Variable band gap ZnO nanostructures grown by pulsed laser deposition

Kukreja, L. M.; Barik, Sujit K.; Misra, Pankaj

doi:10.1016/j.jcrysgro.2004.04.086

Cited by 55 publications

(30 citation statements)

References 15 publications

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“…Thus, the products available at the market in the form of metal oxides NPs have the particles of size higher than 15 nm. However, as mentioned earlier, at this level of size, specific sizerelated changes of such electronic properties are not significant, and from this viewpoint, the particles behave similarly to a bulk (Kukreja et al, 2004;Labat et al, 2008;Zhang and Tang, 2004). On the other hand, ironically, they are more toxic to bacteria/microorganism/human than the particles of more than 100 nm.…”

Section: Resultsmentioning

confidence: 67%

“…Recent contributions show that large, size-dependent changes of the electron affinity for such metal oxides such as ZnO and TiO 2 occur below about 5 nm; the changes between 15 and 90 nm are negligible (Kukreja et al, 2004;Labat et al, 2008;Zhang and Tang, 2004). Therefore, the molecular parameters of the studied oxides reliably described predicted characteristics.…”

Section: Resultsmentioning

confidence: 87%

See 1 more Smart Citation

Periodic table-based descriptors to encode cytotoxicity profile of metal oxide nanoparticles: A mechanistic QSTR approach

Kar

Gajewicz

Puzyn

et al. 2014

Ecotoxicology and Environmental Safety

107

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Section: Resultsmentioning

confidence: 67%

Section: Resultsmentioning

confidence: 87%

Periodic table-based descriptors to encode cytotoxicity profile of metal oxide nanoparticles: A mechanistic QSTR approach

Kar

Gajewicz

Puzyn

et al. 2014

Ecotoxicology and Environmental Safety

107

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“…First, the charge gap redshifts by 0.5 eV between the polycrystal and the longest nanorods. This is different than the standard size-induced band gap hardening [43][44][45][46] and can likely be attributed to aspect ratio effects and the rod-like morphology. Second, the charge gap hardens with decreasing size -from 2.7 eV in the longest nanorods to 2.9 eV in the shortest.…”

mentioning

confidence: 57%

Vibronic coupling and band gap trends in CuGeO3 nanorods

O’Neal

al-Wahish

et al. 2017

Phys. Rev. B

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We measured the optical response of CuGeO3 nanorods in order to reveal size effects on the electronic properties. The vibronically-activated d-to-d color band excitations are activated by the 131 and 478 cm −1 phonons, with the relative contribution of the lower frequency O-Cu-O bending mode increasing with decreasing size until it dominates the process. We also uncover trends in the direct band gap, with the charge transfer transfer edge hardening with decreasing size. These findings advance the understanding of size effects in low-dimensional copper oxides.

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“…The quantum size effect is observed in cadmium sulfide (CdS) films, where the bandgap of the films is decreased with increase in particle size. Multilayer matrices of alumina capped zinc oxide nanoparticles with mean radii in the range of 1.8-3.6 nm were grown using pulsed laser deposition method to obtain size-dependent bandgap up to about 4.5 eV [11]. Our recent studies have evidenced that the bandgap of the CdO could be tuned by copper (Cu) doping [12].…”

Section: Introductionmentioning

confidence: 99%