Surface Activity of Poly(ethylene glycol)-Coated Silver Nanoparticles in the Presence of a Lipid Monolayer

Langmuir : the ACS Journal of Surfaces and Colloids
Nasim GanjiG D Bothun

Abstract

We have investigated the surface activity of poly(ethylene glycol) (PEG)-coated silver nanoparticles (Ag-PEG) in the presence or absence of lipid monolayers comprised of monounsaturated dioleoylphosphocholine and dioleoylphosphoglycerol (DOPC/DOPG; 1:1 mol ratio). Dynamic measurements of surface pressure demonstrated that Ag-PEG were surface-active at the air/water interface. Surface excess concentrations suggested that at high Ag-PEG subphase concentrations, Ag-PEG assembled as densely packed monolayers in the presence and absence of a lipid monolayer. The presence of a lipid monolayer led to only a slight decrease in the excess surface concentration of Ag-PEG. Surface pressure-area isotherms showed that in the absence of lipids Ag-PEG increased the surface pressure up to 45 mN m-1 upon compression before the Ag-PEG surface layer collapsed. Our results suggest that surface activity of Ag-PEG was due to hydrophobic interactions imparted by a combination of the amphiphilic polymer coating and the hydrophobic dodecanethiol ligands bound to the Ag-PEG surface. With lipid present, Ag-PEG + lipid surface pressure-area (π-A) isotherms reflected Ag-PEG incorporation within the lipid monolayers. At high Ag-PEG concentrations, the π-A i...Continue Reading

References

Apr 9, 2008·Annual Review of Physical Chemistry·Ka Yee C Lee
May 13, 2009·Molecular Pharmaceutics·Chiranjeevi PeetlaVinod Labhasetwar
Jun 16, 2009·Nature Materials·Andre E NelMike Thompson
Sep 28, 2010·Langmuir : the ACS Journal of Surfaces and Colloids·Mathieu LaurencinChristine Ménager
Jan 1, 2007·Nanoscale Research Letters·K Ted ThurnGayle E Woloschak
Jun 26, 2012·Langmuir : the ACS Journal of Surfaces and Colloids·Karol VegsoOleg Konovalov
Jul 7, 2012·Nano Letters·Zong-ming XiuPedro J J Alvarez
Mar 27, 2013·Colloids and Surfaces. B, Biointerfaces·Adriano A TorranoAna Barros-Timmons
Aug 21, 2013·Langmuir : the ACS Journal of Surfaces and Colloids·Siheng Sean YouBinhua Lin
Oct 2, 2013·Environmental Science & Technology·Peng Yi, Kai Loon Chen
Dec 18, 2013·Environmental Science & Technology·Kai Loon Chen, Geoffrey D Bothun
May 8, 2015·Langmuir : the ACS Journal of Surfaces and Colloids·Renee V GorehamIngo Köper
May 10, 2015·Journal of Colloid and Interface Science·Sanna Maria Sofi BjörkegrenAnders E C Palmqvist
Nov 13, 2015·Colloids and Surfaces. B, Biointerfaces·Eduardo GuzmánFrancesca Ravera
Jan 17, 2016·Nanomedicine : Nanotechnology, Biology, and Medicine·Janine BrodaWolfgang Wenzel
Jul 28, 2016·Langmuir : the ACS Journal of Surfaces and Colloids·Ibrahim AzadElias Stefanakos
May 11, 2017·Langmuir : the ACS Journal of Surfaces and Colloids·Akram AbbasiGeoffrey D Bothun

❮ Previous
Next ❯

Citations

Feb 3, 2021·The Journal of Physical Chemistry. B·Sheikh I HossainSuvash C Saha
Dec 7, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Rajpreet KaurMandeep Singh Bakshi

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.