Optimization of pt-c deposits by cryo-fibid: Substantial growth rate increase and quasi-metallic behaviour

Salvador-Porroche, A. (Universidad de Zaragoza) ; Sangiao, S. (Universidad de Zaragoza) ; Philipp, P. ; Cea, P. (Universidad de Zaragoza) ; De Teresa, J.M. (Universidad de Zaragoza)

Resumen: The Focused Ion Beam Induced Deposition (FIBID) under cryogenic conditions (Cryo-FIBID) technique is based on obtaining a condensed layer of precursor molecules by cooling the substrate below the condensation temperature of the gaseous precursor material. This condensed layer is irradiated with ions according to a desired pattern and, subsequently, the substrate is heated above the precursor condensation temperature, revealing the deposits with the shape of the exposed pattern. In this contribution, the fast growth of Pt-C deposits by Cryo-FIBID is demonstrated. Here, we optimize various parameters of the process in order to obtain deposits with the lowest-possible electrical resistivity. Optimized ~30 nm-thick Pt-C deposits are obtained using ion irradiation area dose of 120 µC/cm2 at 30 kV. This finding represents a substantial increment in the growth rate when it is compared with deposits of the same thickness fabricated by standard FIBID at room temperature (40 times enhancement). The value of the electrical resistivity in optimized deposits (~4 × 104 µO cm) is suitable to perform electrical contacts to certain materials. As a proof of concept of the potential applications of this technology, a 100 µm × 100 µm pattern is carried out in only 43 s of ion exposure (area dose of 23 µC/cm2), to be compared with 2.5 h if grown by standard FIBID at room temperature. The ion trajectories and the deposit composition have been simulated using a binary-collision-approximation Monte Carlo code, providing a solid basis for the understanding of the experimental results.

Idioma: Inglés

DOI: 10.3390/nano10101906

Año: 2020

Publicado en: Nanomaterials 10, 10 (2020), 1906 [14 pp]
ISSN: 2079-4991

Factor impacto JCR: 5.076 (2020)

Categ. JCR: PHYSICS, APPLIED rank: 35 / 160 = 0.219 (2020) - Q1 - T1
Categ. JCR: NANOSCIENCE & NANOTECHNOLOGY rank: 51 / 106 = 0.481 (2020) - Q2 - T2
Categ. JCR: CHEMISTRY, MULTIDISCIPLINARY rank: 55 / 178 = 0.309 (2020) - Q2 - T1
Categ. JCR: MATERIALS SCIENCE, MULTIDISCIPLINARY rank: 103 / 333 = 0.309 (2020) - Q2 - T1

Factor impacto SCIMAGO: 0.919 - Materials Science (miscellaneous) (Q1) - Chemical Engineering (miscellaneous) (Q1)

Financiación: info:eu-repo/grantAgreement/ES/DGA/E13-20R
Financiación: info:eu-repo/grantAgreement/ES/DGA/E31-20R
Financiación: info:eu-repo/grantAgreement/ES/DGA-FEDER/Construyendo Europa desde Aragón
Financiación: info:eu-repo/grantAgreement/ES/DGA/LMP33-18
Financiación: info:eu-repo/grantAgreement/ES/MINECO-FEDER/PID2019-105881RB-I00
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2016-78257-R
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2017-82970-C2-2-R
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2018-102627-T

Tipo y forma: Article (Published version)

Área (Departamento): Área Química Física (Dpto. Química Física)
Área (Departamento): Área Física Materia Condensada (Dpto. Física Materia Condensa.)