scholarly journals Planar Graphene‐Based Microsupercapacitors (Small 48/2021)

Small ◽  
2021 ◽  
Vol 17 (48) ◽  
pp. 2170254
Author(s):  
Bing Lu ◽  
Xuting Jin ◽  
Qing Han ◽  
Liangti Qu
Keyword(s):  
Planar Graphene

scholarly journals Short Ballistic Josephson Coupling in Planar Graphene Junctions with Inhomogeneous Carrier Doping

2018 ◽  
Vol 120 (7) ◽  
Author(s):  
Jinho Park ◽  
Jae Hyeong Lee ◽  
Gil-Ho Lee ◽  
Yositake Takane ◽  
Ken-Ichiro Imura ◽  
...  
Keyword(s):  
Josephson Coupling ◽  
Carrier Doping ◽  
Planar Graphene

scholarly journals How much graphene in space?

2019 ◽  
Vol 490 (3) ◽  
pp. 3875-3881 ◽  
Author(s):  
Qi Li ◽  
Aigen Li ◽  
B W Jiang
Keyword(s):  
Energy Range ◽  
Interband Transition ◽  
Interstellar Extinction ◽  
Extinction Curve ◽  
Previous Estimate ◽  
Upper Limit ◽  
Vibrational Bands ◽  
Ir Emission ◽  
Electron Energy Loss ◽  
Planar Graphene

ABSTRACT The possible presence of graphene in the interstellar medium (ISM) is examined by comparing the interstellar extinction curve with the ultraviolet absorption of graphene calculated from its dielectric functions experimentally obtained with the electron energy loss spectroscopy (EELS) method. Based on the absence in the interstellar extinction curve of the $\sim \! 2755\, {\rm \mathring{\rm A} }$ π–π* electronic interband transition of graphene, we place an upper limit of $\sim \! 20\, {\rm ppm}$ of C/H on the interstellar graphene abundance, exceeding the previous estimate by a factor of $\sim \,$3 which made use of the dielectric functions measured with the spectroscopic ellipsometry (SE) method. Compared with the SE method which measures graphene in air (and hence its surface is contaminated) in a limited energy range of $\sim \,$0.7–5 $\, {\rm eV}$, the EELS probes a much wider energy range of $\sim \,$0–50 $\, {\rm eV}$ and is free of contamination. The fact that the EELS dielectric functions are substantially smaller than that of SE naturally explains why a higher upper limit on the graphene abundance is derived with EELS. Inspired by the possible detection of C24, a planar graphene sheet, in several Galactic and extragalactic planetary nebulae, we also examine the possible presence of C24 in the diffuse ISM by comparing the model IR emission of C24 with the observed IR emission of the Galactic cirrus and the diffuse ISM towards l = 44°20′ and b = −0°20′. An upper limit of $\sim \!20\, {\rm ppm}$ on C24 is also derived from the absence of the characteristic vibrational bands of C24 at $\sim \,$6.6, 9.8, and 20 $\, {\rm \mu m}$ in the observed IR emission.

scholarly journals Planar graphene-narrow-gap semiconductor-graphene heterostructure

2008 ◽  
Vol 35 (11) ◽  
pp. 328-335 ◽  
Author(s):  
P. V. Ratnikov ◽  
A. P. Silin
Keyword(s):  
Narrow Gap ◽  
Planar Graphene

Nonreciprocal and Control THz Components Based on Planar Graphene Structures

2018 ◽  
Author(s):  
Victor Dmitriev ◽  
Wagner Castro ◽  
Samara Matos ◽  
Francisco Nobre ◽  
Tiago Oliveira ◽  
...  
Keyword(s):  
And Control ◽  
Graphene Structures ◽  
Planar Graphene

scholarly journals Spatial integration by a dielectric slab and its planar graphene-based counterpart

2017 ◽  
Vol 42 (10) ◽  
pp. 1954 ◽  
Author(s):  
Farzad Zangeneh-Nejad ◽  
Amin Khavasi
Keyword(s):  
Dielectric Slab ◽  
Spatial Integration ◽  
Planar Graphene

Tunable Electroluminescence in Planar Graphene/SiO2Memristors

2013 ◽  
Vol 25 (39) ◽  
pp. 5593-5598 ◽  
Author(s):  
Congli He ◽  
Jiafang Li ◽  
Xing Wu ◽  
Peng Chen ◽  
Jing Zhao ◽  
...  
Keyword(s):  
Planar Graphene
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