Uptake of Magnetite Nanoparticles on Polydopamine Films Deposited on Gold Surfaces: A Study by AFM and XPS.

IF 4.4 3区材料科学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Nanomaterials Pub Date : 2024-10-24 DOI:10.3390/nano14211699

Andrea Atrei, Shalva Chokheli, Maddalena Corsini, Tóth József, Giuseppe Di Florio

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引用次数: 0

Abstract

Polydopamine has the capacity to adhere to a large variety of materials and this property offers the possibility to bind nanoparticles to solid surfaces. In this work, magnetite nanoparticles were deposited on gold substrates coated with polydopamine films. The aim of this work was to investigate the effects of the composition and morphology of the PDA layers on the sticking of magnetite nanoparticles. The polydopamine coating of gold surfaces was achieved by the oxidation of alkaline solutions of dopamine with various reaction times. The length of the reaction time to form PDA was expected to influence the composition and surface roughness of the PDA films. Magnetite nanoparticles were deposited on these polydopamine films by immersing the samples in aqueous dispersions of nanoparticles. The morphology at the nanometric scale and the composition of the surfaces before and after the deposition of magnetite nanoparticles were investigated by means of AFM and XPS. We found that the amount of magnetite nanoparticles on the surface did not vary monotonically with the reaction time of PDA formation, but it was at the minimum after 20 min of reaction. This behavior may be attributed to changes in the chemical composition of the coating layer with reaction time.

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沉积在金表面的聚多巴胺薄膜对磁铁矿纳米颗粒的吸收：原子力显微镜和 XPS 研究。

聚多巴胺能够附着在多种材料上，这一特性为将纳米颗粒与固体表面结合提供了可能。在这项研究中，磁铁矿纳米粒子沉积在涂有聚多巴胺薄膜的金基底上。这项工作的目的是研究聚多巴胺层的成分和形态对磁铁矿纳米颗粒粘附的影响。金表面的多巴胺涂层是通过不同反应时间的碱性多巴胺溶液氧化实现的。形成多巴胺的反应时间长短预计会影响多巴胺薄膜的成分和表面粗糙度。通过将样品浸入纳米颗粒的水分散液中，磁铁矿纳米颗粒沉积在这些聚多巴胺薄膜上。通过原子力显微镜（AFM）和 XPS 研究了纳米尺度的形态以及磁铁矿纳米颗粒沉积前后的表面成分。我们发现，表面上的磁铁矿纳米颗粒数量并不随 PDA 形成的反应时间单调变化，而是在反应 20 分钟后达到最小值。这种行为可能是由于镀膜层的化学成分随反应时间的变化而变化。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nanomaterials NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

8.50

自引率

9.40%

发文量

3841

审稿时长

14.22 days

期刊介绍： Nanomaterials (ISSN 2076-4991) is an international and interdisciplinary scholarly open access journal. It publishes reviews, regular research papers, communications, and short notes that are relevant to any field of study that involves nanomaterials, with respect to their science and application. Thus, theoretical and experimental articles will be accepted, along with articles that deal with the synthesis and use of nanomaterials. Articles that synthesize information from multiple fields, and which place discoveries within a broader context, will be preferred. There is no restriction on the length of the papers. Our aim is to encourage scientists to publish their experimental and theoretical research in as much detail as possible. Full experimental or methodical details, or both, must be provided for research articles. Computed data or files regarding the full details of the experimental procedure, if unable to be published in a normal way, can be deposited as supplementary material. Nanomaterials is dedicated to a high scientific standard. All manuscripts undergo a rigorous reviewing process and decisions are based on the recommendations of independent reviewers.