The influence of PVP molecular weight in the synthesis of silver nanowires using a salt-assisted polyol method
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2023
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BRAZIL MRS MEETING, 21st
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In the last decades, the demand for new materials to be used in electronic devices has
increased. Among the materials that can be used in transparent conductive films (TCFs), are
the silver nanowires (AgNWs). This class of material, when supported in glass or PET, e.g.,
has good conductivity, thermal and mechanical properties and also high transparency. In
this work, the AgNWs were synthesized using the polyol method assisted by a salt and the
influence of molecular weight of the capping agent polyvinylpyrrolidone (PVP) in the
morphology and structure of Ag crystals was investigated. Different molecular weight of
PVP (40 K, 120 K, 360 K and 1300 K MW) was used in the synthesis. The surface
morphology of the products was observed by scanning electron microscopy and atomic force
microscopy. The phase composition and structure were analyzed by X-ray diffraction (XRD)
and the XRD patterns diffraction peaks correspond with the face-centered-cubic (fcc)
crystalline phase of silver. Transmission electron microscopy was used to analyze the crystal
structure, and UV-visible spectroscopy was used to follow the formation of Ag structures.
The results indicate that PVP and its chain length have an important role in the formation of
silver nanocrystals due to the adsorption and steric effects [1] and as high is the molecular
weight of PVP, longer and thinner are the AgNWs as observed by other authors [2].
Different morphologies were obtained when changing the size of PVP chain. For smaller
MW of PVP, particles and short wires were formed. Increasing the MW, nanorods and
pyramidal particles were formed, and finally, forming nanowires when using the highest
MW PVP of the experiments.Improving the aspect ratio of silver nanowires is important to
construct TCFs, since the conductivity and transparency properties are improved when they
are thinner and longer.
Como referenciar
SILVA, BARBARA P.G.; OTUBO, LARISSA. The influence of PVP molecular weight in the synthesis of silver nanowires using a salt-assisted polyol method. In: BRAZIL MRS MEETING, 21st, October 1-5, 2023, Maceió, AL. Abstract... São Carlos, SP: Aptor Software, 2023. p. 877-877. Disponível em: http://repositorio.ipen.br/handle/123456789/34561. Acesso em: 01 Mar 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.