Modulating the electron transport energy levels of protein by doping with foreign molecule

2019 ◽  
Vol 851 ◽  
pp. 113472
Author(s):  
Wenhui Liang ◽  
Chuanli Wu ◽  
Yongkang Xu ◽  
Ping Wu ◽  
Chenxin Cai
Keyword(s):  
Electron Transport ◽  
Energy Levels ◽  
Foreign Molecule

Utilization of double-sensitized structure toward achieving high performance green and red phosphorescent organic light-emitting diodes

2021 ◽  
Author(s):  
Shuaibing Li ◽  
Ruixia Wu ◽  
Kai Chen ◽  
Weidong Sun ◽  
Zhenzhen Li ◽  
...  
Keyword(s):  
Electron Transport ◽  
High Performance ◽  
Light Emitting Diodes ◽  
Energy Levels ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Tert Butyl ◽  
Organic Light

In this work, iridium(III)bis(4-(tert-butyl)-2,6-diuoro-2,3-bipyridinne)acetylacetonate (FK306) was utilized as sensitizer and incorporated into both light-emitting and electron transport layers to compose double-sensitized system because of its low-lying energy levels and well...

First-Principles Study of the Electron Transport Behavior of Short Graphene Nanoribbon

2011 ◽  
Vol 287-290 ◽  
pp. 313-316
Author(s):  
Yan Wei Li ◽  
Jin Huan Yao ◽  
Sheng Kui Zhong ◽  
Ji Qiong Jiang ◽  
Xiao Xi Huang
Keyword(s):  
Spatial Distribution ◽  
Electron Transport ◽  
Density Functional ◽  
Energy Levels ◽  
Density Functional Theory Calculations ◽  
Differential Resistance ◽  
Graphene Nanoribbon ◽  
Molecular Orbitals ◽  
Function Technique ◽  
Transport Behavior

The electron transport behavior of a short graphene nanoribbon sandwiched between two gold(111) electrodes is investigated using density functional theory calculations and nonequilibrium Green’s function technique. The calculated current-voltage characteristic of the graphene nanoribbon junction shows an obvious negative differential resistance (NDR) phenomenon. The mechanism of this NDR behavior of graphene nanoribbon is discussed in terms of the evolution of the molecular energy levels, the spatial distribution of frontier molecular orbitals, and the electron transmission spectra under various applied biases. It is found that the changes of the spatial distribution of molecular orbitals near Fermi level with the applied bias lead to such NDR behavior.

Hidden energy levels? Carrier transport ability of CdS/CdS1−xSex quantum dot solar cells impacted by Cd–Cd level formation

Nanoscale ◽  
2019 ◽  
Vol 11 (2) ◽  
pp. 762-774 ◽  
Author(s):  
Andrés. F. Gualdrón-Reyes ◽  
Angel M. Meléndez ◽  
Juan Tirado ◽  
Mario Alejandro Mejia-Escobar ◽  
Franklin Jaramillo ◽  
...  
Keyword(s):  
Solar Cells ◽  
Electron Transport ◽  
Quantum Dot ◽  
Carrier Transport ◽  
Light Harvesting ◽  
Energy Levels ◽  
Quantum Dot Solar Cells ◽  
Sensitized Solar Cells ◽  
Cd Chalcogenides

Hidden Cd–Cd energy levels formed in Cd–chalcogenides impact both light harvesting and electron transport in quantum dot-sensitized solar cells.

Tuning Energy Levels of Electron-Transport Materials by Nitrogen Orientation for Electrophosphorescent Devices with an ‘Ideal’ Operating Voltage

2010 ◽  
Vol 22 (30) ◽  
pp. 3311-3316 ◽  
Author(s):  
Shi-Jian Su ◽  
Hisahiro Sasabe ◽  
Yong-Jin Pu ◽  
Ken-ichi Nakayama ◽  
Junji Kido
Keyword(s):  
Electron Transport ◽  
Energy Levels ◽  
Operating Voltage

Halogenation of a Nonplanar Molecular Semiconductor to Tune Energy Levels and Bandgaps for Electron Transport

2015 ◽  
Vol 27 (5) ◽  
pp. 1892-1900 ◽  
Author(s):  
Anna M. Hiszpanski ◽  
Jonathan D. Saathoff ◽  
Leo Shaw ◽  
He Wang ◽  
Laura Kraya ◽  
...  
Keyword(s):  
Electron Transport ◽  
Energy Levels ◽  
Molecular Semiconductor

scholarly journals QUANTUM TRANSPORT THROUGH HETEROCYCLIC MOLECULES

2009 ◽  
Vol 23 (02) ◽  
pp. 177-187
Author(s):  
SANTANU K. MAITI ◽  
S. N. KARMAKAR
Keyword(s):  
Electron Transport ◽  
Transport Properties ◽  
Energy Levels ◽  
Tight Binding ◽  
Molecular Transport ◽  
Molecular Wires ◽  
Function Technique ◽  
Binding Model ◽  
Heterocyclic Molecules ◽  
Electron Transport Properties

We explore electron transport properties in molecular wires made of heterocyclic molecules (pyrrole, furan and thiophene) by using the Green's function technique. Parametric calculations are given based on the tight-binding model to describe the electron transport in these wires. It is observed that the transport properties are significantly influenced by (a) the heteroatoms in the heterocyclic molecules and (b) the molecule-to-electrodes coupling strength. Conductance (g) shows sharp resonance peaks associated with the molecular energy levels in the limit of weak molecular coupling, while they get broadened in the strong molecular coupling limit. These resonances get shifted with the change of the heteroatoms in these heterocyclic molecules. All the essential features of the electron transfer through these molecular wires become much more clearly visible from the study of our current-voltage (I-V) characteristics, and they provide several key information in the study of molecular transport.

Universalities of anomalous properties in electron transport through different Z-shaped phosphorene nanoribbon devices

2021 ◽  
Author(s):  
M. R. Song ◽  
H. L. Shi ◽  
Z. T. Jiang ◽  
Y. H. Ren ◽  
J. Yang ◽  
...  
Keyword(s):  
Electron Transport ◽  
Bias Voltage ◽  
Central Region ◽  
Transport Mechanism ◽  
Energy Levels ◽  
Electronic Devices ◽  
Differential Conductance ◽  
Complete Suppression ◽  
Negative Differential Conductance ◽  
Transmission Coefficients

Aiming at improving the flexibility of designing the phosphorene-based nanodevices, we propose three kinds of Z-shaped phosphorene nanoribbons (ZPNRs), which are composed of two metallic nanoribbon electrodes and one semiconducting/metallic nanoribbon central region (CR). Many anomalous properties including the unexpected current increasing under the low bias voltage, the negative differential conductance, and the transition of the transport mechanism are found to be universal in different ZPNRs. Also, we find the current can be significantly suppressed by increasing the CR length, while no complete suppression can be induced by the increase of the CR width, indicating that the CR length and width will make different influences on the ZPNR transport. Moreover, the energy spectrums of two electrodes, the molecular energy levels of the CR, the transmission coefficients, and the transmission eigenstates are further calculated so as to clearly expound the anomalous properties and their universalities. We believe this research can provide a meaningful guidance for developing the phosphorene-based electronic devices.

scholarly journals Functional Characterization and Mutagenesis of the Proposed Behavioral Sensor TlpD of Helicobacter pylori

2008 ◽  
Vol 190 (9) ◽  
pp. 3244-3255 ◽  
Author(s):  
Tobias Schweinitzer ◽  
Tomoko Mizote ◽  
Naohiro Ishikawa ◽  
Alexey Dudnik ◽  
Sakiko Inatsu ◽  
...  
Keyword(s):  
Helicobacter Pylori ◽  
Electron Transport ◽  
Energy Levels ◽  
Functional Characterization ◽  
Behavioral Responses ◽  
Flagellar Motility ◽  
Wild Type ◽  
In The Wild ◽  
Energy Sensing ◽  
H Pylori

ABSTRACT Helicobacter pylori requires flagellar motility and chemotaxis to establish and maintain chronic infection of the human stomach. The pH gradient in the stomach mucus is essential for bacterial orientation and guides the bacterium toward a narrow layer of the mucus, suggesting that H. pylori is capable of energy sensing or taxis. In the present study, H. pylori wild-type behavior in a temporal swimming assay could be altered by electron transport inhibitors, indicating that a connection between metabolism and behavior exists. In order to elucidate mechanisms of behavioral responses of H. pylori related to energy sensing, we investigated the phenotypes of single and multiple mutants of the four proposed chemotaxis sensor proteins. All sensor mutants were motile, but they diverged in their behavior in media supporting different energy yields. One proposed intracellular sensor, TlpD, was crucial for behavioral responses of H. pylori in defined media which did not permit growth and led to reduced bacterial energy levels. Suboptimal energetic conditions and inhibition of electron transport induced an increased frequency of stops and direction changes in the wild type but not in tlpD mutants. Loss of metabolism-dependent behavior in tlpD mutants could be reversed by complementation but not by electron donors bypassing the activity of the electron transport chain, in contrast to the case for the wild type. TlpD, which apparently lacks transmembrane domains, was detected both in the bacterial cytoplasm and at the bacterial periphery. The proposed energy sensor TlpD was found to mediate a repellent tactic response away from conditions of reduced electron transport.

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