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Liquid metals (LM) are emerging plasmonic nanomaterials with transformable surface plasmon resonances (SPR) due to their liquid-like deformability. This study delves into the plasmonic properties of LM nanoparticles, with a focus on EGaIn (eutectic gallium-indium)-based materials. Leveraging Finite-Difference Time-Domain (FDTD) simulations, we explored the localized SPR (LSPR) effects of EGaIn nanoparticles with various shapes, including nanospheres, dimers, nanorods, nanodisks, nanoellipses, nanocubes, and nanocuboids, in the broad range of the ultraviolet (UV)-visible-near infrared (NIR) spectrum. While EGaIn is conventionally known as a UV-active metal alloy, this study reveals unique LSPR features (, higher order resonances, polar and quadrupolar modes) of EGaIn nanostructures in the broader visible and NIR wavelength ranges, providing a comprehensive map of LSPR properties for different shapes of EGaIn nanoparticles. These findings offer new insights into the dependence of the optical properties of EGaIn nanoparticles on their geometries for diverse applications, ranging from biosensing, nanoelectronics, to optomechanical systems.
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http://dx.doi.org/10.1039/d5nr02502h | DOI Listing |
Nanoscale
August 2025
Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, NC 27695, USA.
Liquid metals (LM) are emerging plasmonic nanomaterials with transformable surface plasmon resonances (SPR) due to their liquid-like deformability. This study delves into the plasmonic properties of LM nanoparticles, with a focus on EGaIn (eutectic gallium-indium)-based materials. Leveraging Finite-Difference Time-Domain (FDTD) simulations, we explored the localized SPR (LSPR) effects of EGaIn nanoparticles with various shapes, including nanospheres, dimers, nanorods, nanodisks, nanoellipses, nanocubes, and nanocuboids, in the broad range of the ultraviolet (UV)-visible-near infrared (NIR) spectrum.
View Article and Find Full Text PDFNPJ Biofilms Microbiomes
July 2025
State Key Laboratory of New Ceramics and Fine Processing, Key Laboratory of Advanced Materials, School of Materials Science and Engineering, Tsinghua University, Beijing, China.
Critical bone defects, exacerbated by infections, pose significant challenges to bone healing and homeostasis, necessitating the development of dual-functional biomimetics that combine anti-infective and reparative capabilities. The EGaIn holds promise across various disciplines, though its interactions with microbial cells require further elucidation. This investigation evaluates the antimicrobial efficacy of PEG-EGaIn nanocapsules against a spectrum of bacterial, employing electron microscopy.
View Article and Find Full Text PDFACS Omega
June 2025
Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus de la UAB s/n, Bellaterra 081093, Spain.
Liquid metal nanoparticles (LM NPs) have attracted significant attention owing to their unique properties and wide range of potential applications from electronics to biomedicine. In this study, we investigate the surface chemistry of eutectic gallium indium (EGaIn) NPs using different phosphonic acid derivatives in aqueous media. Our findings show that EGaIn NPs exhibit significant surface chemical composition changes when exposed to these ligands in solution during the ultrasonication-assisted synthesis in water, displaying optimal long-term colloidal stability in alkaline media.
View Article and Find Full Text PDFSmall
July 2025
State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, P. R. China.
Liquid metal (LM), with unique reversible morphology and tunable electronic properties, has become a promising platform for designing advanced nanozymes. The catalytic activity in nanozymes is typically highly dependent on the environmental pH value. Here a magnetic LM-buffered iron oxide nanozyme (FeO@EGaIn) is designed with pH-switchable enzymatic activities, in which LM serves as an electron transport substrate effectively promoting the catalytic efficiency.
View Article and Find Full Text PDFJ Am Chem Soc
July 2025
Chemistry and Physics of Materials Unit, School of Advanced Materials (SAMat), Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore 560064, India.
Photochromic soft metallo-supramolecular materials undergo precise, reversible transformations in structure and electronic properties under light irradiation, offering potential applications in optoelectronics, sensing, and molecular switches. Herein, we report the synthesis, characterization, and investigation of light-induced reversible morphological transformations in a Zn(II)-based photochromic coordination polymer gel (Zn-pcCPG), integrated with a dithienylethene (DTE) unit. Upon UV irradiation (λ = 365 nm), Zn-pcCPG undergoes morphological transformation from nanofibers in the gel state to spherical nanoparticles in the sol state, involving reversible photoswitching with distinct color change.
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