用纳安培电流加工低热导材料的低千伏聚焦离子束策略。

IF 2.6 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Beilstein Journal of Nanotechnology Pub Date : 2024-09-27 eCollection Date: 2024-01-01 DOI:10.3762/bjnano.15.97
Annalena Wolff, Nico Klingner, William Thompson, Yinghong Zhou, Jinying Lin, Yin Xiao
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引用次数: 0

摘要

在生物样品等热传导性低的试样中,离子束诱发的热损伤越来越受到科学界的关注。这部分是由于 FIB-SEM 在生物学中的应用越来越多,以及需要分析的聚合物等复杂材料的发展。本文介绍的工作研究了离子束与样品相互作用背后的物理学原理,以及入射离子能量(由加速电压设定)对样品温度升高和聚合物等低导热材料及生物样品潜在热损伤的影响。利用傅里叶传热定律、有限元模拟和数值建模结果计算了低加速电压下不同离子束电流的离子束诱导热,并与实验结果进行了比较。结果表明,在较低的加速器电压下,纳安培范围内较高的离子束电流可用于软材料和非树脂包埋生物样品的制图或成像,同时提高铣削速度并减少热损伤。
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A low-kiloelectronvolt focused ion beam strategy for processing low-thermal-conductance materials with nanoampere currents.

Ion beam-induced heat damage in thermally low conductive specimens such as biological samples is gaining increased interest within the scientific community. This is partly due to the increased use of FIB-SEMs in biology as well as the development of complex materials, such as polymers, which need to be analyzed. The work presented here looks at the physics behind the ion beam-sample interactions and the effect of the incident ion energy (set by the acceleration voltage) on inducing increases in sample temperature and potential heat damage in thermally low conductive materials such as polymers and biological samples. The ion beam-induced heat for different ion beam currents at low acceleration voltages is calculated using Fourier's law of heat transfer, finite element simulations, and numerical modelling results and compared to experiments. The results indicate that with lower accelerator voltages, higher ion beam currents in the nanoampere range can be used to pattern or image soft material and non-resin-embedded biological samples with increased milling speed but reduced heat damage.

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来源期刊
Beilstein Journal of Nanotechnology
Beilstein Journal of Nanotechnology NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY
CiteScore
5.70
自引率
3.20%
发文量
109
审稿时长
2 months
期刊介绍: The Beilstein Journal of Nanotechnology is an international, peer-reviewed, Open Access journal. It provides a unique platform for rapid publication without any charges (free for author and reader) – Platinum Open Access. The content is freely accessible 365 days a year to any user worldwide. Articles are available online immediately upon publication and are publicly archived in all major repositories. In addition, it provides a platform for publishing thematic issues (theme-based collections of articles) on topical issues in nanoscience and nanotechnology. The journal is published and completely funded by the Beilstein-Institut, a non-profit foundation located in Frankfurt am Main, Germany. The editor-in-chief is Professor Thomas Schimmel – Karlsruhe Institute of Technology. He is supported by more than 20 associate editors who are responsible for a particular subject area within the scope of the journal.
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