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Articles, 23 registres trobats
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Articles 23 registres trobats  1 - 10següentfinal  anar al registre:
1.
33 p, 4.8 MB Heat transport control and thermal characterization of low-dimensional mMaterials : a review / Sachat, Alexandros el (Institut Català de Nanociència i Nanotecnologia) ; Alzina, Francesc (Institut Català de Nanociència i Nanotecnologia) ; Sotomayor Torres, Clivia M. (Institut Català de Nanociència i Nanotecnologia) ; Chávez Ángel, Emigdio (Institut Català de Nanociència i Nanotecnologia)
Heat dissipation and thermal management are central challenges in various areas of science and technology and are critical issues for the majority of nanoelectronic devices. In this review, we focus on experimental advances in thermal characterization and phonon engineering that have drastically increased the understanding of heat transport and demonstrated efficient ways to control heat propagation in nanomaterials. [...]
2021 - 10.3390/nano11010175
Nanomaterials, Vol. 11, issue 1 (Jan. 2021) , art. 175  
2.
Large thermoelectric power variations in epitaxial thin films of layered perovskite GdBaCo2O5.5±δwith a different preferred orientation and strain / Chatterjee, Arindom (Institut Català de Nanociència i Nanotecnologia) ; Chávez Ángel, Emigdio (Institut Català de Nanociència i Nanotecnologia) ; Ballesteros, Belén (Institut Català de Nanociència i Nanotecnologia) ; Caicedo Roque, Jose Manuel (Institut Català de Nanociència i Nanotecnologia) ; Padilla-Pantoja, Jessica (Institut Català de Nanociència i Nanotecnologia) ; Leborán, Víctor (Universidade de Santiago de Compostela. Departamento de Química-Física) ; Sotomayor Torres, Clivia M. (Institut Català de Nanociència i Nanotecnologia) ; Rivadulla, Francisco (Universidade de Santiago de Compostela. Departamento de Química-Física) ; Santiso, José (Institut Català de Nanociència i Nanotecnologia)
This work describes the growth of thin epitaxial films of the layered perovskite material GdBaCoO(GBCO) on different single crystal substrates SrTiO(STO), (LaAlO)(SrTaAlO)(LSAT) and LaAlO(LAO) as an approach to study changes in the thermoelectric properties by means of the induced epitaxial strain. [...]
2020 - 10.1039/d0ta04781c
Journal of materials chemistry, Vol. 8, issue 38 (Oct. 2020) , p. 19975-19983  
3.
12 p, 5.0 MB Phonon bridge effect in superlattices of thermoelectric tinisn/hfnisn with controlled interface intermixing / Heinz, Sven (Johannes Gutenberg University. Institute of Physics) ; Chávez Ángel, Emigdio (Institut Català de Nanociència i Nanotecnologia) ; Trapp, Maximilian (Darmstadt University of Technology. Institute of Applied Geosciences) ; Kleebe, Hans-Joachim (Institut Català de Nanociència i Nanotecnologia) ; Jakob, Gerhard (Johannes Gutenberg Universität Mainz. Graduate School of Excellence Materials Science)
The implementation of thermal barriers in thermoelectric materials improves their power conversion rates effectively. For this purpose, material boundaries are utilized and manipulated to affect phonon transmissivity. [...]
2020 - 10.3390/nano10061239
Nanomaterials, Vol. 10, issue 6 (June 2020) , art. 1239  
4.
11 p, 1.5 MB Enhancement of thermal boundary conductance of metal-polymer system / Sandell, Susanne (Norwegian University of Science and Technology. Department of Structural Engineering) ; Maire, Jeremie (Institut Català de Nanociència i Nanotecnologia) ; Chávez Ángel, Emigdio (Institut Català de Nanociència i Nanotecnologia) ; Sotomayor Torres, Clivia M. (Institut Català de Nanociència i Nanotecnologia) ; Kristiansen, Helge (Norwegian University of Science and Technology. Department of Structural Engineering) ; Zhang, Zhiliang (Norwegian University of Science and Technology. Department of Structural Engineering) ; He, Jianying (Norwegian University of Science and Technology. Department of Structural Engineering)
In organic electronics, thermal management is a challenge, as most organic materials conduct heat poorly. As these devices become smaller, thermal transport is increasingly limited by organic-inorganic interfaces, for example that between a metal and a polymer. [...]
2020 - 10.3390/nano10040670
Nanomaterials, Vol. 10, issue 4 (April 2020) , art. 670  
5.
6 p, 1.6 MB A novel contactless technique for thermal field mapping and thermal conductivity determination : two-laser Raman thermometry / Reparaz, Juan Sebastian (Institut Català de Nanociència i Nanotecnologia) ; Chávez Ángel, Emigdio (Universitat Autònoma de Barcelona. Departament de Física) ; Wagner, Markus R. (Institut Català de Nanociència i Nanotecnologia) ; Graczykowski, Bartlomiej (Institut Català de Nanociència i Nanotecnologia) ; Gomis Bresco, Jordi (Institut Català de Nanociència i Nanotecnologia) ; Alzina, Francesc (Institut Català de Nanociència i Nanotecnologia) ; Sotomayor Torres, Clivia M. (Institut Català de Nanociència i Nanotecnologia)
We present a novel contactless technique for thermal conductivity determination and thermal field mapping based on creating a thermal distribution of phonons using a heating laser, while a second laser probes the local temperature through the spectral position of a Raman active mode. [...]
2014 - 10.1063/1.4867166
Review of Scientific Instruments, Vol. 85, issue 3 (March 2014) , art. 34901  
6.
13 p, 281.1 KB Modification of Akhieser mechanism in Si nanomembranes and thermal conductivity dependence of the Q-factor of high frequency nanoresonators / Chávez Ángel, Emigdio (Universitat Autònoma de Barcelona. Departament de Física) ; Zarate, R.A. (Universidad Católica del Norte. Departamento de Física) ; Gomis Bresco, Jordi (Institut Català de Nanociència i Nanotecnologia) ; Alzina, Francesc (Institut Català de Nanociència i Nanotecnologia) ; Sotomayor Torres, Clivia M. (Institut Català de Nanociència i Nanotecnologia)
We present and validate a reformulated Akhieser model that takes into account the reduction of thermal conductivity due to the impact of boundary scattering on the thermal phonons' lifetime. We consider silicon nanomembranes with mechanical mode frequencies in the GHz range as textbook examples of nanoresonators. [...]
2014 - 10.1088/0268-1242/29/12/124010
Semiconductor Science and Technology, Vol. 29, issue 12 (Dec. 2014) , art. 124010  
7.
16 p, 190.5 KB Synthesis and optical characterization of Er-doped bismuth titanate nanoparticles grown by sol-gel hydrothermal method / Fuentes, Sandra (Centro para el Desarrollo de la Nanociencia y la Nanotecnología (Chile)) ; Muñoz, Pamela (Universidad Católica del Norte) ; Llanos, Jaime (Universidad Católica del Norte) ; Vega, Mauricio (Universidad Católica del Norte) ; Martin, Inocencio R. (Universidad de La Laguna) ; Chávez Ángel, Emigdio (Institut Català de Nanociència i Nanotecnologia)
The Er-doped bismuth titanate (BiTiO, BIT) nanoparticles were synthesized by a combined sol-gel and hydrothermal method under a partial oxygen pressure of 30 bar. The composition and morphology were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and Raman scattering. [...]
2017 - 10.1016/j.ceramint.2016.11.200
Ceramics international, Vol. 43, Issue 4 (March 2017) , p. 3623-3630  
8.
7 p, 2.1 MB Enhanced thermoelectric properties of lightly Nb doped SrTiO3 thin films / Bhansali, Sweta (Institut Català de Nanociència i Nanotecnologia) ; Khunsin, Worawut (Institut Català de Nanociència i Nanotecnologia) ; Chatterjee, Arindom (Institut Català de Nanociència i Nanotecnologia) ; Santiso, José (Institut Català de Nanociència i Nanotecnologia) ; Abad, B. (Instituto de Microelectrónica de Madrid) ; Martín González, Marisol (Instituto de Microelectrónica de Madrid) ; Jakob, G. (Johannes Gutenberg-Universität Mainz. Institut für Physik) ; Sotomayor Torres, Clivia M. (Institut Català de Nanociència i Nanotecnologia) ; Chávez Ángel, Emigdio (Institut Català de Nanociència i Nanotecnologia)
Novel thermoelectric materials developed for operation at room temperature must have similar or better performance along with being as ecofriendly as those commercially used, e. g. , BiTe, in terms of their toxicity and cost. [...]
2019 - 10.1039/c9na00361d
Nanoscale advances, Vol. 1, Issue 9 (September 2019) , p. 3647-3653  
9.
33 p, 1.2 MB 2D Phononic Crystals : Progress and Prospects in Hypersound and Thermal Transport Engineering / Sledzinska, Marianna (Institut Català de Nanociència i Nanotecnologia) ; Graczykowski, Bartlomiej (Max Planck Institute for Polymer Research) ; Maire, Jeremie (Institut Català de Nanociència i Nanotecnologia) ; Chávez Ángel, Emigdio (Institut Català de Nanociència i Nanotecnologia) ; Sotomayor Torres, Clivia M. (Institut Català de Nanociència i Nanotecnologia) ; Alzina, Francesc (Institut Català de Nanociència i Nanotecnologia)
The central concept in phononics is the tuning of the phonon dispersion relation, or phonon engineering, which provides a means of controlling related properties such as group velocity or phonon interactions and, therefore, phonon propagation, in a wide range of frequencies depending on the geometries and sizes of the materials. [...]
2020 - 10.1002/adfm.201904434
Advanced functional materials, Vol. 30, Issue 8 (February 2020) , art. 1904434  
10.
11 p, 3.2 MB From thermal to electroactive graphene nanofluids / Rueda García, Daniel (Institut Català de Nanociència i Nanotecnologia) ; Rodríguez Laguna, María del Rocío (Institut Català de Nanociència i Nanotecnologia) ; Chávez Ángel, Emigdio (Institut Català de Nanociència i Nanotecnologia) ; Dubal, Deepak P. (Institut Català de Nanociència i Nanotecnologia) ; Cabán Huertas, Zahilia (Institut Català de Nanociència i Nanotecnologia) ; Benages Vilau, Raúl (Institut Català de Nanociència i Nanotecnologia) ; Gómez Romero, Pedro 1959- (Institut Català de Nanociència i Nanotecnologia)
Here, we describe selected work on the development and study of nanofluids based on graphene and reduced graphene oxide both in aqueous and organic electrolytes. A thorough study of thermal properties of graphene in amide organic solvents (N,N-dimethylformamide, N,N-dimethylacetamide, and N-methyl-2-pyrrolidone) showed a substantial increase of thermal conductivity and specific heat upon graphene integration in those solvents. [...]
2019 - 10.3390/en12234545
Energies, Vol. 12, Issue 23 (December 2019) , art. 4545  

Articles : 23 registres trobats   1 - 10següentfinal  anar al registre:
Llibres i col·leccions 1 registres trobats  
1.
4 p, 239.4 KB On the Enhancement of the Thermal Conductivity of Graphene-Based Nanofluids / Rodríguez Laguna, María del Rocío (Institut Català de Nanociència i Nanotecnologia) ; Sotomayor Torres, Clivia M. (Institut Català de Nanociència i Nanotecnologia) ; Gómez Romero, Pedro 1959- (Institut Català de Nanociència i Nanotecnologia) ; Chávez Ángel, Emigdio (Institut Català de Nanociència i Nanotecnologia)
Heat transfer fluids have been extensively used in both low-temperature and high temperature applications (e. g. microelectronics cooling and concentrated solar power). However, their low thermal conductivity is still a limit on performance. [...]
Cork : IEEE, 2018 (Proceedings of the IEEE Conference on Nanotechnology) - 10.1109/NANO.2018.8626244
IEEE 18th International Conference on Nanotechnology (IEEE-NANO), 2018, p. 8626244  

Documents de recerca 2 registres trobats  
1.
169 p, 10.2 MB Heat transfer fluids : from fundamental aspects of graphene nanofluids at room temperature to molten salts formulations for solar-thermal conversion / Rodríguez Laguna, María del Rocío ; Gómez Romero, Pedro, 1959-, dir. ; Sotomayor Torres, Clivia M, dir. ; Chávez Ángel, Emigdio, dir. ; Ros i Badosa, Josep, dir. ; Universitat Autònoma de Barcelona. Departament de Química
Los fluidos de transferencia de calor, y en particular los nanofluidos, se pueden considerar un elemento esencial en diversos sectores industriales y su rendimiento es clave para una adecuada aplicación en tecnologías que van desde la gestión térmica y la refrigeración, a la generación de energía solar térmica y eléctrica mediante el uso de intercambiadores de calor. [...]
Heat transfer fluids and nanofluids constitute an important element in the industry and their performance is key to the successful application in technologies that go from heat management and cooling to heat exchangers in thermal-solar energy and electricity generation. [...]

[Barcelona] : Universitat Autònoma de Barcelona, 2019.  
2.
240 p, 2.8 MB Confined acoustic phonons in si nanomembranes: impact on thermal properties / Chávez Ángel, Emigdio ; Sotomayor Torres, Clivia M., dir. ; Mompart Penina, Jordi, dir. (Universitat Autònoma de Barcelona. Departament de Física) ; Universitat Autònoma de Barcelona. Departament de Física
La tendencia de la miniaturización tecnológica ha conducido a la generación de densidades de potencia que exceden los 100 watts/cm2, los cuales están en el orden del calor producido en los reactores termonucleares. [...]
The miniaturization trend of the technology has led to power level densities in excess 100 watts/cm2, which are in the order of the heat produced in a nuclear reactor. The need for new cooling techniques has positioned the thermal management on the stage the last years. [...]

[Barcelona] : Universitat Autònoma de Barcelona, 2014  

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