Journal article
Large- and small-nanopore silica prepared with a short-chain cationic fluorinated surfactant
Nanotechnology, Vol.16(7), pp.S502-S507
07/2005
DOI: 10.1088/0957-4484/16/7/026
PMID: 21727471
Abstract
A cationic partially fluorinated surfactant with four carbons in the chain 1-(3,3,4,4,4-pentafluorobutyl)pyridinium chloride is employed as a structure-directing agent to synthesize nanoporous silica. Samples are prepared in dilute ammonia solutions at room temperature with a range of surfactant:Si ratios. The sample with the largest surfactant:Si ratio forms particles with wormhole-like micropores with an average diameter of 1.6 nm, which corresponds to the anticipated small size of the surfactant aggregates. On the other hand, the sample with the smallest surfactant:Si ratio forms a gel that, upon drying, has uniform 11.1 nm pores. The formation and stabilization of the latter large-mesopore structure is unusual for a sample prepared and dried under ambient conditions, and may reflect favourable roles of the surfactant both in inducing gelation and in stabilizing the pore structure during drying.
Details
- Title: Subtitle
- Large- and small-nanopore silica prepared with a short-chain cationic fluorinated surfactant
- Creators
- Bing Tan - Chemical and Materials Engineering Department, University of Kentucky, 177 Anderson Hall, Lexington, KY 40506-0046, USAHans-Joachim LehmlerSandhya M VyasBarbara L KnutsonStephen E Rankin
- Resource Type
- Journal article
- Publication Details
- Nanotechnology, Vol.16(7), pp.S502-S507
- DOI
- 10.1088/0957-4484/16/7/026
- PMID
- 21727471
- NLM abbreviation
- Nanotechnology
- ISSN
- 0957-4484
- eISSN
- 1361-6528
- Publisher
- England
- Language
- English
- Date published
- 07/2005
- Academic Unit
- Occupational and Environmental Health; Iowa Neuroscience Institute
- Record Identifier
- 9984001156102771
Metrics
10 Record Views