| ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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Effects of the buffer layer on the Casimir pressure of peptide films deposited on a substrate |
| Dingding Lv(吕丁丁)1, Shuai Zhou(周帅)1,3, Kaipeng Liu(柳开鹏)1, Shiwei Dai(戴士为)2, and Lixin Ge(葛力新)1,† |
1 School of Physics and Electronic Engineering, Xinyang Normal University, Xinyang 464000, China;
2 College of Mathematics and Physics, Chengdu University of Technology, Chengdu 610059, China;
3 Department of Basic Courses, Zhengzhou University of Science and Technology, Zhengzhou 450064, China |
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Abstract The Casimir pressure plays an important role in the adhesion stability of nanofilms at submicro scales. In this work, the Casimir pressure of peptide films deposited on a layered substrate is investigated. Three types of semi-infinite substrates, i.e., silica, silicon and gold, are considered. The buffer layer between the peptide film and substrate consists of silicon or silica. The switching sign of the Casimir pressure can be controlled in a region ranging from about 130 nm to 1000 nm, depending on the thickness of the buffer layer and the substrate. The results suggest that the critical thickness of peptide films for Casimir equilibrium increases (or decreases) by increasing the thickness of the silicon (or silica) buffer film. The influences of wetting and electrolyte screening on the Casimir pressure are also investigated. Our finding provides a theoretical guide for the adhesion stability of peptide films in organic electronics.
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Received: 30 March 2025
Revised: 14 May 2025
Accepted manuscript online: 29 May 2025
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PACS:
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42.50.Lc
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(Quantum fluctuations, quantum noise, and quantum jumps)
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87.14.ef
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(Peptides)
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61.20.Qg
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(Structure of associated liquids: electrolytes, molten salts, etc.)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 11804288) and the Natural Science Foundation of Henan (Grant No. 232300420120). |
Corresponding Authors:
Lixin Ge
E-mail: lixinge@hotmail.com
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Cite this article:
Dingding Lv(吕丁丁), Shuai Zhou(周帅), Kaipeng Liu(柳开鹏), Shiwei Dai(戴士为), and Lixin Ge(葛力新) Effects of the buffer layer on the Casimir pressure of peptide films deposited on a substrate 2025 Chin. Phys. B 34 104202
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