Nanocomposite films of a-C:H/Bi made using a toroidal planar hollow cathode
Por:
Perez-Pacheco, A., Garcia, E., Calderon-Olvera, R. M., Muhl, S., Camps, E., Lejeune, M., Mikmekova, E.
Publicada:
1 ene 2020
Resumen:
We report the synthesis of nanocomposite films of bismuth nanoparticles (Bi NP) in a hydrogenated amorphous carbon, a-C:H, matrix. The bismuth nanoparticles were generated within a toroidal planar hollow cathode (TPHC) system using a pulsed DC power of 200 W, and the a-C:H was simultaneously produced by plasma enhanced chemical vapour deposition (PECVD) of acetylene, or methane, in the exit-plasma from the TPHC. The concurrent nanoparticle and amorphous film formation meant that the distribution of nanoparticles within the deposits was uniform and avoided problems of agglomeration of the nanoparticles. The advantage of this synthesis method is that any material which can be sputtered, including magnetic materials, can be used to produce the nanoparticle phase of the nanocomposite. The exhaust plasma from the TPHC can be used to simultaneously deposit the amorphous phase through a suitable plasma enhanced chemical reaction. The Bi/a-C:H films were deposited on glass and Si substrates, and the gas flow of acetylene, or methane, was varied from 20 to 120 sccm. The morphology, size, and distribution of the nanoparticles were measured by SEM and STEM. Additionally, X-ray diffraction, Raman and EDS were used to determine the structure and chemical composition of the samples. Resistivity measurements were performed using the four-point method. © 2020 Elsevier B.V.
Filiaciones:
Perez-Pacheco, A.:
Unidad de Investigación y Desarrollo Tecnológico (UIDT), Hospital General de México “Dr. Eduardo Liceaga”, Ciudad de México, 06720, Mexico
Hosp Gen Mexico Dr Eduardo Liceaga, Unidad Invest & Desarrollo Tecnol UIDT, Ciudad De Mexico 06720, Mexico
Garcia, E.:
Universidad de Guadalajara, Centro Universitario de Ciencias Exactas e Ingenierías, Cátedras-CONACyT, Guadalajara, Jalisco 44430, Mexico
Univ Guadalajara, Ctr Univ Ciencias Exactas & Ingn, Catedras CONACyT, Guadalajara 44430, Jalisco, Mexico
Calderon-Olvera, R. M.:
Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, México, 04510 DF, Mexico
Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, Mexico
Muhl, S.:
Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, México, 04510 DF, Mexico
Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, Mexico
Camps, E.:
Departamento de Física, Instituto Nacional de Investigaciones Nucleares, Apartado Postal 18-1027, Mexico, DF 11801, Mexico
Inst Nacl Invest Nucl, Dept Fis, Apartado Postal 18-1027, Mexico City 11801, DF, Mexico
Lejeune, M.:
Université de Picardie Jules Verne, Laboratoire de Physique de la Matière Condensée, 33 rue St Leu, Amiens, 80039, France
Univ Picardie Jules Verne, Lab Phys Matiere Condensee, 33 Rue St Leu, F-80039 Amiens, France
Mikmekova, E.:
Institute of Scientific Instruments of the CAS, v. v. i., Královopolská 147, Brno, 61264, Czech Republic
CAS, Vvi, Inst Sci Instruments, Kralovopolska 147, Brno 61264, Czech Republic
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