Diffusion and Molecular Exchange in Hollow Core-Shell Silica Nanoparticles

Langmuir : the ACS Journal of Surfaces and Colloids
A PochertR Valiullin

Abstract

The diffusion behavior of small molecules in hollow core-shell nanocapsules was studied using pulsed field gradient NMR. By purposefully selecting the liquid saturating the hollow core and the porous shell and the solvent between the nanocapsules, two different situations corresponding to the excluded and admitted molecular exchange between the intra- and intercapsule liquids at the external boundary of the nanoparticles were covered. In the former case, corresponding to the reflective boundary condition for the molecules approaching the nanocapsule boundary, restricted diffusion in the complex pore space formed by the hollow core and the mesoporous shell was observed. The time-dependent diffusivities measured in the experiment were inter-related with the geometry of the intraparticle pore space. The thus assessed structural information was found to be in a good agreement with that provided by electron microscopy. In the case of the molecular exchange occurring between the two pools of molecules in the nanocapsules and between them, the diffusive dynamics of only the molecules remaining in the nanocapsules during the entire observation times was studied.

References

Oct 9, 2002·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Rustem Valiullin, István Furó
Jul 23, 2004·The Journal of Chemical Physics·Anja RumpleckerChristian Mayer
Sep 21, 2005·Langmuir : the ACS Journal of Surfaces and Colloids·Jason P HindmarshHarjinder Singh
Nov 1, 2005·Journal of Colloid and Interface Science·Helena WasseniusBrian Vincent
Feb 9, 2008·Physical Chemistry Chemical Physics : PCCP·J S Loveday, R J Nelmes
Oct 7, 2008·Langmuir : the ACS Journal of Surfaces and Colloids·Sang-Jae ParkSo-Jung Park
Nov 26, 2008·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Jesús Ruiz-CabelloJeff W M Bulte
May 8, 2009·Physical Chemistry Chemical Physics : PCCP·Rustem ValiullinRoger Gläser
Aug 22, 2009·Journal of Biomolecular NMR·Gang Zheng, William S Price
Apr 8, 2010·Langmuir : the ACS Journal of Surfaces and Colloids·Alexandre I RomoscanuEric Hughes
Jul 30, 2011·Chemical Society Reviews·Jing HuLimin Wu
Feb 9, 2012·Magnetic Resonance in Chemistry : MRC·R BernewitzH P Schuchmann
Oct 4, 2012·Langmuir : the ACS Journal of Surfaces and Colloids·Zhi Hong ChenGoran Ungar
Jul 9, 2014·Journal of Colloid and Interface Science·Swen LehmannWalter Richtering
Feb 6, 2015·Physical Chemistry Chemical Physics : PCCP·C C M Groot, H J Bakker
Nov 14, 2007·Soft Matter·Gavin A Buxton, Nigel Clarke

❮ Previous
Next ❯

Citations

Jan 14, 2016·Chemical Society Reviews·Daniel SchneiderRustem Valiullin
Oct 8, 2016·Chemical Reviews·Gonzalo PrietoFerdi Schüth
Aug 3, 2017·Physical Chemistry Chemical Physics : PCCP·Zhi Hong ChenGoran Ungar

❮ 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.