Topology dependent electronic and dielectric properties of free standing alloyed ultrathin nanowires of noble metals

2014 ◽  
Vol 62 ◽  
pp. 136-146 ◽  
Author(s):  
Arun Kumar ◽  
Ashok Kumar ◽  
P.K. Ahluwalia
Keyword(s):  
Dielectric Properties ◽  
Noble Metals ◽  
Free Standing

Interface Structure and Dielectric Properties of SrTiO3 Thin Film Sputter-Deposited onto Si Substrates

1990 ◽  
Vol 200 ◽  
Author(s):  
S. Matsubara ◽  
T. Sakuma ◽  
S. Yamamichi ◽  
H. Yamaguchi ◽  
Y. Miyasaka
Keyword(s):  
Thin Film ◽  
Dielectric Constant ◽  
Dielectric Properties ◽  
Film Thickness ◽  
Noble Metals ◽  
Film Surface ◽  
Cross Sectional ◽  
Capacitance Density ◽  
Barrier Layers ◽  
Si Substrates

ABSTRACTSrTiO3 thin film preparation onto Si substrates using RF magnetron sputtering has been studied for a high capacitance density required for the next generation of LSI's. Structural and chemical analysis on the interface between SrTiO3 film and Si was carried out with cross-sectional TEM, EDX, and AES. Dielectric properties were measured on AuTi/SrTiO3/Si/Ti/Au capacitors. The as-grown dielectric films on Si were analyzed and found to consist of three layers; SiO2, amorphous SrTiO3 and crystalline SrTiO3, from interface toward film surface. By annealing at 600 °C, the amorphous SrTiO3 layer was recrystallized, and consequently the capacitance value increased. A typical specific capacitance was 4.7 fF/μm2 and the leakage current was in the order of 10−8 A/cm2, for 180 nm thick SrTiO3 film. The dielectric constant decreased from 147 to 56 with decreasing SrTiO3 film thickness from 480 nm to 80 nm. This is due to the low dielectric constant SiO2 layer (ε=3.9) at the interface. From the film thickness dependence of the ε value, the SiO2 layer thickness was calculated to be 3.9 nm, which agreed well with the value directly observed in the TEM.To avoid SiO2 layer formation, barrier layers between SrTiO3 and Si have been studied. Among various refractory and noble metals, RuSi and a multi-layer of Pt/Ti have been found to be promising candidates for the barrier material. When RuSi film or Pt/Ti film was formed between SrTiO3 film and Si substrate, dielectric constant of about 190 was obtained in dependent of the SrTiO3 film thickness in the range of 80–250 nm. Analysis on the barrier layers was performed by means of RBS, XPS and XRD.

Investigation of dielectric properties of free standing electrospun nonwoven mat

2017 ◽  
Vol 135 (16) ◽  
pp. 46121 ◽  
Author(s):  
Jitendra Tahalyani ◽  
Suwarna Datar ◽  
Kandasubramanian Balasubramanian
Keyword(s):  
Dielectric Properties ◽  
Free Standing

Solution-Processed Free-Standing Ultrathin Two-Dimensional PbS Nanocrystals with Efficient and Highly Stable Dielectric Properties

2017 ◽  
Vol 29 (3) ◽  
pp. 1175-1182 ◽  
Author(s):  
Ali Hossain Khan ◽  
Somnath Pal ◽  
Amit Dalui ◽  
Jayita Pradhan ◽  
D. D. Sarma ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
Two Dimensional ◽  
Free Standing ◽  
Solution Processed ◽  
Pbs Nanocrystals

scholarly journals Dark-Field Scattering and Local SERS Mapping from Plasmonic Aluminum Bowtie Antenna Array

Micromachines ◽  
2019 ◽  
Vol 10 (7) ◽  
pp. 468 ◽  
Author(s):  
Thang Duy Dao ◽  
Chung Vu Hoang ◽  
Natsuki Nishio ◽  
Naoki Yamamoto ◽  
Akihiko Ohi ◽  
...  
Keyword(s):  
Antenna Arrays ◽  
Noble Metals ◽  
Ultra Violet ◽  
Surface Enhanced Raman Spectroscopy ◽  
Dark Field ◽  
Infrared Range ◽  
Plasmonic Resonance ◽  
Free Standing ◽  
Bowtie Antenna ◽  
Surface Enhanced Raman

On the search for the practical plasmonic materials beyond noble metals, aluminum has been emerging as a favorable candidate as it is abundant and offers the possibility of tailoring the plasmonic resonance spanning from ultra-violet to the infrared range. In this letter, in combination with the numerical electromagnetic simulations, we experimentally study the dark-field scattering spectral mapping of plasmonic resonance from the free-standing Al bowtie antenna arrays and correlate their strong nearfield enhancement with the sensing capability by means of surface-enhanced Raman spectroscopy. The spatial matching of plasmonic and Raman mapping puts another step to realize a very promising application of free-standing Al bowtie antennas for plasmonic sensing.

scholarly journals Influence of coupling agent on the microstructure and dielectric properties of free-standing ceramic-polymer composites

2019 ◽  
Vol 6 (9) ◽  
pp. 095322 ◽  
Author(s):  
Yang Tong ◽  
Leyi Li ◽  
Jiachen Liu ◽  
Kewei Zhang ◽  
Yong Jiang
Keyword(s):  
Dielectric Properties ◽  
Polymer Composites ◽  
Coupling Agent ◽  
Free Standing

Flexible thiophene polymers: a concerted macromolecular architecture for dielectrics

2016 ◽  
Vol 7 (17) ◽  
pp. 2929-2933 ◽  
Author(s):  
Xiaodong Yin ◽  
Yali Qiao ◽  
Matthew R. Gadinski ◽  
Qing Wang ◽  
Chuanbing Tang
Keyword(s):  
Dielectric Properties ◽  
Side Chains ◽  
Free Standing ◽  
Polymer Backbone ◽  
Macromolecular Architecture

Highly flexible and transparent free-standing films can be readily obtained from oligothiophene-containing norbornene polymers and their hydrogenated derivatives prepared by ROMP. The rigidness/softness of the polymer backbone and polar side chains dictate dielectric properties.

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