Electronic and magnetic properties of C60 thin films under ambient conditions: A multitechnique study

Amelines-Sarria, Oscar; Claro, Paula Cecilia dos Santos; Schilardi, Patricia Laura; Blum, B.; Rubert, Aldo A.; Benítez, G.; Basiuk, Vladimir A.; Orive, Alejandro González; Creus, Alberto Hernández; Diaz, Carolina; Salvarezza, Roberto Carlos

doi:10.1016/j.orgel.2011.05.024

Cited by 20 publications

(12 citation statements)

References 66 publications

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“…Then, the surface composition and elements’ chemical states of the above Ni–CNT nanocomposite (Ni:C = 2:1) are investigated through XPS and Raman measurements, as shown in Figure . It is found in Figure a that there are three C 1s peaks located at 281.1, 284.6, and 285.7 eV, respectively, which are assigned to Ni–carbon bond, − CC bonding, and the sp 3 carbon of C–C bonding . At the same time, as shown in Figure b of the Ni–CNT sample’s Ni 2p spectrum, besides the two peaks located at 852.5 and 870.3 eV belonging to nickel (zero valence) and their satellite peaks at 858.8 and 876.7 eV, , another two peaks at 854.8 and 873.0 eV are also found and are related to the existence of Ni–C chemical bond .…”

Section: Resultsmentioning

confidence: 76%

Chemical Ni–C Bonding in Ni–Carbon Nanotube Composite by a Microwave Welding Method and Its Induced High-Frequency Radar Frequency Electromagnetic Wave Absorption

Sha

Gao

Wu³

et al. 2017

ACS Appl. Mater. Interfaces

136

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In this work, a microwave welding method has been used for the construction of chemical Ni-C bonding at the interface between carbon nanotubes (CNTs) and metal Ni to provide a different surface electron distribution, which determined the electromagnetic (EM) wave absorption properties based on a surface plasmon resonance mechanism. Through a serial of detailed examinations, such as X-ray diffraction, scanning electron microscopy, transmission electron microscopy, high-resolution transmission electron microscopy, X-ray photoelectron spectroscopy, and Raman spectrum, the as-expected chemical Ni-C bonding between CNTs and metal Ni has been confirmed. And the Brunauer-Emmett-Teller and surface zeta potential measurements uncovered the great evolution of structure and electronic density compared with CNTs, metal Ni, and Ni-CNT composite without Ni-C bonding. Correspondingly, except the EM absorption due to CNTs and metal Ni in the composite, another wide and strong EM absorption band ranging from 10 to 18 GHz was found, which was induced by the Ni-C bonded interface. With a thinner thickness and more exposed Ni-C interfaces, the Ni-CNT composite displayed less reflection loss.

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Section: Resultsmentioning

confidence: 76%

Chemical Ni–C Bonding in Ni–Carbon Nanotube Composite by a Microwave Welding Method and Its Induced High-Frequency Radar Frequency Electromagnetic Wave Absorption

Sha

Gao

Wu³

et al. 2017

ACS Appl. Mater. Interfaces

136

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“…Fullerenes are well-known as a class of carbon allotropes consisting of molecules composed totally of carbon atoms in the form of hollow spheres or ellipsoids . Due to their remarkable electronic properties and solution processability, many derivatives of fullerenes have been widely utilized in material synthesis, electronics, biomedical systems, nanotechnologies, and solar energy conversion . However, owing to the high symmetry of its spherical structures and the existence of multifold reactive sites, it remains a big challenge to selectively synthesize fullerenes with a certain number of functional units.…”

Section: Introductionmentioning

confidence: 99%

Tailor-Made Pyrazolide-Based Metal–Organic Frameworks for Selective Catalysis

et al. 2018

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The predesignable porous structures in metal-organic frameworks (MOFs) render them quite attractive as a host-guest platform to address a variety of important issues at the frontiers of science. In this work, a perfluorophenylene functionalized metalloporphyrinic MOF, namely, PCN-624, has been rationally designed, synthesized, and structurally characterized. PCN-624 is constructed by 12-connected [Ni(OH)(HO)Pz] (Pz = pyrazolide) nodes and fluorinated 5,10,15,20-tetrakis(2,3,5,6-tetrafluoro-4-(1 H-pyrazol-4-yl)phenyl)-porphyrin (TTFPPP) linker with an ftw-a topological net. Notably, PCN-624 exhibits extinguished robustness under different conditions, including organic solvents, strong acid, and base aqueous solutions. The pore surface of PCN-624 is decorated with pendant perfluorophenylene groups. These moieties fabricate densely fluorinated nanocages resulting in the selective guest capture of the material. More importantly, PCN-624 can be employed as an efficient heterogeneous catalyst for the selective synthesis of fullerene-anthracene bisadduct. Owing to the high chemical robustness of PCN-624, it can be recycled over five times without significant loss of its catalytic activity. All of these results demonstrate that MOFs can serve as a powerful platform with great flexibility for functional design to solve various synthetic problems.

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“…The crystalline C 60 films were also deposited on a dielectric Al 2 O 3 surface to make the simulation more realistic. The epitaxial growth of the C 60 thin films of various thicknesses on various metallic or dielectric substrates under ambient conditions and in high vacuum was studied in references [52][53][54][55][56][57][58]. Some experimental studies even show that the crystalline growth of the C 60 thin films on pentacene buffer layers is exclusively (111)-oriented [55].…”

Section: Introductionmentioning

confidence: 99%

Prediction of Strong Transversal s(TE) Exciton–Polaritons in C60 Thin Crystalline Films

Despoja

Marušić

2022

IJMS

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If an exciton and a photon can change each other’s properties, indicating that the regime of their strong bond is achieved, it usually happens in standard microcavity devices, where the large overlap between the ’confined’ cavity photons and the 2D excitons enable the hybridization and the band gap opening in the parabolic photonic branch (as clear evidence of the strong exciton–photon coupling). Here, we show that the strong light–matter coupling can occur beyond the microcavity device setup, i.e., between the ’free’ s(TE) photons and excitons. The s(TE) exciton–polariton is a polarization mode, which (contrary to the p(TM) mode) appears only as a coexistence of a photon and an exciton, i.e., it vanishes in the non-retarded limit (c→∞). We show that a thin fullerene C60 crystalline film (consisting of N C60 single layers) deposited on an Al2O3 dielectric surface supports strong evanescent s(TE)-polarized exciton–polariton. The calculated Rabi splitting is more than Ω=500 meV for N=10, with a tendency to increase with N, indicating a very strong photonic character of the exciton–polariton.

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Electronic and magnetic properties of C60 thin films under ambient conditions: A multitechnique study

Cited by 20 publications

References 66 publications

Chemical Ni–C Bonding in Ni–Carbon Nanotube Composite by a Microwave Welding Method and Its Induced High-Frequency Radar Frequency Electromagnetic Wave Absorption

Chemical Ni–C Bonding in Ni–Carbon Nanotube Composite by a Microwave Welding Method and Its Induced High-Frequency Radar Frequency Electromagnetic Wave Absorption

Tailor-Made Pyrazolide-Based Metal–Organic Frameworks for Selective Catalysis

Prediction of Strong Transversal s(TE) Exciton–Polaritons in C60 Thin Crystalline Films

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