Effect of Liquid Ga on Metal Surfaces: Characterization of Morphology and Chemical Composition of Metals Heated in Liquid Ga

Lee, Eun Je; Hur, Min Goo; Son, Jeong Mun; Park, Jeong Hoon; Yang, Seung Dae

doi:10.1155/2013/619682

Cited by 5 publications

(2 citation statements)

References 10 publications

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“…Characteristic transitions of Ga are observed at 1146.51 (Ga 2p 1/2 ), 1119.61 (Ga 2p 3/2 ), 22.42 (Ga 3d 3/2 ), and 20.51 eV (Ga 3d 5/2 ), matching with the literature report. 43 , 44 Peaks observed at around 284 and 532 eV are ascribed to the carbon (C 1s) and oxygen (O 1s) atoms of curcumin. The comparison of C 1s and O 1s peaks of GaCurNPs with that of bare curcumin shows significant peak broadening, which may be attributed to the interaction between GaO(OH) and curcumin ( Figure 3 a).…”

Section: Resultsmentioning

confidence: 99%

Gallium–Curcumin Nanoparticle Conjugates as an Antibacterial Agent against Pseudomonas aeruginosa: Synthesis and Characterization

et al. 2022

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Combating antibiotic resistance has found great interest in the current clinical scenario. Pseudomonas aeruginosa , an opportunistic multidrug-resistant pathogen, is well known for its deadly role in hospital-acquired infections. Infections by P. aeruginosa are among the toughest to treat because of its intrinsic and acquired resistance to antibiotics. In this study, we project gallium–curcumin nanoparticle (GaCurNP) conjugates as a prospective candidate to fight against P. aeruginosa . The synthesized GaCurNPs were spherical with an average size ranging from 25–35 nm. Analysis by Fourier transform infrared (FT-IR) spectroscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy deduced the nature of interaction between gallium and curcumin. Conjugate formation with gallium was found to improve the stability of curcumin at the physiological pH. When tested after 24 h of contact, at the physiological pH and 37 °C, the degradation of curcumin bound in the GaCurNPs was 26%, while that of native curcumin was 95%. The minimum inhibitory concentration (MIC) of GaCurNPs was found to be 82.75 μg/mL for P. aeruginosa ( ATCC 27853). GaCurNPs also showed excellent biofilm inhibition at 4MIC concentration. Raman spectroscopic analysis showed that GaCurNPs are capable of disrupting the cells of P. aeruginosa within 3 h of contact. Live/dead imaging also confirmed the compromised membrane integrity in cells treated with GaCurNPs. Scanning electron microscopy analysis showed membrane lysis and cell structure damage. The AlamarBlue assay showed that when L929 cell lines were treated with GaCurNPs with concentrations as high as 350 μg/mL, the cell viability elicited by the nanoparticles was 70.89%, indicating its noncytotoxic nature. In short, GaCurNPs appear to be a promising antibacterial agent capable of fighting a clinically significant pathogen, P. aeruginosa .

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Section: Resultsmentioning

confidence: 99%

Gallium–Curcumin Nanoparticle Conjugates as an Antibacterial Agent against Pseudomonas aeruginosa: Synthesis and Characterization

et al. 2022

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“…Ga-based liquid metal (GLM) may be a potential heat-transfer material in many industries such as electronic devices and nuclear reactors because it combines environmental friendliness, high specific heat, low melting point, and many other advantages. − The friction and corrosion problems between GLM and structural components at high temperatures have become a major issue that must be confronted and solved before its large-scale industrial applications. , Compared with the traditional lubricating oils, when GLM is used as a lubricant, the lubrication state is mostly in the boundary lubrication, with a higher friction coefficient (∼0.1–0.6) and wear rate (orders of magnitude range from 10 –7 to 10 –4 mm 3 /Nm). − Unless it is used for rolling bearings with high speed (>1 m/s), the friction coefficient can be as low as 0.01. , Therefore, there is still much room for improvement in the lubricating performances of GLM, and it is valuable to explore some technical means to address this scientific problem.…”

Section: Introductionmentioning

confidence: 99%

Al-Doped Ga-Based Liquid Metal: Modification Strategy and Controllable High-Temperature Lubricity through Frictional Interface Regulation

et al. 2019

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Ga-based liquid metal (GLM) may be a potential heat-transfer material in many industries such as electronic devices and nuclear reactors, and thus, improving its lubricity is conducive to solving the friction and corrosion problems of the motion pairs served in the GLM medium. This paper proposes a modification strategy based on the conventional and large-scale mechanical milling to prepare Al-doped GLM successfully and regulates the GLM lubricity through controlling the frictional interface properties. It is found that at room temperature (∼20 °C), the Al element in the Al-doped GLM medium has a stronger adsorption capacity on the T91 surface, so the Al-rich film is formed on the frictional interfaces and reduces the wear of the T91 disk effectively compared to that in the GLM medium. However, the doping of Al is detrimental to the wear resistance of the T91 steel significantly at 400 °C by inhibiting the formation of the protective FeGa 3 film on the frictional interfaces, which readily appears at T91 frictional interfaces in the GLM medium. At 600 °C, Al atoms participate in the formation of a multilayer intermetallic film, thus improving the wear resistance again. This paper provides a new idea for preparing the metaldoped GLM and improving the lubricity of GLM, and it drives forward our understanding of the lubrication mechanisms of liquid lubricants.

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Nano Liquid Metal Fluids

Chen

2024

Handbook of Liquid Metals

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Effect of Liquid Ga on Metal Surfaces: Characterization of Morphology and Chemical Composition of Metals Heated in Liquid Ga

Cited by 5 publications

References 10 publications

Gallium–Curcumin Nanoparticle Conjugates as an Antibacterial Agent against Pseudomonas aeruginosa: Synthesis and Characterization

Gallium–Curcumin Nanoparticle Conjugates as an Antibacterial Agent against Pseudomonas aeruginosa: Synthesis and Characterization

Al-Doped Ga-Based Liquid Metal: Modification Strategy and Controllable High-Temperature Lubricity through Frictional Interface Regulation

Nano Liquid Metal Fluids

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