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IRC-SET 2018 pp 309-319 | Cite as

Building Nanostructured Porous Silica Materials Directed by Surfactants

  • Wayne W. Z. Yeo
  • Su Hui Lim
  • Connie K. LiuEmail author
  • Gen YongEmail author
Conference paper

Abstract

Silica nanomaterials have found prevailing use in biomedical applications due to their biocompatibility and non-toxicity. The use of a structure-directing agent in silica sol-gel synthesis enables us to direct the formation of silica nanostructures into forms that are otherwise difficult to obtain, allowing the exertion of a fine degree of control over the morphology, dimensions and architecture of the nanostructures. Single-tailed surfactants have been used extensively as soft templates to produce mesoporous silica materials. This study investigates the use of a double-tailed surfactant, a didodecyldimethylammonium phosphate surfactant (DDAH2PO4) as a structure-directing agent in the sol-gel synthesis of silica at ambient conditions in aqueous solution. The effects of varying reaction parameters such as surfactant concentration and solution temperature on resulting silica morphology are presented. Morphological transitions from nanobeads to hexagonal plates and toroidal concave particles are observed with increasing surfactant concentrations, as well as a gradual loss in templating ability at elevated solution temperatures (up to 25 °C). This allows us to access different morphologies and dimensions of nanostructures within the same synthesis scheme templated with DDAH2PO4.

Notes

Acknowledgements

We acknowledge the Institute of Materials Research and Engineering, A*STAR for providing the resources to conduct this study and Ms. Zhang Nan for collecting the titration data used in Fig. 2. W.W.Z. Yeo is grateful to Victoria Junior College and Mr. Wong Shiongwei for advice, support and guidance.

Supplementary material

471308_1_En_25_MOESM1_ESM.pdf (1.1 mb)
Supplementary material 1 (PDF 1151 kb)

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Copyright information

© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  1. 1.Victoria Junior CollegeSingaporeSingapore
  2. 2.Institute of Materials Research and Engineering, Agency for Science, Technology and ResearchSingaporeSingapore
  3. 3.Cancer Early Detection Advanced Research Center, Knight Cancer Institute, Oregon Health & Science UniversityPortlandUSA

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