Journal
LANGMUIR
Volume 34, Issue 13, Pages 3901-3908Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.langmuir.7b03536
Keywords
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Funding
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Korean government (MEST) [2010-0027955, NRF2017R1A2B2008019]
- National Research Foundation of Korea [2017R1A5A1070259, 2017R1A2B2008019] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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The new class of silica nanoparticles with unprecedented structural morphology is synthesized by hydrolysis of tetraethyl orthosilicate (TEOS) in the presence of cetyltrimethylammonium bromide (CTAB), L-arginine, and ammonium metatungstate (AMT) composite template, all in aqueous ethanol. The morphology of the synthesized mesoporous silica nanoparticles (MSNs) can be tuned from a spherical to a hollow doughnut shape through a hollow sphere by controlling the concentration of AMT in the composite template. The formation mechanism of the hollow doughnut shaped MSNs (hd-MSNs) is well-explored by means of zeta potential, high-resolution transmission electron microscopy (HRTEM) with elemental mapping analysis, and Xray photoelectron spectroscopy. The unique structure of the hd-MSNs as well as their high thermal and mechanical stability is expected to result in their application in shape-selective catalysis, drug delivery, and sensors.
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