From helixes to mesostructures: evolution of mesoporous silica shells on single-walled carbon nanotubes

Wang, Yao, Song, Hao, Yu, Chengzhong and Gu, Hongchen (2016) From helixes to mesostructures: evolution of mesoporous silica shells on single-walled carbon nanotubes. Chemistry of Materials, 28 3: 936-942. doi:10.1021/acs.chemmater.5b04660


Author Wang, Yao
Song, Hao
Yu, Chengzhong
Gu, Hongchen
Title From helixes to mesostructures: evolution of mesoporous silica shells on single-walled carbon nanotubes
Journal name Chemistry of Materials   Check publisher's open access policy
ISSN 1520-5002
0897-4756
Publication date 2016-02-09
Sub-type Article (original research)
DOI 10.1021/acs.chemmater.5b04660
Open Access Status Not Open Access
Volume 28
Issue 3
Start page 936
End page 942
Total pages 7
Place of publication Washington, DC, United States
Publisher American Chemical Society
Collection year 2017
Language eng
Abstract Constructing a novel nanoplatform by integrating single-walled carbon nanotubes (SWCNTs) and mesoporous silica is of considerable interest due to their combined advantages. However, it is difficult to coat SWCNTs with mesoporous silica shells (MSS). Conventional mechanisms used in the formation of mesostructured materials can not be simply applied in this coating process because the diameter of SWCNTs is smaller than the size of surfactant micelles. Here we report the formation mechanism of MSS on SWCNTs (SWCNTs@MSS), which involves the structural evolution from helixes to mesostructures for the first time. The evolution process mainly includes four stages. The first stage is the transition from tight surfactant helix to loose silica–surfactant composite helix, followed by a second stage of gap filling process on the silica-uncovered surfaces. Afterward, the surfactant/silicate composite micelles further self-assemble onto nanotubes with the increase of diameter in the third stage. Finally, the silicate frameworks further condense to obtain stable mesostructures. The obtained SWCNTs@MSS with outstanding features exhibit high potential for cancer treatment and also promise future applications in other various fields.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: HERDC Pre-Audit
Australian Institute for Bioengineering and Nanotechnology Publications
 
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