Ultrasonic cavitation of molten gallium in water: entrapment of organic molecules in gallium microspheres

Kumar, Vijay Bhooshan; Koltypin, Yuri; Gedanken, Aharon; Porat, Ze’ev

doi:10.1039/c3ta13573j

Cited by 40 publications

(37 citation statements)

References 19 publications

(23 reference statements)

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“…[21][22][23][24] After sonication and separation of the precipitates, the fluorescence emitted from Ga@C-dots in the supernatant solution was recorded at different excitation wavelengths (330, 350, 370, 390, 410, 430, 450, 470, and 490 nm). The results that were obtained from Ga@C-dots which were produced in the presence of different amounts of Ga (70, 175, 350, and 700 mg) were identical to those in our previous reports 21 (data not shown).…”

Section: Results and Discussion Chemical Characterization Of The Ga@cmentioning

confidence: 99%

Ga@C-dots as an antibacterial agent for the eradication of <em>Pseudomonas aeruginosa</em>

Kumar¹,

Natan²,

Jacobi³

et al. 2017

IJN

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The opportunistic pathogen Pseudomonas aeruginosa causes infections that are difficult to treat by antibiotic therapy. This research article reports on the synthesis of gallium (Ga) doped in carbon (C)-dots (Ga@C-dots) and their antimicrobial activity against free-living P. aeruginosa bacteria. The synthesis of Ga@C-dots was carried out by sonicating molten Ga (for 2.5 h) in polyethylene glycol-400, which acts as both a medium and carbon source. The resultant Ga@C-dots, having an average diameter of 9±2 nm, showed remarkably enhanced antibacterial activity compared with undoped C-dots. This was reflected by the much lower concentration of Ga doped within Ga@C-dots which was required for full inhibition of the bacterial growth. These results highlight the possibility of using Ga@C-dots as potential antimicrobial agents.

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Section: Results and Discussion Chemical Characterization Of The Ga@cmentioning

confidence: 99%

Ga@C-dots as an antibacterial agent for the eradication of <em>Pseudomonas aeruginosa</em>

Kumar¹,

Natan²,

Jacobi³

et al. 2017

IJN

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“…15, 16 We also demonstrated that some organic compounds, such as phenanthroline and congo red, could be entrapped to some extent in the gallium particles when the process was performed in aqueous solutions of these compounds. In the current work we checked the possibility of creating gallium particles which are enantio-selective by preparing them in aqueous solutions of D-or L-tryptophan, and thus inducing some kind of imprinted chirality in their structure.…”

Section: Introductionmentioning

confidence: 90%

Chiral imprinting in molten gallium

et al. 2015

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Chiral imprinting in molten gallium can be attained by ultrasonic irradiation of molten Ga overlayed by an aqueous solution of D-or L-tryptophan. The products are micro/nanoparticles of Ga encapsulating molecules of one of the enantiomers. After leaching of the enantiomer in pure water, molecular templates are left on the surface of the gallium particles, enabling the entrapment of the specific enantiomer from a solution of the racemate and yielding an enantiomeric excess of 6-12%. The extent of the enantiomeric excess was determined using polarimetry, Chiral HPLC and circular dichroism measurements.

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“…8 Ternary alloy nanoparticles are of interest as they might, for instance, provide a facile pathway for incorporation of dopants in nanoscale structures such as nanowires and controlled modification of the surface of the nanowires by ordered carbon shells leads to drastic changes in the solubility. [15][16][17] Performing this process in aqueous solutions of metallic ions (Ag, Cu, and Au) that have more positive reduction potentials than gallium resulted in the instantaneous reduction of these ions by Ga and formation of intermetallic compounds (Ag 2 Ga, CuGa 2 and AuGa 2 ) in the form of particles. Formation by laser ablation of bulk alloys was reported by few research groups.…”

Section: Introductionmentioning

confidence: 99%

Formation of particles of bismuth-based binary alloys and intermetallic compounds by ultrasonic cavitation

et al. 2015

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This work describes the interactions of molten bismuth with other low-melting point metals (Sn, In, Ga and Zn) under sonication. Binary combinations of bismuth and one of these metals were melted together in hot silicone oil and irradiated with ultrasonic energy to form micro/nano alloy particles. The morphology, composition and crystal structure of these particles were analyzed. It was found that bismuth forms metal matrix composites with tin and zinc, intermetallic compounds with indium and an alloy with gallium. We also followed the structural changes in the system by X-ray diffraction (XRD), differential scanning calorimetry (DSC), and electron microscopy.

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Ultrasonic cavitation of molten gallium in water: entrapment of organic molecules in gallium microspheres

Cited by 40 publications

References 19 publications

Ga@C-dots as an antibacterial agent for the eradication of <em>Pseudomonas aeruginosa</em>

Ga@C-dots as an antibacterial agent for the eradication of <em>Pseudomonas aeruginosa</em>

Chiral imprinting in molten gallium

Formation of particles of bismuth-based binary alloys and intermetallic compounds by ultrasonic cavitation

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