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Updated: Aug 26, 2025
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Atom Probe Tomography Studies on the CuIn,GaSe2 Grain Boundaries
Published on: April 22, 2013
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Assembly-induced spin transfer and distance-dependent spin coupling in atomically precise AgCu nanoclusters.
Nan Xia1,2, Jianpei Xing3, Di Peng1,4
1Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei, 230031, P. R. China.
Nature Communications
|October 8, 2022
Summary
Researchers achieved a novel straight-chain assembly of silver-copper nanoparticles larger than 1 nm. This breakthrough demonstrates assembly-induced spin transfer and distance-dependent spin coupling in nanoparticles.
Area of Science:
- Materials Science
- Nanotechnology
- Chemistry
Background:
- Nanoparticle assembly offers unique properties but is hindered by unknown compositions and surface structures.
- Achieving atomically precise nanoparticle assemblies, especially with cores larger than 1 nm, remains a significant challenge.
Purpose of the Study:
- To develop a method for synthesizing and assembling atomically precise nanoparticles with controlled structures.
- To investigate the properties of these assembled nanoparticles, focusing on spin behavior and inter-particle interactions.
Main Methods:
- On-site synthesis-and-assembly strategy.
- Mass spectrometry and single crystal X-ray crystallography for structural determination.
- Magnetic property measurements and disassembly experiments.
Main Results:
- Successfully obtained a straight-chain assembly of Ag77Cu22(CHT)48 nanoparticles (CHT: cyclohexanethiolate), with inter-particle separation by a single sulfur atom.
- Identified assembly-induced spin transfer, with magnetic moments localized at sulfur linkers exhibiting magnetic isotropy.
- Demonstrated that spin coupling and loss of paramagnetism are dependent on inter-nanoparticle distance, without inducing nanoparticle growth.
Conclusions:
- The study presents a novel method for creating precisely structured nanoparticle assemblies.
- Assembly-induced spin transfer and distance-dependent spin coupling are key phenomena in these systems.
- The findings open new avenues for designing functional nanomaterials with tunable magnetic properties.
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