Helical Mesoporous Tantalum Oxide Nanotubes: Formation, Optical Activity, and Applications.

Title Helical Mesoporous Tantalum Oxide Nanotubes: Formation, Optical Activity, and Applications.
Authors Y. He; Y. Yang
Journal Chem Rec
DOI 10.1002/tcr.201700012

Nanomaterials with helical morphologies have attracted much attention owing to their potential applications as nanosprings, chirality sensors and in chiral optics. Single-handed helical Ta2 O5 nanotubes prepared through a supramolecular templating approach are described. The handedness is controlled by that of the organic self-assemblies of chiral low-molecular-weight gelators (LMWGs). The chiral LMWGs self-assemble into single-handed twisted nanoribbons through H-bonding, hydrophobic association, and ?-? stacking. The Ta2 O5 nanotubes are formed by the adsorption and polycondensation of Ta2 O5 oligomers on the surfaces and edges of the twisted organic nanoribbons followed by removal of the template. The optical activity of the nanotubes is proposed to originate from the chiral defects on the inner surfaces of the tubular structures. Single-handed twisted LiTaO3 nanotubes can also be prepared using Ta2 O5 nanotubes.

Citation Y. He; Y. Yang.Helical Mesoporous Tantalum Oxide Nanotubes: Formation, Optical Activity, and Applications.. Chem Rec. 2017. doi:10.1002/tcr.201700012

Related Elements


See more Tantalum products. Tantalum (atomic symbol: Ta, atomic number: 73) is a Block D, Group 5, Period 6 element with an atomic weight of 180.94788. Tantalum Bohr ModelThe number of electrons in each of tantalum's shells is [2, 8, 18, 32, 11, 2] and its electron configuration is [Xe] 4f14 5d3 6s2. The tantalum atom has a radius of 146 pm and a Van der Waals radius of 217 pm. High Purity (99.999%) Tantalum (Ta) MetalTantalum was first discovered by Anders G. Ekeberg in 1802 in Uppsala, Sweden however, it was not until 1844 when Heinrich Rose first recognized it as a distinct element. In its elemental form, tantalum has a grayish blue appearance. Tantalum is found in the minerals tantalite, microlite, wodginite, euxenite, and polycrase. Due to the close relation of tantalum to niobium in the periodic table, Tantalum's name originates from the Greek word Tantalos meaning Father of Niobe in Greek mythology.

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