Interactions of Gold Nanoparticles with the Interior of Hollow Graphitized Carbon Nanofibers

Small ◽  
2012 ◽  
Vol 8 (8) ◽  
pp. 1222-1228 ◽  
Author(s):  
Alessandro La Torre ◽  
Michael W. Fay ◽  
Graham A. Rance ◽  
Maria del Carmen Gimenez-Lopez ◽  
William A. Solomonsz ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Carbon Nanofibers ◽  
Graphitized Carbon

The confinement effect on the activity of Au NPs in polyol oxidation

2016 ◽  
Vol 6 (3) ◽  
pp. 598-601 ◽  
Author(s):  
Alberto Villa ◽  
Di Wang ◽  
Carine E. Chan-Thaw ◽  
Sebastiano Campisi ◽  
Gabriel M. Veith ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Carbon Nanofibers ◽  
Confinement Effect ◽  
Au Nps ◽  
The One

We demonstrate a confinement effect where gold nanoparticles trapped within N-functionalized carbon nanofibers (N-CNFs) are more active for polyol oxidation and promote selectivity towards di-acid products, whereas AuNPs trapped on the surface produce as a major by-product the one derived from C–C cleavage.

Structure and electrochemical applications of boron-doped graphitized carbon nanofibers

2012 ◽  
Vol 23 (31) ◽  
pp. 315602 ◽  
Author(s):  
Jae-Seong Yeo ◽  
Sang-Min Jang ◽  
Jin Miyawaki ◽  
Bai An ◽  
Isao Mochida ◽  
...  
Keyword(s):  
Carbon Nanofibers ◽  
Graphitized Carbon ◽  
Boron Doped ◽  
Electrochemical Applications

Graphitized Carbon Nanofibers: new additive for the Negative Active Material of Lead Acid Batteries

2017 ◽  
Vol 257 ◽  
pp. 109-117 ◽  
Author(s):  
M. Blecua ◽  
E. Fatas ◽  
P. Ocon ◽  
B. Gonzalo ◽  
C. Merino ◽  
...  
Keyword(s):  
Carbon Nanofibers ◽  
Active Material ◽  
Graphitized Carbon ◽  
Lead Acid Batteries ◽  
Lead Acid

scholarly journals Assembly of Pt Nanoparticles on Graphitized Carbon Nanofibers as Hierarchically Structured Electrodes

2020 ◽  
Vol 3 (10) ◽  
pp. 9880-9888
Author(s):  
Nejc Hodnik ◽  
Luigi Romano ◽  
Primož Jovanovič ◽  
Francisco Ruiz-Zepeda ◽  
Marjan Bele ◽  
...  
Keyword(s):  
Carbon Nanofibers ◽  
Pt Nanoparticles ◽  
Graphitized Carbon

scholarly journals Development of a Novel Electrochemical Biosensor Based on Carbon Nanofibers–Gold Nanoparticles–Tyrosinase for the Detection of Ferulic Acid in Cosmetics

Sensors ◽  
2020 ◽  
Vol 20 (23) ◽  
pp. 6724
Author(s):  
Alexandra Virginia Bounegru ◽  
Constantin Apetrei
Keyword(s):  
Gold Nanoparticles ◽  
Ferulic Acid ◽  
Carbon Nanofibers ◽  
Electrochemical Biosensor ◽  
Detection Threshold ◽  
Infrared Range ◽  
Spectrometric Method ◽  
Sensitivity And Selectivity ◽  
Electroanalytical Method ◽  
Higher Sensitivity

The present paper deals with the electrochemical behavior of three types of sensors based on modified screen-printed electrodes (SPEs): a sensor based on carbon nanofibers (CNF/SPE), a sensor based on nanofibers of carbon modified with gold nanoparticles (CNF-GNP/SPE) and a biosensor based on nanofibers of carbon modified with gold nanoparticles and tyrosinase (CNF-GNP-Ty/SPE). To prepare the biosensor, the tyrosinase (Ty) was immobilized on the surface of the electrode already modified with carbon nanofibers and gold nanoparticles, by the drop-and-dry technique. The electrochemical properties of the three electrodes were studied by cyclic voltammetry in electroactive solutions, and the position and shape of the active redox peaks are according to the nature of the materials modifying the electrodes. In the case of ferulic acid, a series of characteristic peaks were observed, the processes being more intense for the biosensor, with the higher sensitivity and selectivity being due to the immobilization of tyrosinase, a specific enzyme for phenolic compounds. The calibration curve was subsequently created using CNF-GNP-Ty/SPE in ferulic acid solutions of various concentrations in the range 0.1–129.6 μM. This new biosensor allowed low values of the detection threshold and quantification limit, 2.89 × 10−9 mol·L−1 and 9.64 × 10−9 mol·L−1, respectively, which shows that the electroanalytical method is feasible for quantifying ferulic acid in real samples. The ferulic acid was quantitatively determined in three cosmetic products by means of the CNF-GNP-Ty/SPE biosensor. The results obtained were validated by means of the spectrometric method in the infrared range, the differences between the values of the ferulic acid concentrations obtained by the two methods being under 5%.

scholarly journals Novel Competitive Voltammetric Aptasensor Based on Electrospun Carbon Nanofibers-Gold Nanoparticles Modified Graphite Electrode for Salmonella enterica serovar Detection

2020 ◽  
Vol 11 (2) ◽  
pp. 8702-8715
Keyword(s):  
Gold Nanoparticles ◽  
Carbon Nanofibers ◽  
Electrochemical Detection ◽  
Salmonella Enterica ◽  
Electrochemical Impedance ◽  
Graphite Electrode ◽  
Limit Of Detection ◽  
Differential Pulse ◽  
Pencil Graphite Electrode ◽  
Experimental Conditions

Salmonella enterica is considered one of the most common bacterial agent causes of acute gastroenteritis and foodborne illness in humans worldwide. Antibiotic-resistant is considered as a major problem in Salmonella enterica Serovar. This study introduces a new simple and sensitive aptasensor based on chitosan (Chi)-electrospun carbon nanofibers (CNF) /gold nanoparticles (GNPs) decorated pencil graphite electrode (GE) as a novel platform for electrochemical detection of Salmonella enterica Serovar. A Salmonella-specific recognition aptamer ssDNA sequence was used in the development of this voltammetric biosensor. Electrochemical behaviors of electrodes; unmodified GE, CNF-Chi/GE, GNPs/CNF-Chi/GE, GNPs/CNF-Chi/GEs linked with the aptamer were studied by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). After the optimization of experimental conditions (e.g., CNF concentration, pH, and incubation time), electrochemical detection of Salmonella was performed via differential pulse voltammetry (DPV) in methylene blue solution. The designed aptasensor exhibited a linear range of 10 to 105 (CFU/mL) with the limit of detection (LOD) 1.223 (Cfu/mL) for Salmonella. This aptasensor displayed excellent selectivity and remarkable sensitivity in terms of the detection of Salmonella enterica even in the real samples as compared to the polymerase chain reaction (PCR) technique. The constructed aptasensor is a highly sensitive sensor for the detection of Salmonella enterica and also can be tailored for various other targets.

Fabrication of Gold Nanoparticles Modified Carbon Nanofibers/Polyaniline Electrode for H2O2Determination

2014 ◽  
Vol 161 (12) ◽  
pp. H816-H821 ◽  
Author(s):  
Shiyong Bao ◽  
Mingliang Du ◽  
Ming Zhang ◽  
Han Zhu ◽  
Pan Wang ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Carbon Nanofibers
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