scholarly journals Synthesis of benzimidazolones by immobilized gold nanoparticles on chitosan extracted from shrimp shells supported on fibrous phosphosilicate

RSC Advances ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 6494-6501 ◽  
Author(s):  
Mahboobeh Zahedifar ◽  
Ali Es-haghi ◽  
Rahele Zhiani ◽  
Seyed Mohsen Sadeghzadeh
Keyword(s):  
Gold Nanoparticles ◽  
Composite Material ◽  
Shrimp Shells ◽  
Microcrystalline Chitosan

We demonstrate the synthesis of benzimidazolones from o-phenylenediamines and CO2 in the presence of gold nanoparticles supported on a composite material based on microcrystalline chitosan from shrimp shells and fibrous phosphosilicate.

scholarly journals Hybrid composite material based on polythiophene derivative nanofibers modified with gold nanoparticles for optoelectronics applications

2016 ◽  
Vol 52 (4) ◽  
pp. 1919-1929 ◽  
Author(s):  
Rafaela C. Sanfelice ◽  
Luiza A. Mercante ◽  
Adriana Pavinatto ◽  
Nathália B. Tomazio ◽  
Cleber R. Mendonça ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Composite Material ◽  
Hybrid Composite ◽  
Hybrid Composite Material ◽  
Polythiophene Derivative

scholarly journals Морфология и оптические свойства композитного материала на основе наночастиц золота и нестехиометрического оксида кремния

2020 ◽  
Vol 46 (16) ◽  
pp. 47
Author(s):  
А.О. Замчий ◽  
С.В. Старинский ◽  
Е.А. Баранов
Keyword(s):  
Gold Nanoparticles ◽  
Composite Material ◽  
Optical Properties ◽  
Silicon Oxide ◽  
Mie Theory ◽  
Ultraviolet Region ◽  
Spherical Nanoparticles ◽  
Structural And Optical Properties ◽  
Plasmon Peak ◽  
First Time

In this work, the morphology, structural and optical properties of a composite material based on gold nanoparticles and a thin film of amorphous non-stoichiometric silicon oxide (a-SiOx, x = 1.8) were studied for the first time. Based on the results obtained, it was experimentally shown that the a-SiO1.8 layer conformally covered the spherical nanoparticles. An analytical model based on the Mie theory well described the optical properties of the gold nanoparticles and the composite material in the ultraviolet region of the spectrum obtained from the experiment, as well as the change in the amplitude of the plasmon peak that occurs during the formation of the composite material.

Fluorescence properties of a composite material based on the 5CB nematic liquid crystal with gold nanoparticles

2011 ◽  
Vol 53 (11) ◽  
pp. 2333-2338 ◽  
Author(s):  
Yu. P. Piryatinski ◽  
A. Yu. Vakhnin ◽  
A. B. Verbitskii ◽  
A. K. Kadashchuk
Keyword(s):  
Gold Nanoparticles ◽  
Composite Material ◽  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Fluorescence Properties

scholarly journals Synthesis and characteristics of gold nanoparticles/Epoxy polymer Nano composite material

2019 ◽  
Vol 1279 ◽  
pp. 012005
Author(s):  
Ali H AlHamadany ◽  
M A Rajaa ◽  
Entidhar A Jassim ◽  
Noor A Zaid
Keyword(s):  
Gold Nanoparticles ◽  
Composite Material ◽  
Epoxy Polymer ◽  
Nano Composite

Gold nanoparticles–polyaniline composite material: Synthesis, structure and electrical properties

2011 ◽  
Vol 161 (13-14) ◽  
pp. 1408-1413 ◽  
Author(s):  
Tatiana Berzina ◽  
Andrea Pucci ◽  
Giacomo Ruggeri ◽  
Victor Erokhin ◽  
Marco P. Fontana
Keyword(s):  
Gold Nanoparticles ◽  
Composite Material ◽  
Electrical Properties ◽  
Material Synthesis

scholarly journals Electrochemical Sensing of Caffeic Acid Using Gold Nanoparticles Embedded in Poly(3,4-ethylenedioxythiophene) Layer by Sinusoidal Voltage Procedure

Chemosensors ◽  
2019 ◽  
Vol 7 (4) ◽  
pp. 65 ◽  
Author(s):  
Davide Bottari ◽  
Laura Pigani ◽  
Chiara Zanardi ◽  
Fabio Terzi ◽  
Sanda Victorinne Paţurcă ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Composite Material ◽  
Caffeic Acid ◽  
Glassy Carbon Electrode ◽  
Glassy Carbon ◽  
Electrochemical Sensing ◽  
Alcoholic Beverages ◽  
Carbon Electrode ◽  
Sinusoidal Voltage

The increasing demand for sensitive electrochemical sensors in various medical and industrial applications promotes the fabrication of novel sensing materials with improved electrocatalytic and analytical performances. This work deals with the development of a composite material based on gold nanoparticles (AuNPs) embedded in poly(3,4-ethylenedioxythiophene) (PEDOT) layer for electrochemical determination of caffeic acid (CA). CA is a phenolic compound with excellent antioxidant properties that is present in vegetables, fruits, and alcoholic and non-alcoholic beverages. Its analytical quantification is of great interest in food production monitoring and healthcare applications. Therefore, the development of sensitive analytical devices for CA monitoring is required. The AuNPs have been prepared in situ onto PEDOT coated glassy carbon electrode (GC) by means of an innovative procedure consisting on the use of a sinusoidal voltage (SV) superimposed on a constant potential. The physico-chemical properties of the PEDOT-AuNPs composite material were investigated by a range of techniques including cyclic voltammetry, electrochemical quartz crystal microbalance, and scanning electron microscopy. The glassy carbon electrode/poly(3,4-ethylenedioxythiophene)-gold nanoparticles-sinusoidal voltage (GC/PEDOT-AuNPs-SV) sensor exhibited good analytical performance toward the CA quantification with a linear response over a wide concentration range from 10 µM to 1 mM. In addition, the proposed GC/PEDOT-AuNPs-SV sensor was successfully applied in the determination of total polyphenols content expressed as equivalents of CA in juice samples.

Atomic structure of interface of intermetallic compound TiAl and nitride Ti2AIN using HREM and image processing

1991 ◽  
Vol 49 ◽  
pp. 570-571
Author(s):  
E. Sukedai ◽  
H. Mabuchi ◽  
H. Hashimoto ◽  
Y. Nakayama
Keyword(s):  
Mechanical Properties ◽  
Image Processing ◽  
Composite Material ◽  
Intermetallic Compound ◽  
Side Surface ◽  
High Resolution Electron Microscopy ◽  
Hexagonal Structure ◽  
Second Phase ◽  
Resolution Electron ◽  
Compound Tial

In order to improve the mechanical properties of an intermetal1ic compound TiAl, a composite material of TiAl involving a second phase Ti2AIN was prepared by a new combustion reaction method. It is found that Ti2AIN (hexagonal structure) is a rod shape as shown in Fig.1 and its side surface is almost parallel to the basal plane, and this composite material has distinguished strength at elevated temperature and considerable toughness at room temperature comparing with TiAl single phase material. Since the property of the interface of composite materials has strong influences to their mechanical properties, the structure of the interface of intermetallic compound and nitride on the areas corresponding to 2, 3 and 4 as shown in Fig.1 was investigated using high resolution electron microscopy and image processing.

The microstructure of a TiB2/Ti-47 Al composite material

1989 ◽  
Vol 47 ◽  
pp. 674-675
Author(s):  
O. Popoola ◽  
A.H. Heuer ◽  
P. Pirouz
Keyword(s):  
Composite Material ◽  
Ion Beam ◽  
Chemical Properties ◽  
Intermetallic Alloys ◽  
Transmission Electron ◽  
Diamond Polishing ◽  
Al Composite ◽  
The Matrix ◽  
Argon Ion ◽  
And Chemical Properties

The addition of fibres or particles (TiB2, SiC etc.) into TiAl intermetallic alloys could increase their toughness without compromising their good high temperature mechanical and chemical properties. This paper briefly discribes the microstructure developed by a TiAl/TiB2 composite material fabricated with the XD™ process and forged at 960°C.The specimens for transmission electron microscopy (TEM) were prepared in the usual way (i.e. diamond polishing and argon ion beam thinning) and examined on a JEOL 4000EX for microstucture and on a Philips 400T equipped with a SiLi detector for microanalyses.The matrix was predominantly γ (TiAl with L10 structure) and α2(TisAl with DO 19 structure) phases with various morphologies shown in figure 1.

Sign in / Sign up

Export Citation Format

Share Document