Fabrication of polypyrrole nanoplates decorated with silver and gold nanoparticles for sensor applications

RSC Advances ◽  
2015 ◽  
Vol 5 (85) ◽  
pp. 69745-69752 ◽  
Author(s):  
Junwei Ding ◽  
Kai Zhang ◽  
Gang Wei ◽  
Zhiqiang Su
Keyword(s):  
Gold Nanoparticles ◽  
Self Assembly ◽  
Electrocatalytic Activity ◽  
Assembly Process ◽  
Silver And Gold Nanoparticles ◽  
Sensor Applications

The PPyNPT–Ag and PPyNPT–Au nanohybrids fabricated by self-assembly process exhibit excellent electrocatalytic activity toward H2O2 and DA, respectively.

Large mesoporous carbons decorated with silver and gold nanoparticles by a self-assembly method: enhanced electrocatalytic activity for H2O2 electroreduction and sodium nitrite electrooxidation

RSC Advances ◽  
2015 ◽  
Vol 5 (4) ◽  
pp. 2956-2962 ◽  
Author(s):  
X. J. Yang ◽  
Y. H. Wang ◽  
J. Bai ◽  
X. Y. He ◽  
X. E. Jiang
Keyword(s):  
Gold Nanoparticles ◽  
Sodium Nitrite ◽  
Self Assembly ◽  
Electrocatalytic Activity ◽  
Mesoporous Carbon ◽  
Mesoporous Carbons ◽  
Silver And Gold Nanoparticles ◽  
Assembly Method

The silver, gold nanoparticles were grown onto poly (diallyldimethyl ammoniumchloride, PDDA)-functionalized large mesoporous carbon (LMC) by simple self-assembly method. AuNPs or AgNPs/PDDA–LMC show superior electrocatalytic activity.

scholarly journals Electrodeposition–Assisted Assembled Multilayer Films of Gold Nanoparticles and Glucose Oxidase onto Polypyrrole-Reduced Graphene Oxide Matrix and Their Electrocatalytic Activity toward Glucose

Nanomaterials ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 993 ◽  
Author(s):  
Baoyan Wu ◽  
Shihua Hou ◽  
Yongyong Xue ◽  
Zhan Chen
Keyword(s):  
Gold Nanoparticles ◽  
Graphene Oxide ◽  
Glucose Oxidase ◽  
Reduced Graphene Oxide ◽  
Self Assembly ◽  
Electrocatalytic Activity ◽  
Multilayer Films ◽  
Glucose Biosensor ◽  
Future Design ◽  
Reduced Graphene

The study reports a facile and eco-friendly approach for nanomaterial synthesis and enzyme immobilization. A corresponding glucose biosensor was fabricated by immobilizing the gold nanoparticles (AuNPs) and glucose oxidase (GOD) multilayer films onto the polypyrrole (PPy)/reduced graphene oxide (RGO) modified glassy carbon electrode (GCE) via the electrodeposition and self-assembly. PPy and graphene oxide were first coated on the surface of a bare GCE by the electrodeposition. Then, AuNPs and GOD were alternately immobilized onto PPy-RGO/GCE electrode using the electrodeposition of AuNPs and self-assembly of GOD to obtain AuNPs-GOD multilayer films. The resulting PPy-RGO-(AuNPs-GOD)n/GCE biosensors were used to characterize and assess their electrocatalytic activity toward glucose using cyclic voltammetry and amperometry. The response current increased with the increased number of AuNPs-GOD layers, and the biosensor based on four layers of AuNPs-GOD showed the best performance. The PPy-RGO-(AuNPs-GOD)4/GCE electrode can detect glucose in a linear range from 0.2 mM to 8 mM with a good sensitivity of 0.89 μA/mM, and a detection limit of 5.6 μM (S/N = 3). This study presents a promising eco-friendly biosensor platform with advantages of electrodeposition and self-assembly, and would be helpful for the future design of more complex electrochemical detection systems.

Arginine-assisted synthesis of palladium nanochain networks and their enhanced electrocatalytic activity for borohydride oxidation

RSC Advances ◽  
2015 ◽  
Vol 5 (23) ◽  
pp. 18111-18115 ◽  
Author(s):  
Geng-Tao Fu ◽  
Rui Wu ◽  
Chang Liu ◽  
Jun Lin ◽  
Dong-Mei Sun ◽  
...  
Keyword(s):  
Self Assembly ◽  
Electrocatalytic Activity ◽  
Oxidation Reaction ◽  
Three Dimensional ◽  
Assembly Process ◽  
Electrocatalytic Performance ◽  
Borohydride Oxidation

Three-dimensional Pd nanochain networks (Pd-NCNs) were prepared by an arginine-assisted self-assembly process, exhibiting excellent electrocatalytic performance towards the borohydride oxidation reaction.

Self Assembly in Biologically Synthesized Electrospun Electroactive Polymers

2005 ◽  
Vol 889 ◽  
Author(s):  
A. Bishop ◽  
P. Gouma
Keyword(s):  
Enzyme Immobilization ◽  
Self Assembly ◽  
Charge Separation ◽  
Chemical Sensor ◽  
Electroactive Polymers ◽  
Processing Parameters ◽  
The Self ◽  
Assembly Process ◽  
Composite Matrix ◽  
Sensor Applications

ABSTRACTThe processing parameters of polyaniline (PANI) dictate the desired morphology and overall structural stability of the deposited polymer for biological and chemical sensor applications. Electrospun composites of leucoemeraldine based PANI (LEB-PANI) has exhibited effective separation of aggregates inherent in LEB-PANI powder as a result of charge separation induced on the composite matrix during electrospinning. However it appears the encapsulation of biological (enzyme-Urease E.C.3.5.1.5) in the electrospun matrix intensifies the self assembly process. An investigation of the changes in morphology as an effect of electrospinning and enzyme immobilization is discussed.

Spectroscopic and electron microscopic analysis of bi-ligand functionalized glycopolymer/FITC–gold nanoparticles

RSC Advances ◽  
2016 ◽  
Vol 6 (50) ◽  
pp. 44392-44401 ◽  
Author(s):  
Kashyap Dave ◽  
N. Naga Malleswara Rao ◽  
Mummuluri Trinadh ◽  
B. Anu Monisha ◽  
Annadanam V. Sesha Sainath ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Binding Affinity ◽  
Self Assembly ◽  
Microscopic Analysis ◽  
Electron Microscopic Analysis ◽  
Assembly Process ◽  
Electron Microscopic ◽  
Relative Binding Affinity ◽  
Relative Binding

We report a strategy to quantify the relative binding affinity of glycopolymers on FITC-AuNP by release of the FITC via self-assembly process and which was improved by introducing a PEG segment to the glycopolymer of similar functionalities.

Directed Self-Assembly of Gold Nanoparticles on Graphene-Ionic Liquid Hybrid for Enhancing Electrocatalytic Activity

2011 ◽  
Vol 23 (4) ◽  
pp. 850-857 ◽  
Author(s):  
Min Ho Yang ◽  
Bong Gill Choi ◽  
HoSeok Park ◽  
Tae Jung Park ◽  
Won Hi Hong ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Ionic Liquid ◽  
Self Assembly ◽  
Electrocatalytic Activity

Preparation of BSA Nanoparticles by Desolvation Technique Using Acetone as Desolvating Agent

2012 ◽  
Vol 5 (1) ◽  
pp. 1643-1647
Author(s):  
Krishna Sailaja A ◽  
Amareshwar P
Keyword(s):  
Aqueous Solution ◽  
Standard Deviation ◽  
Process Parameters ◽  
Self Assembly ◽  
Size Control ◽  
Polymeric Materials ◽  
Preparation Condition ◽  
Assembly Process ◽  
Average Size

In order to see the functionality and toxicity of nanoparticles in various food and drug applications, it is important to establish procedures to prepare nanoparticles of a controlled size. Desolvation is a thermodynamically driven self-assembly process for polymeric materials. In this study, we prepared BSA nanoparticles using the desolvation technique using acetone as desolvating agent. Acetone was added intermittently into 1% BSA solution at different pH under stirring at 700 rpm. Amount of acetone added, intermittent timeline of acetone addition, and pH of solution were considered as process parameters to be optimized. The effect of the process parameters on size of the nanoparticles was studied. The results indicated that the size control of BSA nanoparticles was achieved by adding acetone intermittently. The standard deviation of average size of BSA nanoparticles at each preparation condition was minimized by adding acetone intermittently. The intermittent addition in polymeric aqueous solution can be useful for size control for food or drug applications.  

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