scholarly journals Atomic-scale ion transistor with ultrahigh diffusivity

Science ◽  
2021 ◽  
Vol 372 (6541) ◽  
pp. 501-503
Author(s):  
Yahui Xue ◽  
Yang Xia ◽  
Sui Yang ◽  
Yousif Alsaid ◽  
King Yan Fong ◽  
...  
Keyword(s):  
Ion Transport ◽  
Energy Barrier ◽  
Critical Energy ◽  
Bulk Water ◽  
Atomic Scale ◽  
Optical Measurements ◽  
Threshold Behavior ◽  
Ion Diffusion ◽  
Reduced Graphene

Biological ion channels rapidly and selectively gate ion transport through atomic-scale filters to maintain vital life functions. We report an atomic-scale ion transistor exhibiting ultrafast and highly selective ion transport controlled by electrical gating in graphene channels around 3 angstroms in height, made from a single flake of reduced graphene oxide. The ion diffusion coefficient reaches two orders of magnitude higher than the coefficient in bulk water. Atomic-scale ion transport shows a threshold behavior due to the critical energy barrier for hydrated ion insertion. Our in situ optical measurements suggest that ultrafast ion transport likely originates from highly dense packing of ions and their concerted movement inside the graphene channels.

Reduced graphene oxide hydrogel film with a continuous ion transport network for supercapacitors

Nanoscale ◽  
2015 ◽  
Vol 7 (8) ◽  
pp. 3712-3718 ◽  
Author(s):  
Xiayu Feng ◽  
Wufeng Chen ◽  
Lifeng Yan
Keyword(s):  
Graphene Oxide ◽  
Ion Transport ◽  
Electrochemical Reduction ◽  
Reduced Graphene Oxide ◽  
Transport Network ◽  
Hydrogel Film ◽  
Reduced Graphene

In situelectrochemical reduction of the as-formed GO hydrogel film and the fabrication of a supercapactior using the obtained non-stacking ERGO hydrogel film.

scholarly journals High-rate in-plane micro-supercapacitors scribed onto photo paper using in situ femtolaser-reduced graphene oxide/Au nanoparticle microelectrodes

2016 ◽  
Vol 9 (4) ◽  
pp. 1458-1467 ◽  
Author(s):  
R.-Z. Li ◽  
Rui Peng ◽  
K. D. Kihm ◽  
S. Bai ◽  
D. Bridges ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
High Rate ◽  
Au Nanoparticle ◽  
Ion Diffusion ◽  
Reduced Graphene ◽  
Direct Laser ◽  
Fast Ion ◽  
Laser Reduction

Direct laser-reduction of graphene oxide (GO), as a lithography-free approach, has been proven effective in manufacturing in-plane micro-supercapacitors (MSCs) with fast ion diffusion.

scholarly journals In Situ Observation of Electron-Beam-Induced Formation of Nano-Structures in PbTe

Nanomaterials ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 163
Author(s):  
Iryna Zelenina ◽  
Igor Veremchuk ◽  
Yuri Grin ◽  
Paul Simon
Keyword(s):  
Electron Beam ◽  
Gas Phase ◽  
Threshold Current ◽  
Threshold Current Density ◽  
Atomic Scale ◽  
In Situ Observation ◽  
Nano Structures ◽  
Transmission Electron ◽  
Initial Crystal

Nano-scaled thermoelectric materials attract significant interest due to their improved physical properties as compared to bulk materials. Well-shaped nanoparticles such as nano-bars and nano-cubes were observed in the known thermoelectric material PbTe. Their extended two-dimensional nano-layer arrangements form directly in situ through electron-beam treatment in the transmission electron microscope. The experiments show the atomistic depletion mechanism of the initial crystal and the recrystallization of PbTe nanoparticles out of the microparticles due to the local atomic-scale transport via the gas phase beyond a threshold current density of the beam.

scholarly journals Epitaxial Crystallization of Poly(ε-caprolactone) on Reduced Graphene Oxide at a Low Shear Rate by In Situ SAXS/WAXD Methods

ACS Omega ◽  
2020 ◽  
Vol 5 (49) ◽  
pp. 31535-31542
Author(s):  
Weijun Miao ◽  
Feng Wu ◽  
Shiman Zhou ◽  
Guibin Yao ◽  
Yiguo Li ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Shear Rate ◽  
Reduced Graphene Oxide ◽  
Epitaxial Crystallization ◽  
Reduced Graphene ◽  
Low Shear
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