Dependence of structural phase transition and lattice strain of Fe3O4 nanoparticles on calcination temperature

Jafari, Atefeh; Shayesteh, S. Farjami; Salouti, Mojtaba; Boustani, Komail

doi:10.1007/s12648-014-0627-y

Cited by 23 publications

(11 citation statements)

References 44 publications

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“…Jarari et al 28 However, there have also been reports in which no considerable change in lattice parameter was observed even after reducing the size down to 4 nm 30 . The intercept of the linear fit gives the inverse of the crystalline size 11(1) nm and the slope of the curve gives a local lattice distortion of η = 0.00134(68), which is in excellent agreement with the grain size estimated from the XRD spectra and larger than the TEM result due to the interconnecting effect of nanoparticles.…”

Section: Structural Analysismentioning

confidence: 93%

Memory effect in weakly-interacting Fe₃O₄ nanoparticles

et al. 2015

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This study addresses the issue of whether the magnetite Fe 3 O 4 nanoparticle shows a true spin-glass like behavior or if this is an artifact of interparticle interaction. Transmission electron microscopy and X-ray diffraction pattern analysis confirms the formation of pseudospherical Fe 3 O 4 nanoparticles with a grain size of 8(1) nm. The magnetic moment relaxation M(t) follows a stretched exponential and power law function, confirming the presence of multiple-magnetic anisotropic barriers (β = 0.51(1)) and weak-interparticle interaction (n = 0.60(4)), respectively.The observed field cooling (FC) memory effect occurs because of the presence of magnetic anisotropy arising from a broad size distribution and weak-interparticle interactions. The absence of the zero-field-cooled (ZFC) memory effect signals that the Fe 3 O 4 nanoparticle system is not a true spin-glass system, and the observed decreasing behavior of magnetization in FC measurement is an artifact of the weak-interparticle interaction.

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Section: Structural Analysismentioning

confidence: 93%

Memory effect in weakly-interacting Fe₃O₄ nanoparticles

et al. 2015

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“…2a) can be associated with the Fe–O stretching mode (Jafari et al 2015). This latter band is shifted to 581 cm −1 for SPIONs coated with peptide (Fig.…”

Section: Resultsmentioning

confidence: 99%

Physicochemical properties and in vitro cytotoxicity of iron oxide-based nanoparticles modified with antiangiogenic and antitumor peptide A7R

et al. 2017

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Superparamagnetic iron oxide-based nanoparticles (SPIONs) are promising carriers as targeted drug delivery vehicles, because they can be guided to their target with the help of an external magnetic field. Functionalization of nanoparticles’ surface with molecules, which bind with high affinity to receptors on target tissue significantly facilitates delivery of coated nanoparticles to their targeted site. Here, we demonstrate conjugation of an antiangiogenic and antitumor peptide ATWLPPR (A7R) to SPIONs modified with sebacic acid (SPIONs-SA). Successful conjugation was confirmed by various analytical techniques (FTIR, SERS, SEM-EDS, TEM, TGA). Cell cytotoxicity studies, against two cell lines (HUVEC and MDA-MB-231) indicated that SPIONs modified with A7R reduced HUVEC cell viability at concentrations higher than 0.01 mg Fe/mL, in comparison to cells that were exposed to either the nanoparticles modified with sebacic acid or A7R peptide solely, what might be partially caused by a process of internalization.Electronic supplementary materialThe online version of this article (doi:10.1007/s11051-017-3859-x) contains supplementary material, which is available to authorized users.

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“…Pada spektrum sampel S1 terlihat bahwa muncul puncakpuncak difraksi pada sudut 2 30,22 , 35,50 , 42,92 , 57,00 , dan 62,38 . Puncakpuncak difraksi tersebut menyatakan indeks miller pada bidang (220), (311), (400), (511), dan (440) yang mana merupakan puncak difraksi material Fe 3 O 4 dengan struktur invers spinel dengan space group Fd3m sesuai dengan data standar JCPDS (ICDD card No :19-0629) [5]. Puncakpuncak difraksi yang sama juga muncul pada sampel yang lain (S2,S3,S4).…”

Section: Hasil Dan Pembahasanunclassified

Kajian Struktur Kristal, Lattice Strain, Dan Komposisi Kimia Nanopartikel Pasir Besi Yang Disintesis Dengan Metode Ball Milling

Nurrohman¹,

Pribadi²

2018

Konstan

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Penelitian ini bertujuan untuk mensintesis nanopartikel magnetik pasir besi menggunakan metode ball milling dan mempelajari karakteristiknya. Pasir besi yang digunakan sebagai sampel penelitian berasal dari Pantai Cemara Sewu, Cilacap. Proses sintesis nanopartikel diawali dengan mengukur kecepatan wadah mesin ball milling supaya tidak melebihi kecepatan kritisnya. Selanjutnya sampel dimilling selama 0 jam, 2 jam, 4 jam, dan 6 jam dan kemudian struktur kristal dan lattice strain dari nanopartikel dipelajari masing – masing dengan menggunakan formula Scherrer dan analisis Hall – Williamson dari data karakterisasi XRD sedangkan komposisi kimia dari sampel ditentukan dari hasil karakterisasi XRF. Seluruh data analisis yang diperoleh dari setiap sampel kemudian dielaborasikan dan didiskusikan secara detail dalam paper ini untuk mengetahui pengaruh waktu milling terhadap karakteristik nanopartikel yang dihasilkan.

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Dependence of structural phase transition and lattice strain of Fe3O4 nanoparticles on calcination temperature

Cited by 23 publications

References 44 publications

Memory effect in weakly-interacting Fe₃O₄ nanoparticles

Memory effect in weakly-interacting Fe₃O₄ nanoparticles

Physicochemical properties and in vitro cytotoxicity of iron oxide-based nanoparticles modified with antiangiogenic and antitumor peptide A7R

Kajian Struktur Kristal, Lattice Strain, Dan Komposisi Kimia Nanopartikel Pasir Besi Yang Disintesis Dengan Metode Ball Milling

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Dependence of structural phase transition and lattice strain of Fe3O4 nanoparticles on calcination temperature

Cited by 23 publications

References 44 publications

Memory effect in weakly-interacting Fe3O4 nanoparticles

Memory effect in weakly-interacting Fe3O4 nanoparticles

Physicochemical properties and in vitro cytotoxicity of iron oxide-based nanoparticles modified with antiangiogenic and antitumor peptide A7R

Kajian Struktur Kristal, Lattice Strain, Dan Komposisi Kimia Nanopartikel Pasir Besi Yang Disintesis Dengan Metode Ball Milling

Contact Info

Product

Resources

About

Memory effect in weakly-interacting Fe₃O₄ nanoparticles

Memory effect in weakly-interacting Fe₃O₄ nanoparticles