One step synthesis of pure cubic and monoclinic HfO2 nanoparticles: Correlating the structure to the electronic properties of the two polymorphs

2012 ◽  
Vol 112 (10) ◽  
pp. 104107 ◽  
Author(s):  
P. Rauwel ◽  
E. Rauwel ◽  
C. Persson ◽  
M. F. Sunding ◽  
A. Galeckas
Keyword(s):  
Electronic Properties ◽  
One Step

scholarly journals Synthesis, Properties, and Derivatization of Poly(dihydrogermane): A Germanium-based Polyethylene Analogue

2020 ◽  
Author(s):  
Haoyang Yu ◽  
Chuyi Ni ◽  
Alyxandra Thiessen ◽  
Ziqi Li ◽  
Jonathan G.C. Veinot
Keyword(s):  
Electronic Properties ◽  
Pendant Group ◽  
Zintl Phase ◽  
Present Contribution ◽  
Thermally Induced ◽  
Synthesis Properties ◽  
One Step ◽  
Derivatization Reaction

<div> <div> <div> <p>Polygermanes are germanium-based analogues of polyolefins and possess polymer backbones made up catenated Ge atoms. In the present contribution we report the preparation of a stable germanium polyethylene analogue – polydihydrogermane (i.e., (GeH2)n) – via two straightforward approaches that involve topotactic deintercalation of the CaGe Zintl phase. The resulting (GeH2)n possess morphologically dependent chemical and electronic properties and thermally decompose to yield amorphous hydrogenated Ge. We also show that the resulting (GeH2)n provide a platform from which functionalized polygermanes can be prepared via thermally-induced hydrogermylation-mediated pendant group substitution. This facile one-step derivatization reaction exploits Ge–H reactivity and opens the door to a wide array of tailored functional polygermanes. </p> </div> </div> </div>

Enhanced electronic properties in CH3NH3PbI3via LiCl mixing for hole-conductor-free printable perovskite solar cells

2016 ◽  
Vol 4 (42) ◽  
pp. 16731-16736 ◽  
Author(s):  
Yusong Sheng ◽  
Yue Hu ◽  
Anyi Mei ◽  
Pei Jiang ◽  
Xiaomeng Hou ◽  
...  
Keyword(s):  
Solar Cells ◽  
Electronic Properties ◽  
Perovskite Solar Cells ◽  
One Step

By mixing perovskite MAPbI3(MA = CH3NH3+) with LiCl, an effective one-step drop-coating approach was developed to improve the performance of hole-conductor-free printable perovskite solar cells.

scholarly journals Synthesis, Properties, and Derivatization of Poly(dihydrogermane): A Germanium-based Polyethylene Analogue

2020 ◽  
Author(s):  
Haoyang Yu ◽  
Chuyi Ni ◽  
Alyxandra Thiessen ◽  
Ziqi Li ◽  
Jonathan G.C. Veinot
Keyword(s):  
Electronic Properties ◽  
Pendant Group ◽  
Zintl Phase ◽  
Present Contribution ◽  
Thermally Induced ◽  
Synthesis Properties ◽  
One Step ◽  
Derivatization Reaction

<div> <div> <div> <p>Polygermanes are germanium-based analogues of polyolefins and possess polymer backbones made up catenated Ge atoms. In the present contribution we report the preparation of a stable germanium polyethylene analogue – polydihydrogermane (i.e., (GeH2)n) – via two straightforward approaches that involve topotactic deintercalation of the CaGe Zintl phase. The resulting (GeH2)n possess morphologically dependent chemical and electronic properties and thermally decompose to yield amorphous hydrogenated Ge. We also show that the resulting (GeH2)n provide a platform from which functionalized polygermanes can be prepared via thermally-induced hydrogermylation-mediated pendant group substitution. This facile one-step derivatization reaction exploits Ge–H reactivity and opens the door to a wide array of tailored functional polygermanes. </p> </div> </div> </div>

Comparison of processing windows and electronic properties between CH3NH3PbI3 perovskite fabricated by one-step and two-step solution processes

2018 ◽  
Vol 63 ◽  
pp. 159-165 ◽  
Author(s):  
Menglin Li ◽  
Yue-Min Xie ◽  
Xiuwen Xu ◽  
Yanping Huo ◽  
Sai-Wing Tsang ◽  
...  
Keyword(s):  
Electronic Properties ◽  
Solution Processes ◽  
One Step

scholarly journals Synthesis, Properties, and Derivatization of Poly(dihydrogermane): A Gemanium-based Polyethylene Analogue

2020 ◽  
Author(s):  
Haoyang Yu ◽  
Chuyi Ni ◽  
Alyxandra Thiessen ◽  
Ziqi Li ◽  
Jonathan G.C. Veinot
Keyword(s):  
Electronic Properties ◽  
Pendant Group ◽  
Zintl Phase ◽  
Present Contribution ◽  
Thermally Induced ◽  
Synthesis Properties ◽  
One Step ◽  
Derivatization Reaction

<div> <div> <div> <p>Polygermanes are germanium-based analogues of polyolefins and possess polymer backbones made up catenated Ge atoms. In the present contribution we report the preparation of a stable germanium polyethylene analogue – polydihydrogermane (i.e., (GeH2)n) – via two straightforward approaches that involve topotactic deintercalation of the CaGe Zintl phase. The resulting (GeH2)n possess morphologically dependent chemical and electronic properties and thermally decompose to yield amorphous hydrogenated Ge. We also show that the resulting (GeH2)n provide a platform from which functionalized polygermanes can be prepared via thermally-induced hydrogermylation-mediated pendant group substitution. This facile one-step derivatization reaction exploits Ge–H reactivity and opens the door to a wide array of tailored functional polygermanes. </p> </div> </div> </div>

An Interactive Minicomputer Program for the Indexing and Simulation of Electron Diffraction Patterns

1976 ◽  
Vol 34 ◽  
pp. 542-543
Author(s):  
R.P. Goehner ◽  
W.T. Hatfield ◽  
Prakash Rao
Keyword(s):  
Electron Diffraction ◽  
Real Time ◽  
Pattern Analysis ◽  
Flow Diagram ◽  
Hard Copy ◽  
Time Analysis ◽  
Real Time Analysis ◽  
Transmission Electron ◽  
One Step ◽  
Diffraction Patterns

Computer programs are now available in various laboratories for the indexing and simulation of transmission electron diffraction patterns. Although these programs address themselves to the solution of various aspects of the indexing and simulation process, the ultimate goal is to perform real time diffraction pattern analysis directly off of the imaging screen of the transmission electron microscope. The program to be described in this paper represents one step prior to real time analysis. It involves the combination of two programs, described in an earlier paper(l), into a single program for use on an interactive basis with a minicomputer. In our case, the minicomputer is an INTERDATA 70 equipped with a Tektronix 4010-1 graphical display terminal and hard copy unit.A simplified flow diagram of the combined program, written in Fortran IV, is shown in Figure 1. It consists of two programs INDEX and TEDP which index and simulate electron diffraction patterns respectively. The user has the option of choosing either the indexing or simulating aspects of the combined program.

Structural properties of GaAs/InGaAs/GaAs (001) and InGaAs/GaAs (001) heterostructures and correlation with electronic properties

1990 ◽  
Vol 48 (4) ◽  
pp. 602-603
Author(s):  
J.M. Bonar ◽  
R. Hull ◽  
R. Malik ◽  
R. Ryan ◽  
J.F. Walker
Keyword(s):  
Band Gap ◽  
Electronic Properties ◽  
Gaas Substrate ◽  
Critical Thickness ◽  
Lattice Mismatch ◽  
Band Offset ◽  
Misfit Dislocations ◽  
Gaas Substrates ◽  
Gaas Structure ◽  
Low X

In this study we have examined a series of strained heteropeitaxial GaAs/InGaAs/GaAs and InGaAs/GaAs structures, both on (001) GaAs substrates. These heterostructures are potentially very interesting from a device standpoint because of improved band gap properties (InAs has a much smaller band gap than GaAs so there is a large band offset at the InGaAs/GaAs interface), and because of the much higher mobility of InAs. However, there is a 7.2% lattice mismatch between InAs and GaAs, so an InxGa1-xAs layer in a GaAs structure with even relatively low x will have a large amount of strain, and misfit dislocations are expected to form above some critical thickness. We attempt here to correlate the effect of misfit dislocations on the electronic properties of this material.The samples we examined consisted of 200Å InxGa1-xAs layered in a hetero-junction bipolar transistor (HBT) structure (InxGa1-xAs on top of a (001) GaAs buffer, followed by more GaAs, then a layer of AlGaAs and a GaAs cap), and a series consisting of a 200Å layer of InxGa1-xAs on a (001) GaAs substrate.

Nutrient-regulated gene expression in eukaryotes

2006 ◽  
Vol 73 ◽  
pp. 85-96 ◽  
Author(s):  
Richard J. Reece ◽  
Laila Beynon ◽  
Stacey Holden ◽  
Amanda D. Hughes ◽  
Karine Rébora ◽  
...  
Keyword(s):  
Gene Expression ◽  
Rna Polymerase ◽  
Rna Polymerase Ii ◽  
Transcriptional Control ◽  
Direct Interaction ◽  
Signalling Pathways ◽  
A Cell ◽  
One Step ◽  
Higher Eukaryotes ◽  
Regulated Gene Expression

The recognition of changes in environmental conditions, and the ability to adapt to these changes, is essential for the viability of cells. There are numerous well characterized systems by which the presence or absence of an individual metabolite may be recognized by a cell. However, the recognition of a metabolite is just one step in a process that often results in changes in the expression of whole sets of genes required to respond to that metabolite. In higher eukaryotes, the signalling pathway between metabolite recognition and transcriptional control can be complex. Recent evidence from the relatively simple eukaryote yeast suggests that complex signalling pathways may be circumvented through the direct interaction between individual metabolites and regulators of RNA polymerase II-mediated transcription. Biochemical and structural analyses are beginning to unravel these elegant genetic control elements.

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