Biodegradable rare earth fluorochloride nanocrystals for phototheranostics

Zhao, Xinyu; Qi, Yu; Yuan, Jun; Thakor, Nitish V.; Tan, Mei Chee

doi:10.1039/d0ra00760a

Cited by 12 publications

(5 citation statements)

References 21 publications

(25 reference statements)

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“…Pada penelitian ini dihasilkan material yang mempunyai luminisens sangat terang sehingga memiliki potensi untuk dikembangkan sebagai material bioimaging. Namun, pada penelitian tersebut diketahui adanya sifat racun dari material yang dihasilkan dan ditemukan adanya ketidakcocokan bahan SrFCl ketika diaplikasikan dalam aplikasi biomedis [4] . Diketahui bahwa, pada aplikasi material biomedis sangat diutamakan material yang bersifat biokompatibel atau tidak beracun bagi manusia.…”

Section: Pendahuluanunclassified

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Sintesis dan Karakterisasi Struktur dan Sifat Magnet Nanokomposit Fe3O4@PEG:ZnO

Astuti

Khaira²,

Arief³

et al. 2022

Indonesian J Appl Phys

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Fe3O4@PEG:ZnO nanocomposites were synthesized by the coprecipitation method with various of the samples were Fe3O4, Fe3O4@ZnO (1:1), Fe3O4@PEG: ZnO (1:2), and Fe3O4@ PEG: ZnO (1:3). The samples were synthesized with variation in the concentration of ZnO to Fe3O4. The concentration ratio of (Fe3O4:ZnO) were (1:1), (1:2), and (1:3). In addition, polyethylene glycol (PEG) is also used to prevent the agglomeration of Fe3O4. Sample characterization was carried out using X-Ray Diffraction (XRD), Transmission Electron Microscope (TEM), Fourier Transform Infrared (FTIR), Particle Size Analyzer (PSA), and vibrating Sample Magnetometer (VSM). The XRD patterns show that the sample is composed of Fe3O4phase and ZnO phase with crystal structure cubic and wurtzite respectively. The TEM image shows the formation of a core-shell structure where PEG: ZnO is the shell and Fe3O4 is the core. From the FTIR results, there are C-O and C-C bonds which indicate the formation of PEG, Fe-O bonds indicate the formation of Fe3O4 and Zn-O bonds indicate the formation of ZnO. Characterization with PSA obtained particle sizes of 33 nm, 23 nm, and 16 nm with particle size distributions of 25%, 50%, and 75% so that the average particle size is 24 nm. The VSM results show that Fe3O4@PEG: ZnO (1:2) nanocomposite has a high magnetic saturation of 66.58 emu/g, with superparamagnetic properties, which has the potential to be developed as a bioimaging material.

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Section: Pendahuluanunclassified

“…Klaster-klaster ini menyerupai struktur seperti rantai disebabkan adanya interaksi dipole magnet antara partikel Fe3O4 terdekat [13]. Selain itu, juga terlihat adanya lapisan ZnO sebagai shell (warna abu-abu) yang melapisi Fe3O4 sebagai core (warna hitam), dengan kata lain sampel nanokomposit ini tersusun atas core dan shell [4,13] .…”

Section: Hasil Dan Pembahasanunclassified

Sintesis dan Karakterisasi Struktur dan Sifat Magnet Nanokomposit Fe3O4@PEG:ZnO

Astuti

Khaira²,

Arief³

et al. 2022

Indonesian J Appl Phys

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“…Combining magnetic and luminescent materials, such as lanthanide [12,13], carbon/graphene [14,15], and semiconductor [16,17], produces materials with unique properties for diferent applications. Several researchers combined Fe 3 O 4 @ZnO nanocomposites with other materials to be utilized for antibacterial application [16], photodegradation of organic pollutants [18], and targeted drug delivery [19].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Properties of Magnetic-Luminescent Fe3O4@ZnO/C Nanocomposites

Astuti

Arief

Muldarisnur

et al. 2023

Journal of Nanotechnology

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A Fe3O4@ZnO/C nanocomposite with a core-shell structure was synthesized using the co-precipitation method. To prevent the aggregation of the Fe3O4 magnetic particles, polyethylene glycol (PEG) was added. The X-ray diffractometer (XRD) results confirmed the formation of Fe3O4 and ZnO phases, with Fe3O4 having a cubic crystal system and ZnO having a hexagonal crystal system. Carbon in Fe3O4@ZnO/C had no effect on the crystal structure of Fe3O4@ZnO. Images from transmission electron microscopy (TEM) and scanning electron microscopy (SEM) revealed that the nanocomposite formed a core-shell structure. The Fourier transform infrared (FTIR) spectra verified the presence of bonds among ZnO, Fe3O4, and carbon. The appearance of the stretching vibration of the C≡C bond on the Fe3O4@ZnO/C sample revealed the nanocomposites’ carbon coupling. Photoluminescence (PL) spectroscopy was used to characterize the optical properties of the nanocomposites. Based on the results of the PL, the sample absorption of visible light was in the wavelength range of 400–700 nm. The photoluminescence of Fe3O4@ZnO differed from that of the Fe3O4@ZnO/C, especially in the deep-level emission (DLE) band. There was a phenomenon of broadening and shift of the band at a shorter wavelength, namely, in the blue wavelength region. Magnetic properties were characterized by vibrating-sample magnetometry (VSM). Based on the VSM results, the sample coupled with carbon exhibited a decrease in magnetic saturation. The presence of carbon changed photon energy into thermal energy. So, this material, apart from being a bioimaging material, can also be developed as a photothermal therapy material.

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“…Fluorohalides doped with trivalent rare-earth ions (RE 3+ ) remain comparatively unexplored. Over the past two decades, however, efforts have been undertaken to assess their potential as X-ray storage phosphors, [8][9][10][11] optical markers in bioimaging, 12 luminescent thermometers, [13][14][15] and media for optical data storage. [16][17][18][19] Almost invariably, these efforts have focused on nanocrystalline fluorohalides.…”

Section: Introductionmentioning

confidence: 99%