Hierarchic nanostructure for auto-modulation of material release: mesoporous nanocompartment films

Ji, Qingmin, Acharya, Somobrata, Hill, Jonathan P., Vinu, Ajayan, Yoon, Suk Bon, Yu, Jong-Sung, Sakamoto, Kazutami and Ariga, Katsuhiko (2009) Hierarchic nanostructure for auto-modulation of material release: mesoporous nanocompartment films. Advanced Functional Materials, 19 11: 1792-1799. doi:10.1002/adfm.200801762

Author Ji, Qingmin
Acharya, Somobrata
Hill, Jonathan P.
Vinu, Ajayan
Yoon, Suk Bon
Yu, Jong-Sung
Sakamoto, Kazutami
Ariga, Katsuhiko
Title Hierarchic nanostructure for auto-modulation of material release: mesoporous nanocompartment films
Journal name Advanced Functional Materials   Check publisher's open access policy
ISSN 1616-301X
Publication date 2009-06
Sub-type Article (original research)
DOI 10.1002/adfm.200801762
Volume 19
Issue 11
Start page 1792
End page 1799
Total pages 8
Place of publication Weinheim, Germany
Publisher Wiley
Language eng
Abstract The preparation of mesoporous nanocompartment films composed of both hollow silica capsules and silica particles by using layer-by-layer (LbL) adsorption is described. The resultant nanocompartment films exhibit stepwise release of encapsulated water molecules without application of external stimuli. The hollow hierarchic pore structure of the silica capsules, including their internal void and mesoporous walls, is a key factor for theregulation and stepwise release of water, and is probably caused by the nonequilibrated oncurrent evaporation of material from the mesopore and capillary penetration into the mesopores. The number of release steps and rate of release can be tuned by variation of several parameters including water content, ambient temperature, layer multiplicity, and co-adduct particle size. Application of the mesoporous nanocompartment films for the release of substances, including therapeutic agents and fragrances, indicates that the stepwise material release can be applied for a wide range of liquid substances. The films should lead to a novel material release system useful even for biomedical applications capable of controlled and sustained delivery of drug molecules.
Keyword Mesoporous nanocompartment films
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Australian Institute for Bioengineering and Nanotechnology Publications
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