Nanoparticle characterization techniques

Titus, Deena; Samuel, E. James Jebaseelan; Roopan, Selvaraj Mohana

doi:10.1016/b978-0-08-102579-6.00012-5

Cited by 191 publications

(118 citation statements)

References 32 publications

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“…Numerous catalytically active nanomaterials of various origin are currently being created in the world (Cormode et al, 2018;Titus et al, 2019), which include nanomaterials with enzyme-mimetic properties, as a potential alternative to natural enzymes and for use in immunoassay, biosensor, oncotherapy, pharmacy, food industry, ecology, etc. (Chen et al, 2012(Chen et al, , 2014Fu, 2014;Lu et al, 2015;Li & Zhang, 2016;Tsekhmistrenko et al, 2018;Mu et al, 2019).…”

Section: Characterization Of Nanoparticlesmentioning

confidence: 99%

“…For comparison, DNA strands have a diameter of 2.5 nm (Lyubchenko & Shlyakhtenko, 1997), a typical virus of about 100 nm (Walkey, 2018), and a bacterium of about 1-3 μm wide (Katz et al, 2003). Occupying the intermediate position between individual atoms and molecules, nanoparticles exhibit fundamentally different physical and chemical properties compared to the macrocosm (Temerk et al, 2016;Wang et al, 2018a;Titus et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

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Bacterial synthesis of nanoparticles: A green approach

et al. 2020

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In recent decades, the attention of scientists has been drawn towards nanoparticles (NPs) of metals and metalloids. Traditional methods for the manufacturing of NPs are now being extensively studied. However, disadvantages such as the use of toxic agents and high energy consumption associated with chemical and physical processes impede their continued use in various fields. In this article, we analyse the relevance of the use of living systems and their components for the development of "green" synthesis of nano-objects with exceptional properties and a wide range of applications. The use of nano-biotechnological methods for the synthesis of nanoparticles has the potential of large-scale application and high commercial potential. Bacteria are an extremely convenient target for green nanoparticle synthesis due to their variety and ability to adapt to different environmental conditions. Synthesis of nanoparticles by microorganisms can occur both intracellularly and extracellularly. It is known that individual bacteria are able to bind and concentrate dissolved metal ions and metalloids, thereby detoxifying their environment. There are various bacteria cellular components such as enzymes, proteins, peptides, pigments, which are involved in the formation of nanoparticles. Bio-intensive manufacturing of NPs is environmentally friendly and inexpensive and requires low energy consumption. Some biosynthetic NPs are used as heterogeneous catalysts for environmental restoration, exhibiting higher catalytic efficiency due to their stability and increased biocompatibility. Bacteria used as nanofactories can provide a new approach to the removal of metal or metalloid ions and the production of materials with unique properties. Although a wide range of NPs have been biosynthetic and their synthetic mechanisms have been proposed, some of these mechanisms are not known in detail. This review focuses on the synthesis and catalytic applications of NPs obtained using bacteria. Known mechanisms of bioreduction and prospects for the development of NPs for catalytic applications are discussed.

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Section: Characterization Of Nanoparticlesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Bacterial synthesis of nanoparticles: A green approach

et al. 2020

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“…Atomic force microscopy (AFM) is a versatile and powerful scanning probe microscopy that provides information such as physical topography, adhesion strength, magnetic forces, and mechanical properties about the surface of the sample [ 22 , 128 – 130 ]. As compared to SEM and TEM, AFM gives reliable measurements at nanoscales [ 131 ].…”

Section: Structural Morphological and Thermal Characterization Tmentioning

confidence: 99%

“…Furthermore, AFM offers three-dimensional (3D) topographical images with higher resolutions unlike two-dimensional (2D) projections given by SEM and TEM [ 129 , 130 ]. The operation principle of AFM is based on the interaction between the surface of the sample and cantilever tip ( Figure 18 ) [ 22 ]. When the cantilever tip approaches the sample surface, a small deflection which is due to the attraction force between the surface and tip is observed [ 64 ].…”

Section: Structural Morphological and Thermal Characterization Tmentioning

confidence: 99%

Instrumental Techniques for Characterization of Molybdenum Disulphide Nanostructures

Ramohlola

Iwuoha

Hato

et al. 2020

Journal of Analytical Methods in Chemistry

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The excellent chemical and physical properties of materials (nanomaterials) with dimensions of less than 100 nm (nanometers) resulted in researchers and industrialists to have great interest in their discovery and applications in various systems/applications. As their sizes are reduced to nanoscale, these nanomaterials tend to possess exceptional properties differing from those of their bulk counterparts; hence, they have found applications in electronics and medicines. In order to apply them in those applications, there is a need to synthesise these nanomaterials and study their structural, optical, and electrochemical properties. Among several nanomaterials, molybdenum disulphide (MoS2) has received a great interest in energy applications due to its exceptional properties such as stability, conductivity, and catalytic activities. Hence, the great challenge lies in finding the state-of-the-art characterization techniques to reveal the different properties of MoS2 nanostructures with great accuracy. In this regard, there is a need to study and employ several techniques to accurately study the surface chemistry and physics of the MoS2 nanostructures. Hence, this review will comprehensively discuss a detailed literature survey on analytical techniques that can be used to study the chemical, physical, and surface properties of MoS2 nanostructures, namely, ultraviolet-visible spectroscopy (UV-vis), photoluminescence spectroscopy (PL), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, time-of-flight secondary ion mass spectroscopy (TOF-SIMS), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning and transmission electron microscopies (SEM and TEM), atomic force microscopy (AFM), energy dispersive X-ray spectroscopy (EDS/X), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), and electroanalytical methods which include linear sweep (LSV) and cyclic (CV) voltammetry and electrochemical impedance spectroscopy (EIS).

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“…The adopted analytic approach, which combined SEM and EDX measurements, provided a semi-quantitative estimation of cellular uptake without the use of luminescent probes. However, from the EDX measurements it is not possible to determine if MNPs are localized inside the cell or anchored on the cell membrane because of the large EDX sampling depth (about 2 µm [34]). Hence CLSM and TEM measurements were also performed to confirm FA-PEG@MNPs cell uptake and to obtain information on the their localizations in the cells.…”

Section: Cellular Uptake and Localization: Sem/edx Tem And Confocalmentioning

confidence: 99%

The Interplay between Fe3O4 Superparamagnetic Nanoparticles, Sodium Butyrate, and Folic Acid for Intracellular Transport

Cambria

Villaggio

Laudani

et al. 2020

IJMS

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Combined treatments which use nanoparticles and drugs could be a synergistic strategy for the treatment of a variety of cancers to overcome drug resistance, low efficacy, and high-dose-induced systemic toxicity. In this study, the effects on human colon adenocarcinoma cells of surface modified Fe3O4 magnetic nanoparticles (MNPs) in combination with sodium butyrate (NaBu), added as a free formulation, were examined demonstrating that the co-delivery produced a cytotoxic effect on malignant cells. Two different MNP coatings were investigated: a simple polyethylene glycol (PEG) layer and a mixed folic acid (FA) and PEG layer. Our results demonstrated that MNPs with FA (FA-PEG@MNPs) have a better cellular uptake than the ones without FA (PEG@MNPs), probably due to the presence of folate that acts as an activator of folate receptors (FRs) expression. However, in the presence of NaBu, the difference between the two types of MNPs was reduced. These similar behaviors for both MNPs likely occurred because of the differentiation induced by butyrate that increases the uptake of ferromagnetic nanoparticles. Moreover, we observed a strong decrease of cell viability in a NaBu dose-dependent manner. Taking into account these results, the cooperation of multifunctional MNPs with NaBu, taking into consideration the particular cancer-cell properties, can be a valuable tool for future cancer treatment.

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Nanoparticle characterization techniques

Cited by 191 publications

References 32 publications

Bacterial synthesis of nanoparticles: A green approach

Bacterial synthesis of nanoparticles: A green approach

Instrumental Techniques for Characterization of Molybdenum Disulphide Nanostructures

The Interplay between Fe3O4 Superparamagnetic Nanoparticles, Sodium Butyrate, and Folic Acid for Intracellular Transport

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