Influence of dissolved oxygen on aggregation kinetics of citrate-coated silver nanoparticles

2011 ◽  
Vol 159 (12) ◽  
pp. 3757-3762 ◽  
Author(s):  
Wen Zhang ◽  
Ying Yao ◽  
Kungang Li ◽  
Ying Huang ◽  
Yongsheng Chen
Keyword(s):  
Silver Nanoparticles ◽  
Dissolved Oxygen ◽  
Aggregation Kinetics ◽  
Kinetics Of

The impact of stabilization mechanism on the aggregation kinetics of silver nanoparticles

2012 ◽  
Vol 429 ◽  
pp. 325-331 ◽  
Author(s):  
Amro M. El Badawy ◽  
Kirk G. Scheckel ◽  
Makram Suidan ◽  
Thabet Tolaymat
Keyword(s):  
Silver Nanoparticles ◽  
Aggregation Kinetics ◽  
Stabilization Mechanism ◽  
The Impact ◽  
Kinetics Of

scholarly journals Stability and Aggregation Kinetics of Silver Nanoparticles in Water in Oil Microemulsions of Cetyltrimethylammonium Bromide and Triton X-100

2017 ◽  
Vol 9 (4) ◽  
pp. 431-447 ◽  
Author(s):  
F. Begum ◽  
S. A. Jahan ◽  
M. Y. A. Mollah ◽  
M. M. Rahman ◽  
M. A. B. H. Susan
Keyword(s):  
Silver Nanoparticles ◽  
Cetyltrimethylammonium Bromide ◽  
Molar Ratio ◽  
Aggregation Kinetics ◽  
Average Particle ◽  
Time Intervals ◽  
Size Stability ◽  
Triton X ◽  
Kinetics Of ◽  
Preparative Route

Water in oil (W/O) microemulsions are simple preparative route for nanoparticles where water droplets dispersed in oil stabilized by surfactant or surfactant and cosurfactant monolayer act as nanoreactors to carry out chemical reactions. In this work, silver nanoparticles (AgNPs) were prepared in W/O microemulsions of cetyltrimethylammonium bromide (CTAB) and triton X-100 (TX-100) by using AgNO3 and NaBH4 as a precursor salt and reducing agent, respectively. To prepare microemulsions, CTAB or TX-100, 1-pentanol, cyclohexane and water were mixed with different molar ratio. AgNPs were prepared with different [AgNO3] in microemulsions of CTAB with fixed water to surfactant ratio (Wo). Average particle sizes were determined from dynamic light scattering (DLS) measurements. AgNPs prepared from microemulsions of CTAB were unstable while from TX-100, NPs were stable. Aggregation kinetics was investigated by measuring the absorbance at definite time intervals at the absorption maximum, ?max of AgNPs in different media under pseudo-first-order conditions. The aggregation behavior was studied at different [AgNO3]:[NaBH4] and Wo and the parameters were optimized to ensure formation of stable AgNPs without aggregation in microemulsions. This would help tuning the size, stability, and aggregation kinetics of AgNPs by controlling the nature of the surfactant and composition of the microemulsions.

Dissolution-Accompanied Aggregation Kinetics of Silver Nanoparticles

Langmuir ◽  
2010 ◽  
Vol 26 (22) ◽  
pp. 16690-16698 ◽  
Author(s):  
Xuan Li ◽  
John J. Lenhart ◽  
Harold W. Walker
Keyword(s):  
Silver Nanoparticles ◽  
Aggregation Kinetics ◽  
Kinetics Of

Functional Fractionation of Platelets: Aggregation Kinetics and Glycoprotein Labeling of Differing Platelet Populations

1982 ◽  
Vol 48 (02) ◽  
pp. 211-216 ◽  
Author(s):  
V M Haver ◽  
A R L Gear
Keyword(s):  
Galactose Oxidase ◽  
Aggregation Kinetics ◽  
Maximal Rate ◽  
Membrane Glycoproteins ◽  
Whole Cells ◽  
Reversible Aggregation ◽  
Significant Difference ◽  
Small Doses ◽  
Major Loss ◽  
Kinetics Of

SummaryPlatelet heterogeneity has been studied with a technique called functional fractionation which employs gentle centrifugation to yield subpopulations (“reactive” and “less-reactive” platelets) after exposure to small doses of aggregating agent. Aggregation kinetics of the different platelet populations were investigated by quenched-flow aggregometry. The large, “reactive” platelets were more sensitive to ADP (Ka = 1.74 μM) than the smaller “less-reactive” platelets (Ka = 4.08 μM). However, their maximal rate of aggregation (Vmax, % of platelets aggregating per sec) of 23.3 was significantly lower than the “less-reactive” platelets (Vmax = 34.7). The “reactive” platelets had a 2.2 fold higher level of cyclic AMP.Platelet glycoproteins were labeled using the neuraminidase-galactose oxidase – [H3]-NaBH4 technique. When platelets were labeled after reversible aggregation, the “reactive” platelets showed a two-fold decrease in labeling efficiency (versus control platelets). However, examination of whole cells or membrane preparations from reversibly aggregated platelets revealed no significant difference in Coomassie or PAS (Schiff) staining.These results suggest that the large, “reactive” platelets are more sensitive to ADP but are not hyperaggregable in a kinetic sense. Reversible aggregation may cause a re-orientation of membrane glycoproteins that is apparently not characterized by a major loss of glycoprotein material.

Effect of CTABr (surfactant) on the kinetics of formation of silver nanoparticles by Amla extract

2021 ◽  
Vol 329 ◽  
pp. 115537
Author(s):  
Nazia Iqbal ◽  
S.M. Shakeel Iqubal ◽  
Aejaz Abdullatif Khan ◽  
Tasneem Mohammed ◽  
Ali Mohamed Alshabi ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Kinetics Of Formation ◽  
Kinetics Of
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