134 research outputs found
Π’ΠΈΠΏΡ ΠΎΡΠ½ΠΎΡΠ΅Π½ΠΈΡ ΠΊ Π±ΠΎΠ»Π΅Π·Π½ΠΈ Ρ ΠΏΠ°ΡΠΈΠ΅Π½ΡΠΎΠ² Ρ ΠΆΠ΅Π»ΡΠ½ΠΎΠΊΠ°ΠΌΠ΅Π½Π½ΠΎΠΉ Π±ΠΎΠ»Π΅Π·Π½ΡΡ
ΠΠΠΠ§ΠΠΠΠΠΠΠΠΠΠ― ΠΠΠΠΠΠΠ¬ΠΠΠΠ§ΠΠ«Π₯ ΠΠ£Π’ΠΠ ΠΠΠΠΠΠΠΡΠ΅ΡΡΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅ΠΠΠΠΠΠΠ¬ΠΠ«ΠΠΠΠ ΠΠΠΠΠΠΠΠΏΡΠΈΡ
ΠΎΡΠΌΠΎΡΠΈΠΎΠ½Π°Π»ΡΠ½ΡΠ΅ ΡΠ°ΠΊΡΠΎΡΡΠΏΡΠΈΡ
ΠΎΠ΄ΠΈΠ°Π³Π½ΠΎΡΡΠΈΠΊ
Π Π΅Π°ΠΊΡΠΈΡ ΠΌΠ°Π»ΠΎΠ³ΠΎ ΠΈ ΡΡΠ΅Π΄Π½Π΅Π³ΠΎ Π±ΠΈΠ·Π½Π΅ΡΠ° Π½Π° ΠΊΠΎΡΠΎΠ½Π°ΠΊΡΠΈΠ·ΠΈΡ: Π²Π»ΠΈΡΠ½ΠΈΠ΅ ΠΎΡΠ³Π°Π½ΠΎΠ² Π²Π»Π°ΡΡΠΈ ΡΡΠ±ΡΠ΅ΠΊΡΠΎΠ² Π€Π΅Π΄Π΅ΡΠ°ΡΠΈΠΈ
Π‘ΠΎΠΊΡΠ°ΡΠ΅Π½ΠΈΠ΅ Π΄Π΅Π»ΠΎΠ²ΠΎΠΉ Π°ΠΊΡΠΈΠ²Π½ΠΎΡΡΠΈ Π² ΡΠΎΡΡΠΈΠΉΡΠΊΠΎΠΉ ΡΠΊΠΎΠ½ΠΎΠΌΠΈΠΊΠ΅, Π²ΡΠ·Π²Π°Π½Π½ΠΎΠ΅ Π°Π½ΡΠΈΠΊΠΎΠ²ΠΈΠ΄Π½ΡΠΌΠΈ ΠΎΠ³ΡΠ°Π½ΠΈΡΠ΅Π½ΠΈΡΠΌΠΈ, ΠΎΠΊΠ°Π·Π°Π»ΠΎΡΡ Π·Π½Π°ΡΠΈΡΠ΅Π»ΡΠ½ΠΎ ΠΌΠ΅Π½ΡΡΠ΅ ΠΏΡΠΎΠ³Π½ΠΎΠ·ΠΈΡΡΠ΅ΠΌΠΎΠ³ΠΎ ΠΌΠ΅ΠΆΠ΄ΡΠ½Π°ΡΠΎΠ΄Π½ΡΠΌΠΈ ΡΠΈΠ½Π°Π½ΡΠΎΠ²ΡΠΌΠΈ ΠΈΠ½ΡΡΠΈΡΡΡΠ°ΠΌΠΈ. ΠΠ°ΠΆΠ΅ ΡΠ΅ΠΊΡΠΎΡ ΠΌΠ°Π»ΠΎΠ³ΠΎ ΠΈ ΡΡΠ΅Π΄Π½Π΅Π³ΠΎ ΠΏΡΠ΅Π΄ΠΏΡΠΈΠ½ΠΈΠΌΠ°ΡΠ΅Π»ΡΡΡΠ²Π°, ΠΈΡΠΏΡΡΠ°Π²ΡΠΈΠΉ ΡΡΡΠ΅ΡΡΠ²Π΅Π½Π½ΡΠΉ ΡΠΏΠ°Π΄, Π² 2021 Π³. ΠΏΡΠΎΠ΄Π΅ΠΌΠΎΠ½ΡΡΡΠΈΡΠΎΠ²Π°Π» Π²ΠΎΡΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΈΠ΅ ΠΈ ΡΡΡΠΎΠΉΡΠΈΠ²ΠΎΡΡΡ Π½Π°ΠΌΠ΅ΡΠ΅Π½ΠΈΠΉ Π²Π΅ΡΡΠΈ Π±ΠΈΠ·Π½Π΅Ρ. ΠΠ°Π½Π½ΠΎΠ΅ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠ΅ ΡΡΠ°Π²ΠΈΡ ΡΠ΅Π»ΡΡ Π²ΡΡΡΠ½ΠΈΡΡ, ΠΊΠ°ΠΊ ΠΏΠΎΠ²Π»ΠΈΡΠ»ΠΈ ΡΠ΅Π³ΠΈΠΎΠ½Π°Π»ΡΠ½ΡΠ΅ Π²Π»Π°ΡΡΠΈ Π½Π° Π°ΠΊΡΠΈΠ²Π½ΠΎΡΡΡ ΠΌΠ°Π»ΠΎΠ³ΠΎ ΠΈ ΡΡΠ΅Π΄Π½Π΅Π³ΠΎ Π±ΠΈΠ·Π½Π΅ΡΠ° Π² ΠΏΠ΅ΡΠΈΠΎΠ΄ ΠΊΡΠΈΠ·ΠΈΡΠ° ΠΈ ΠΊΠ°ΠΊ ΡΡΠΎ Π²Π»ΠΈΡΠ½ΠΈΠ΅ ΡΠΎΡΠ΅ΡΠ°Π»ΠΎΡΡ Ρ ΡΠΎΠ±ΡΡΠ²Π΅Π½Π½ΡΠΌΠΈ ΡΡΠΈΠ»ΠΈΡΠΌΠΈ ΠΏΡΠ΅Π΄ΠΏΡΠΈΠ½ΠΈΠΌΠ°ΡΠ΅Π»Π΅ΠΉ ΠΈ ΡΠΊΠΎΠ½ΠΎΠΌΠΈΡΠ΅ΡΠΊΠΎΠΉ ΡΠ²ΠΎΠ±ΠΎΠ΄ΠΎΠΉ Π² ΡΠ΅Π³ΠΈΠΎΠ½Π΅. ΠΠ»Ρ ΡΡΠΎΠ³ΠΎ Π² ΡΠ°Π±ΠΎΡΠ΅ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½Π° ΠΌΠ΅ΡΠΎΠ΄ΠΎΠ»ΠΎΠ³ΠΈΡ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°ΡΠ΅Π»ΡΡΠΊΠΎΠ³ΠΎ ΠΊΠ΅ΠΉΡΠ° Π½Π° ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»Π°Ρ
Π‘Π²Π΅ΡΠ΄Π»ΠΎΠ²ΡΠΊΠΎΠΉ ΠΎΠ±Π»Π°ΡΡΠΈ β ΠΊΡΡΠΏΠ½ΠΎΠ³ΠΎ ΡΠΎΡΡΠΈΠΉΡΠΊΠΎΠ³ΠΎ ΡΠ΅Π³ΠΈΠΎΠ½Π° Ρ Π΄ΠΈΠ²Π΅ΡΡΠΈΡΠΈΡΠΈΡΠΎΠ²Π°Π½Π½ΠΎΠΉ ΠΎΡΡΠ°ΡΠ»Π΅Π²ΠΎΠΉ ΡΡΡΡΠΊΡΡΡΠΎΠΉ ΠΈ ΡΠ°Π·Π²ΠΈΡΡΠΌ ΡΠ΅ΠΊΡΠΎΡΠΎΠΌ ΠΌΠ°Π»ΠΎΠ³ΠΎ ΠΈ ΡΡΠ΅Π΄Π½Π΅Π³ΠΎ ΠΏΡΠ΅Π΄ΠΏΡΠΈΠ½ΠΈΠΌΠ°ΡΠ΅Π»ΡΡΡΠ²Π°. Π ΡΠ°ΠΌΠΊΠ°Ρ
ΠΊΠ΅ΠΉΡ-ΡΡΠ°Π΄ΠΈ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΎ ΡΠΎΡΠ΅ΡΠ°Π½ΠΈΠ΅ ΠΊΠ°ΡΠ΅ΡΡΠ²Π΅Π½Π½ΡΡ
ΠΌΠ΅ΡΠΎΠ΄ΠΎΠ² ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ (ΠΏΠΎΠ»ΡΡΡΡΡΠΊΡΡΡΠΈΡΠΎΠ²Π°Π½Π½ΡΠ΅ ΠΈΠ½ΡΠ΅ΡΠ²ΡΡ Ρ ΡΡΠΊΠΎΠ²ΠΎΠ΄ΠΈΡΠ΅Π»ΡΠΌΠΈ ΠΊΠΎΠΌΠΏΠ°Π½ΠΈΠΉ Π΄Π»Ρ Π²ΡΡΠ²Π»Π΅Π½ΠΈΡ Π³Π»ΡΠ±ΠΈΠ½Π½ΡΡ
ΠΌΠΎΡΠΈΠ²ΠΎΠ² Π΄Π΅ΡΡΠ΅Π»ΡΠ½ΠΎΡΡΠΈ ΠΈ ΡΠ°Π·Π½ΠΎΠΎΠ±ΡΠ°Π·ΠΈΡ ΡΠ΅Π°ΠΊΡΠΈΠΈ Π±ΠΈΠ·Π½Π΅ΡΠ° Π½Π° Π²Π½Π΅ΡΠ½ΠΈΠ΅ Π²ΡΠ·ΠΎΠ²Ρ) Ρ ΠΊΠΎΠ»ΠΈΡΠ΅ΡΡΠ²Π΅Π½Π½ΡΠΌΠΈ ΠΌΠ΅ΡΠΎΠ΄Π°ΠΌΠΈ (ΡΠ°ΡΡΡΠΈΡΠ°Π½ ΠΈΠ½Π΄Π΅ΠΊΡ ΡΠΊΠΎΠ½ΠΎΠΌΠΈΡΠ΅ΡΠΊΠΎΠΉ ΡΠ²ΠΎΠ±ΠΎΠ΄Ρ Π² ΡΠ΅Π³ΠΈΠΎΠ½Π΅ Π·Π° 2002β2020 Π³Π³. ΠΏΠΎ ΠΌΠ΅ΡΠΎΠ΄ΠΈΠΊΠ΅ Π. ΠΠΎΡΡΡΠ°, Π° ΡΠ°ΠΊΠΆΠ΅ Ρ ΠΏΠΎΠΌΠΎΡΡΡ ΡΠ΅Π³ΡΠ΅ΡΡΠΈΠΎΠ½Π½ΠΎΠ³ΠΎ Π°Π½Π°Π»ΠΈΠ·Π° ΠΏΠΎ ΠΌΠ΅ΡΠΎΠ΄Ρ ΠΠΠ ΠΎΡΠ΅Π½Π΅Π½Π° Π²Π·Π°ΠΈΠΌΠΎΡΠ²ΡΠ·Ρ ΠΌΠ΅ΠΆΠ΄Ρ ΠΏΡΠ΅Π΄ΠΏΡΠΈΠ½ΠΈΠΌΠ°ΡΠ΅Π»ΡΡΠΊΠΎΠΉ Π°ΠΊΡΠΈΠ²Π½ΠΎΡΡΡΡ Π² Π‘Π²Π΅ΡΠ΄Π»ΠΎΠ²ΡΠΊΠΎΠΉ ΠΎΠ±Π»Π°ΡΡΠΈ ΠΈ Π²ΠΌΠ΅ΡΠ°ΡΠ΅Π»ΡΡΡΠ²ΠΎΠΌ Π³ΠΎΡΡΠ΄Π°ΡΡΡΠ²Π° Π² ΡΠΊΠΎΠ½ΠΎΠΌΠΈΠΊΡ ΡΠ΅Π³ΠΈΠΎΠ½Π°). ΠΠ±Π½Π°ΡΡΠΆΠ΅Π½ΠΎ, ΡΡΠΎ ΡΠΈΡΠ»Π΅Π½Π½ΠΎΡΡΡ ΠΠ ΡΠ²ΡΠ·Π°Π½Π° Ρ ΡΡΠ°ΡΡΠΈΠ΅ΠΌ Π³ΠΎΡΡΠ΄Π°ΡΡΡΠ²Π° Π² ΡΠΊΠΎΠ½ΠΎΠΌΠΈΠΊΠ΅ ΡΠ΅Π³ΠΈΠΎΠ½Π°, Π² ΡΠΎ Π²ΡΠ΅ΠΌΡ ΠΊΠ°ΠΊ Π°ΠΊΡΠΈΠ²Π½ΠΎΡΡΡ ΡΡΠΈΠ΄ΠΈΡΠ΅ΡΠΊΠΈΡ
Π»ΠΈΡ ΠΈΠ· ΡΡΠ΅ΡΡ ΠΠ‘Π Π² Π±ΠΎΠ»ΡΡΠ΅ΠΉ ΠΌΠ΅ΡΠ΅ ΡΠ²ΡΠ·Π°Π½Π° Ρ ΡΠΊΠΎΠ½ΠΎΠΌΠΈΡΠ΅ΡΠΊΠΎΠΉ ΡΠ²ΠΎΠ±ΠΎΠ΄ΠΎΠΉ. Π‘ΠΎΠΊΡΠ°ΡΠ΅Π½ΠΈΠ΅ ΠΈ ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΠ΅ ΡΡΡΡΠΊΡΡΡΡ ΡΠΏΡΠΎΡΠ°, ΠΏΠ°Π΄Π΅Π½ΠΈΠ΅ ΡΠ΅Π°Π»ΡΠ½ΡΡ
Π΄ΠΎΡ
ΠΎΠ΄ΠΎΠ² Π½Π°ΡΠ΅Π»Π΅Π½ΠΈΡ, ΠΎΠ³ΡΠ°Π½ΠΈΡΠ΅Π½ΠΈΡ Π½Π° ΡΡΠ°Π½ΡΠ³ΡΠ°Π½ΠΈΡΠ½ΡΠ΅ ΠΎΠΏΠ΅ΡΠ°ΡΠΈΠΈ ΠΈ ΡΠ°ΡΡΡΡΠ°Ρ ΠΊΠΎΠ½ΡΠ΅Π½ΡΡΠ°ΡΠΈΡ ΡΡΠ½ΠΎΡΠ½ΠΎΠΉ Π²Π»Π°ΡΡΠΈ Π² ΠΊΡΠΈΠ·ΠΈΡΠ½ΡΠΉ ΠΏΠ΅ΡΠΈΠΎΠ΄ ΡΡΠΊΠΎΡΠΈΠ»ΠΈ ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΠ΅ Π±ΠΈΠ·Π½Π΅Ρ-ΠΌΠΎΠ΄Π΅Π»Π΅ΠΉ ΠΊΠΎΠΌΠΏΠ°Π½ΠΈΠΉ Π² ΡΠ°ΡΡΠΈ Π²Π·Π°ΠΈΠΌΠΎΠ΄Π΅ΠΉΡΡΠ²ΠΈΡ Ρ ΠΊΠ»ΠΈΠ΅Π½ΡΠ°ΠΌΠΈ, ΡΠ΅Π½Π½ΠΎΡΡΠ½ΠΎΠ³ΠΎ ΠΏΡΠ΅Π΄Π»ΠΎΠΆΠ΅Π½ΠΈΡ, ΡΠ΅ΡΠ΅Π²ΠΈΠ·Π°ΡΠΈΠΈ ΠΈ ΡΠΈΡΡΠΎΠ²ΠΈΠ·Π°ΡΠΈΠΈ Π±ΠΈΠ·Π½Π΅ΡΠ°, Π° ΡΠ°ΠΊΠΆΠ΅ ΡΠΎΡΡΠ° ΡΠΎΠ»ΠΈ Π±ΠΈΠ·Π½Π΅Ρ-Π°ΡΡΠΎΡΠΈΠ°ΡΠΈΠΉ Π²ΠΎ Π²Π·Π°ΠΈΠΌΠΎΠ΄Π΅ΠΉΡΡΠ²ΠΈΠΈ ΠΊΠΎΠΌΠΏΠ°Π½ΠΈΠΉ ΠΈ ΠΎΡΠ³Π°Π½ΠΎΠ² Π³ΠΎΡΡΠ΄Π°ΡΡΡΠ²Π΅Π½Π½ΠΎΠΉ Π²Π»Π°ΡΡΠΈ. Π Π΅Π·ΡΠ»ΡΡΠ°ΡΡ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ ΠΌΠΎΠ³ΡΡ Π±ΡΡΡ ΠΏΡΠΈΠΌΠ΅Π½Π΅Π½Ρ ΠΏΡΠΈ ΡΠ°Π·ΡΠ°Π±ΠΎΡΠΊΠ΅ ΠΌΠ΅Ρ Π³ΠΎΡΡΠ΄Π°ΡΡΡΠ²Π΅Π½Π½ΠΎΠΉ ΠΏΠΎΠ»ΠΈΡΠΈΠΊΠΈ Π² ΠΎΠ±Π»Π°ΡΡΠΈ ΡΠ°Π·Π²ΠΈΡΠΈΡ ΠΌΠ°Π»ΠΎΠ³ΠΎ ΠΈ ΡΡΠ΅Π΄Π½Π΅Π³ΠΎ ΠΏΡΠ΅Π΄ΠΏΡΠΈΠ½ΠΈΠΌΠ°ΡΠ΅Π»ΡΡΡΠ²Π° ΠΈ ΡΠ΅Π³ΠΈΠΎΠ½Π°Π»ΡΠ½ΠΎΠ³ΠΎ ΡΠ°Π·Π²ΠΈΡΠΈΡ
Quantum Hall Effect and Quantum Point Contact in Bilayer-Patched Epitaxial Graphene
We study an epitaxial graphene monolayer with bilayer inclusions via
magnetotransport measurements and scanning gate microscopy at low temperatures.
We find that bilayer inclusions can be metallic or insulating depending on the
initial and gated carrier density. The metallic bilayers act as equipotential
shorts for edge currents, while closely spaced insulating bilayers guide the
flow of electrons in the monolayer constriction, which was locally gated using
a scanning gate probe.Comment: 5 pages, 5 figure
The structure of mid- and high-latitude ionosphere during September 1999 storm event obtained from GPS observations
Recommended from our members
Resolving mobility anisotropy in quasi-free-standing epitaxial graphene by terahertz optical Hall effect
In this work, we demonstrate the application of terahertz-optical Hall effect (THz-OHE) to determine directionally dependent free charge carrier properties of ambient-doped monolayer and quasi-free-standing-bilayer epitaxial graphene on 4HβSiC(0001). Directionally independent free hole mobility parameters are found for the monolayer graphene. In contrast, anisotropic hole mobility parameters with a lower mobility in direction perpendicular to the SiC surface steps and higher along the steps in quasi-free-standing-bilayer graphene are determined for the first time. A combination of THz-OHE, nanoscale microscopy and optical spectroscopy techniques are used to investigate the origin of the anisotropy. Different defect densities and different number of graphene layers on the step edges and terraces are ruled out as possible causes. Scattering mechanisms related to doping variations at the step edges and terraces as a result of different interaction with the substrate and environment are discussed and also excluded. It is suggested that the step edges introduce intrinsic scattering in quasi-free-standing-bilayer graphene, that is manifested as a result of the higher ratio between mean free path and average terrace width parameters. The suggested scenario allows to reconcile existing differences in the literature regarding the anisotropic electrical transport in epitaxial graphene. Β© 2020 Elsevier Lt
Electrochemical behavior of pillar[5]arene on glassy carbon electrode and its interaction with Cu2+ and Ag+ ions
Β© 2014 Elsevier Ltd. All rights reserved. The electrochemical behavior of pillar[5]arene (P[5]A) and of its reaction products with Ag+ and Cu2+ ions has been investigated using cyclic voltammetry, optical methods and transmission electron microscopy (TEM). Stepwise oxidation of hydroquinone units of P[5]A molecule is guided by self-assembling and acid-base interactions. From one to three hydroquinone units per P[5]A molecule are oxidized depending on the measurement conditions. The deposition of P[5]A on glassy carbon electrode (GCE) partially blocks the electron transduction. Interfering influence of dissolved oxygen can be partially eliminated by the use of carbon black as immobilization matrix. The reaction of P[5]A with silver ions results in formation of most stable form with three benzoquinone and two hydroquinone units stabilized by quinhydrone-like structure. The Ag nanoparticles formed in the reaction retain electron transduction with the electrode due to involvement of shielding P[5]A molecules. Similar reaction with Cu2+ ions does not lead to stable products because of the formation of Cu2O particles detected by UV spectroscopy and TEM. Possible analytical applications of the materials obtained were proved by electrocatalytic reduction of hydrogen peroxide and mediated oxidation of thiocholine as model systems. In both cases, high sensitivity and wide range of the concentration determined were shown
- β¦