Our latest paper “Amorphized graphene: a stiff material with low thermal conductivity”  has been accepted for publication in Carbon.

In this work we show that amorphized graphene samples exhibit and unusual combination of high mechanical strength and low thermal conductivity.

The paper is available here.

We are organizing a school and workshop entitled “Thermal and Electronic Transport in Nanostructures”, which will take place at the International Institute of Physics – UFRN. The event will happen from  Monday, October 31, 2016 to Friday, November 11, 2016.

More information at the website: http://www.iip.ufrn.br/eventsdetail.php?inf===QTUFke

During this week the XXXIII Encontro de Físicos do Norte e Nordeste takes place in Natal. This is the second largest official event of the Brazilian Physical Society, and takes place every year in a different city within the North and Northeast regions of Brazil.

I am the Program Coordinator for this years edition, with my colleague Felipe Bohn as my  deputy. We had lot of work evaluating, categorizing and scheduling more than 600 presentations submitted by more than 1000 authors. We have also managed to bring together more than 25 invited speakers from all of Brazil and abroad. It’s all been worth it.

I am not presenting any works this year, but our group is represented with the following presentations.

12/11/2015 – Painéis (14:00-15:30) – EST – Física Estatística e Nanomateriais
P090 Transporte Térmico em Nanofios de SiGe
Raphael M. Tromer, Luiz F. C. Pereira

12/11/2015 – Comunicações Orais (16:00-18:00) – OTS – Ótica e Semicondutores
16:30 Estudo da Propagação de Luz em Multicamadas Dielétricas Quasiperiódicas Separadas por Grafeno
Carlos H. Costa, Luiz F. C. Pereira, Claudionor G. Bezerra

13/11/2015 – Comunicações Orais (16:00-18:00) – Sistemas Nanoestruturados
16:30 Controlando o tunelamento ressonante no grafeno pela velocidade de Fermi
Jonas R. F. Lima, Luiz F. C. Pereira, C. G. Bezerra
16:45 Transporte térmico em super-redes grafeno-nitreto de boro
Isaac de Macêdo Félix, Luiz F. C. Pereira

The XXXVIII Encontro Nacional de Física da Matéria Condensada will take place from 24 to 28/May/2015 in Foz do Iguaçu, in the state of Paraná, in the south of Brazil. This is the 38th edition of this traditional meeting organized by the Brazilian Physical Society. It is the largest physics meeting in Latin America, and second only to the APS March Meeting in the Americas. This year 4 Nobel Laureates will present plenary talks.

I will be presenting an invited talk entitled “Thermal transport in low-dimensional systems: the thermal conductivity of graphene” on 27/May in the session on Mechanical and Thermal Properties of Graphene and Related Systems.

It is a great honor to give an invited talk at this traditional event. I thank the program organizers for the opportunity.

Our first paper of 2014 “Length-dependent thermal conductivity in suspended single-layer graphene” has just been published in Nature Communications.

Graphene exhibits extraordinary electronic and mechanical properties, and extremely high thermal conductivity. Being a very stable atomically thick membrane that can be suspended between two leads, graphene provides a perfect test platform for studying thermal transport  in two-dimensional systems. In this work we report experimental measurements and non-equilibrium molecular dynamics simulations of thermal conduction in suspended single-layer graphene as a function of both temperature and sample length. Interestingly and in contrast to bulk materials, at 300 K,the  thermal conductivity keeps increasing and remains logarithmically divergent with sample length even for sample lengths much larger than the average phonon mean free path. This result is a consequence of the two-dimensional nature of phonons in graphene, and provides fundamental understanding of thermal transport in two-dimensional materials.

The work presented in this manuscript was carried out during my period as Postdoctoral Fellow in the group of Davide Donadio at the Max-Planck-Institut fur Polymerforschung in Mainz, in collaboration with colleagues at the Graphene Research Center in the National University of Singapore.

The paper is available here (open access).

Update: Our work has been covered by the media worldwide:
New research shows unlimited heat conduction in graphene – Nanowerk
Physicists show unlimited heat conduction in graphene – R&D
Je länger, desto wärmer – pro-physik.de
Physicists have demonstrated unlimited heat conduction in graphene – Science Alert – Australia & New Zealand
Physicists show unlimited heat conduction in graphene – Phys.org
Le graphène viole la loi de conduction de la chaleur de Fourier – Futura-Sciences
Graphene Could Absorb an Unlimited Amount of Heat – Gizmodo.

Update 2: We have also been featured in the bulletin of the Brazilian Physical Society.

Welcome to our page. We are the Thermal transport in nanostructures group at Universidade Federal do Rio Grande do Norte.