Jeronimo Terrones Portas
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
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Research Interests
Jeronimo Terrones Portas has a total of 23 co-authors. Here are the top co-authors by number of shared publications:
- Fiona Smail
Dep. Chem., Univ. Nottingham, Nottingham NG7 2RD, UK
2 shared publications - James A. Elliott
Department of Materials Science & Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge, CB3 0FS, United Kingdom
2 shared publications - Adam M. Boies
University of Cambridge, Department of Engineering, Cambridge CB2 1PZ, UK
1 shared publication Adarsh Kaniyoor
Department of Materials Science and Metallurgy University of Cambridge CB3 0FS Cambridge UK
1 shared publication- Adarsh Kaniyoor
Department of Materials Science and Metallurgy, University of Cambridge, Cambridge CB3 0FS, UK
1 shared publication - Daniel David Tune
Institute of Nanotechnology Karlsruhe Institute of Technology (KIT) 76021 Karlsruhe Germany
1 shared publication
Latest Publications
- Open Access
Simultaneously Enhanced Tenacity, Rupture Work, and Thermal Conductivity of Carbon Nanotubes Fibers by Increasing the Effective Tube Contribution
Although individual carbon nanotubes (CNTs) are superior as constituents to polymer chains, the mechanical and thermal properties of CNT fibers (CNTFs) remain inferior to commercial synthetic fibers due to the lack of synthesis methods to embed CNTs effectively in superstructures. The application of conventional techniques for mechanical enhancement resulted in a mild improvement of target properties while achieving parity at best on others. In this work, a Double-Drawing technique is developed to deform continuously grown CNTFs and rearrange the constituent CNTs in both mesoscale and nanoscale morphology. Consequently, the mechanical and thermal properties of the resulting CNTFs can be jointly improved, and simultaneously reach their highest performances with specific strength (tenacity) $\rm\sim3.30\,N\,tex^{-1}$, work of rupture $\rm\sim70\,J\,g^{-1}$, and thermal conductivity $\rm\sim354\,W\,m^{-1}\,K^{-1}$, despite starting from commercial low-crystallinity materials ($I{\rm_G}:I{\rm_D}\sim5$). The processed CNTFs are more versatile than comparable carbon fiber, Zylon, Dyneema, and Kevlar. Furthermore, based on evidence of load transfer efficiency on individual CNTs measured with In-Situ Stretching Raman, we find the main contributors to property enhancements are (1) the increased proportion of load-bearing CNT bundles and (2) the extension of effective length of tubes attached on these bundles.Open AccessSimultaneously Enhanced Tenacity, Rupture Work, and Thermal Conductivity of Carbon Nanotubes Fibers by Increasing the Effective Tube Contribution
Although individual carbon nanotubes (CNTs) are superior as constituents to polymer chains, the mechanical and thermal properties of CNT fibers (CNTFs) remain inferior to commercial synthetic fibers due to the lack of synthesis methods to embed CNTs effectively in superstructures. The application of conventional techniques for mechanical enhancement resulted in a mild improvement of target properties while achieving parity at best on others. In this work, a Double-Drawing technique is developed to deform continuously grown CNTFs and rearrange the constituent CNTs in both mesoscale and nanoscale morphology. Consequently, the mechanical and thermal properties of the resulting CNTFs can be jointly improved, and simultaneously reach their highest performances with specific strength (tenacity) $\rm\sim3.30\,N\,tex^{-1}$, work of rupture $\rm\sim70\,J\,g^{-1}$, and thermal conductivity $\rm\sim354\,W\,m^{-1}\,K^{-1}$, despite starting from commercial low-crystallinity materials ($I{\rm_G}:I{\rm_D}\sim5$). The processed CNTFs are more versatile than comparable carbon fiber, Zylon, Dyneema, and Kevlar. Furthermore, based on evidence of load transfer efficiency on individual CNTs measured with In-Situ Stretching Raman, we find the main contributors to property enhancements are (1) the increased proportion of load-bearing CNT bundles and (2) the extension of effective length of tubes attached on these bundles. - Open Access
Catalyst-Mediated Enhancement of Carbon Nanotube Textiles by Laser Irradiation: Nanoparticle Sweating and Bundle Alignment
The photonic post-processing of suspended carbon nanotube (CNT) ribbons made by floating catalyst chemical vapor deposition (FC-CVD) results in selective sorting of the carbon nanotubes present. Defective, thermally non-conductive or unconnected CNTs are burned away, in some cases leaving behind a highly crystalline (as indicated by the Raman G:D ratio), highly conductive network. However, the improvement in crystallinity does not always occur but is dependent on sample composition. Here, we report on fundamental features, which are observed for all samples. Pulse irradiation (not only by laser but also white light camera flashes, as well as thermal processes such as Joule heating) lead to (1) the sweating-out of catalyst nanoparticles resulting in molten catalyst beads of up to several hundreds of nanometres in diameter on the textile surface and (2) a significant improvement in CNT bundle alignment. The behavior of the catalyst beads is material dependent. Here, we show the underlying mechanisms of the photonic post-treatment by modelling the macro- and microstructural changes of the CNT network and show that it is mainly the amount of residual catalyst which determines how much energy these materials can withstand before their complete decomposition.
Open AccessCatalyst-Mediated Enhancement of Carbon Nanotube Textiles by Laser Irradiation: Nanoparticle Sweating and Bundle Alignment
The photonic post-processing of suspended carbon nanotube (CNT) ribbons made by floating catalyst chemical vapor deposition (FC-CVD) results in selective sorting of the carbon nanotubes present. Defective, thermally non-conductive or unconnected CNTs are burned away, in some cases leaving behind a highly crystalline (as indicated by the Raman G:D ratio), highly conductive network. However, the improvement in crystallinity does not always occur but is dependent on sample composition. Here, we report on fundamental features, which are observed for all samples. Pulse irradiation (not only by laser but also white light camera flashes, as well as thermal processes such as Joule heating) lead to (1) the sweating-out of catalyst nanoparticles resulting in molten catalyst beads of up to several hundreds of nanometres in diameter on the textile surface and (2) a significant improvement in CNT bundle alignment. The behavior of the catalyst beads is material dependent. Here, we show the underlying mechanisms of the photonic post-treatment by modelling the macro- and microstructural changes of the CNT network and show that it is mainly the amount of residual catalyst which determines how much energy these materials can withstand before their complete decomposition.