2022
DOI: 10.1002/slct.202201375
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Synthesis and Characterization of Hyper‐Branched Nanoparticles with Magnetic and Plasmonic Properties

Abstract: Hybrid nanoparticles, composed of an iron oxide magnetic core embedded with gold fractal‐grown hyper branches, have been synthesized by a seed‐mediated growth approach. Magnetic and plasmonic properties have been described respectively through ferromagnetic resonance (FMR) and extinction spectra. According to the hydroxylamine amount, used as a surface catalysed reducing agent, the number of branches and the intensity of the fractal growth have been finely tuned and were observed through TEM microscopy. The ma… Show more

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Cited by 9 publications
(4 citation statements)
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“…We administered the light to the bacteria simultaneously with the dosage of the nanoparticles, and this caused the fast aggregation of nanoparticles, induced by light [ 71 ], on the bacterial surface. According to our previous studies [ 17 , 18 ], the clusters have a greater photothermal effect than single nanoparticles, and this was confirmed by the total bacterial inhibition growth. Since this clustering occurs only in the presence of bacteria, this system may represent a proof-of-concept of an innovative nanoscale pathogen responsive system against bacterial infections.…”
Section: Introductionmentioning
confidence: 58%
See 1 more Smart Citation
“…We administered the light to the bacteria simultaneously with the dosage of the nanoparticles, and this caused the fast aggregation of nanoparticles, induced by light [ 71 ], on the bacterial surface. According to our previous studies [ 17 , 18 ], the clusters have a greater photothermal effect than single nanoparticles, and this was confirmed by the total bacterial inhibition growth. Since this clustering occurs only in the presence of bacteria, this system may represent a proof-of-concept of an innovative nanoscale pathogen responsive system against bacterial infections.…”
Section: Introductionmentioning
confidence: 58%
“…In particular, they have raised high interest in cell biology and biomedicine due to their unique chemical, optical and electronic properties that result from their minute size [ 10 , 11 , 12 , 13 ]. Interestingly, when light interacts with gold nanoparticles, it is both scattered and absorbed causing a surface plasmon excitation and the resulting spectral shape of the absorbed radiation depends on many factors such as the size, shape, composition, and environment of the nanoparticles [ 14 , 15 , 16 , 17 , 18 , 19 , 20 ]. Over the years, scientists around the world have been experimenting with the synthesis of metal nanoparticles of different shapes and sizes.…”
Section: Introductionmentioning
confidence: 99%
“…Photothermal characterization. The nanospheres with diameter of 25 nm and 70 nm were irradiated for 15 minutes by a laser source (λ = 532 nm, 60 mW) [52]. In each sample a temperature increase was observed: 7°C for the smaller and 10°C for the larger ones (Fig.…”
Section: In Si)mentioning
confidence: 99%
“… 16 In general, nanoparticles possess a high surface area-to-volume ratio. 17 It is worth stating that the branching/spike morphology of the gold nanostar contributes to the high surface area-to-volume ratio 17 necessary for synthesizing an effective nano-fungicide. Furthermore, the branching/spike in gold nanostar possesses high-index facets that exhibit superior catalytic activity and can enhance the signals associated with surface-enhanced Raman spectroscopy (SERS).…”
Section: Introductionmentioning
confidence: 99%