Characterizing high-pressure compressed C<sub>60</sub> whiskers and C<sub>60</sub> powder

Miyazawa, Kun’ichi; Akaishi, Minoru; Kuwasaki, Y.; Suga, Tadatomo

doi:10.1557/jmr.2003.0023

Cited by 6 publications

(3 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An aliquot of a C 60 -saturated toluene solution is added to a glass bottle. Following this, an appropriate amount of IPA is added gently to the solution to form a liquid–liquid interface [ 8 ]. The resulting mixture is kept at ambient temperatures, typically below 25 °C.…”

Section: Synthesis Of Fnwsmentioning

confidence: 99%

“…Bulk samples can also be prepared by sintering at high temperatures. The [2 + 2] cycloaddition polymerization of C 60 molecules is known to occur in the presence of ultraviolet or visible light illumination [ 3 , 4 ], high-pressure sintering [ 5 – 8 ], and electron beam irradiation [ 9 , 10 ]. The hardness of high-pressure sintered C 60 reaches 200–300 GPa [ 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Synthesis of fullerene nanowhiskers using the liquid–liquid interfacial precipitation method and their mechanical, electrical and superconducting properties

Miyazawa

2015

Science and Technology of Advanced Materials

View full text Add to dashboard Cite

Fullerene nanowhiskers (FNWs) are thin crystalline fibers composed of fullerene molecules, including C60, C70, endohedral, or functionalized fullerenes. FNWs display n-type semiconducting behavior and are used in a diverse range of applications, including field-effect transistors, solar cells, chemical sensors, and photocatalysts. Alkali metal-doped C60 (fullerene) nanowhiskers (C60NWs) exhibit superconducting behavior. Potassium-doped C60NWs have realized the highest superconducting volume fraction of the alkali metal-doped C60 crystals and display a high critical current density (Jc) under a high magnetic field of 50 kOe. The growth control of FNWs is important for their success in practical applications. This paper reviews recent FNWs research focusing on their mechanical, electrical and superconducting properties and growth mechanisms in the liquid–liquid interfacial precipitation method.

show abstract

Section: Synthesis Of Fnwsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis of fullerene nanowhiskers using the liquid–liquid interfacial precipitation method and their mechanical, electrical and superconducting properties

Miyazawa

2015

Science and Technology of Advanced Materials

View full text Add to dashboard Cite

show abstract

“…From the structural observation using an electron microscope displays that the precipitates have quasi one-dimensionality and a variety of needles with different diameters can be produced. These materials are so called C 60 nanowhiskers [3][4][5][6] and are expected to give interesting electronic properties. So far, electronic properties of fullerene solids and the related materials upon chemical and physical doping have been studied by many researchers.…”

mentioning

confidence: 99%

Structure and Physical Properties of Doped C60 Whiskers

et al. 2007

Self Cite

View full text Add to dashboard Cite

Electric transport of C 60 nanowhiskers with I 2 doping is reported. The temperature evolution of electric conductivity shows that the temperature gradient of resistivity displays two or three transitions depending on the doping time and temperature. This unique feature is discussed by referring to the crystallographic studies of high resolution Xray diffraction (XRD).Fullerenes, carbon nanotubes and the related materials are greatly expected as new materials for electronic devices using nano technology. They have specific structures in the nano-scale size, and show a variety of electronic properties depending on the crystal structure as well as their chemical compositions. In addition, self-assembling in formation of these materials will provide feasibility for controlling accurate structure in nano scale. Being motivated by these situations, many researchers have been making intensive efforts for investigation and elucidation of physical and chemical properties of these materials. Recently, it was reported that crystallization of C 60 using the interfacial boundary in solution of two kind of solvents, such as toluene and isopropyl alcohol, yields needle like precipitates consisting of C 60 [1,2]. From the structural observation using an electron microscope displays that the precipitates have quasi one-dimensionality and a variety of needles with different diameters can be produced. These materials are so called C 60 nanowhiskers [3][4][5][6] and are expected to give interesting electronic properties. So far, electronic properties of fullerene solids and the related materials upon chemical and physical doping have been studied by many researchers. It has been understood that the C 60 solid is semiconducting and that the resistivity ρ of the pristine C 60 ranges from 10 8 to 10 14 Ω cm in solids and thin films. In this paper, we have investigated the electronic properties of C 60 nanowhiskers when they are intercalated by I 2 .Experimental C 60 nanowhisker samples were grown by a liquid-liquid interfacial precipitation method using toluene and isopropyl alcohol [3,4]. The obtained precipitates were thoroughly washed, and dried at room temperature. Figure1 shows the optical micrographs of an obtained sample. C 60 nanowhisker crystals are brownish in color, and C 60 bulk crystals also grew together with nanowhiskers (rod-like shape and black in color). C 60 bulk crystals were removed carefully, and only C 60 nanowhisker crystals were used for measurements. The C 60 nanowhisker sample was pelletized (ca.1.0x0.5x0.02mm) under hydrostatic pressure of 100MPa, and Au electrodes were fabricated on the pellet surface by an Au evaporation method. The pellet sample was then set into a glass cell for electric conductivity measurements, succeeding degassed at 393K in vacuo. After these pretreatments, small amounts of I 2 solid were set into the glass cell under an inert ECS Transactions, 6 (16) 73-77 (2007) 10.1149/1.2812898, © The Electrochemical Society 73 ) unless CC License in place (see abstract). ecsdl.org/site/terms_us...

show abstract

Challenges and breakthroughs in recent research on self-assembly

Ariga

Hill

Lee

et al. 2008

Science and Technology of Advanced Materials

735

410

View full text Add to dashboard Cite

The controlled fabrication of nanometer-scale objects is without doubt one of the central issues in current science and technology. However, existing fabrication techniques suffer from several disadvantages including size-restrictions and a general paucity of applicable materials. Because of this, the development of alternative approaches based on supramolecular self-assembly processes is anticipated as a breakthrough methodology. This review article aims to comprehensively summarize the salient aspects of self-assembly through the introduction of the recent challenges and breakthroughs in three categories: (i) types of self-assembly in bulk media; (ii) types of components for self-assembly in bulk media; and (iii) self-assembly at interfaces.

show abstract

Characterizing high-pressure compressed C₆₀ whiskers and C₆₀ powder

Cited by 6 publications

References 9 publications

Synthesis of fullerene nanowhiskers using the liquid–liquid interfacial precipitation method and their mechanical, electrical and superconducting properties

Synthesis of fullerene nanowhiskers using the liquid–liquid interfacial precipitation method and their mechanical, electrical and superconducting properties

Structure and Physical Properties of Doped C60 Whiskers

Challenges and breakthroughs in recent research on self-assembly

Contact Info

Product

Resources

About

Characterizing high-pressure compressed C60 whiskers and C60 powder

Cited by 6 publications

References 9 publications

Synthesis of fullerene nanowhiskers using the liquid–liquid interfacial precipitation method and their mechanical, electrical and superconducting properties

Synthesis of fullerene nanowhiskers using the liquid–liquid interfacial precipitation method and their mechanical, electrical and superconducting properties

Structure and Physical Properties of Doped C60 Whiskers

Challenges and breakthroughs in recent research on self-assembly

Contact Info

Product

Resources

About

Characterizing high-pressure compressed C₆₀ whiskers and C₆₀ powder