Preparation, structures and physical properties of κ-type two-dimensional conductors based on unsymmetrical extended tetrathiafulvalene: 2-cyclopentanylidene-1,3-dithiolo[4,5-d]-4,5-ethylenedithiotetrathiafulvalene (CPDTET)

1998 ◽  
Vol 8 (8) ◽  
pp. 1711-1717 ◽  
Author(s):  
Hideki Fujiwara ◽  
Yohji Misaki ◽  
Masateru Taniguchi ◽  
Tokio Yamabe ◽  
Tadashi Kawamoto ◽  
...  
Author(s):  
Xiaoqiu Guo ◽  
Ruixin Yu ◽  
Jingwen Jiang ◽  
Zhuang Ma ◽  
Xiuwen Zhang

Topological insulation is widely predicted in two-dimensional (2D) materials realized by epitaxial growth or van der Waals (vdW) exfoliation. Such 2D topological insulators (TI’s) host many interesting physical properties such...


2020 ◽  
Vol 4 (12) ◽  
pp. 3472-3486
Author(s):  
Xin Wei ◽  
Mingfeng Wang

Synthetic chemistry towards two-dimensional semiconducting polymers (2DSPs) with planar π-conjugated structures is reviewed and their unique chemical and physical properties derived from the extended π-conjugation are discussed.


1998 ◽  
Vol 67 (7) ◽  
pp. 2201-2204 ◽  
Author(s):  
Hidetaka Fukuda ◽  
Karim Kadir ◽  
Yasuyoshi Matsumoto ◽  
Takashi Suzuki ◽  
Hironobu Fujii ◽  
...  

Author(s):  
Wukui Zheng ◽  
Arho Suominen ◽  
Henrik Lagercrantz ◽  
Aulis Tuominen

Increasing the efficiency of passive fuel cells is a significant hurdle in commercializing small fuel cells. By understanding the interactions within a single cell, possibilities for further performance increases in fuel cell structures overall are uncovered. To investigate the multiphase flows and the interactions between the layers on the anode side of a direct methanol fuel cell (DMFC), a single cell was studied using a two-dimensional model. This multiphase model focuses on the flow mechanism of a single CO2 gas bubble. The model describes the mass transfer in a single cell by using the physical properties of a single bubble and by tracing its movement. The simulation results indicate that the thickness of a gas diffusion layer (GDL) has an effect on the CO2 bubble size at a low power output level. When the power output is increased, the porosity and the GDL’s contact angle with CO2 play a significant role in determining the size of the CO2 bubbles. The final bubble size and the time it takes for the bubbles to penetrate the layers of the DMFC are controlled by the physical properties of the GDL and by the power output. The model suggests that, to achieve optimal performance, the GDL in passive DMFCs should be thick enough to allow bubbles grow to their maximum size. The thickness of the GDL can be calculated by estimating the maximum size of the bubble.


Biomaterials ◽  
2007 ◽  
Vol 28 (14) ◽  
pp. 2264-2274 ◽  
Author(s):  
Géraldine Rohman ◽  
Jennifer J. Pettit ◽  
Françoise Isaure ◽  
Neil R. Cameron ◽  
Jennifer Southgate

1999 ◽  
Vol 259-261 ◽  
pp. 894-895
Author(s):  
H Fukuda ◽  
H Fujii ◽  
Y Matsumoto ◽  
T Suzuki ◽  
T Fujita ◽  
...  

2003 ◽  
Vol 56 (12) ◽  
pp. 1175 ◽  
Author(s):  
Jin-Hua Yang ◽  
Wei Li ◽  
Shao-Liang Zheng ◽  
Zhen-Li Huang ◽  
Xiao-Ming Chen

A cadmium coordination complex featuring novel Cd4(μ-O)4 cores, [Cd2(Hbna)(opy)(H2O)2] (1) (H4bna=2,2′-dihydroxy-[1,1′]-binaphthalene-3,3′-dicarboxylate acid; Hopy=1H-pyridine-2-one), has been hydrothermally synthesized and characterized. The Hbna ligand here acts in an unprecedented chelating/tridentate coordination mode for two carboxy groups with an additional μ-O-bridging coordination mode for the ortho-hydroxy oxygen atom. A study of the physical properties of solid (1) at room temperature demonstrates that it exhibits a moderately strong fluorescent emission in the blue-green region (about 538 nm), which can be assigned to LMCT emission.


2012 ◽  
Vol 26 (26) ◽  
pp. 1250152 ◽  
Author(s):  
BERNA GÜLVEREN

The Thomas–Fermi (TF) equation is solved numerically for an electron gas system that interacts via the Coulomb potential. An emphasis is placed on how certain physical properties, such as the chemical potential and the total energy, change with the shape of the confinement at finite temperatures. By comparing these results with the results calculated for the noninteracting case, we are able to analyze how the inter-particle forces affect the thermodynamic properties of electrons. It is shown that the total energy and other properties of an electron gas is very sensitive to the particle interactions and the shape of the confining potential, even at high temperatures. The results are also applicable to nanostructures like two-dimensional quantum dot systems, wires.


2015 ◽  
Vol 112 (40) ◽  
pp. E5471-E5477 ◽  
Author(s):  
Davide Michieletto ◽  
Davide Marenduzzo ◽  
Enzo Orlandini

Gel electrophoresis is a powerful experimental method to probe the topology of DNA and other biopolymers. Although there is a large body of experimental work that allows us to accurately separate different topoisomers of a molecule, a full theoretical understanding of these experiments has not yet been achieved. Here we show that the mobility of DNA knots depends crucially and subtly on the physical properties of the gel and, in particular, on the presence of dangling ends. The topological interactions between these and DNA molecules can be described in terms of an “entanglement number” and yield a nonmonotonic mobility at moderate fields. Consequently, in 2D electrophoresis, gel bands display a characteristic arc pattern; this turns into a straight line when the density of dangling ends vanishes. We also provide a novel framework to accurately predict the shape of such arcs as a function of molecule length and topological complexity, which may be used to inform future experiments.


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