Electrical properties of fullerenol C60(OH)10/Au interface

Sakaino, Masamichi; Sun, Yong; Morimoto, Fumio

doi:10.1063/1.4861184

Cited by 7 publications

(5 citation statements)

References 26 publications

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“…% was purchased from LUNA Innovations to make a sample specimen for measurement. 18,19 The Er 3 N@C 80 powder was pressed into a pellet at room temperature at 1.25 GPa for 50 min. The so formed pellet was 5.0 mm in diameter and 0.55 mm in thickness.…”

Section: Methodsmentioning

confidence: 99%

Carrier transport properties of nanocrystalline Er3N@C80

Sun

Maeda

Sezaimaru

et al. 2014

Journal of Applied Physics

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Electrical transport properties of the nanocrystalline Er 3 N@C 80 with fcc crystal structure were characterized by measuring both temperature-dependent d.c. conductance and a.c. impedance. The results showed that the Er 3 N@C 80 sample has characteristics of n-type semiconductor and an electron affinity larger than work function of gold metal. The Er 3 N@C 80 /Au interface has an ohmic contact behavior and the contact resistance was very small as compared with bulk resistance of the Er 3 N@C 80 sample. The charge carriers in the sample were thermally excited from various trapped levels and both acoustic phonon and ionic scatterings become a dominant process in different temperature regions, respectively. At temperatures below 250 K, the activation energy of the trapped carrier was estimated to be 35.5 meV, and the ionic scattering was a dominant mechanism. On the other hand, at temperatures above 350 K, the activation energy was reduced to 15.9 meV, and the acoustic phonon scattering was a dominant mechanism. In addition, a polarization effect from the charge carrier was observed at low frequencies below 2.0 MHz, and the relative intrinsic permittivity of the Er 3 N@C 80 nanocrystalline lattice was estimated to be 4.6 at frequency of 5.0 MHz.

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Section: Methodsmentioning

confidence: 99%

Carrier transport properties of nanocrystalline Er3N@C80

Sun

Maeda

Sezaimaru

et al. 2014

Journal of Applied Physics

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“…In previous works [11], we have reported that Schottky barrier of the C 60 (OH) 10 /Au contact was 0.70 ± 0.02 eV and no significant effect of the applied electric field was observed on the barrier height.…”

Section: Introductionmentioning

confidence: 75%

Dielectric Properties of Au/C60 (OH) 24-26/Au Structure

Sun¹,

Kanemitsu²,

Kirimoto³

2015

PAMJ

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Dielectric properties of the Au/C 60 (OH) 24-26 /Au structure were studied by measuring a.c. impedance and d.c. current in a wide temperature range. Three dielectric response characteristics were identified from Cole-Cole plots of a.c. impedance and dielectric dissipation factor of the structure. First, the bulk resistance and capacitance of the structure were observed at frequencies below 10 Hz, regardless of preparation condition of the Au electrode. Secondly, an interfacial characteristic of the Au foil/C 60 (OH) 24-26 contact was observed as a peak of dielectric dissipation factor at frequency of 200 Hz. Thirdly, an interfacial characteristic of the Au paste/C 60 (OH) 24-26 contact was also observed as a peak of dielectric dissipation factor at frequency of 1.7 × 10 Hz.

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“…On the contrary, fullerenol [C 60 (OH)] displayed amorphous characteristics, indicated by a broad hump at a 2 θ value of around 32° in the X‐ray diffraction (XRD) pattern (Figure 1c). The crystallinity of C 60 (OH) is very poor compared to that of fullerenes [21,22] . Interestingly, the initially poor crystallinity transformed into a highly crystalline material upon pyrolysis at 600 °C, as shown by the sharp and intense diffraction patterns (Figure 1c).…”

Section: Resultsmentioning

confidence: 98%

“…The crystallinity of C 60 (OH) is very poor compared to that of fullerenes. [21,22] Interestingly, the initially poor crystallinity transformed into a highly crystalline material upon pyrolysis at 600 °C, as shown by the sharp and intense diffraction patterns (Figure 1c). Pyrolyzing fullerenol at 900 °C caused structural degradation where almost no functional group was detected through Fourier-transform infrared (FTIR) spectroscopy (Figures S3 and S4).…”

Section: Resultsmentioning

confidence: 98%

Multistep Transformation from Amorphous and Nonporous Fullerenols to Highly Crystalline Microporous Materials

Hardian

Székely

2022

ChemSusChem

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The structural and morphological properties of fullerenols upon exposure to heat treatment have yet to be understood. Herein, the temperature‐driven structural and morphological evolutions of fullerenols C60(OH) and C70(OH) were investigated. In situ spectroscopic techniques, such as variable‐temperature X‐ray diffraction and coupled thermogravimetric Fourier‐transform infrared analysis, were used to elucidate the structural transformation mechanism of fullerenols. Both fullerenols underwent four‐step structural transformation upon heating and cooling, including amorphous‐to‐crystalline transition, thermal expansion, structural compression, and new crystal formation. Compared to the initially nonporous amorphous fullerenol, the crystalline product exhibited microporosity with a surface area of 114 m2 g−1 and demonstrated CO2 sorption capability. These findings show the potential of fullerene derivatives as adsorbents.

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Electrical properties of fullerenol C60(OH)10/Au interface

Cited by 7 publications

References 26 publications

Carrier transport properties of nanocrystalline Er3N@C80

Carrier transport properties of nanocrystalline Er3N@C80

Dielectric Properties of Au/C60 (OH) 24-26/Au Structure

Multistep Transformation from Amorphous and Nonporous Fullerenols to Highly Crystalline Microporous Materials

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