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61.
K. N. Otkidach N. V. Shvedene P. A. Tarakanov L. G. Tomilova I. V. Pletnev 《Moscow University Chemistry Bulletin》2016,71(4):270-276
Cobalt(II) porphyrazine is synthesized and studied as an active component of a polyvinyl chloride plasticized membrane ion-selective electrodes (ISEs). It is established that regardless of their structure, ISEs are sensitive to iodide. The introduction to the ISE of an ionic additive, ionic liquid 1,3-dihexadecylimidazolium chloride, significantly improves the electrochemical characteristics: the slope of the electrode function reaches ?(57 ± 1) mV/dec, cmin = 8.3 × 10–6 M. Solid-state screen-printed electrodes the surfaces of which are modified by a 1: 4 mixture of cobalt(II) porphyrazine and ionic liquid 1,3-dihexadecylimidazolium chloride demonstrate satisfactory electrochemical characteristics: the slope of the electrode function is ?(56 ± 4) mV/dec and cmin = 2.5 × 10–5 M. The potentiometric selectivity of the ISEs for iodide is studied. It is found that the effect of lipophilic interfering ions is significantly lower for solid state ISEs than for plasticized membrane electrodes. 相似文献
62.
We present a rare example of a decay mechanism playing a constructive role in quantum information processing. We show how
the state of an atom trapped in a cavity can be teleported to a second atom trapped in a distant cavity by the joint detection
of photon leakage from the cavities. The scheme, which is probabilistic, requires only a single three level atom in a cavity.
We also show how this scheme can be modified to a teleportation with insurance. 相似文献
63.
O.?G.?TsarkovaEmail author A.?A.?Rukhadze V.?P.?Tarakanov V.?B.?Tsvetkov S.?V.?Garnov V.?V.?Nazarenko P.?Ya.?Nosatenko B.?A.?Vyskubenko 《Physics of Wave Phenomena》2012,20(1):18-23
Computation of the processes of laser heating of carbon silicon carbide composite material (CSCCM) samples in air (to temperatures
above 2000°C for 1 s) by IR laser radiation with a wavelength of 1.3 μm and intensity of 3 kWcm−2 in the presence of screening ablation plume have been carried out using the KARAT code. A comparison of the simulation results
with the experimental dependences of spatial and temporal fields of sample temperatures made it possible to determine the
absorptivity of thematerial, energy loss in the ablation plume, and, correspondingly, its influence on the heating and ablation
of the material under study. 相似文献
64.
We obtain superstability conditions for a class of three-dimensional autonomous chaotic systems with quadratic nonlinearities
and with singular points. On the basis of correction of the entries of the Jacobian matrix of the system, we develop a technique
of optimal multiparameter correction, which permits one to study the problem of optimally reaching the superstable type of
behavior. 相似文献
65.
The dynamics of back cathode bombardment (BCB) instability in a magnetron diode (a coaxial diode in a magnetic field, B ≡ B
0z ≡ B
0) is numerically simulated. The quasi-stationary regime of electron leakage across the high magnetic field (B
0/B
cr > 1.1, where B
cr is the insulation critical field) is realized. An electron beam in the electrode gap is split into a series of bunches in
the azimuthal direction and generates the electric field component E
θ(r, θ, t), which accelerates some of the electrons. Having gained an extra energy, these electrons bombard the cathode, causing secondary
electron emission. The rest of the electrons lose kinetic energy and move toward the anode. Instability is sustained if the
primary emission from the cathode is low and the secondary emission coefficient k
se=I
se/I
e, BCB is greater than unity. The results of numerical simulation are shown to agree well with experimental data. A physical model
of back-bombardment instability is suggested. Collective oscillations of charged flows take place in the gap with crossed
electric and magnetic fields (E × B field) when the electrons and E × B field exchange momentum and energy. The self-generation and self-organization of flows are due to secondary electron emission
from the cathode. 相似文献
66.
采用密度泛函理论计算研究了在铈表面掺杂的过渡金属(TM)离子对表面晶格氧原子活化的影响.为此,测定了经TM离子修饰的CeO2最稳定(111)表面终端的结构和稳定性.除了保持八面体氧配位的锆和铂掺杂剂外, TM掺杂剂在取代表面Ce离子时更倾向于正方形平面配位.除了Pt(1.14 eV)和Zr(正方形平面配位不稳定)外,所有TM掺杂剂的表面结构从八面体到正方形平面都很容易.通常,四价TM阳离子的离子半径比Ce^4+的小得多,从而导致了显著的拉伸应变晶格,并解释了氧空位形成能量的降低.除Zr外,当产生一个氧空位时,优先形成正方形平面结构.热力学分析表明, TM掺杂CeO2表面在典型环境催化条件下存在氧缺陷.一个具有实际意义的例子是锆掺杂CeO2(111)中的晶格氧容易活化,从而有利于CO氧化.研究结果强调了晶格氧活化的本质和TM掺杂剂在TM-铈固溶催化剂中的优选位置. 相似文献
67.
Dielectric properties of ceramic samples of Sr1−x
PbxTiO3 solid solutions for x varying from 0 to 0.3 have been studied. The ferroelectric phase transition in this system has been established to persist
down to x=0.005. Within the x values of 0.002 to 0.05, the ferroelectric transition temperature is shown to follow the relation T
c=A(x−x
c)1/2, with A=440 K and x
c=0.002.
Fiz. Tverd. Tela (St. Petersburg) 39, 714–717 (April 1997) 相似文献
68.
Belyaev V. S. Matafonov A. P. Andreev S. N. Tarakanov V. P. Krainov V. P. Lisitsa V. S. Kedrov A. Yu. Zagreev B. V. Rusetskii A. S. Borisenko N. G. Gromov A. I. Lobanov A. V. 《Physics of Atomic Nuclei》2022,85(1):31-41
Physics of Atomic Nuclei - The results obtained by experimentally and theoretically studying the yield of the promising nuclear-fusion reaction $${}^{11}$$ B( $$p,3\alpha$$ ) initiated by powerful... 相似文献
69.
70.
Technical Physics - The dynamics of formation of a virtual cathode and the squeezed beam state (SBS) in a setup with a sublimiting relativistic electron beam under repeated input of the electron... 相似文献