Facile synthesis of tellurium nanowires and study of their third-order nonlinear optical properties
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2017
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We report on the synthesis of single-crystalline tellurium nanowires with different aspectratios
prepared via facile surfactant-assisted synthesis under mild conditions. Short and long
Te nanowires were synthesized by the reduction of tellurium dioxide by hypophosphorous acid
with the assistance of polyoxyethylene (23) laurylether and cetyltrimethylammonium bromide,
respectively. We obtained uniform single-crystal Te nanowires with diameter below 30 nm and
tunable length from 600 nm to 5 μm. Short and long Te nanowires showed remarkable nonlinear
absorption and their third-order nonlinear optical properties were investigated by the Z-scan
technique with single 80 ps laser pulses at 532 nm. For the first time, it was observed a distinguished
switching behavior from saturated absorption to reverse saturated absorption as a function of the
laser intensity in one-dimensional Te nanostructures. Although both short and long Te nanowires
display such interesting behavior, the short ones exhibited superior optical limiting performance.
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Tellurium, Z-scan, Nanowire, Nonlinear optical absorption
Citação
SILVA, Robson R. et al. Facile synthesis of tellurium nanowires and study of their third-order nonlinear optical properties. Journal of the Brazilian Chemical Society, Campinas, v. 28, n. 1, p. 58-67, 2017. DOI: 10.5935/0103-5053.20160145. Disponível em: https://www.scielo.br/j/jbchs/a/kchCF4KrXkShtcQY8z7DLnF/?lang=en. Acesso em: 28 abr. 2023.