One-step, in situ growth of unmodified graphene – magnetic nanostructured composites

Pilatos, G.; Vermisoglou, Eleni C.; Perdikaki, Anna V.; Devlin, E.; Pappas, George S.; Romanos, George E.; Boukos, N.; Giannakopoulou, T.; Trapalis, C.; Kanellopoulos, N.K.; Karanikolos, Georgios N.

doi:10.1016/j.carbon.2013.09.023

Cited by 25 publications

(12 citation statements)

References 42 publications

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“…The absence of non-encapsulated particles in our observation can thus be considered to be an important contribution of the current synthesis method and an advantage for possible medical applications. Unlike previous related investigations in the literature in which a maximum of 15 layers of graphitic carbon were reported [4,6,11–14,18,28,29,32,37–40], this study finds over 40 layers on some particles. The formation of multi-layered graphitic shells without observation of non-encapsulated nanoparticles could be the combined effect of homogeneous distribution of Fe 2 O 3 powders in graphite by ball milling prior to the LPCVD process and gas interaction with these reactants during a relatively long reaction time (3 h).…”

Section: Resultscontrasting

confidence: 92%

“…Chemical vapor deposition (CVD) has also been employed for the synthesis of CEMNPs under different pressure conditions such as high vacuum (10 −4 –10 −6 Torr), atmospheric pressure and low pressure (0.1–1 Torr) originating from metallic salts or metallic salt-loaded silica powders, metallocene precursors and ferrofluid-loaded silicon wafers [6,11–14,16,37–40]. The formation of non-encapsulated particles encountered in the above-mentioned methods can be avoided using CVD processes by increasing the interaction area and reaction kinetics through the introduction of a gaseous carbon source.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and characterization of graphite-encapsulated iron nanoparticles from ball milling-assisted low-pressure chemical vapor deposition

Ağaoğulları

Madsen

Ögüt

et al. 2017

Carbon

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Graphite-encapsulated Fe nanoparticles were synthesized using a combined method of high-energy ball milling and low-pressure chemical vapor deposition (LPCVD). Fe2O3 and graphite powders were milled to increase their surface areas and obtain a more homogeneous distribution. LPCVD was performed at a pressure of ~0.57 Torr in a tube furnace under a CH4/H2 atmosphere at 1050°C for 1 and 3 h. As-synthesized samples were purified in a 2 M HF solution. Characterization was performed using X-ray diffractometry (XRD), scanning and transmission electron microscopy (SEM and TEM) and alternating gradient magnetometry (AGM). XRD revealed the presence of body centered cubic (BCC) and face centered cubic (FCC) Fe phases without residual iron oxides. SEM confirmed the powders were better mixed and smaller after ball milling compared to mortar and pestle milled powders. High resolution TEM showed all nanoparticles had at least four and on average 16 graphitic layers, around an Fe core ranging from 20–300 nm. Magnetic measurements indicated that nanoparticles exhibit soft ferromagnetic behavior with low saturation magnetization (17–21 emu/g) and coercivity (110 Oe). A chemical stability test performed in a 2 M HCl solution showed that graphitic shells did not degrade, nor was there evidence of core dissolution or shell discontinuity.

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Section: Resultscontrasting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of graphite-encapsulated iron nanoparticles from ball milling-assisted low-pressure chemical vapor deposition

Ağaoğulları

Madsen

Ögüt

et al. 2017

Carbon

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“…The electrochemical impedance measurements were conducted in a frequency range from 100 mHz to 100 kHz with sinusoidal perturbation of 0.01 V. All measurements were performed at room temperature. The details of electrode material preparation and specific capacitance evaluation are given in [54]. The relative error in capacitance determination was ~ 15%.…”

Section: Capacitance Estimation Of Rgo Materials Using Aqueous Electrmentioning

confidence: 99%

Effect of hydrothermal reaction time and alkaline conditions on the electrochemical properties of reduced graphene oxide

Vermisoglou

Giannakopoulou

Romanos

et al. 2015

Applied Surface Science

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“…Graphene is a two-dimensional material consisting of single or few layers of sp2-hybridized carbon atoms arranged in hexagonal lattice (Geim and Novoselov, 2010 ; Pilatos et al, 2014 , 2016 ). The antimicrobial activity of graphene-supported bimetallic Ag–Cu nanocomposites was reported by Perdikaki et al ( 2016 ).…”

Section: Bimetallic Nanoparticle Systems and Their Antimicrobial Propmentioning

confidence: 99%

Bimetallic Nanoparticles for Antimicrobial Applications

2020

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Highly effective antimicrobial agents are needed to control the emergence of new bacterial strains, their increased proliferation capability, and antibacterial resistance that severely impact public health, and several industries including water, food, textiles, and oil and gas. Recently, bimetallic nanoparticles, formed via integration of two different metals, have appeared particularly promising with antibacterial efficiencies surpassing that of monometallic counterparts due to synergistic effects, broad range of physiochemical properties, and diverse mechanisms of action. This work aims to provide a review on developed bimetallic and supported bimetallic systems emphasizing in particular on the relation between synthesis routes, properties, and resulting efficiency. Bimetallic nanostructures on graphene, zeolites, clays, fibers, polymers, as well as non-supported bimetallic nanoparticles are reviewed, their synthesis methods and resulting properties are illustrated, along with their antimicrobial activity and potential against different strains of microbes.

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One-step, in situ growth of unmodified graphene – magnetic nanostructured composites

Cited by 25 publications

References 42 publications

Synthesis and characterization of graphite-encapsulated iron nanoparticles from ball milling-assisted low-pressure chemical vapor deposition

Synthesis and characterization of graphite-encapsulated iron nanoparticles from ball milling-assisted low-pressure chemical vapor deposition

Effect of hydrothermal reaction time and alkaline conditions on the electrochemical properties of reduced graphene oxide

Bimetallic Nanoparticles for Antimicrobial Applications

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