Programming nanoparticle aggregation kinetics with poly(MeO2MA-co-OEGMA) copolymers

Soft Matter ◽  
2013 ◽  
Vol 9 (46) ◽  
pp. 11046 ◽  
Author(s):  
Filippo Gambinossi ◽  
Munish Chanana ◽  
Steven E. Mylon ◽  
James K. Ferri
Keyword(s):  
Aggregation Kinetics ◽  
Nanoparticle Aggregation

Adsorbate-Induced Silver Nanoparticle Aggregation Kinetics

2005 ◽  
Vol 109 (31) ◽  
pp. 14755-14758 ◽  
Author(s):  
Martin Moskovits ◽  
Blanka Vlčková
Keyword(s):  
Silver Nanoparticle ◽  
Aggregation Kinetics ◽  
Nanoparticle Aggregation

Emerging investigator series: quantifying silver nanoparticle aggregation kinetics in real-time using particle impact voltammetry coupled with UV-vis spectroscopy

2020 ◽  
Vol 7 (9) ◽  
pp. 2509-2521
Author(s):  
Laela Ezra ◽  
Zachary J. O'Dell ◽  
Janan Hui ◽  
Kathryn R. Riley
Keyword(s):  
Silver Nanoparticles ◽  
Real Time ◽  
Silver Nanoparticle ◽  
Particle Impact ◽  
Aggregation Kinetics ◽  
Nanoparticle Aggregation ◽  
Analytical Technique ◽  
Single Nanoparticle ◽  
Vis Spectroscopy

This work describes the development of an analytical technique that couples single nanoparticle electrochemistry and UV-vis spectroscopy to determine aggregation kinetics and critical coagulation concentrations (CCCs) of silver nanoparticles.

scholarly journals Impact of multivalent charge presentation on peptide–nanoparticle aggregation

2015 ◽  
Vol 11 ◽  
pp. 792-803 ◽  
Author(s):  
Daniel Schöne ◽  
Boris Schade ◽  
Christoph Böttcher ◽  
Beate Koksch
Keyword(s):  
Electrostatic Interactions ◽  
Materials Science ◽  
Quaternary Structure ◽  
Coiled Coil ◽  
Nanoparticle Assembly ◽  
Aggregation Kinetics ◽  
Nanoparticle Aggregation ◽  
Highly Sensitive ◽  
Induced Aggregation

Strategies to achieve controlled nanoparticle aggregation have gained much interest, due to the versatility of such systems and their applications in materials science and medicine. In this article we demonstrate that coiled-coil peptide-induced aggregation based on electrostatic interactions is highly sensitive to the length of the peptide as well as the number of presented charges. The quaternary structure of the peptide was found to play an important role in aggregation kinetics. Furthermore, we show that the presence of peptide fibers leads to well-defined nanoparticle assembly on the surface of these macrostructures.

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.

Thermally Reversible Nanoparticle Aggregation Explains Magnetic Moment Increase with Temperature

2013 ◽  
Vol 9 (3) ◽  
pp. 381-386 ◽  
Author(s):  
Bashar Issa ◽  
Ihab M. Obaidat ◽  
Shahnaz M. Qadri ◽  
Tahir Abdulrehman ◽  
Yousef Haik
Keyword(s):  
Magnetic Moment ◽  
Nanoparticle Aggregation

scholarly journals CRISPR/Cas12a-mediated gold nanoparticle aggregation for colorimetric detection of SARS-CoV-2

2021 ◽  
Author(s):  
Yiren Cao ◽  
Jinjun Wu ◽  
Bo Pang ◽  
Hongquan Zhang ◽  
X. Chris Le
Keyword(s):  
Gold Nanoparticles ◽  
Gold Nanoparticle ◽  
Colorimetric Detection ◽  
Isothermal Amplification ◽  
Nanoparticle Aggregation ◽  
Cleavage Activity ◽  
Gold Nanoparticle Aggregation

The trans-cleavage activity of the target-activated CRISPR-Cas12a liberated an RNA crosslinker from a molecular transducer, which facilitated assembly of gold nanoparticles. Integration of the molecular transducer with isothermal amplification and...

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