English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/89634
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Title

Fabrication of Bi2Te3 nanowire arrays and thermal conductivity measurement by 3ω-scanning thermal microscopy

AuthorsMuñoz Rojo, Miguel ; Grauby, Stéphane; Rampnoux , J. M.; Caballero-Calero, Olga ; Martín-González, Marisol; Dilhaire, Stefan
Issue DateFeb-2013
PublisherAmerican Institute of Physics
CitationJournal of Applied Physics 113: 054308 (2013)
AbstractBi2Te3 is well-known for its utility in thermoelectrical applications and more recently as topological insulator. Its nanostructuration has attracted plenty of attention because of its potential capacity to reduce thermal conductivity. Here, we have grown a composite sample made of a Bi2Te3 nanowires (NWs) array embedded in an alumina matrix. We have then performed scanning thermal microscopy (SThM) in a 3ω configuration to measure its equivalent thermal resistance. Using an effective medium model, we could then estimate the mean composite thermal conductivity as well as the thermal conductivity of the NWs to be, respectively, (λC) = (1.68 ± 0.20) W/mK and (λNW) = (1.37 ± 0.20) W/mK, showing a slight thermal conductivity reduction. Up to now, there have been two main techniques reported in literature to evaluate the thermal conductivity of nanostructures: the use of a thermal microchip to probe a single NW once its matrix has been dissolved or the probing of the whole NWs array embedded in a matrix, obtaining the thermal conductivity of the whole as an effective medium. However, the 3ω-SThM presented here is the only technique able to measure the thermal conductivity of single NWs embedded in a matrix as well as the thermal conductivity of the composite locally. This technique is more versatile and straightforward than other methods to obtain the thermal conductivity of nanostructures. © 2013 American Institute of Physics.
Publisher version (URL)http://dx.doi.org/10.1063/1.4790363
URIhttp://hdl.handle.net/10261/89634
DOI10.1063/1.4790363
Identifiersissn: 0021-8979
e-issn: 1089-7550
Appears in Collections:(IMN-CNM) Artículos
Files in This Item:
File Description SizeFormat 
fabrication_Bi2Te3_Munoz.pdf603,6 kBAdobe PDFThumbnail
View/Open
Show full item record
Review this work
 

Related articles:


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.