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Access to lanthanoid telluride nanoparticles: Liquid exfoliation of LnTe3 (Ln?=?La, Ho)
閱讀：258 發(fā)布時間：2018-6-19| 提 供 商 | 美國布魯克海文儀器公司 | 資料大小 | 872.7KB |
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作者： T.A.Pomelovaa, V.K.Muravevaa, T.Yu.Podlipskayaa, S.E.Khandarkhaevab, N.A.Nebogatikovac, I.V.Yushinaa, E.Ya.Gatapovab,e, S.Cordierd, N.G.Naumovab
a Nikolaev Institute of Inorganic Chemistry SB RAS, 3, Acad. Lavrentiev Ave., 630090 Novosibirsk, Russian Federation
b Novosibirsk State University, 2, Pirogova Str., 630090 Novosibirsk, Russian Federation
c Rzhanov Institute of Semiconductor Physics SB RAS, 13, Acad. Lavrentiev Ave., 630090 Novosibirsk, Russian Federation
d Université de Rennes 1, Inst Sci Chim Rennes, UMR 6226, CNRS UR1, Campus Beaulieu, F-35042 Rennes, France
e Kutaadze Institute of Thermophysics SB RAS, 1 Acad. Lavrentiev Ave., 630090 Novosibirsk, Russian Federation
摘要：Although many of the nanoparticles containing lanthanoids are deeply investigated, the reports concerning chalcogenide materials are scarce. Comprehensive exploration of properties of these materials requires a proper preparation method avoiding hydrolysis and contamination with oxygen-containing products. Hence, in this case, the top-down approach could be preferable. In this study we demonstrated preparation of LnTe3 (Ln?=?La, Ho) nanoparticles by liquid exfoliation method. Bulk trilurides LaTe3 and HoTe3 afford stable dispersions in a number of common organic solvents under ultrasonic treatment. The size and morphology of nanoparticles in colloid solutions as well as films prepared from them were investigated by a number of methods (AFM, TEM, DLS, XRD, Raman). LnTe3 form stable dispersions in alcoholic media with concentration up to 165?mg/L. In these dispersions nanoparticles exist as 1–2 layered charged flakes with lateral size 50–80?nm. The nanoparticles can be reassembled as films, which demonstrated orientation along 0 k 0 direction.