Desorption Dynamics of Polymer Adsorbed Layers.

IF 5.1 Q1 POLYMER SCIENCE

ACS Macro Letters Pub Date : 2025-07-24 DOI:10.1021/acsmacrolett.5c00333

Hailin Yuan,Haron Nie,Zongyi Ma,Lu-Tao Weng,Ophelia K C Tsui

引用次数: 0

Abstract

We report on the desorption process of polystyrene (PS) from its host, an adsorbed layer on oxide-covered silicon, at a moderate temperature of 120 °C. Measurements were conducted on deuterated polystyrene (d-PS) adsorbed on SiO2 beneath layers of hydrogenated PS of varying thicknesses (htop). To assess the desorption dynamics, we measured the width of the broadening d-PS profile (σz) and the concentration of d-PS on the sample surface after 20 days of annealing. We found clear evidence that desorption occurs at 120 °C and is enhanced when the thickness of the upper PS layer decreases below ∼45 nm. A model based on surface-enhanced chain desorption accurately describes our data.

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聚合物吸附层的解吸动力学。

本文报道了聚苯乙烯（PS）在120°C的中等温度下从其宿主（一层被氧化物覆盖的硅上的吸附层）中脱附的过程。在不同厚度的氢化聚苯乙烯层（htop）下，对吸附在SiO2上的氘化聚苯乙烯（d-PS）进行了测量。为了评估解吸动力学，我们测量了退火20天后样品表面的d-PS谱宽（σz）和d-PS浓度。我们发现明确的证据表明，解吸发生在120°C，当上层PS层的厚度减小到~ 45 nm以下时，解吸得到增强。基于表面增强链解吸的模型准确地描述了我们的数据。

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

ACS Macro Letters 化学-

CiteScore

10.40

自引率

3.40%

发文量

209

审稿时长

1 months

期刊介绍： ACS Macro Letters publishes research in all areas of contemporary soft matter science in which macromolecules play a key role, including nanotechnology, self-assembly, supramolecular chemistry, biomaterials, energy generation and storage, and renewable/sustainable materials. Submissions to ACS Macro Letters should justify clearly the rapid disclosure of the key elements of the study. The scope of the journal includes high-impact research of broad interest in all areas of polymer science and engineering, including cross-disciplinary research that interfaces with polymer science. With the launch of ACS Macro Letters, all Communications that were formerly published in Macromolecules and Biomacromolecules will be published as Letters in ACS Macro Letters.