scholarly journals Tuning graphene transistors through ad hoc electrostatics induced by a nanometer-thick molecular underlayer

Nanoscale ◽  
2019 ◽  
Vol 11 (42) ◽  
pp. 19705-19712 ◽  
Author(s):  
Ather Mahmood ◽  
Cheol-Soo Yang ◽  
Seunghun Jang ◽  
Lucie Routaboul ◽  
Hyunju Chang ◽  
...  
Keyword(s):  
Electric Field ◽  
Low Temperatures ◽  
Ad Hoc ◽  
Dipolar Molecules

A graphene transistor can reveal the ordering of dipolar molecules forming a nm-thick underlayer, stabilized under an electric field at low temperatures.

The Hertzian Spectrum of Rubber and Its Micellar Constitution

1946 ◽  
Vol 19 (4) ◽  
pp. 1085-1087
Author(s):  
Pierre Girard ◽  
Paul Abadie
Keyword(s):  
Dielectric Constant ◽  
Electric Field ◽  
Wave Length ◽  
Structural Features ◽  
Loss Angle ◽  
First Case ◽  
Dipolar Molecules ◽  
Alternating Electric Field ◽  
Different Types ◽  
Absorption And Dispersion

Abstract The spectra which were studied lie within the region of hertzian frequencies, and can be represented either by dispersion curves showing the dielectric constant of the substance as a function of the frequency (or wave length λ), or by absorption curves showing the loss angle as a function of this frequency. These two types of curves represent the same phenomenon, i.e., orientation of the dipolar molecules in the alternating electric field, in accordance with the theory of Debye. The spectra and their interpretation depend chiefly on whether the molecules are crystalloid with relatively small and similar dimensions, or are colloidal, with large and unequal dimensions. In the first case, the spectra gives evidence chiefly on the form of the molecules and their structural features. Dilution in a nonpolar solvent shows for certain dipolar compounds, e.g., alcohol, considerable deformations, which differ according to the solvent. In the case of colloids, e.g., rubber, which has a permanent moment, the spectra and the meaning of these spectra are far different. In this case the spectra indicate that the absorption and dispersion values in the hertzian region are closely related to the micellar constitution, i.e., to the different types of micelles, to their size, and to the proportion of each type.

scholarly journals Electrical Promotion-Assisted Automotive Exhaust Catalyst: Highly Active and Selective NO Reduction to N2 at Low-Temperatures

2021 ◽  
Author(s):  
Yuki Omori ◽  
Ayaka Shigemoto ◽  
Kohei Sugihara ◽  
Takuma Higo ◽  
Toru Uenishi ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Low Temperature ◽  
Electric Field ◽  
Low Temperatures ◽  
No Reduction ◽  
Lattice Oxygen ◽  
Pd Catalyst ◽  
Highly Active ◽  
Automotive Exhaust Catalyst ◽  
Activated Surface

Pd catalyst (Pd/Ce<sub>0.7</sub>Zr<sub>0.3</sub>O<sub>2</sub>) in an electric field exhibits extremely high three-way catalytic activity (TWC: NO-C<sub>3</sub>H<sub>6</sub>-CO-O<sub>2</sub>-H<sub>2</sub>O). By applying an electric field to the semiconductor catalyst, low-temperature operation of TWC can be achieved even at 473 K by virtue of the activated surface-lattice oxygen.

Ultrafast joining of zirconia ceramics using electric field at low temperatures

2019 ◽  
Vol 39 (10) ◽  
pp. 3173-3179 ◽  
Author(s):  
Junbo Xia ◽  
Ke Ren ◽  
Wen Liu ◽  
Yiguang Wang
Keyword(s):  
Electric Field ◽  
Low Temperatures ◽  
Zirconia Ceramics

scholarly journals How to control single-molecule rotation

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Grant J. Simpson ◽  
Víctor García-López ◽  
A. Daniel Boese ◽  
James M. Tour ◽  
Leonhard Grill
Keyword(s):  
Electric Field ◽  
Single Molecule ◽  
Scanning Tunneling Microscope ◽  
Specific Interaction ◽  
Scanning Tunneling ◽  
Individual Molecule ◽  
Pivot Point ◽  
Dipolar Molecules ◽  
At Will ◽  
Orientation Of Molecules

Abstract The orientation of molecules is crucial in many chemical processes. Here, we report how single dipolar molecules can be oriented with maximum precision using the electric field of a scanning tunneling microscope. Rotation is found to occur around a fixed pivot point that is caused by the specific interaction of an oxygen atom in the molecule with the Ag(111) surface. Both directions of rotation are realized at will with 100% directionality. Consequently, the internal dipole moment of an individual molecule can be spatially mapped via its behavior in an applied electric field. The importance of the oxygen-surface interaction is demonstrated by the addition of a silver atom between a single molecule and the surface and the consequent loss of the pivot point.

External electric field promotes proton transfer in the radical cation of adenine–thymine

2016 ◽  
Vol 30 (21) ◽  
pp. 1650276 ◽  
Author(s):  
Guiqing Zhang ◽  
Shijie Xie
Keyword(s):  
Electric Field ◽  
Proton Transfer ◽  
External Electric Field ◽  
Radical Cation ◽  
Base Pair ◽  
Low Temperatures ◽  
Room Temperature ◽  
Theoretical Calculations ◽  
Base Pairs ◽  
Adenine Thymine

According to [Formula: see text] measurements, it has been predicted that proton transfer would not occur in the radical cation of adenine–thymine (A:T). However, recent theoretical calculations indicate that proton transfer takes place in the base pair in water below the room temperature. We have performed simulations of proton transfer in the cation of B-DNA stack composed of 10 A:T base pairs in water from 20 K to 300 K. Proton transfer occurs below the room temperature, meanwhile it could also be observed at the room temperature under the external electric field. Another case that interests us is that proton transfer bounces back after [Formula: see text][Formula: see text]300 fs from the appearance of proton transfer at low temperatures.

scholarly journals Anomalous Behaviour of the Electric Field in Highly-Compensated Non-Uniform Semiconductors at Low Temperatures

1996 ◽  
Vol 06 (C3) ◽  
pp. C3-99-C3-103
Author(s):  
J. A. Jiménez-Tejada ◽  
A. Palma ◽  
A. Godoy ◽  
J. E. Carceller
Keyword(s):  
Electric Field ◽  
Low Temperatures ◽  
Anomalous Behaviour

scholarly journals Modified Josephson Relation

2003 ◽  
Vol 17 (18n20) ◽  
pp. 3407-3410
Author(s):  
Jan Koláček ◽  
Pavel Lipavský
Keyword(s):  
Electric Field ◽  
Low Temperatures ◽  
Ohmic Contacts ◽  
Chemical Potential ◽  
Electrochemical Potential ◽  
Type Ii ◽  
Type Ii Superconductors ◽  
Effective Electric Field

For type II superconductors, Josephson has shown that vortices moving with velocity v L create an effective electric field E′= -v L ×B V . By definition the effective electric field is gradient of the electrochemical potential, what is the quantity corresponding to voltage observed with the use of Ohmic contacts. It relates to the true electric field E via the local chemical potential μ as E′=E-∇μ/e. We argue that at low temperatures the true electric field in the bulk can be approximated by a modified Josephson relation E=(v S -v L )×B V , where v S is the condensate velocity.

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