Multinuclear Phthalocyanine-Fused Molecular Nanoarrays: Synthesis, Spectroscopy, and Semiconducting Property

2017 ◽  
Vol 23 (36) ◽  
pp. 8644-8651 ◽  
Author(s):  
Hong Shang ◽  
Zheng Xue ◽  
Kang Wang ◽  
Huibiao Liu ◽  
Jianzhuang Jiang
Keyword(s):  
Semiconducting Property

Graphene-based Nano-Devices: Perfect Spin Seebeck and Pure Spin Photogalvanic Effects

2021 ◽  
Author(s):  
Yaojun Dong ◽  
Xixi Tao ◽  
Lihua Wang ◽  
Yinzhong Wu ◽  
Ning Yu ◽  
...  
Keyword(s):  
Graphene Nanoribbons ◽  
Pure Spin ◽  
Photogalvanic Effect ◽  
Thermoelectric Transport ◽  
Semiconducting Property

We investigate the magnetic, thermoelectric transport, and photogalvanic effect (PGE) properties of two nano-devices based on sawtooth edged graphene nanoribbons (SGNRs). It is found that a robust spin-semiconducting property exists...

Density functional theory study of acrolein adsorption on graphyne

2015 ◽  
Vol 93 (11) ◽  
pp. 1261-1265
Author(s):  
A.R. Karami
Keyword(s):  
Density Functional Theory ◽  
Electronic Properties ◽  
Adsorption Energy ◽  
Density Functional ◽  
Mulliken Charge ◽  
Density Functional Theory Study ◽  
Donor Molecule ◽  
Functional Theory ◽  
Charge Analysis ◽  
Semiconducting Property

We have used density functional theory to study the effect of acrolein adsorption on the electronic properties of graphyne. It is found that the acrolein molecule is physisorbed on graphyne sheets with small adsorption energy and large adsorption distance. Mulliken charge analysis indicates that charge is transferred from the acrolein molecule to the graphyne sheets. In the presence of this charge donor molecule, α- and β-graphyne with semimetallic properties and γ-graphyne with semiconducting property become n-type semiconductors. The sensitivity of the electronic properties of graphyne to the presence of acrolein indicates that graphyne sheets are appropriate materials to use as a sensor for acrolein detection.

Infrared Spectra of Electronically Doped Polythiophene

2016 ◽  
Vol 1141 ◽  
pp. 222-231
Author(s):  
Hitesh Parmar ◽  
R.K. Shah ◽  
A.T. Oza
Keyword(s):  
Optical Properties ◽  
Band Gap ◽  
Infrared Spectra ◽  
Small Polaron ◽  
Ftir Spectra ◽  
Polaron Model ◽  
Chemical Company ◽  
Electronic Doping ◽  
Semiconducting Property

Polythiophene was prepared by oxidation of thiophene. It was electronically doped with organic acceptors such as TCNE, TCNQ, DDQ, Chloranil and kI-I2. The FTIR spectra revealed only little change of intermolecular band gap of about 0.21ev of polythiophene .However, polythiophene (pure) obtained from chemical company revealed degenerate semiconducting property. The electronic doping with the organic acceptors and kI-I2 revealed optical properties in small polaron model in the FTIR range. Thus both non-degenerate and degenerate polythiophenes were studied with 60% doping of organic acceptors.

Fabrication of Lead-Free Semiconducting Ceramics Using BaTiO3-(Bi1/2Na1/2)TiO3 System by Sintering in Air Atmosphere

2011 ◽  
Vol 485 ◽  
pp. 245-248 ◽  
Author(s):  
Takashi Tateishi ◽  
Han Joong Sang ◽  
Hiroaki Takeda ◽  
Takuya Hoshina ◽  
Spela Kunej ◽  
...  
Keyword(s):  
Sintering Temperature ◽  
Positive Temperature Coefficient ◽  
Lead Free ◽  
Positive Temperature ◽  
Resistivity Change ◽  
Air Atmosphere ◽  
Semiconducting Ceramics ◽  
Temperature Coefficient Of Resistivity ◽  
Semiconducting Property ◽  
Thermistor Material

BaTiO3–(Bi1/2Na1/2)TiO3(abbreviated as BT-BNT) solid solution ceramics, as a lead-free PTC (Positive Temperature Coefficient of resistivity) thermistor material usable over 130°C, were synthesized in air atmosphere. By conventional processes, La-doping was not effective in giving semiconducting property to the BT-BNT ceramics because of volatilization of sodium and bismuth during sintering. By preventing the volatilization by lowering the sintering temperature using very fine TiO2powder and by adding calcium oxide to calcined BT-BNT powders, we obtained BT-BNT semiconducting ceramics which shows a resistivity change near Curie temperature.

Atom-selective loss structures: evidence for semiconducting property of Na/Si() surfaces

2001 ◽  
Vol 495 (1-2) ◽  
pp. 51-54 ◽  
Author(s):  
C.C Hwang ◽  
K.-J Kim ◽  
T.-H Kang ◽  
B Kim
Keyword(s):  
Selective Loss ◽  
Semiconducting Property

A Facile Method to Preparation of Amphiphilic Perylene Tetracarboxylic Diimide/ZnS Hybrid Nanocomposites and Improved Semiconducting Property

2014 ◽  
Vol 936 ◽  
pp. 295-299 ◽  
Author(s):  
Jin Gang Song ◽  
Hong Yan Wang ◽  
Nian Shuai An ◽  
Yan Li Chen
Keyword(s):  
Organic Semiconductors ◽  
Hybrid Nanocomposites ◽  
Organic Template ◽  
X Ray Diffraction ◽  
X Ray ◽  
Current Voltage ◽  
Order Of Magnitude ◽  
Zns Nanocrystals ◽  
Semiconducting Property ◽  
Scanning Electron

A self-assembled film of an amphiphilic perylene tetracarboxylic diimide derivative (N-hexane-N'-(1-phenyl-4-aminoethanol)-1,7-di (4-tert-butylphenoxy) perylene-3,4;9,10-tetracarboxylate diimide, HH-PDI) has been used as the organic template to produce the first example of monodispersed nanoparticles of HH-PDI/ZnS composites. The HH-PDI pure film and HH-PDI/ZnS nanocomposites were characterized by UV-vis absorption, X-ray diffraction (XRD), scanning electron microscopy (SEM) and current-voltage (I-V) measurements. Experimental results revealed the film crystallinity and general molecular order for HH-PDI molecules in the nanocomposites are improved effectively in comparison with those in the pure film due to the introduction of ZnS nanocrystals. The electrical conductivity of the HH-PDI/ZnS nanocomposites (6.6×10-5 S cm-1) is more than ca. 2 order of magnitude higher than that of (3.6×10-7 S cm-1). The present result provides an efficient way to improve the performance of organic semiconductors through introducing inorganic semiconducting nanocrystals.

A Comparative Study of Semiconducting Behavior of Passive Film of High Nitrogen and Ni and Mn Free Stainless Steels in 3.5 wt. % NaCl

2013 ◽  
Vol 794 ◽  
pp. 626-631 ◽  
Author(s):  
S.B. Arya ◽  
V.S. Raja ◽  
A.N. Tiwari
Keyword(s):  
Passive Film ◽  
Stainless Steels ◽  
Potential Range ◽  
High Nitrogen ◽  
Pitting Potential ◽  
Donor Density ◽  
Passive Current ◽  
P Type ◽  
Stable Passive ◽  
Semiconducting Property

The semiconducting property of passive films formed on Alloy 1 (18Cr-2Mo-1N)], Alloy 2 (17.5Cr-3Mo-0.5N)] and Alloy 3 (Type 316 SS) were studied by using the Mott-Schottky (M-S) approach in 3.5 wt. % NaCl solution of pH 2, 7 and 12. The M-S analysis shows that the film acts as n - type and p - type semiconductors across the potential range. The donor density of Alloy 1 has been found to be lower by about 31 %, 11 % and 6 % as compared to that of Alloy 2 at pH 2, 7 and 12 respectively. However; Alloy 3 has higher donor density 44 %, 27 % and 30 % in comparison with Alloy 1. The donor density of Alloy 3 found to be greater about 21 %, 18 % and 25 % to the Alloy 2 at pH 2, 7 and 12 respectively. These results indicate that the sensitivity of electrolyte composition and the presence of alloying elements like nitrogen and nickel on the donor density of passive film. High nitrogen stainless steels exhibited a lower donor density that corresponds to good protectiveness, more stable passive film which is in agreement with a low passive current density (ipass), higher pitting potential (Epit) and polarization resistance (Rp).

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