional MoS2 atomically thin layers grown by selective nucleation

Acronym: 2Doptosens

Project ID: PN-III-P2-2_1-PED-2021-2457

Project Director: Dr. Toma Stoica

Project Type: National

Program: Program 4 – Basic and Frontier Research: Complex Projects of Frontier Research

Funding Agency: Unitatea Executiva pentru Finantarea Invatamantului Superior, a Cercetarii, Dezvoltarii si Inovarii - UEFISCDI

Contractor: NATIONAL INSTITUTE OF MATERIALS PHYSICS (INSTITUTUL NATIONAL DE CERCETARE - DEZVOLTARE PENTRU FIZICA MATERIALELOR)

Status: In progress

Starting Date: 24/06/2022

Ending Date: 23/06/2024

Summary:

Optoelectrical multifunctional sensors will be obtained based on selective nucleation and growth of two-dimensional 2D-MoS2 atomically thin layers on SiO2/Si patterned substrates, by using Physical Vapor Deposition method. The substrate patterning will be performed by deposition of Mo pads before growth of MoS2 flakes. The precise localization of selectively grown 2D-MoS2 flakes allows the fabrication of the optoelectrical sensors by deposition of metallic contacts using photolithographic technique with alignment to the patterns of the substrate. The atomically thin 2D-MoS2 layers are very sensitive to external excitation as for example light illumination or adsorbed molecules on the 2D-MoS2 free layer surface. Using the Si substrate as gate electrode, the (photo)sensitivity of the device can be controlled and enhanced by field effect. Based on the high sensitivity expressed by electric and photoelectric behaviour, the 2D-MoS2 optoelectrical sensors are recommended for many practical applications, as for example biosensors (protein detection, DNA compatibility, acetone in human breath for diabetes, etc) and chemical sensors for pollution monitoring. The validation of the optoelectrical sensor demonstrator in this project according to TRL 3 includes the testing experiments on spectral photocurrent, as well as on electrostatic doping in 2D-MoS2 layers by field effect and adsorbed acetone molecules.

Dr. Toma Stoica
Dr. Ciurea Lidia Magdalena
Dr. Ionel Stavarache
Dr. Adrian Slav
Dr. Ana-Maria Lepadatu
Dr. Elena Matei
Dr. Catalin Palade
Dr. Ioana Maria Avram Dascalescu
PhD Student Ovidiu Cojocaru

Project Contact Person:

Project Director:  Dr.Toma Stoica

National Institute of Materials Physics, Atomistilor 405A., 077125 Magurele - Bucharest, ROMANIA

Tel:+40--(0)21-2418-171

Email: toma.stoica@infim .ro


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