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Production of polar β-Glycine nanofibers with enhanced nonlinear optical and piezoelectric properties

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Detalhes bibliográficos
Resumo:Electrospinning of an aqueous poly(vinyl alcohol) and glycine solution has been used to produce nanofibers with an embedded crystalline glycine exclusively in the form of the β polymorph. The β-glycine nanocrystals are highly oriented within the polymer fibers and present good polar properties. Piezoelectric and nonlinear optical responses have been quantitatively examined showing piezoelectric coefficient deff = 12.5 pm/V and an effective nonlinear optical susceptibility two times greater than that of potassium dihydrogen phosphate (KDP). Additionally, although bulk β-glycine is metastable at room temperature, when confined inside the polymeric nanofibers, it is shown to be remarkably stable.
Autores principais:Isakov, D. V.
Outros Autores:Gomes, E. Matos; Bdikin, Igor; Almeida, B. G.; Belsley, M.; Costa, Margarida; Rodrigues, Vitor; Heredia, Alejandro
Assunto:Nano fibers Second harmonic
Ano:2011
País:Portugal
Tipo de documento:artigo
Tipo de acesso:acesso restrito
Instituição associada:Universidade do Minho
Idioma:inglês
Origem:RepositóriUM - Universidade do Minho
Descrição
Resumo:Electrospinning of an aqueous poly(vinyl alcohol) and glycine solution has been used to produce nanofibers with an embedded crystalline glycine exclusively in the form of the β polymorph. The β-glycine nanocrystals are highly oriented within the polymer fibers and present good polar properties. Piezoelectric and nonlinear optical responses have been quantitatively examined showing piezoelectric coefficient deff = 12.5 pm/V and an effective nonlinear optical susceptibility two times greater than that of potassium dihydrogen phosphate (KDP). Additionally, although bulk β-glycine is metastable at room temperature, when confined inside the polymeric nanofibers, it is shown to be remarkably stable.