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Atomic imaging

MARKS AND SMITH Atomic Imaging of Particle Surfaces... [Pg.343]

Experimentally, the EMD function p(q) can be reconstructed from a set of Compton profiles J qz ) s, and B( r) from the EMD. However, A Air) is not a direct experimental product. By combining the experimental B(r) with theoretical B aik (r), we need to derive a semiexperimental AB(r). Since the atomic image is very weak, many problems must be cleared in experimental resolution, in reconstruction (for example, selection of a set of directions and range of qzs), in various deconvolution procedures and so on. First of all, high resolution experiments are desirable. [Pg.188]

The late 1980s saw the introduction into electrochemistry of a major new technique, scanning tunnelling microscopy (STM), which allows real-space (atomic) imaging of the structural and electronic properties of both bare and adsorbate-covered surfaces. The technique had originally been exploited at the gas/so id interface, but it was later realised that it could be employed in liquids. As a result, it has rapidly found application in electrochemistry. [Pg.73]

ETEM is thus used as a nanolaboratory with multi-probe measurements. Design of novel reactions and nanosynthesis are possible. The structure and chemistry of dynamic catalysts are revealed by atomic imaging, ED, and chemical analysis (via PEELS/GIF), while the sample is immersed in controlled gas atmospheres at the operating temperature. The analysis of oxidation state in intermediate phases of the reaction and, in principle, EXELFS studies are possible. In many applications, the size and subsurface location of particles require the use of the dynamic STEM system (integrated with ETEM), with complementary methods for chemical and crystallographic analyses. [Pg.220]

Atom resolution images can be obtained in particles with diameter down to 100 A. This technique can be extremely important in particle characterization. However in order to obtain usefull information from atomic images, computer calculations are required for proper image interpretation. [Pg.342]

Fig. 1.32. Schematics of a field-ion microscope (FIM). The sample, a tip of radius 100 A is at a high positive voltage relative to a fluorescent screen, placed in a chamber filled with a few millitorrs of He. The He ions generated at the tip surface projects an atomic image of the tip. (Reproduced from Tsong, 1990, with permission.)... Fig. 1.32. Schematics of a field-ion microscope (FIM). The sample, a tip of radius 100 A is at a high positive voltage relative to a fluorescent screen, placed in a chamber filled with a few millitorrs of He. The He ions generated at the tip surface projects an atomic image of the tip. (Reproduced from Tsong, 1990, with permission.)...
Lang, N. D. (1986). Theory of single atom imaging in scanning tunneling microscopy. Phys. Rev. Lett. 56, 1164-1167. [Pg.395]

Underpotential and overpotential deposition of Bi on Au(lll) have been studied applying in situ STM [453]. It has been found that the adsorbed bismuth lifts the reconstruction of the Au(lll) surface, leading to the formation of Au islands at potentials more cathodic than 0.170 V versus SCE. Atomic images of UPD Bi layer have shown the formation of a nearly rectangular unit cell of dimension 0.39 0.02 X 0.43 0.02 nm. [Pg.891]

Figure 6.3. High Tq cuprate superconductors (HTSC) as catalysts (a) structural schematic diagram of YBa2Cu307 ( 123 ) HTSC with Cu02 sheets (b) HRTEM atomic image of the 123 phase in [010] projection with ED pattern. The image is recorded near the Scherzer defocus. The positions of the Y, Ba and Cu atom columns are indicated. The layer separation is "- 1.18 nm and the unit cell is outlined. (After Gai and Thomas 1991.)... Figure 6.3. High Tq cuprate superconductors (HTSC) as catalysts (a) structural schematic diagram of YBa2Cu307 ( 123 ) HTSC with Cu02 sheets (b) HRTEM atomic image of the 123 phase in [010] projection with ED pattern. The image is recorded near the Scherzer defocus. The positions of the Y, Ba and Cu atom columns are indicated. The layer separation is "- 1.18 nm and the unit cell is outlined. (After Gai and Thomas 1991.)...

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See also in sourсe #XX -- [ Pg.352 ]




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Atomic Imaging of particle

Atomic Imaging of particle surfaces

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Atomic force microscope image formation

Atomic force microscope imaging of chromatin fibers

Atomic force microscopic images

Atomic force microscopy (AFM imaging

Atomic force microscopy image quality

Atomic force microscopy images

Atomic force microscopy imaging

Atomic force microscopy imaging modes

Atomic force microscopy imaging principle

Atomic force microscopy imaging probes

Atomic force microscopy oscillating cantilever imaging modes

Atomic force microscopy phase-imaging

Atomic force microscopy topographical images

Atomic force microscopy triblock copolymer images

Atomic image type

Atomic images, grain boundaries

Atomic imaging principle

Atomic liquid imaging

Atomic number imaging

Atomic number imaging supported catalysts

Atomic number imaging using STEM

Atomic phase image

Atomic phase imaging

Atomic resolution imaging

Atomic scale imaging experimental techniques

Atomic scale imaging oscillation

Atomic science image history

Atomic topographical image

Atomic-force microscope image

Atomic-resolution image

Atomic-scale imaging, of supported metal

Atomic-scale imaging, of supported metal nanocluster catalysts

Atoms images

Atoms images

Chemical images atom labels

Chemical waves atomic scale imaging, oscillation

IMAGING IN THE ATOMIC FORCE MICROSCOPE

Imaging Atoms, Molecules, and Chemical Reactions

Imaging Membranes Using Atomic Force Microscopy

Imaging Polymer Morphology using Atomic Force Microscopy

Imaging and Moving Individual Atoms

Imaging atom-probe

Imaging atomic spectroscopy

Imaging atomic, particle surfaces

Imaging atomic-scale

Imaging individual atoms

Minimum image problem, atomic

Recording atomic force microscopy images

Scanning transmission electron microscopy atomic number imaging

Scanning tunneling microscopy atomic resolution images

Supported metal nanocluster catalysts atomic-scale imaging

Tapping mode atomic force microscopy phase images

The Scanning Tunneling Microscope (STM) Images of Individual Atoms on Surfaces

Three-dimensional atomic force microscopy image

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