Nanoparticles energy-dispersed analysis

To identify nanoparticles there are several analytical techniques, including crystalline nature, surface plasmon resonance, size, shape, stability, nature, etc., which was done by various analytical instruments, such as UV-visible spectroscopy, X-ray diffractometry, Fourier transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, energy dispersive analysis, zeta potential, etc. These are mostly used for analysis of synthesized nanoparticles, which helps us to study crystalline nature, functional groups, and morphological studies, and to identify its stability. 

Figure 12. Energy dispersed analysis of composite Al/Si oxide nanoparticles.

Fig. 5 Energy dispersive X-ray analysis for the facetted gold particles showing that the highly facetted triangular nanoparticles are metallic gold... 

Particle composition is far more difficult to evaluate. Bulk elemental analysis [atomic absorption spectroscopy (AA) or inductively coupled plasma mass spectrometry (ICP-MS) are most common for metals] is useful in confirming the overall bimetallic composition of the sample, but provides no information regarding individual particles. Microscopy techniques, particularly Energy Dispersive Spectroscopy (EDS), has supported the assertion that bimetallic DENs are bimetallic nanoparticles, rather than a physical mixture of monometallics [16]. Provided the particle density is low... 

Figure 9.1 shows an example of nanoparticles formed from H2PtClg and NaAuCl4 (below 10 mM). The supporting electrolyte was HC104 (1 M). Energy dispersive X-ray (EDX) analysis revealed that the particles formed are an alloy... 

The transmission electron microscopy (TEM) analysis (Figure 1.5) and the presence of elemental silver in the membranes of treated bacteria, as detected by energy dispersive X-ray analysis (EDAX) (Figure 1.6) confirm the incorporation of silver nanoparticles into the membrane structure. 

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