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- W4240213251 abstract "<div>Room-temperature ferromagnetic behaviour has been reported in nanoscaled materials excepted to be diamagnetic, including gold. However, it is yet unclear which factors (size, shape, surface coating) predominantly influence the magnitude of the magnetic response. In this work, we study the magnetic and electronic properties of similarly-sized gold nanoparticles (Au NPs) coated with four different n-alkanethiols, as well as hydroxyl- and carboxyl-functionalized alkanethiols using superconducting quantum interference device (SQUID) magnetometry and ultraviolet photoelectron spectroscopy (UPS). We find room-temperature behaviour (hysteresis in magnetization vs field strength loops) in all samples, as well as large effective magnetic anisotropy. Importantly, we find the nanoparticles coated with polar chain end-groups (-OH and -COOH) show markedly higher magnetization; this increased magnetization correlates with a higher work function. This work establishes chemical handles to enhance magnetism in nanoscale gold particles.</div>" @default.
- W4240213251 created "2022-05-12" @default.
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- W4240213251 date "2020-07-23" @default.
- W4240213251 modified "2023-09-29" @default.
- W4240213251 title "Tuning the Magnetism of Gold Nanoparticles by Changing the Thiol Coating" @default.
- W4240213251 doi "https://doi.org/10.26434/chemrxiv.12693149" @default.
- W4240213251 hasPublicationYear "2020" @default.
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