Low temperature solid-state wetting and formation of nanowelds in silver nanowires
Само за регистроване кориснике
2017
Аутори
Radmilović, VukGoebelt, Manuela
Ophus, Colin
Christiansen, Silke
Spiecker, Erdmann
Radmilović, Velimir R.
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
This article focuses on the microscopic mechanism of thermally induced nanoweld formation between silver nanowires (AgNWs) which is a key process for improving electrical conductivity in NW networks employed for transparent electrodes. Focused ion beam sectioning and transmission electron microscopy were applied in order to elucidate the atomic structure of a welded NW including measurement of the wetting contact angle and characterization of defect structure with atomic accuracy, which provides fundamental information on the welding mechanism. Crystal lattice strain, obtained by direct evaluation of atomic column displacements in high resolution scanning transmission electron microscopy images, was shown to be non-uniform among the five twin segments of the AgNW pentagonal structure. It was found that the pentagonal cross-sectional morphology of AgNWs has a dominant effect on the formation of nanowelds by controlling initial wetting as well as diffusion of Ag atoms between the NWs. Du...e to complete solid-state wetting, at an angle of similar to 4.8 degrees, the welding process starts with homoepitaxial nucleation of an initial Ag layer on (100) surface facets, considered to have an infinitely large radius of curvature. However, the strong driving force for this process due to the Gibbs-Thomson effect, requires the NW contact to occur through the corner of the pentagonal cross-section of the second NW providing a small radius of curvature. After the initial layer is formed, the welded zone continues to grow and extends out epitaxially to the neighboring twin segments.
Кључне речи:
silver nanowires (AgNWs) / aluminum-doped zinc oxide (AZO) / nanoweld formation / solid-state wetting / nanowire sinteringИзвор:
Nanotechnology, 2017, 28, 38Издавач:
- IOP Publishing Ltd, Bristol
Финансирање / пројекти:
- 'Start Up For Science' program
- Serbian Academy of Sciences and Arts [F-141]
- DFG within the Research Training GroupGerman Research Foundation (DFG) [GRK1896]
- Office of Science, Office of Basic Energy Sciences, of the U.S. Department of EnergyUnited States Department of Energy (DOE) [DE-AC02-05CH11231]
- Cluster of Excellence 'Engineering of Advanced Materials (EAM)' at the University of Erlangen-Nuremberg, Germany [EXC315]
- Синтеза, развој технологија добијања и примена наноструктурних мултифункционалних материјала дефинисаних својстава (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45019)
- Развој, карактеризација и примена наноструктуираних композитних катализатора и интерактивних носача у горивним спреговима и електролизи воде (RS-MESTD-Basic Research (BR or ON)-172054)
DOI: 10.1088/1361-6528/aa7eb8
ISSN: 0957-4484
PubMed: 28691926
WoS: 000413181300001
Scopus: 2-s2.0-85029081121
Институција/група
Tehnološko-metalurški fakultetTY - JOUR AU - Radmilović, Vuk AU - Goebelt, Manuela AU - Ophus, Colin AU - Christiansen, Silke AU - Spiecker, Erdmann AU - Radmilović, Velimir R. PY - 2017 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3633 AB - This article focuses on the microscopic mechanism of thermally induced nanoweld formation between silver nanowires (AgNWs) which is a key process for improving electrical conductivity in NW networks employed for transparent electrodes. Focused ion beam sectioning and transmission electron microscopy were applied in order to elucidate the atomic structure of a welded NW including measurement of the wetting contact angle and characterization of defect structure with atomic accuracy, which provides fundamental information on the welding mechanism. Crystal lattice strain, obtained by direct evaluation of atomic column displacements in high resolution scanning transmission electron microscopy images, was shown to be non-uniform among the five twin segments of the AgNW pentagonal structure. It was found that the pentagonal cross-sectional morphology of AgNWs has a dominant effect on the formation of nanowelds by controlling initial wetting as well as diffusion of Ag atoms between the NWs. Due to complete solid-state wetting, at an angle of similar to 4.8 degrees, the welding process starts with homoepitaxial nucleation of an initial Ag layer on (100) surface facets, considered to have an infinitely large radius of curvature. However, the strong driving force for this process due to the Gibbs-Thomson effect, requires the NW contact to occur through the corner of the pentagonal cross-section of the second NW providing a small radius of curvature. After the initial layer is formed, the welded zone continues to grow and extends out epitaxially to the neighboring twin segments. PB - IOP Publishing Ltd, Bristol T2 - Nanotechnology T1 - Low temperature solid-state wetting and formation of nanowelds in silver nanowires IS - 38 VL - 28 DO - 10.1088/1361-6528/aa7eb8 ER -
@article{ author = "Radmilović, Vuk and Goebelt, Manuela and Ophus, Colin and Christiansen, Silke and Spiecker, Erdmann and Radmilović, Velimir R.", year = "2017", abstract = "This article focuses on the microscopic mechanism of thermally induced nanoweld formation between silver nanowires (AgNWs) which is a key process for improving electrical conductivity in NW networks employed for transparent electrodes. Focused ion beam sectioning and transmission electron microscopy were applied in order to elucidate the atomic structure of a welded NW including measurement of the wetting contact angle and characterization of defect structure with atomic accuracy, which provides fundamental information on the welding mechanism. Crystal lattice strain, obtained by direct evaluation of atomic column displacements in high resolution scanning transmission electron microscopy images, was shown to be non-uniform among the five twin segments of the AgNW pentagonal structure. It was found that the pentagonal cross-sectional morphology of AgNWs has a dominant effect on the formation of nanowelds by controlling initial wetting as well as diffusion of Ag atoms between the NWs. Due to complete solid-state wetting, at an angle of similar to 4.8 degrees, the welding process starts with homoepitaxial nucleation of an initial Ag layer on (100) surface facets, considered to have an infinitely large radius of curvature. However, the strong driving force for this process due to the Gibbs-Thomson effect, requires the NW contact to occur through the corner of the pentagonal cross-section of the second NW providing a small radius of curvature. After the initial layer is formed, the welded zone continues to grow and extends out epitaxially to the neighboring twin segments.", publisher = "IOP Publishing Ltd, Bristol", journal = "Nanotechnology", title = "Low temperature solid-state wetting and formation of nanowelds in silver nanowires", number = "38", volume = "28", doi = "10.1088/1361-6528/aa7eb8" }
Radmilović, V., Goebelt, M., Ophus, C., Christiansen, S., Spiecker, E.,& Radmilović, V. R.. (2017). Low temperature solid-state wetting and formation of nanowelds in silver nanowires. in Nanotechnology IOP Publishing Ltd, Bristol., 28(38). https://doi.org/10.1088/1361-6528/aa7eb8
Radmilović V, Goebelt M, Ophus C, Christiansen S, Spiecker E, Radmilović VR. Low temperature solid-state wetting and formation of nanowelds in silver nanowires. in Nanotechnology. 2017;28(38). doi:10.1088/1361-6528/aa7eb8 .
Radmilović, Vuk, Goebelt, Manuela, Ophus, Colin, Christiansen, Silke, Spiecker, Erdmann, Radmilović, Velimir R., "Low temperature solid-state wetting and formation of nanowelds in silver nanowires" in Nanotechnology, 28, no. 38 (2017), https://doi.org/10.1088/1361-6528/aa7eb8 . .