teslaA new, proof-of-concept graphene microphone is up to 32 times more sensitive than a standard, nickel-based one, and could potentially be upgraded to perform far into the ultrasonic part of the spectrum.


We demonstrate multilayer graphene microphones with a performance comparable to professional microphones. A microphone with a 60 layer graphene membrane displays up to 15 dB higher sensitivity compared to a commercial microphone, at frequencies up to 11 kHz. Finite element simulations confirm graphene microphone sensitivity and cutoff, and indicate that a microphone with a 300 layer graphene membrane would show similar sensitivity as state of the art condenser microphones, but with a frequency range extended up to 1 MHz, deeply entering the ultrasonic part of the spectrum.

Currently at GLAB we are developing a second generation of graphene microphones, with improved durability and integration into commercial packages. This work is an ongoing collaboration with the company Dirigent Acoustics.

Read more: Multilayer graphene condenser microphone
Todorović, D., Matković, A., Milićević, M., Jovanović, D., Gajić, R., Salom, I., Spasenović, M. 2D Materials, 2 (4), art. no. 045013, (2015) DOI: 10.1088/2053-1583/2/4/045013

tesla Liquid dispersion of graphene in low-boiling point organic solvent


We develope solution-processed dispersions of 2D materials such are graphene, MoS2, WS2, h-BN... Those are liquid dispersion of multi-layer sheets in various solvents (high-boiling point solvents and in low-boiling point solvents). Using LBA and LSA techinques we produce films on various substrates (Si/SiO2, glass, PET...) suitable for applications.

Read more: Enhanced sheet conductivity of Langmuir–Blodgett assembled graphene thin films by chemical doping
A. Matković, I Milošević, M Milićević, T Tomašević-Ilić, J Pešić, M Musić, M. Spasenović, Dj. Jovanović, B. Vasić, C. Deeks, R. Panajotović, M. Belić, R. Gajić
2D Materials 3 (1), 015002, (2016) DOI: 10.1088/2053-1583/3/1/015002

tesla LBA film of graphene made from liquid dispersion in low-boiling point organic solvent


We realized photovoltaic operation under variouse sun irradiation in LB/LS films from liquid phase exfoliated graphene by the formation heterojunction with n-Si. Under simulated sunlight irradiation, such as a heterojunction photovoltaic device achieves, a power conversion efficiency more than 5%, which is the higher efficiency among all solar cells based on solution-processed graphene dispersion. The results of these multilayer graphene films/Si-based solar cells hold the promise for integration of LB/LS films from liquid phase exfoliated 2D materials with commercially available Si-based electronics in highly efficient devices.



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