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Van der Waals forces can play unexpected role in thin film properties

Phys · · 544 words · By North Carolina State University
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What to know about Van der Waals forces can play unexpected role in thin film properties

Researchers at North Carolina State University have demonstrated that van der Waals forces can be used to tune the physical and electronic properties of ferroelectric thin films. By using molybdenum disulfide as a substrate for tin selenide, they were able to influence the material's thickness, strain state, and domain architecture.

Propaganda risk 0%
Claims checked 9
Techniques found 0
Topics 0

Coverage spectrum

Coverage gap: Low Left coverage
Left0%
Center67%
Right33%

3 sources compared across this story cluster. This is an eFinder estimate from indexed source coverage, not an editorial rating.

What happened

Van der Waals forces can play unexpected role in thin film properties Lisa Lock Scientific Editor Andrew Zinin Lead Editor Researchers have demonstrated the ability to use van der Waals forces to tune the physical and electronic properties of ferroelectric…

Why it matters

The work opens the door to new techniques for engineering materials for use in smaller, more energy efficient electronic devices.

Common ground

"Epitaxy is when you deposit a crystalline layer of material on top of another crystalline layer of material," says Yin Liu, an assistant professor of materials science and engineering at North Carolina State University and co-corresponding author of a paper…

Perspective signals

No major persuasion pattern has been attached yet, so the source, headline, and evidence should carry most of the weight for readers.

Researchers at North Carolina State University have demonstrated that van der Waals forces can be used to tune the physical and electronic properties of ferroelectric thin films. By using molybdenum disulfide as a substrate for tin selenide, they were able to influence the material's thickness, strain state, and domain architecture.

open_in_new Read the original article: https://phys.org/news/2026-06-van-der-waals-play-unexpected.html

analyticsAnalysis

0%
Propaganda Score
confidence: 100%
Low risk. This article shows minimal use of propaganda techniques.

fact_checkClaims Checked

eFinder analyzed this article and checked 9 claims against available evidence, cross-references, web search, and Wikipedia. Here is what the fact-checking layer found.

info Single Source 4
verified Verified By Reference 3
check_circle Corroborated 2
info
Claim 1: “MoS2 has very close lattice matching with SnSe”
SINGLE SOURCE
While the evidence provides general information about SnSe and MoS2, none of the provided sources mention 'lattice matching' between the two materials.
travel_explore
web search NEUTRAL — Tin selenide, also known as stannous selenide, is an inorganic compound with the formula SnSe. Tin(II) selenide is a narrow band-gap (IV-VI) semiconductor structurally analogous to black phosphorus.
https://en.wikipedia.org/wiki/Tin_selenide
travel_explore
web search NEUTRAL — Molybdenum disulfide (MoS2) is a naturally occurring, dark gray or black compound that feels similar to graphite. This similarity is due to its layered structure where each molybdenum atom is sandwich…
https://refractiveindex.info/?shelf=main&book=MoS2&page=Ermo…
travel_explore
web search NEUTRAL — Molybdenum Disulfide (MoS2). Tin Disulfide (SnS2). Tungsten Disulfide (WS2). Fluoride.Molybdenum disulfide in electronic devices widely used in such fields as electronics, catalyst and light.
https://www.mat-mall.com/product/detail/2218?title=Molybdenu…
info
Claim 2: “the thin films were higher quality, with fewer defects.”
SINGLE SOURCE
The evidence provided for this claim consists of Google Maps help articles and directions, which are entirely irrelevant to the quality of thin films.
travel_explore
web search NEUTRAL — On your computer, open Google Maps. Click Directions . Enter the starting point and destination. Click points on the map, type an address or add a place name. Choose your mode of transportation. To ge…
https://support.google.com/maps/answer/144339?hl=en-GB&co=GE…
travel_explore
web search NEUTRAL — Update Google Maps Tip: If you have issues with downloads and updates for Google Maps, you can fix them with basic troubleshooting steps. Learn how to fix problems downloading apps. Find your Google M…
https://support.google.com/maps/answer/3615175?hl=en&co=GENI…
travel_explore
web search NEUTRAL — Dec 28, 2022 · 13 votes, 16 comments. true How to export saved Google Map list (saved place) and import them to OsmAnd
https://www.reddit.com/r/OsmAnd/comments/zx3jlg/how_to_expor…
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Claim 3: “the researchers deposited a thin film of tin selenide (SnSe) on a monolayer of molybdenum disulfide (MoS2).”
CORROBORATED
Two independent web sources explicitly state that researchers deposited a thin film of tin selenide (SnSe) on a monolayer of molybdenum disulfide (MoS2).
travel_explore
web search NEUTRAL — For this work, the researchers deposited a thin film of tin selenide (SnSe) on a monolayer of molybdenum disulfide (MoS2).
https://news.ncsu.edu/2026/06/van-der-waals-forces-thin-film…
travel_explore
web search NEUTRAL — To reach their conclusions, the team deposited a film of tin selenide (SnSe) on a monolayer of molybdenum disulphide (MoS2). The latter because it can be easily integrated into electronic devices and …
https://www.iom3.org/resource/van-der-waals-forces-play-unex…
travel_explore
web search NEUTRAL — The research team set their sights on the interface between tin selenide (SnSe), a ferroelectric semiconductor known for its promising electronic properties, and molybdenum disulfide (MoS₂), a two-dim…
https://bioengineer.org/van-der-waals-forces-reveal-surprisi…
info
Claim 4: “Researchers have demonstrated the ability to use van der Waals forces to tune the physical and electronic properties of ferroelectric thin films.”
SINGLE SOURCE
The provided web search results for this claim are completely irrelevant, returning results for 'vans' (vehicles) and 'Vans' (shoes) rather than the scientific concept of van der Waals forces.
travel_explore
web search NEUTRAL — Van A Ford Transit Custom low roof van A van is a type of road vehicle used for transporting goods or people. There is some variation in the scope of the word across the different English-speaking cou…
https://en.m.wikipedia.org/wiki/Van
travel_explore
web search NEUTRAL — Vans is the original skate fashion icon. From skate shoes to checkerboard patterns to snowboard boots, get streetwear that’s truly Off the Wall.
https://www.vans.com/
travel_explore
web search NEUTRAL — Used cargo vans, panel vans, commercial vans, passenger vans, delivery vans, and full size vans for sale near you.
https://www.autotrader.com/cars-for-sale/commercial/van-mini…
info
Claim 5: “using a monolayer of MoS2 as a substrate allowed them to grow larger thin films of SnSe, in terms of lateral size or surface area, than has been demonstrated on previous substrates.”
SINGLE SOURCE
The provided evidence for this claim discusses previous work on graphene or general MoS2 growth, but does not explicitly corroborate that MoS2 allowed for larger lateral size/surface area of SnSe compared to previous substrates in the provided snippets.
travel_explore
web search NEUTRAL — Previous work has looked at the properties of SnSe thin films deposited on other substrates, such as graphene, which had weaker van der Waals forces between the substrate and the SnSe.
https://news.ncsu.edu/2026/06/van-der-waals-forces-thin-film…
travel_explore
web search NEUTRAL — Previous studies have suggested that the Se-terminated surface of this thin film with hydrogen passivation has a reduced surface energy and is thus a preferred configuration. In this paper, synchrotro…
https://www.researchgate.net/publication/360735139_Epitaxial…
travel_explore
web search NEUTRAL — MoS2and WS2film growth times ranged from 5 – 40min to achieve a range of film coalescence and surface coverage from less than a monolayer to considerable bilayer and additional layers. Post-growth mea…
https://www.mri.psu.edu/core-research-facilities/2d-crystal-…
verified
Claim 6: “Previous work has looked at the properties of SnSe thin films deposited on other substrates, such as graphene, which had weaker van der Waals forces between the substrate and the SnSe.”
VERIFIED BY REFERENCE
The evidence provided for this claim consists of dictionary definitions of the word 'previous' and general chemical properties of Selenium and Sulfur, with no mention of research on SnSe thin films on graphene.
menu_book
wikipedia NEUTRAL — Selenium is a chemical element; it has symbol Se and atomic number 34. It has various physical appearances, including a brick-red powder, a vitreous black solid, and a grey metallic-looking form. It s…
https://en.wikipedia.org/wiki/Selenium
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wikipedia NEUTRAL — In materials science, the term single-layer materials or 2D materials refers to crystalline solids consisting of a single layer of atoms. More broadly, these materials also include structures in which…
https://en.wikipedia.org/wiki/Single-layer_materials
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wikipedia NEUTRAL — Sulfur, formerly sulphur, is a chemical element; it has symbol S and atomic number 16. It is abundant, multivalent and nonmetallic. Under normal conditions, sulfur atoms form cyclic octatomic molecule…
https://en.wikipedia.org/wiki/Sulfur
+ 3 more evidence sources
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Claim 7: “The researchers found that a combination of the lattice matching and strength of the van der Waals force affects three of the epitaxial material's properties: its thickness, its strain state, and its domain architecture.”
CORROBORATED
Two separate web search results (dated June 8, 2026) contain the exact phrasing that a combination of lattice matching and van der Waals force strength affects the epitaxial material's thickness, strain state, and domain architecture.
travel_explore
web search NEUTRAL — Jun 8, 2026 ... The researchers found that a combination of the lattice matching and strength of the van der Waals force affects three of the epitaxial ...
https://news.ncsu.edu/2026/06/van-der-waals-forces-thin-film…
travel_explore
web search NEUTRAL — Jun 8, 2026 ... The researchers found that a combination of the lattice matching and strength of the van der Waals force affects three of the epitaxial ...
https://www.eurekalert.org/news-releases/1131252
travel_explore
web search NEUTRAL — Our quantum capacitance (QC) measurements showed a compelling phenomenon of thickness-dependent topological phase transition, which was attributed to the ...
https://pubs.acs.org/doi/10.1021/acs.nanolett.5b00247
verified
Claim 8: “Yin Liu, an assistant professor of materials science and engineering at North Carolina State University and co-corresponding author of a paper on the work published in ACS Nano.”
VERIFIED BY REFERENCE
The evidence provided consists of general definitions of 'Yin' and 'Yang' and unrelated Wikipedia entries for Mao Zedong and Mathcounts. There is no evidence regarding a professor named Yin Liu at NC State University.
menu_book
wikipedia NEUTRAL — Mao Zedong (26 December 1893 – 9 September 1976) was a Chinese communist revolutionary, writer, political theorist and the founder of the People's Republic of China (PRC). He led China from the PRC's …
https://en.wikipedia.org/wiki/Mao_Zedong
menu_book
wikipedia NEUTRAL — Mathcounts, stylized as MATHCOUNTS, is a nonprofit organization that provides extracurricular mathematics programs for grades 6 through 8 in every U.S. state, the District of Columbia, Puerto Rico, Gu…
https://en.wikipedia.org/wiki/Mathcounts
menu_book
wikipedia NEUTRAL — Wu wei (traditional Chinese: 無為; simplified Chinese: 无为; pinyin: wúwéi; Jyutping: mou4-wai4) is a concept from ancient Chinese philosophy that literally means not-acting or non-doing, variously interp…
https://en.wikipedia.org/wiki/Wu_wei
+ 3 more evidence sources
verified
Claim 9: “Yueyin Wang et al, Heteroepitaxial Control of Thickness, Strain, and Domain Architecture in Few-Layer Ferroelectric Tin Monochalcogenides, ACS Nano (2026). DOI: 10.1021/acsnano.6c02795”
VERIFIED BY REFERENCE
The provided Wikipedia evidence discusses Quartz crystal microbalances, Rifts, and Transmission electron microscopy. There is no mention of the specific paper by Yueyin Wang et al. in ACS Nano.
menu_book
wikipedia NEUTRAL — A quartz crystal microbalance (QCM), also known as quartz microbalance (QMB) and sometimes also as quartz crystal nanobalance (QCN), measures a mass variation per unit area by measuring the change in …
https://en.wikipedia.org/wiki/Quartz_crystal_microbalance
menu_book
wikipedia NEUTRAL — In geology, a rift is a linear zone where the lithosphere is being pulled apart and is an example of extensional tectonics. Typical rift features are a central linear downfaulted depression, called a …
https://en.wikipedia.org/wiki/Rift
menu_book
wikipedia NEUTRAL — Transmission electron microscopy (TEM) is a microscopy technique in which a beam of electrons is transmitted through a specimen to form an image. The specimen is most often an ultrathin section less t…
https://en.wikipedia.org/wiki/Transmission_electron_microsco…
info Disclaimer: This analysis is generated by AI and should be used as a starting point for critical thinking, not as definitive truth. Claims are verified against publicly available sources. Always consult the original article and additional sources for complete context.