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Synthesis of chiral...
Synthesis of chiral TiO2 nanofibre with electron transition-based optical activity
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Liu, Shaohua (author)
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Lu, Han (author)
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Duan, Yingying (author)
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Asahina, Shunsuke (author)
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- Terasaki, Osamu, 1943- (author)
- Stockholms universitet,Institutionen för material- och miljökemi (MMK)
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Cao, Yuanyuan (author)
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Liu, Ben (author)
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Ma, Liguo (author)
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Zhang, Jialiang Zhang (author)
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Che, Shunai (author)
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(creator_code:org_t)
- 2012-11-20
- 2012
- English.
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In: Nature Communications. - : Springer Science and Business Media LLC. - 2041-1723. ; 3, s. 1215-
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https://doi.org/10.1...
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https://www.nature.c...
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https://urn.kb.se/re...
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Abstract
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- The optical chirality induced at the absorption bands due to electronic exciton coupling of the transition dipole moments between chromophores in close proximity is ubiquitous in helical organic materials. However, inorganic materials with optical activity resulting from electronic transitions have not been explored. Here we report the synthesis of chiral TiO2 fibres via transcription of the helical structure of amino acid-derived amphiphile fibres through coordination bonding interactions between the organics and the TiO2 source. Upon calcination, the as-prepared amorphous TiO2 double-helical fibres with a pitch length of ~100 nm were converted to double-helical crystalline fibres with stacks of anatase nanocrystals in an epitaxial helical relationship. Both the amorphous and anatase crystalline helical TiO2 fibres exhibited optical response to circularly polarized light at the absorption edge around ~350 nm. This was attributed to the semiconductor TiO2-based electronic transitions from the valence band to the conduction band under an asymmetric electric field.
Subject headings
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
Keyword
- nanofibre with electron
- Materials Chemistry
- materialkemi
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Liu, Shaohua
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Lu, Han
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Duan, Yingying
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Asahina, Shunsuk ...
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Terasaki, Osamu, ...
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Cao, Yuanyuan
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show more...
-
Liu, Ben
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Ma, Liguo
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Zhang, Jialiang ...
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Che, Shunai
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Chemical Science ...
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and Materials Chemis ...
- Articles in the publication
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Nature Communica ...
- By the university
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Stockholm University