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Article: Hierarchical porous materials made by drying complex suspensions

TitleHierarchical porous materials made by drying complex suspensions
Authors
Issue Date2011
PublisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/langmuir
Citation
Langmuir, 2011, v. 27 n. 3, p. 955-964 How to Cite?
AbstractPorous structures containing pores at different length scales are often encountered in nature and are important in many applications. While several processing routes have been demonstrated to create such hierarchical porous materials, most methods either require chemical gelation reactions or do not allow for the desired control of pore sizes over multiple length scales. We describe a versatile and simple approach to produce tailor-made hierarchical porous materials that relies solely on the process of drying. Our results show that simple drying of a complex suspension can lead to the self-assembly of droplets, colloidal particles and molecular species into unique 3D hierarchical porous structures. Using a microfluidic device to produce monodisperse templating droplets of tunable size, we prepared materials with up to three levels of hierarchy exhibiting monodisperse pores ranging from 10 nm to 800 μm. While the size of macropores obtained after drying is determined by the size of initial droplets, the interconnectivity between macropores is strongly affected by the type of droplet stabilizer (surfactants or particles). This simple route can be used to prepare porous materials of many chemical compositions and has great potential for creating artificial porous structures that capture some of the exquisite hierarchical features of porous biological materials. © 2010 American Chemical Society.
Persistent Identifierhttp://hdl.handle.net/10722/139370
ISSN
2015 Impact Factor: 3.993
2015 SCImago Journal Rankings: 1.750
ISI Accession Number ID
Funding AgencyGrant Number
Swiss National Science FoundationPBSK2-116386/1
NSFDMR-0602684
Harvard MRSECDMR-0820484
Funding Information:

We thank Dr. Thomas R. Dietrich (Mikroglas Chemtech GmbH, Mainz, Germany) for kindly supplying the structured glass substrates. A.R.S. thanks the Swiss National Science Foundation for the financial support (Grant PBSK2-116386/1). The work at Harvard University was supported by the NSF (DMR-0602684) and the Harvard MRSEC (DMR-0820484).

References

 

DC FieldValueLanguage
dc.contributor.authorStudart, ARen_HK
dc.contributor.authorStuder, Jen_HK
dc.contributor.authorXu, Len_HK
dc.contributor.authorYoon, Ken_HK
dc.contributor.authorShum, HCen_HK
dc.contributor.authorWeitz, DAen_HK
dc.date.accessioned2011-09-23T05:48:56Z-
dc.date.available2011-09-23T05:48:56Z-
dc.date.issued2011en_HK
dc.identifier.citationLangmuir, 2011, v. 27 n. 3, p. 955-964en_HK
dc.identifier.issn0743-7463en_HK
dc.identifier.urihttp://hdl.handle.net/10722/139370-
dc.description.abstractPorous structures containing pores at different length scales are often encountered in nature and are important in many applications. While several processing routes have been demonstrated to create such hierarchical porous materials, most methods either require chemical gelation reactions or do not allow for the desired control of pore sizes over multiple length scales. We describe a versatile and simple approach to produce tailor-made hierarchical porous materials that relies solely on the process of drying. Our results show that simple drying of a complex suspension can lead to the self-assembly of droplets, colloidal particles and molecular species into unique 3D hierarchical porous structures. Using a microfluidic device to produce monodisperse templating droplets of tunable size, we prepared materials with up to three levels of hierarchy exhibiting monodisperse pores ranging from 10 nm to 800 μm. While the size of macropores obtained after drying is determined by the size of initial droplets, the interconnectivity between macropores is strongly affected by the type of droplet stabilizer (surfactants or particles). This simple route can be used to prepare porous materials of many chemical compositions and has great potential for creating artificial porous structures that capture some of the exquisite hierarchical features of porous biological materials. © 2010 American Chemical Society.en_HK
dc.languageengen_US
dc.publisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/langmuiren_HK
dc.relation.ispartofLangmuiren_HK
dc.subject.meshDesiccation - methods-
dc.subject.meshMicroscopy, Electron, Scanning-
dc.subject.meshNanostructures - chemistry - ultrastructure-
dc.subject.meshNanotechnology-
dc.subject.meshSuspensions - chemistry-
dc.titleHierarchical porous materials made by drying complex suspensionsen_HK
dc.typeArticleen_HK
dc.identifier.emailShum, HC:ashum@hku.hken_HK
dc.identifier.authorityShum, HC=rp01439en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1021/la103995gen_HK
dc.identifier.pmid21192693-
dc.identifier.scopuseid_2-s2.0-79952743259en_HK
dc.identifier.hkuros193597en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-79952743259&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume27en_HK
dc.identifier.issue3en_HK
dc.identifier.spage955en_HK
dc.identifier.epage964en_HK
dc.identifier.isiWOS:000286485600016-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridStudart, AR=6603886275en_HK
dc.identifier.scopusauthoridStuder, J=37762200500en_HK
dc.identifier.scopusauthoridXu, L=35789435800en_HK
dc.identifier.scopusauthoridYoon, K=24330443400en_HK
dc.identifier.scopusauthoridShum, HC=23976513800en_HK
dc.identifier.scopusauthoridWeitz, DA=7006798731en_HK

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