Fabrication and characterization of poly(fullerene) thin films for gas sensors

IF 2.9 4区 化学 Q2 POLYMER SCIENCE
André VS Simõis, Marcelo S Borro, Maria ERS Medina, Luiz A Riga Jr, Nyara D Ferreira, Pedro L Silva, Hasina H Ramanitra, Meera Stephen, Nara C Souza, Roger C Hiorns, Deuber LS Agostini, Clarissa A Olivati
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引用次数: 0

Abstract

Ammonia, despite being a naturally generated compound in the metabolic process, can be harmful to health in higher concentrations. In this context, sensor devices are directly related to health and safety measurements to detect the presence of such substances. In this work, we study materials derived from fullerene, a material with a high electron affinity. We characterize three fullerene derivatives, namely PCBM, OPCBMMB and PPCBMB, and verify their applicability as ammonia sensors. The materials were studied in the form of thin films, produced by Langmuir–Schaefer and drop-casting techniques. Optical characterization was performed using UV–visible spectroscopy while morphological characteristics were studied using atomic force microscopy (AFM) and optical microscopy (OM). Current versus voltage and current versus time measurements were performed in order to determine the films' conductivities, electrical resistances and gas-sensing properties. UV–visible absorption was observed at lower wavelengths, with peaks in the UV region. In the electrical measurements, differences were observed between the deposition techniques, with the Langmuir–Schaefer films showing a higher conductivity than the drop-casting films. AFM and OM also showed differences in the film surfaces between the techniques, with a rougher surface on the drop-casting films. When exposed to ammonia, the materials showed electrical responses at every cycle, with a significant increase in their electrical responses. © 2024 Society of Chemical Industry.

气体传感器用聚富勒烯薄膜的制备与表征
尽管氨是代谢过程中自然产生的化合物,但浓度较高时可能对健康有害。在这种情况下,传感器装置与检测此类物质存在的健康和安全措施直接相关。在这项工作中,我们研究了由富勒烯衍生的材料,富勒烯是一种具有高电子亲和力的材料。我们表征了三种富勒烯衍生物,即PCBM, OPCBMMB和PPCBMB,并验证了它们作为氨传感器的适用性。这些材料以薄膜的形式进行了研究,采用Langmuir-Schaefer和滴铸技术生产。利用紫外可见光谱进行光学表征,利用原子力显微镜(AFM)和光学显微镜(OM)研究形貌特征。为了确定薄膜的电导率、电阻和气敏性能,进行了电流与电压和电流与时间的测量。在较低波长处观察到紫外可见吸收,在紫外区有峰。在电学测量中,观察到沉积技术之间的差异,Langmuir-Schaefer薄膜的电导率高于滴铸膜。AFM和OM在膜表面上也表现出不同的技术,滴铸膜表面更粗糙。当暴露于氨中时,材料在每个循环中都表现出电反应,并且电反应显著增加。©2024化学工业学会。
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
Polymer International
Polymer International 化学-高分子科学
CiteScore
7.10
自引率
3.10%
发文量
135
审稿时长
4.3 months
期刊介绍: Polymer International (PI) publishes the most significant advances in macromolecular science and technology. PI especially welcomes research papers that address applications that fall within the broad headings Energy and Electronics, Biomedical Studies, and Water, Environment and Sustainability. The Journal’s editors have identified these as the major challenges facing polymer scientists worldwide. The Journal also publishes invited Review, Mini-review and Perspective papers that address these challenges and others that may be of growing or future relevance to polymer scientists and engineers.
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