Theory of Size, Confinement, and Oxidation Effects

Sun, Chang Q.

doi:10.1002/9780470108970.ch1

Cited by 7 publications

(2 citation statements)

References 107 publications

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“…For an isolated nanosolid or a complex consisting of highly dispersed nanosolids, the measured lattice constants are often found to contract while for a nanosolid embedded in a matrix of different materials or passivated chemically, they may expand [149]. For example, oxygen chemisorption could expand the first metallic interlayer by up to 10e25% due to the penetration of oxygen atoms into the interlayer spacing for tetrahedron formation [3].…”

Section: Observations and Interpretationsmentioning

confidence: 99%

Size dependence of nanostructures: Impact of bond order deficiency

Sun

2007

Progress in Solid State Chemistry

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717

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Section: Observations and Interpretationsmentioning

confidence: 99%

Size dependence of nanostructures: Impact of bond order deficiency

Sun

2007

Progress in Solid State Chemistry

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825

717

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“…The lattice constants of an isolated nanosolid or a complex consisting of highly dispersed nanosolids are often shorter [58,59] than that of the bulk while for a nanosolid embedded in a matrix of different materials or passivated chemically, the lattice constant may expand [60]. For example, oxygen chemisorption could expand the first metallic interlayer by up to 10-25 % due to the penetration of oxygen atoms into the interlayer spacing for tetrahedron bond formation [61].…”

Section: Known Factsmentioning

confidence: 98%

Skin Bond Relaxation and Nanosolid Densification

Sun

2014

Springer Series in Chemical Physics

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• Surface consisting of a few number of atomic layers forms the skin of a substance.• The skin shell forms a high-density phase that is more elastic, stiffer, chemically and thermally less stable with entrapped electrons, and subjective polarization.• Bond relaxation happens only in the skin in a radial way. The extent and depth of bond relaxation increase with surface curvature.• In placing with the conventional concept of surface free energy, the energy density and the atomic cohesive energy in the skin region determine the performance of a surface.• BOLS notation holds for defects, skins of solids and liquids, as well as molecules in gaseous phases. Skin Bond Relaxation Monolayer RelaxationThere has been huge database of skin bond contraction for flat surfaces (Table 12.1 and Fig. 11.2b). Atomic undercoordination-induced bond contraction derived interlayer relaxation and intra-plane reconstruction are common. For instance, LEED and DFT revealed some 10 % reduction in the first-layer spacing (d 12 ) of the hcp (1010)

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Chiral and Luminescent TiO₂ Nanoparticles

Cleary

Purcell-Milton

Vandekerckhove

et al. 2017

Advanced Optical Materials

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In this work, new chiral and luminescent TiO2 nanomaterials are prepared by a single step nonaqueous synthesis. Using circular dichroism spectroscopy it is shown that TiO2 nanoparticles are optically active with almost identical mirror images of one another in the band‐edge region of titanium dioxide. Investigations of the photoluminescence properties reveal a broad shallow trap state emission centered at 440 nm, with a photoluminescence quantum yield of ≈3.5%, which is among the highest reported for TiO2. Electron microscopy reveals the TiO2 nanostructures to be dendritic aggregates measuring 30–50 nm in size composed of smaller nanorods of 3–4 nm in diameter.

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Theory of Size, Confinement, and Oxidation Effects

Cited by 7 publications

References 107 publications

Size dependence of nanostructures: Impact of bond order deficiency

Size dependence of nanostructures: Impact of bond order deficiency

Skin Bond Relaxation and Nanosolid Densification

Chiral and Luminescent TiO₂ Nanoparticles

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Theory of Size, Confinement, and Oxidation Effects

Cited by 7 publications

References 107 publications

Size dependence of nanostructures: Impact of bond order deficiency

Size dependence of nanostructures: Impact of bond order deficiency

Skin Bond Relaxation and Nanosolid Densification

Chiral and Luminescent TiO2 Nanoparticles

Contact Info

Product

Resources

About

Chiral and Luminescent TiO₂ Nanoparticles