Results 1 to 10 of about 4,433 (90)

The charge percolation mechanism and simulation of Ziegler-Natta polymerizations, part VI: Mechanism of ethylene polymerization by supported chromium oxide [PDF]

Journal of the Serbian Chemical Society, 2007
Despite intensive research over the last 50 years, many questions concerning ethylene polymerization by supported chromium oxide are still unanswered. Hence, the very fundamental issues of this polymerization are discussed in this paper. It is shown that
Stoiljković Dragoslav, Pilić Branka, Bulajić Miša, Đurasović Nebojša, Ostrovski Nikolaj   +4 more
doaj   +6 more sources

The charge percolation mechanism and simulation of Ziegler-Natta polymerizations. Part III. Oxidation states of transition metals [PDF]

Journal of the Serbian Chemical Society, 2006
The oxidation state of the transition metal (Mt) active centre is the most disputable question in the polymerization of olefins by Ziegler-Natta (ZN) and metallocene complexes.
Pilić Branka, Stoiljković Dragoslav, Bakočević Ivana, Jovanović Slobodan, Panić Davor, Korugić-Karasz Ljiljana   +5 more
doaj   +4 more sources

The charge percolation mechanism and simulation of Ziegler–Natta polymerizations. Part VII. Effects of the distribution of chromium active centers on silica on the polymerization of ethylene [PDF]

Journal of the Serbian Chemical Society, 2008
The charge percolation mechanism (CPM) of olefin polymerization in the presence of transition metal compounds has been applied to explain the polymerization of ethylene by silica supported chromium oxide.
DRAGOSLAV STOILJKOVIC, BRANKA PILIC, MISA BULAJIC, NEBOJSA DJURASOVIC, NIKOLAJ OSTROVSKII   +4 more
doaj   +4 more sources

Percolation-Driven NO₂ Sensing in Structurally Tuned Sn/SnO Nanoparticles at Room Temperature with Parts-per-Billion Sensitivity [PDF]

Sensors
Monitoring air quality is crucial for understanding and improving public health. There is interest in developing ultra-sensitive, low-power, cost-effective sensors.
Wilfredo Otaño, Adrian Camacho, Wilanyi Alvarez, Wanda Rivera, Francisco Bezares, Danilo Barrionuevo, Victor M. Pantojas   +6 more
doaj   +2 more sources

Nanocluster intermediates orchestrate the phase transition of ATP condensates [PDF]

Communications Chemistry
Phase separation is fundamental to cellular organization, yet early events driving this process remain poorly characterized. ATP is highly concentrated in platelet dense granules, where it coexists with divalent cations.
Zihan Li, Tairan Yuwen, Chun Tang
doaj   +2 more sources

Impact of Fluoroalkylation on the n-Type Charge Transport of Two Naphthodithiophene Diimide Derivatives

Molecules, 2021
In this work, we investigate two recently synthesized naphthodithiophene diimide (NDTI) derivatives featuring promising n-type charge transport properties.
Gaetano Ricci, Sofia Canola, Yasi Dai, Daniele Fazzi, Fabrizia Negri   +4 more
doaj   +1 more source

Charge transport variation from Bloch–Grüneisen to Mott variable range hopping and transport change due to hydrogenation in Palladium thin films

Scientific Reports, 2021
We report a systematic investigation of the differences in charge transport mechanism in ultra-thin nano-island like films of palladium with thickness varying between 5 nm and 3 nm. The thicker films were found to be metallic in a large temperature range
Adithya Jayakumar, Viney Dixit, Sarath Jose, Vinayak B. Kamble, D. Jaiswal-Nagar   +4 more
doaj   +1 more source

Structural-disorder-driven critical quantum fluctuation and localization in two-dimensional semiconductors

Nature Communications, 2023
Quantum fluctuations of wavefunctions in disorder-driven quantum phase transitions (QPT) exhibit criticality, as evidenced by their multifractality and power law behavior. However, understanding the metal-insulator transition (MIT) as a continuous QPT in
Bong Gyu Shin, Ji-Hoon Park, Jz-Yuan Juo, Jing Kong, Soon Jung Jung   +4 more
doaj   +1 more source

Dielectric properties, polarization process, and charge transport in granular (FeCoZr)x(Pb(ZrTi)O3)(100−x) nanocomposites near the percolation threshold

AIP Advances, 2022
This paper presents the research of dielectric properties of (FeCoZr)x(Pb(ZrTi)O3)(100−x) granular metal–dielectric nanocomposites below the percolation threshold.
Oleksandr Boiko, Daria Drozdenko, Peter Minárik   +2 more
doaj   +1 more source

Anomalous Charge Transport in Conjugated Polymers Reveals Underlying Mechanisms of Trapping and Percolation

ACS Central Science, 2016
While transport in conjugated polymers has many similarities to that in crystalline inorganic materials, several key differences reveal the unique relationship between the morphology of polymer films and the charge mobility. We develop a model that directly incorporates the molecular properties of the polymer film and correctly predicts these unique ...
Sonya A. Mollinger, Alberto Salleo, Andrew J. Spakowitz   +2 more
openaire   +3 more sources