High resolution transmission electron microscopy HR-TEM

High resolution transmission electron microscopy (HR-TEM) studies... 

The formation of covalently PEG-grafted SWCNT hybrid material was achieved by the reaction of SWCNT-COC1 with hydroxyl-terminated PEG in various solvents. Two different self-assembling morphologies, depending on the quality of the solvent, were discovered by high-resolution transmission electron microscopy (HR-TEM) [141]. 

High Resolution Transmission Electron microscopy (HR-TEM) images were recorded on a Philips CM-30 microscope operated at 250 kV. The films were scratched from the substrate. The collected powders and flakes were grinded and dispersed in ethanol. Then the suspensions were dropped gently to a holey amorphous carbon film on a Ni or Cu grid. The Particle size distribution (PSD) was obtained by measuring 100 particles from the TEM micrographs. The mean... 

An enormous step forward [especially in terms of the characterization involving, among others, infrared (IR) and NMR spectroscopy, high-resolution transmission electron microscopy (HR-TEM) and X-ray diffraction (XRD)] was achieved during studies conducted from 1988 onwards by the group of Steigerwald and Brus at... 

Superlattices of 5.0 nm silver nanopartides have also become available from alkylthiolate-protected colloids [7-9]. Subsequent examination using high-resolution transmission electron microscopy (HR-TEM) permitted quite precise information regarding the architecture of the crystals to be obtained, and confirmed that these materials consisted of highly ordered truncated octahedrons (see Figure 4.7). 

The use of EPR as a key tool to characterize electronic structure and to reveal the nature of the active sites has been recently considered by Fittipaldi et al. [40], The power of the EPR technique to investigate the local properties is exemplified with C , N , B , and F , as weU as some anion codoped Ti02 and has been summarized, and the limitations and challenges are critically discussed. In particular, complementary techniques in addition to the EPR characterization, such as high-resolution transmission electron microscopy (HR-TEM), X-ray photoelectron spectroscopy (XPS), XRD, Raman spectroscopy, and computational calculations, can improve the general understanding. 

Fig. 1.2 Aberration-corrected high-resolution transmission electron microscopy (HR-TEM) images of HIF-Pt/C catalysts, showing the high density of atomic steps [33]...

In certain instances, pore dimensions can be determined by high-resolution transmission electron microscopy (HR-TEM), the micrograph shown in Figure 2 that clearly demonstrates the mesopores of an MCM-41 material, which has uniform pore diameters of 4 nm. 

Different techniques such as Fourier transform infrared (FT-IR), UV/visible spectroscopy (UV/Vis), high performance liquid chromatography (HPLC), gas chromatography (GC), transmission electron microscopy (TEM), high resolution transmission electron Microscopy (HR-TEM), and X-Ray Diffraction (XRD) have been employed for the characterization of cellulose crystals. 

In recent years, with the advent of high resolution electron microscopes it has become possible to image atomic details in nanocrystals [9], Some of the above mentioned structural defects can be imaged by the high resolution transmission electron microscopy (HR-TEM), as illustrated in Fig. 1.2 for monoclinic Z1O2 nanocrystals, which terminate with structural defects as steps, kinks edges and corners [19]. 

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