The role of nitrogen-carbon dots (NC) nano-particles in enhancing thermoelectric power functions of PEDOT:PSS/Te nano-composite films

2021 ◽  
Vol 417 ◽  
pp. 129212
Author(s):  
Ahmed Gamal El-Shamy
Keyword(s):  
Thermoelectric Power ◽  
Carbon Dots ◽  
Composite Films ◽  
Nano Particles ◽  
Power Functions ◽  
Nano Composite

Fabrication, Characterization and Adsorptive of Human Fibrinogen of HA/PHBV Nano Composite Films

2010 ◽  
Vol 160-162 ◽  
pp. 1325-1330
Author(s):  
Jun Yuan ◽  
Qi Xin Zheng ◽  
Jian Cheng
Keyword(s):  
Mechanical Properties ◽  
Composite Films ◽  
Nano Particles ◽  
Solvent Casting ◽  
Casting Method ◽  
Human Fibrinogen ◽  
Nano Composite ◽  
Nano Scale

In this investigation, nano-scale hydroxyapatite (HA) particles were incorporated in poly(hydroxybutyrate-co-valerate) (PHBV) polymer to fabricate composite films using solvent casting method. The morphologies, mechanical properties and adsorptive of human fibrinogen of the composite films were investigated. The HA nano-particles were dispersed in the films and well bonded to the polymer. The strength of films could be enhanced and its adsorptive of human fibrinogen could be also improved greatly by introducing HA nano-particles into the films. The results suggested these newly developed nano-HA/PHBV composite films might serve as an effective biomedicine material.

scholarly journals The Role of Nano-SiC on Microstructure and Tribo-logical Properties of SiC/Cu Nano-Composite

2020 ◽  
pp. 35-44
Author(s):  
M. A. Metwally ◽  
M. M. Sadawy ◽  
M. Ghanem ◽  
I. G. El- Batanony
Keyword(s):  
Constant Pressure ◽  
Copper Matrix ◽  
Nano Particles ◽  
Grain Structure ◽  
Nacl Solution ◽  
Composite Powders ◽  
Nano Composite ◽  
Xrd Diffraction ◽  
Pin On Disk

The present study has investigated the role of nano-SiC on microstructure and tribological properties of SiC/Cu nano-composite. The nano-composite powders have been cold compacted under a constant pressure of 480 MPa and sintered at 8600 C under argon gas for 2 h. SEM-EDS and XRD diffraction were performed for microstructure examinations. Pin-on-disk experiments were carried out under wet conditions (3.5 wt. % NaCl solution). All samples have been investigated against abrasives of different sizes (from 7, 13, 20 and 26 µm), at different applied loads (10, 15, 20 and 25 N), and sliding speed (0.25, 0.5, 0.75 and 1.0 m/s).  The results revealed   that the grain structure of the copper matrix was reduced with increasing SiC nano-particles. Furthermore, it was found that the wet wear resistance was improved as a function of nano-SiC content.

The role of interfaces in PI matrix nano composite films on electrical properties

2018 ◽  
Vol 69 ◽  
pp. 405-409 ◽  
Author(s):  
Xu Xia ◽  
Jinghua Yin ◽  
Minghua Chen ◽  
Xiaoxu Liu
Keyword(s):  
Electrical Properties ◽  
Composite Films ◽  
Nano Composite

scholarly journals The Role of Interface in Fabrication of Clay-Polyolefin (PO) Nanocomposites: Computation and Reality

2006 ◽  
Author(s):  
Minh-Tan Ton-That ◽  
Jianming Li ◽  
Weawkamol Leelapornpisit
Keyword(s):  
Polymer Nanocomposites ◽  
Interfacial Interaction ◽  
Nano Particles ◽  
Nano Composite ◽  
Complex Issue ◽  
Clay Surface ◽  
Modeling And Experiments ◽  
Polypropylene Matrix ◽  
Nano Size

The effect of interfacial interaction between the nano-particles and the polymer matrix plays a determined role in the fabrication of polymer nanocomposites. For layered structure nano-particles like nanoclays, depending on the level of such interaction, the dispersion of the nanoclays can vary from micro-size (micro-composite) to nano-size (nano-composite, both intercalated and exfoliated structure). This article focuses on the effect of the interaction between the nanoclay and polypropylene matrix on the dispersion of the obtained nanocomposites. Both computation (molecular modeling) and experiments have been conducted on various systems (with different modifications of clay surface) in order to get a better understanding about this complex issue. The results have provided different useful highlights for the fabrication of polyolefin nanocomposites.

scholarly journals Superfluid density from magnetic penetration depth measurements in Nb–Cu 3D nano-composite films

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Chandan Gupta ◽  
Pradnya Parab ◽  
Sangita Bose
Keyword(s):  
Film Thickness ◽  
Energy Gap ◽  
Composite Films ◽  
Nano Particles ◽  
Imaginary Component ◽  
Nano Composite ◽  
Phase Fluctuations ◽  
Cu Content ◽  
Superconducting Energy Gap ◽  
Two Peaks

Abstract Superconductivity in 3D Nb–Cu nanocomposite granular films have been studied with varying thickness for two different compositions, Nb rich with 88 at% of Nb and Cu rich with 46 at% of Nb. For both compositions, the superconducting transition temperature (Tc) decreases with decreasing film thickness. For any thickness, doubling the Cu content in the films decreases the Tc by about 2 K. To explore if phase fluctuations play any role in superconductivity in these 3D films, the superfluid stiffness (JS) of the films was measured using low frequency two-coil mutual inductance (M) technique. Interestingly, the measurement of M in magnetic fields showed two peaks in the imaginary component of M for both Nb rich and Cu rich films. The two peaks were associated with the pair-breaking effect of the magnetic field on the intra and inter-granular coupling in these films consisting of random network of superconductor (S) and normal metal (N) nano-particles. Furthermore, JS was seen to decrease with decreasing film thickness and increasing Cu content. However, for all films studied JS remained higher than the superconducting energy gap (∆) indicating that phase fluctuations do not play any role in superconductivity in the film thickness and composition range investigated. Our results indicate that an interplay of quantum size effects (QSE) and superconducting proximity effect (SPE) controls the Tc with composition in these 3D nano-composite films.

Preparation of C-Ru-RuO2 Nano-Composite Films by Plasma-Enhanced CVD and their Electrode Property

2007 ◽  
Vol 350 ◽  
pp. 155-158 ◽  
Author(s):  
Masato Sakata ◽  
Teiichi Kimura ◽  
Takashi Goto
Keyword(s):  
Electrical Conductivity ◽  
Gas Flow ◽  
Volume Fraction ◽  
Composite Films ◽  
Composite Layer ◽  
Nano Particles ◽  
Composite Electrodes ◽  
Concentration Cell ◽  
Nano Composite ◽  
Oxygen Gas

C-Ru-RuO2 nano-composite films were prepared by plasma-enhanced chemical vapor deposition and their microstructure and electrode properties were investigated. Ru-C nano-composite films consisted of Ru nano-particles of 3 nm in diameter and an amorphous C matrix. With increasing oxygen gas flow rate (FRO2), the volume fraction of C decreased from 0.91 to 0 and Ru nano-particle size increased from 2.5 to 4.5 nm. At high FRO2, the film consisted on the fibrous RuO2 and Ru-C nano-composite layer. Ru-C nano-composite containing 91 vol% C showed the highest interfacial electrical conductivity below 673 K, and Ru-C/RuO2 composite containing 0 – 5 vol% C showed the highest interfacial electrical conductivity at 873 K. Electro-motive-force (EMF) values of an oxygen concentration cell constructed from a YSZ electrolyte and Ru-C or Ru-C/RuO2 composite electrodes responded to the change of oxygen gas partial pressure at more than 473 K. The response time of the concentration cell with Ru-C nano-composite electrodes at 573 K was less than 10 s, and that with Ru-C/RuO2 composite electrodes was about 300 s.

Laser Emission in PMMA Nano-Composite Films

2007 ◽  
Vol 121-123 ◽  
pp. 1233-1236
Author(s):  
Xiao Hong Sun ◽  
Xiao Ming Tao ◽  
Pu Xue ◽  
Jian Guo Deng ◽  
Kwan Kai Cheong
Keyword(s):  
Scanning Probe Microscopy ◽  
Laser Emission ◽  
Composite Films ◽  
Film Structure ◽  
Nano Particles ◽  
Scanning Probe ◽  
Pmma Film ◽  
Random Laser ◽  
Nano Composite ◽  
Low Threshold

In this article, low-threshold random laser with one mirror and feedback is investigated in PMMA film containing Rhodamine 590 and TiO2 nano-particles. Incoherent and coherent laser emission is observed. Optics microscopy and Scanning Probe Microscopy are used to investigate the film structure and the principle of incoherent and coherent laser is analyzed.

Recent Progress in the Analysis of Captopril Using Electrochemical Methods: A Review

2019 ◽  
Vol 15 (3) ◽  
pp. 198-206 ◽  
Author(s):  
Sarfaraz Ahmed Mahesar ◽  
Saeed Ahmed Lakho ◽  
Syed Tufail Hussain Sherazi ◽  
Hamid Ali Kazi ◽  
Kamran Ahmed Abro ◽  
...  
Keyword(s):  
Enzyme Inhibitor ◽  
Modified Electrodes ◽  
High Sensitivity ◽  
Pharmaceutical Formulations ◽  
Inorganic Materials ◽  
Electrochemical Methods ◽  
Nano Particles ◽  
Moderate Heart Failure ◽  
Analytical Instrumentation

Background: Captopril is the synthetic dipeptide used as an angiotensin converting enzyme inhibitor. Captopril is used to treat hypertension as well as for the treatment of moderate heart failure. Analytical instrumentation and methodology plays an important role in pharmaceutical analysis. Methods: This review presents some important applications of electrochemical modes used for the analysis of captopril. So far captopril has been analyzed by using different bare and modified working electrodes with a variety of modifiers from organic and inorganic materials to various types of nano particles/materials. Results: This paper presents some of the methods which have been published in the last few years i.e. from 2003 to 2016. This review highlights the role of the analytical instrumentation, particularly electrochemical methods in assessing captopril using various working electrodes. Conclusion: A large number of studies on voltammetry noted by means of various bare and modified electrodes. Among all of the published voltammetric methods, DPV, SWV, CV and miscellaneous modes were trendy techniques used to analyze captopril in pharmaceutical formulations as well as biological samples. Electrodes modified with nanomaterials are promising sensing tools as this showed high sensitivity, good accuracy with precision as well as selectivity. In comparison to chromatographic methods, the main advantages of electrochemical methods are its cheaper instrumentation, lower detection limit and minimal or no sample preparation.

Sign in / Sign up

Export Citation Format

Share Document