کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1646351 1517299 2012 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Preparation of helical titania nanotubes using a sol–gel transcription approach
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
Preparation of helical titania nanotubes using a sol–gel transcription approach
چکیده انگلیسی

Titania nanoparticles have attracted much attention for their application in catalysis. Over the last few decades, studies have shown that their morphology can be carefully controlled. However, reports on the preparation of helical titania nanotubes are rare. Here, a pair of valine-derived chiral cationic gelators were synthesized, which could self-assemble into helical nanofibers in ethanol and isopropanol. Single-handed helical titania nanotubes were prepared using a sol–gel transcription approach, using the self-assembly of the gelators as a template. The results indicated that the handedness of the titania nanotubes was controlled by that of the organic self-assembled structures. Transmission electron microscopy images indicated that the nanotubes were constructed from nanocrystals. Wide-angle X-ray diffraction patterns indicated that the nanocrystals were anatase. Because the space group of anatase phases is chiral, the titania nanotubes have the potential to be used as asymmetric catalysts, and chirality sensors.

Figure optionsDownload as PowerPoint slideHighlights
► Helical titania nanotubes were prepared through a sol–gel transcription approach.
► The titania nanotubes were constructed by antase nanoparticles.
► The handedness of the nanotubes follows that of the organic self-assemblies.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Letters - Volume 88, 1 December 2012, Pages 23–26
نویسندگان
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