The influence of halide ions in the silver nanowires synthesis using polyol method
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2024
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BRAZIL MRS MEETING, 22nd
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Silver nanowires (AgNWs) have been studied due to their great optical and electrical
properties, making them potential materials to be applied in transparent conductive films
(TCFs). Halide ions, such as chloride (Cl-) and bromide (Br-), have been investigated in the
synthesis of AgNWs by many researchers.¹ Cl- are commonly used to control the AgNWs
growth by facilitating AgCl formation and controlling Ag+ in the solution thereby inhibiting
the growth of silver particles (AgNP). Similarly, Br- are also being investigated as a capping
agent due to their ability to adsorb onto the (100) crystal plane of Ag, analogous to the
capping agent polyvinylpyrrolidone (PVP). In this study, we investigate the influence of Brand
Cl- ions in the synthesis of AgNWs using the polyol method, employing ethylene glycol
(EG) as solvent and reducing agent, silver nitrate (AgNO3) as the metallic precursor and
PVP as the capping agent. In the absence of halide salts, pyramids and rod structures were
observed. When only Cl- is added in the reaction, a mixture of pyramids rods and wires were
formed. The addition of Br-resulted in the formation of particles (d=133,7 ± 1,6 nm)
attributed to the adsorption of Br- ions on the {100}, {110} and {111} crystal planes of fcc
silver. The Uv-vis spectrum of sample with Br- exhibited a band at 430 nm, consistent with
literature reports for AgNP. The spectra obtained for samples without halides and sample
with Cl- are consistent with larger structures. However, when both halides are introduced in
the reaction, longer and thinner AgNWs were produced,as observed through SEM, AFM and
UV-vis, stating their important role in the silver nanowires growth. Enhancing our
comprehension on the growth process and morphological control is important for optimizing
the technological application of AgNWs, especially for TCFs.
Como referenciar
SILVA, BARBARA P.G.; SILVA, CRYSTIAN W.C. da; OTUBO, LARISSA. The influence of halide ions in the silver nanowires synthesis using polyol method. In: BRAZIL MRS MEETING, 22nd, September 29 - October 3, 2024, Santos, SP. Abstract... São Carlos, SP: Aptor Software, 2024. p. 1187-1187. Disponível em: https://repositorio.ipen.br/handle/123456789/48937. Acesso em: 28 Feb 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.