Your browser doesn't support javascript.
loading
Comprehensive study of nanostructured Bi2Te3 thermoelectric materials - insights from synchrotron radiation XRD, XAFS, and XRF techniques.
Imam, N G; Elyamny, Shaimaa; Aquilanti, Giuliana; Pollastri, Simone; Gigli, Lara; Kashyout, Abd El-Hady B.
Afiliação
  • Imam NG; Experimental Nuclear Physics Department (Solid State Laboratory), Nuclear Research Center (NRC), Egyptian Atomic Energy Authority (EAEA) Cairo 13759 Egypt.
  • Elyamny S; Elettra - Sincrotrone Trieste Strada Statale 14 - km 163,5 in AREA Science Park, Basovizza 34149 Trieste Italy.
  • Aquilanti G; Electronic Materials Research Department, Advanced Technology and New Materials Research Institute, City of Scientific Research and Technological Applications (SRTA-City) New Borg El-Arab City, P.O. Box 21934 Alexandria Egypt selyamny@srtacity.sci.eg.
  • Pollastri S; Elettra - Sincrotrone Trieste Strada Statale 14 - km 163,5 in AREA Science Park, Basovizza 34149 Trieste Italy.
  • Gigli L; Elettra - Sincrotrone Trieste Strada Statale 14 - km 163,5 in AREA Science Park, Basovizza 34149 Trieste Italy.
  • Kashyout AEB; Elettra - Sincrotrone Trieste Strada Statale 14 - km 163,5 in AREA Science Park, Basovizza 34149 Trieste Italy.
RSC Adv ; 14(3): 1875-1887, 2024 Jan 03.
Article em En | MEDLINE | ID: mdl-38192325
ABSTRACT
In this contribution, a comprehensive study of nanostructured Bi2Te3 (BT) thermoelectric material was performed using a combination of synchrotron radiation-based techniques such as XAFS, and XRF, along with some other laboratory techniques such as XRD, XPS, FESEM, and HRTEM. This study aims to track the change in morphological, compositional, average and local/electronic structures of Bi2Te3 of two different phases; nanostructure (thin film) and nanopowders (NPs). Bi2Te3 nanomaterial was fabricated as pellets using zone melting process in a one step process, while Bi2Te3 thin film was deposited on sodalime glass substrate using a vacuum thermal evaporation technique. Synchrotron radiation-based Bi LIII-edge fluorescence-mode X-ray absorption fine structure (XAFS) technique was performed to probe locally the electronic and fine structures of BT thin film around the Bi atom, while transmission-mode XAFS was used for BT NPs distributed in the PVP matrix. The structural features of the collected Bi LIII XANES spectra of thin film and powder samples of BT are compared with the simulated XANES spectrum of BT calculated using FDMNES code at 5 Å cluster size. Combining different off-line structural characterization techniques (XRD, FESEM, XPS, and HRTEM), along with those of synchrotron radiation-based techniques (XAFS and XRF) is necessary for complementary and supported average crystal, chemical, morphological and local electronic structural analyses for unveiling the variation between Bi2Te3 in the nanostructure/thin film and nanopowder morphology, and then connecting between the structural features and functions of BT in two different morphologies. After that, we measured the Seebeck coefficient and the power factor values for both the BT nanopowder and thin film.

Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2024 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2024 Tipo de documento: Article