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.</jats:p

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

Building Bridges, Breaking Barriers: The Smart Approach to Distance Between Disciplines in Research Projects

The process of guiding the final project at the University of Mitra Indonesia has several obstacles when the process of working on student skirpsi is hampered, the difficulty of students and supervisors to conduct the guidance process. To overcome the existing problems, one effort is to build a thesis guidance information system. Therefore, the author proposes a thesis guidance information system that can be accessed anywhere and anytime. The online thesis guidance system that has been built can be applied to facilitate lecturers in examining and revising documents sent by students so that the design of an online thesis guidance system can help the final project guidance process at theUniversity of Mitra Indonesia, starting from the student registration process, sending files and interacting with the guidance process between lecturers and students. In addition, with the existence of an online thesis guidance system, it is expected that the process of implementing thesis guidance for students and lecturers will become clearer and more targeted

Disinformation and Digital Media as a Challenge for Democracy

"It would be pleasant to think that democracies will always wake up to their threats – internal and external – and heal themselves in good time before it is too late. [...] Yet, it is not too late to find public policy solutions which can restore information technologies to their original role of facilitators of democracy rather than their undertakers. But the timeframe is closing and we need these solutions sooner rather than later