Alternating current response studies on nickel ferrite-niobium composite at room temperature

2018 ◽  
Author(s):  
L. P. Babu Reddy ◽  
H. G. Rajprakash ◽  
B. Chethan ◽  
S. C. Vijayakumari ◽  
Y. T. Ravikiran
Keyword(s):  
Nickel Ferrite ◽  
Room Temperature ◽  
Alternating Current ◽  
Current Response

Room temperature alternating current response of polypyrrole/magnesium oxide composite

2020 ◽  
Author(s):  
Thalari Chandrashekar ◽  
Ramachandrappa Megha ◽  
Basavalingappa Chethan ◽  
Yaled Thippswamy Ravikiran ◽  
Nagappa Sasidhar ◽  
...  
Keyword(s):  
Magnesium Oxide ◽  
Room Temperature ◽  
Alternating Current ◽  
Current Response ◽  
Oxide Composite

Graphene Modified Molecular Imprinting Electrochemical Sensor for Determining the Content of Dopamine

2019 ◽  
Vol 15 (6) ◽  
pp. 628-634
Author(s):  
Rong Liu ◽  
Jie Li ◽  
Tongsheng Zhong ◽  
Liping Long
Keyword(s):  
Electrochemical Sensor ◽  
Molecular Imprinting ◽  
Neurological Disorders ◽  
Room Temperature ◽  
Low Cost ◽  
Differential Pulse ◽  
Current Response ◽  
Specific Selectivity ◽  
Pulse Voltammetry

Background: The unnatural levels of dopamine (DA) result in serious neurological disorders such as Parkinson’s disease. Electrochemical methods which have the obvious advantages of simple operation and low-cost instrumentation were widely used for determination of DA. In order to improve the measurement performance of the electrochemical sensor, molecular imprinting technique and graphene have always been employed to increase the selectivity and sensitivity. Methods: An electrochemical sensor which has specific selectivity to (DA) was proposed based on the combination of a molecular imprinting polymer (MIP) with a graphene (GR) modified gold electrode. The performance and effect of MIP film were investigated by differential pulse voltammetry (DPV) and cyclic voltammetry (CV) in the solution of 5.0 ×10-3 mol/L K3[Fe(CN)6] and K4[Fe(CN)6] with 0.2 mol/L KCl at room temperature. Results: This fabricated sensor has well repeatability and stability, and was used to determine the dopamine of urine. Under the optimized experiment conditions, the current response of the imprinted sensor was linear to the concentration of dopamine in the range of 1.0×10-7 ~ 1.0×10-5 mol/L, the linear equation was I (µA) = 7.9824+2.7210lgc (mol/L) with the detection limit of 3.3×10-8 mol/L. Conclusion: In this work, a highly efficient sensor for determination of DA was prepared with good sensitivity by GR and great selectivity of high special recognization ability by molecular imprinting membrane. This proposed sensor was used to determine the dopamine in human urine successfully.

scholarly journals Alternating current response of carbon nanotubes with randomly distributed impurities

2014 ◽  
Vol 105 (17) ◽  
pp. 173106 ◽  
Author(s):  
Daisuke Hirai ◽  
Takahiro Yamamoto ◽  
Satoshi Watanabe
Keyword(s):  
Carbon Nanotubes ◽  
Alternating Current ◽  
Current Response

scholarly journals Enhanced Cancer Cell (HeLa) Killing Efficacy of Mixed Αlpha and Gamma Iron Oxide Superparamagnetic Nanoparticles under Combined AC (Alternating Current) Magnetic-Field and Photoexcitation

1970 ◽  
Vol 12 (4) ◽  
Author(s):  
Md. Shariful Islam, Yoshihumi Kusumoto, Md. Abdulla Al-Mamun And Yuji Horie
Keyword(s):  
Magnetic Field ◽  
Iron Oxide ◽  
Hela Cells ◽  
Room Temperature ◽  
Heat Dissipation ◽  
Alternating Current ◽  
Superparamagnetic Nanoparticles ◽  
Gamma Iron ◽  
Ac Magnetic Field ◽  
Current Magnetic Field

We synthesized mixed α and γ-Fe2O3 nanoparticles and investigated their toxic effects against HeLa cells under induced AC (alternating current) magnetic-fields and photoexcited conditions at room temperature. The findings revealed that the cell-killing percentage was increased with increasing dose for all types of treatments. Finally, 99% cancer cells were destructed at 1.2 mL dose when exposed to combined AC magnetic-field and photoexcited conditions (T3) whereas 89 and 83 % of HeLa cells were killed under only AC magnetic-field induced (T1) or only photoexcited (T2) condition at the same dose.ABSTRAK: Campuran α dan zarah γ-Fe2O3 bersaiz nano disintesiskan dan kesan toksidnya terhadap sel HeLa dikaji dibawah aruhan medan magnet arus ulang-alik (alternating current (AC)) dan keadaan photoexcited (proses ransangan atom atau molekul suatu bahan dengan penyerapan tenaga sinaran) pada suhu bilik. Penemuan mendedahkan bahawa peratusan sel yang musnah bertambah dengan pertambahan dos untuk semua jenis rawatan. Akhirnya, 99% sel kanser dimusnahkan pada kadar dos 1.2mL setelah didedahkan terhadap kombinasi medan magnet AC dan keadaan photoexcited (T3) dimana 89% dan 83% sel HeLa dimusnahkan dengan hanya di bawah aruhan medan magnet AC (T1) atau hanya pada keadaan photoexcited (T2) pada kadar dos yang sama.KEY WORDS : Cancer, Hyperthermia, Iron oxide nanoparticles, Heat dissipation,    Cytotoxicity, HeLa cell.

Electrical and room temperature multiferroic properties of polyvinylidene fluoride nanocomposites doped with nickel ferrite nanoparticles

2019 ◽  
Vol 43 (7) ◽  
pp. 3128-3138 ◽  
Author(s):  
Dhiraj Kumar Rana ◽  
Suresh Kumar Singh ◽  
Shovan Kumar Kundu ◽  
Subir Roy ◽  
S. Angappane ◽  
...  
Keyword(s):  
Nickel Ferrite ◽  
Polyvinylidene Fluoride ◽  
Room Temperature ◽  
Ferrite Nanoparticles ◽  
Multiferroic Properties ◽  
Nickel Ferrite Nanoparticles

The higher values of magneto-dielectric coupling is observed in flexible multiferroic polyvinylidene fluoride (PVDF) nanocomposites doped with nickel ferrite (NFO) nanoparticles.

Alternating current field flash sintering 99% relative density ZnO ceramics at room temperature

2020 ◽  
Vol 176 ◽  
pp. 28-31 ◽  
Author(s):  
Jieming Liu ◽  
Xiang Li ◽  
Xilin Wang ◽  
Rongxia Huang ◽  
Zhidong Jia
Keyword(s):  
Relative Density ◽  
Room Temperature ◽  
Alternating Current ◽  
Current Field ◽  
Flash Sintering ◽  
Zno Ceramics
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