Pressure-induced polymerization of nano- and submicrometer C60 rods into a rhombohedral phase

Hou, Yuanyuan; Liu, Bingbing; Hong-yan, MA; Wang, Lin; Zhao, Qiang; Cui, Tian; Chen, Ao; Liu, Dedi; Shen, Yu; Jia, Xiaopeng; Zou, Guangtian; Sundqvist, Bertil

doi:10.1016/j.cplett.2006.03.057

Cited by 13 publications

(14 citation statements)

References 17 publications

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“…This peak has been discussed in our previous study on the R phase and was assumed to originate from R phase related surface defects. [39] The PL intensity of the polymeric samples is about ten times higher than that of pristine C 60 nanorods in air, indicating that the polymerization greatly enhances the luminescence of C 60 nanorods. The enhanced fluorescences with tunable frequency for different polymeric C 60 nanorods provide a potential application in luminescent nanomaterials.…”

Section: -5mentioning

confidence: 92%

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Controllable synthesis of fullerene nano/microcrystals and their structural transformation induced by high pressure

Yao

Liu

2013

Chinese Phys. B

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Fullerene molecules are interesting materials because of their unique structures and properties in mechanical, electrical, magnetic, and optical aspects. Current research is focusing on the construction of well-defined fullerene nano/microcrystals that possess desirable structures and morphologies. Further tuning the intermolecular interaction of the fullerene nano/microcrystals by use of pressure is an efficient way to modify their structures and properties, such as creation of nanoscale polymer structures and new hybrid materials, which expands the potential of such nanoscale materials for direct device components. In this paper, we review our recent progress in the construction of fullerene nanostructures and their structural transformation induced by high pressure. Fullerene nano/microcrystals with controllable size, morphology and structure have been synthesized through the self-assembly of fullerene molecules by a solvent-assisted method. By virtue of high pressure, the structures, components, and intermolecular interactions of the assemblied fullerene nano/microcrystals can be finely tuned, thereby modifying the optical and electronic properties of the nanostructures. Several examples on high pressure induced novel structural phase transition in typical fullerene nanocrystals with C60 or C70 cage serving as building blocks are presented, including high pressure induced amorphization of the nanocrystals and their bulk moduli, high pressure and high temperature (HPHT) induced polymerization in C60 nanocrystals, pressure tuned reversible polymerization in ferrocene-doped C60/C70 single crystal, as well as unique long-range ordered crystal with amorphous nanoclusters serving as building blocks in solvated C60 crystals, which brings new physical insight into the understanding of order and disorder concept and new approaches to the design of superhard carbon materials. The nanosize and morphology effects on the transformations of fullerene nanocrystals have also been discussed. These results provide the foundation for the fabrication of pre-designed and controllable geometries, which is critical in fullerenes and relevant materials for designing nanometer-scale electronic, optical, and other devices.

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Section: -5mentioning

confidence: 92%

“…10). [38][39][40][41] In the experiment, the C 60 nanocrystals were located on a Mo substrate and then transferred into a big press for HPHT treatments with silicon oil as pressure medium.…”

Section: -5mentioning

confidence: 99%

Controllable synthesis of fullerene nano/microcrystals and their structural transformation induced by high pressure

Yao

Liu

2013

Chinese Phys. B

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“…Previous reports suggested that when fullerenes were polymerized, their molecular symmetry will decreased, which could improve their PL intensities [22][23][24]. Nevertheless, when fullerenes are polymerized their band gaps would also be changed, resulting in a change of their luminescence wavelengths [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

“…Nevertheless, when fullerenes are polymerized their band gaps would also be changed, resulting in a change of their luminescence wavelengths [22][23][24]. In our recent work, we have found that introduction of m-xylene into C 60 nanorods is effectual for enhancing luminescence, which do not change its initial luminescence wavelength [25].…”

Section: Introductionmentioning

confidence: 99%

Effects of alcohols on shape-tuning and luminescence-enhancing of C70 nanocrystals

et al. 2013

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“…C 60 nanorods were synthesized by a simple solution method [7,15] . We selected nanorods with diameters in the range of 200-1000 nm.…”

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confidence: 99%

Decoration of C60 nanorods with nickel and their magnetic properties

et al. 2009

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We studied the coating of C 60 nanorods with nickel by electroless plating method and investigated their magnetic properties. The morphology and structure of the nickel layer coated on C 60 nanorods were characterized by transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD) and Raman spectroscopy. The coated nickel is in the form of nano-sized crystals and becomes a continuous layer as reaction time increases. The hysteresis loop shows a super paramagnetic characteristic similar to that of nanometer-sized nickel particle. These results suggest that the average size of nickel particles on C 60 rods is below 10 nm. Our study has shown that electroless plating is an efficient and simple method for coating C 60 nanorods with nickel.C 60 nanorods, electroless plating, magnetic propertiesThe unique structural, physical and chemical properties of one-dimensional carbon nanostructure materials have revolutionized the field of nanotechnology [1] . As a representative member of the carbon nanomaterial family, C 60 has been the subject of numerous studies due to its special molecular structure since its discovery [2][3][4][5] . It has been investigated in various configurations, such as films, powders, bulk single crystals, and composites with metals, ceramics and polymer matrices, which show outstanding performances in the fields of novel superhard materials, superconductivity, optics, catalysis, etc. Recently, one-dimensional C 60 has also attracted much attention due to their potential applications in the field of nanometer scale devices [6] . The preparation of highly crystalline C 60 with specified geometries is a challenging topic of great interests. We have recently successfully synthesized nanometer C 60 rods using a very simple solution method. The diameter and length of the nanorods can be controlled by adjusting the growth conditions. The nanorods obtained are highly crystalline and single phase [7] . This result has motivated us to further study the fabrication of novel composite C 60 nanorods with other materials to modify their physical properties.Previous studies have shown that the nickel-coated carbon materials have many unique properties. The nickel coating layer enables the carbon materials to resist chemical erosion sequentially, enhances the stability of the composite, and improves the composite properties, such as higher electrical conductivity, magnetism and good adhesion [8] . There are many effective methods of coating nickel on carbon nanomaterials [9]

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Pressure-induced polymerization of nano- and submicrometer C60 rods into a rhombohedral phase

Cited by 13 publications

References 17 publications

Controllable synthesis of fullerene nano/microcrystals and their structural transformation induced by high pressure

Controllable synthesis of fullerene nano/microcrystals and their structural transformation induced by high pressure

Effects of alcohols on shape-tuning and luminescence-enhancing of C70 nanocrystals

Decoration of C60 nanorods with nickel and their magnetic properties

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