| Transient colloidal stability controls the particle formation SBA-15. | |
| | |
MedLine Citation:
|
PMID: 22758927 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
|
A hypothesis about (transient) colloidal stability as a controlling mechanism for particle formation in SBA-15 is presented. The hypothesis is based on results from both in-situ and ex-situ investigations including cryogenic transmission electron microscopy (cryo-TEM), UV-vis spectroscopy and dynamic light scattering (DLS). Cryo-TEM images show that particles grow via the formation of silica-Pluronic-water "flocs", which coalesce in a seemingly arbitrary manner. Despite this, the final material consists of well-defined particles with a small size distribution. We argue that the interface between the flocs and surrounding media is covered by Pluronic-molecules, which provide steric stabilization. As the flocs grow the coverage of polymers at the interface is increased until a stable size is reached, and that regulates the particle size. By targeting the characteristics of the Pluronic molecules, during the on-going synthesis, the hypothesis is tested. The results are consistent with the concept of (transient) colloidal stability. |
| | |
Authors:
|
Juanfang Ruan; Tomas Kjellman; Yasuhiro Sakamoto; Viveka Alfredsson |
Related Documents
:
|
9496647 - Voc concentration in taiwan's household drinking water. 22443717 - One-pot surfactantless route to polyaniline hollow nanospheres with incontinuous multic... 17424037 - Epidemiological associations between characteristics of registered broiler chicken floc... 22590707 - Toward biodegradable nanogel star polymers via organocatalytic rop. 9496647 - Voc concentration in taiwan's household drinking water. 15801177 - Azorhodanine derivatives as inhibitors for acidic corrosion of nickel. |
Publication Detail:
|
Type: JOURNAL ARTICLE Date: 2012-7-3 |
Journal Detail:
|
Title: Langmuir : the ACS journal of surfaces and colloids Volume: - ISSN: 1520-5827 ISO Abbreviation: - Publication Date: 2012 Jul |
Date Detail:
|
Created Date: 2012-7-4 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 9882736 Medline TA: Langmuir Country: - |
Other Details:
|
Languages: ENG Pagination: - Citation Subset: - |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Availability, utilization and outcomes of deceased diabetic donor kidneys; analysis based on the UNO...
Next Document: Total Synthesis and Structure Confirmation of Elatenyne: Success of Computational Methods for NMR Pr...