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Thermal bridging of graphene nanosheets via covalent molecular junctions: A non-equilibrium Green's functions-density functional tightbinding study

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Nano Research 2019年第4期12卷 791-799页

作者： Diego Martinez Gutierrez Alessa ndro Di Pierro Alessa ndro Pecchia Leon ardo Medra no San donas Rafael Gutierrez Mar Bernal Bohayra Mortazavi Gianaurelio Cuniberti Guido Saracco Alberto Fina Dipartimento di Scienza Applicata e Tecnologia Politecnico di Torino 15121 Alessandria Italy Consiglio Nazionale delle Ricerche ISMN 00017 Monterotondo Italy Institute for Materials Science and Max Bergmann Center of Biomaterials TU Dresden 01062 Dresden Germany Center for Advancing Electronics Dresden TU Dresden 01062 Dresden Germany Institute of Structural Mechanics Bauhaus- Universitat Weimar D-99423 Weimar Germany Dresden Center for Computational Materials Science TU Dresden 01062 Dresden Germany

Despite the uniquely high thermal conductivity of graphene is well known,the exploitation of graphene into thermally conductive nanomaterials and devices is limited by the inefficiency of thermal contacts between the individual nanosheets.A fascinating yet experimentally challenging route to enhance thermal conductance at contacts between graphene nanosheets is through molecular junctions,allowing covalently connecting nanosheets,otherwise interacting only via weak Van der Waals *** the bare existence of covalent connections,the choice of molecular structures to be used as thermal junctions should be guided by their vibrational properties,in terms of phonon transfer through the molecular *** this paper,density functional tight-binding combined with Green's functions formalism was applied for the calculation of thermal conductance and phonon spectra of several different aliphatic and aromatic molecular junctions between graphene *** of molecular junction length,conformation,and aromaticity were studied in detail and correlated with phonon tunnelling *** theoretical insight provided by this work can guide future experimental studies to select suitable molecular junctions,in order to enhance the thermal transport by suppressing the interfacial thermal *** is attractive for various systems,including graphene nanopapers and graphene polymer nanocomposites,as well as related *** a broader view,the possibility to design molecular junctions to control phonon transport currently appears as an efficient way to produce phononic devices and controlling heat management in nanostructures.

关键词： thermal conductance molecular junctions Green's functions density functional tight-binding (DFTB) graphene heat transport phonon transmission function

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Design Towards a Creative Industry for the Latin American Reality

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Journal of Literature and Art Studies 2013年第4期3卷 242-254页

作者： alej andra Elena Marinaro Romina Alicia Flores Universidad Maimonides Buenos Aires Argentina

The duty of educators and politicians is to find new policies and programs that should include creative industries such as designing, together with the teaching of new technologies to make it possible for a greater portion of the population to have access to this knowledge, which will enable it to be included in the job market. This type of training also means that the language of the educators will change .We need to develop a new multilinguistic, multimedia, and multidisciplinary conception oriented towards the learning activities of the student. Our goals is to transform multimedia design into an important creative industry in our region, we created ＂Project Untitled＂ at Universidad Maimonides. This is an artistic collective undertaking that includes teachers, directors, and students of the School of Multimedia Communication and Design. The goal of this project is to cooperate with learning paradigms in order to reach the quality that a true society of knowledge needs. Education is fundamental for the development of any nation, including the ＂periphery countries＂, which can contribute a different point of view, and which, in this sense, can offer wider possibilities, precisely because these countries have the ＂critical distance＂ that, probably, core countries are short of.

关键词： education interactive installations interactive design education digital art creativity human resources

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