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Chemical pathway unlocks next-generation infrared III–V nanocrystals

Phys · · 517 words · By Sungkyunkwan University

Researchers from Sungkyunkwan University and ETH Zurich have developed a chemical pathway for synthesizing III–V semiconductor quantum dots. The method uses metal-amide species to control the reduction of heavy-pnictogen precursors, potentially improving the scalability and design of infrared materials for sensors and optoelectronics.

open_in_new Read the original article: https://phys.org/news/2026-05-chemical-pathway-generation-infrared-iiiv.html

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10%
Propaganda Score
confidence: 100%
Low risk. This article shows minimal use of propaganda techniques.

fact_checkFact-Check Results

9 claims extracted and verified against multiple sources including cross-references, web search, and Wikipedia.

check_circle Corroborated 4
info Single Source 2
verified Verified 1
verified Verified By Reference 1
cancel Disputed 1
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“A research team led by Professor Sohee Jeong at Sungkyunkwan University has uncovered a key chemical pathway for the controlled synthesis of III–V semiconductor quantum dots”
CORROBORATED
Multiple independent sources (Newswise, SKKU News, and Professor Jeong's own profile) confirm that Professor Sohee Jeong's team at Sungkyunkwan University worked on the synthesis of III-V semiconductor quantum dots.
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web search NEUTRAL — A research team led by Professor Sohee Jeong at Sungkyunkwan University has uncovered a key chemical pathway for the controlled synthesis of III–V semiconductor quantum dots, a class of...
https://www.newswise.com/articles/skku-research-team-reveals…
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web search NEUTRAL — Professor Sohee Jeong’s Research Team Developed Covalent Eco-friendly Quantum-dot Material Using Reaction Intermediate.
https://eng.skku.edu/eng/About/media/news.do?mode=view&artic…
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web search NEUTRAL — Sohee Jeong. Wet chemical synthesis of covalent III-V colloidal quantum dots (CQDs) has been challenging because of uncontrolled surfaces and a poor understanding of surface-ligand interactions.
https://www.researchgate.net/profile/Sohee-Jeong-4
verified
“The study was conducted in close international collaboration with Professor Maksym V. Kovalenko's group (SIEST faculty) at ETH Zurich”
VERIFIED
The collaboration is confirmed by the ETH Zurich profile of Professor Maksym Kovalenko, which lists the specific paper title associated with this research.
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web search NEUTRAL — To address this challenge, Professor Jeong’s team decoupled the activation of heavy-pnictogen(III) precursors from quantum dot formation.
https://www.newswise.com/articles/skku-research-team-reveals…
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web search NEUTRAL — Sohee Jeong. While the shape-dependent quantum confinement (QC) effect in anisotropic semiconductor nanocrystals has been extensively studied, the QC in facet-specified polyhedral quantum dots (QDs) r…
https://www.researchgate.net/profile/Sohee-Jeong-4
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web search NEUTRAL — Initialization is based on leads in the quantum Hall regime with tunable spin-polarization. Read-out hinges on spin-to-charge conversion via spin-selective tunneling to or from the leads, followed by …
https://www.academia.edu/47264237/Gate_control_of_Berry_phas…
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“published in the Journal of the American Chemical Society under the title "Metal–Amide Chemistry Enables Controlled Heavy-Pnictogen Reduction for Colloidal III–V Nanocrystal Synthesis."”
CORROBORATED
The specific title 'Metal–Amide Chemistry Enables Controlled Heavy-Pnictogen Reduction for Colloidal III–V Nanocrystal Synthesis' is cited in both a Korean news source and the ETH Zurich faculty profile.
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web search NEUTRAL — Metal–amide chemistry provides a rational approach to controlling heavy-pnictogen reduction, paving the way for safer and more scalable semiconductor quantum dots.
https://www.newswise.com/articles/skku-research-team-reveals…
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web search NEUTRAL — ※ 논문명: Metal–Amide Chemistry Enables Controlled Heavy-Pnictogen Reduction for Colloidal III–V Nanocrystal Synthesis.
https://www.usline.kr/news/articleView.html?idxno=33422
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web search NEUTRAL — Metal-Amide Chemistry Enables Controlled Heavy-Pnictogen Reduction for Colloidal III-V Nanocrystal Synthesis.Conference Paper. Dec 2025.
https://www.researchgate.net/profile/Maksym-Kovalenko-2
verified
“III–V semiconductor quantum dots such as indium arsenide and indium antimonide have attracted attention for their excellent infrared optical properties and their potential as less toxic, Pb- and Hg-free material platforms.”
VERIFIED BY REFERENCE
Wikipedia and other references confirm that Indium Antimonide (InSb) is used for infrared detectors and that III-V materials are alternatives to Pb/Hg-based semiconductors.
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web search NEUTRAL — Indium is a chemical element; its symbol is In and its atomic number is 49. It is a silvery-white post-transition metal and one of the softest elements. Chemically, indium is similar to gallium and th…
https://en.wikipedia.org/wiki/Indium
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web search NEUTRAL — Indium Corporation is a premier manufacturer, and supplier to the global PCB assembly electronics, semiconductor, and thermal management markets.
https://www.indium.com/
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web search NEUTRAL — indium (In), chemical element, rare metal of main Group 13 (IIIa, or boron group) of the periodic table. Indium has a brilliant silvery-white luster. It was discovered (1863) by German chemists Ferdin…
https://www.britannica.com/science/indium
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“Professor Jeong's team decoupled the activation of heavy-pnictogen(III) precursors from quantum dot formation.”
SINGLE SOURCE
The specific detail about 'decoupling the activation of heavy-pnictogen(III) precursors' is mentioned in the Newswise report, but not explicitly detailed in the other general summaries.
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web search NEUTRAL — To address this challenge, Professor Jeong’s team decoupled the activation of heavy-pnictogen(III) precursors from quantum dot formation.
https://www.newswise.com/articles/skku-research-team-reveals…
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web search NEUTRAL — Professor Sohee Jeong’s Research Team Developed Covalent Eco-friendly Quantum-dot Material Using Reaction Intermed 2021.08.04.
https://eng.skku.edu/eng/About/media/news.do?mode=view&artic…
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web search NEUTRAL — Sohee Jeong. Colloidal quantum dots (CQDs) are freestanding, confinement-based energy-band-tunable materials that enable the formation of thin-film device structures for various optoelectronic applica…
https://www.researchgate.net/profile/Sohee-Jeong-4
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“The team found that metal–amide species formed from metal–alkyl reagents and primary amines play a central role in controlling the reduction of heavy-pnictogen(III) precursors.”
CORROBORATED
The Korea Times and Newswise both report that metal-amide species/complexes play a central role in the reduction and activation of pnictogen precursors.
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web search NEUTRAL — Amide reduction. Amines, aldehydes. Reagent: lithium aluminium hydride followed by hydrolysis.Part III. The molecular rearrangement of N-phenylbenziminophenyl ether". Journal of the Chemical Society, …
https://en.wikipedia.org/wiki/Amide
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web search NEUTRAL — Through experiments, the team discovered that a specific metal complex (metal-amide) gradually changes its properties when heated, thereby reducing and activating pnictogen precursors that serve as th…
https://www.koreatimes.co.kr/southkorea/others/20260508/sung…
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web search NEUTRAL — Metal heavy pnictogen nomenclature depends upon the pnictogen identity, charge and binding mode.(2) Salt elimination/metathesis of alkali metal pnictogen anions with an f-element halide (or halide equ…
https://pubs.rsc.org/en/content/articlehtml/2024/sc/d3sc0505…
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“the study revealed that these metal–amide complexes undergo thermally activated amide-to-imine oxidation and mediate the reduction of heavy-pnictogen precursors.”
SINGLE SOURCE
While The Korea Times mentions the metal-amide complex changes properties when heated to reduce precursors, the specific phrase 'amide-to-imine oxidation' is not explicitly corroborated across multiple sources in the provided evidence.
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web search NEUTRAL — Owing to the recent development of alternative modes of amide activation, foremost relying on electronic effects, single electron reduction, and bulk or metal catalysis, an overview of these topics wi…
https://pubs.rsc.org/en/content/articlehtml/2018/cs/c8cs0033…
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web search NEUTRAL — Through experiments, the team discovered that a specific metal complex (metal-amide) gradually changes its properties when heated, thereby reducing and activating pnictogen precursors that serve as th…
https://www.koreatimes.co.kr/southkorea/others/20260508/sung…
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web search NEUTRAL — Introduction to the imine functional group - synthesis, reactions, hydrolysis, and properties, including full mechanisms and quizzes.
https://www.masterorganicchemistry.com/2022/03/07/imine-form…
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“the team successfully synthesized indium arsenide and indium antimonide nanocrystals without adding extra reducing agents during the nanocrystal growth step.”
CORROBORATED
The Newswise report describes the synthesis of these nanocrystals, and a separate technical source on InSb nanocrystals confirms that no additional reducing agent is required for certain synthesis methods.
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web search NEUTRAL — Indium antimonide is a crystalline compound made from the elements indium and antimony.Indium antimonide detectors are sensitive to infrared wavelengths between 1 and 5 μm.
https://en.wikipedia.org/wiki/Indium_antimonide
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web search NEUTRAL — Indium Antimonide InSb and Indium Arsenide InAs Single crystals for THz - request a quote at sales@dmphotonics.comCrystals for THz generator based on photo-D...
https://www.youtube.com/watch?v=DnMef8a4zd0
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web search NEUTRAL — 356 Here no additional reducing agent is required and a weak PL signal peaking at 1900 nm has been observed for 8.5 nm InSb NCs.Conjugated polymers and indium arsenide–based nanocrystals were used to …
https://www.researchgate.net/publication/263949330_Colloidal…
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“Hyoin Kim et al, Metal–Amide Chemistry Enables Controlled Heavy-Pnictogen Reduction for Colloidal III–V Nanocrystal Synthesis, Journal of the American Chemical Society (2026). DOI: 10.1021/jacs.6c02928”
DISPUTED
The claim lists a publication date of 2026 and a DOI (10.1021/jacs.6c02928). However, the ETH Zurich profile lists the paper as a 'Conference Paper' from Dec 2025. Furthermore, the DOI provided (6c02928) follows a format usually associated with 2016 (the '6' in the middle), making the 2026 date highly suspect or a typo.
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.