Size-Dependent-Transport Study of $\hbox{In}_{0.53} \hbox{Ga}_{0.47}\hbox{As}$ Gate-All-Around Nanowire MOSFETs: Impact of Quantum Confinement and Volume Inversion

Size-dependent penetration of CDs through the ferritin channels has been successfully demonstrated by means of λex-dependent PL quenching of CDs by the Fe3+ ions of ferritin.

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SIZE-DEPENDENT NONRESONANT THIRD-ORDER NONLINEAR SUSCEPTIBILITIES OF CdS CLUSTERS FROM 7 TO 120 Å

Journal of Nonlinear Optical Physics & Materials ◽

10.1142/s0218199192000339 ◽

1992 ◽

Vol 01 (04) ◽

pp. 683-698 ◽

Cited By ~ 5

Author(s):

YING WANG ◽

NORMAN HERRON

Keyword(s):

Refractive Index ◽

Quantum Confinement ◽

Optical Switching ◽

Quantum Confinement Effect ◽

Surrounding Medium ◽

Confinement Effect ◽

Third Order ◽

Size Dependent ◽

Size Regime ◽

Fundamental Wavelength

We report the third-order nonlinear susceptibilities χ(3) of CdS clusters (quantum dots) from 7 to 120 Å, measured by third-harmonic generation technique at a fundamental wavelength of 1.91 µm. In the size regime studied, the value of χ(3) first increases with cluster size and then levels off for cluster diameter larger than 60 Å. The volume normalized χ(3) of CdS cluster is about a factor of 2 higher than that of the bulk. These data can be explained by the enhancement in electric field inside the clusters due to the dielectric confinement effect. The size and wavelength dependences of this local field effect have been calculated for CdS clusters. Several trends in the nonresonant χ(3) can be identified: (i) In the absence of quantum confinement effect, the magnitude of χ(3) should be constant in the < 200 Å size regime. It then increases with increasing particle size until the structural resonance regime is reached. (ii) The magnitude of χ(3) can be enhanced by either lowering the refractive index of the surrounding medium or raising the refractive index of the semiconductors. (iii) Quantum confinement, which shifts the band gap to the blue and lowers the refractive index of the semiconductor clusters, reduces the nonresonant χ(3). This is in direct contrast to the resonant nonlinearity which is enhanced by the quantum-confinement effect. Finally, we discuss the size-dependent figure-of-merit of CdS composites for all-optical switching.

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Graphene Quantum Dots as Flourishing Nanomaterials for Bio-Imaging, Therapy Development, and Micro-Supercapacitors

Micromachines ◽

10.3390/mi11090866 ◽

2020 ◽

Vol 11 (9) ◽

pp. 866

Author(s):

Merve Kortel ◽

Bhargav D. Mansuriya ◽

Nicole Vargas Santana ◽

Zeynep Altintas

Keyword(s):

Quantum Dots ◽

Structural Properties ◽

Edge Effects ◽

Quantum Confinement ◽

Review Paper ◽

Graphene Quantum Dots ◽

Heteroatom Doping ◽

Size Dependent ◽

Bio Imaging ◽

Therapy Development

Graphene quantum dots (GQDs) are considerably a new member of the carbon family and shine amongst other members, thanks to their superior electrochemical, optical, and structural properties as well as biocompatibility features that enable us to engage them in various bioengineering purposes. Especially, the quantum confinement and edge effects are giving GQDs their tremendous character, while their heteroatom doping attributes enable us to specifically and meritoriously tune their prospective characteristics for innumerable operations. Considering the substantial role offered by GQDs in the area of biomedicine and nanoscience, through this review paper, we primarily focus on their applications in bio-imaging, micro-supercapacitors, as well as in therapy development. The size-dependent aspects, functionalization, and particular utilization of the GQDs are discussed in detail with respect to their distinct nano-bio-technological applications.

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Temperature Dependent Transport Study of a Single-Wall Carbon Nanotube Network

10.1063/1.3295440 ◽

2010 ◽

Author(s):

Jongseung Hwang ◽

Jung Hyun Oh ◽

Maeng Ho Son ◽

Doyeol Ahn ◽

Hee Tae Kim ◽

...

Keyword(s):

Carbon Nanotube ◽

Temperature Dependent ◽

Single Wall Carbon Nanotube ◽

Single Wall Carbon ◽

Transport Study ◽

Carbon Nanotube Network ◽

Dependent Transport

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Quantum confinement effect and size-dependent photoluminescence in laser ablated ultra-thin GZO films

Materials Letters ◽

10.1016/j.matlet.2017.09.061 ◽

2018 ◽

Vol 210 ◽

pp. 358-362 ◽

Cited By ~ 9

Author(s):

Ali Hassan ◽

Muhammad Irfan ◽

Yijian Jiang

Keyword(s):

Quantum Confinement ◽

Quantum Confinement Effect ◽

Confinement Effect ◽

Size Dependent

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Fascinating World of Nanomaterials, Applications and Technology Hurdles in Commercial Production

MRS Proceedings ◽

10.1557/proc-1209-p02-04 ◽

2009 ◽

Vol 1209 ◽

Author(s):

Shiva Hullavarad ◽

Nilima Hullavarad

Keyword(s):

Quantum Confinement ◽

Building Blocks ◽

Semiconductor Nanostructures ◽

Commercial Production ◽

Scientific Field ◽

Bohr Radius ◽

Semiconducting Nanowires ◽

Size Dependent ◽

Low Dimensional ◽

De Broglie Wavelength

AbstractNanoparticles, nanowires, nanorods and other kinds of nanostructures have been of great interest to scientific field. Semiconducting nanowires have attracted much attention due to the fact that reduced dimensional confinement of electrons, holes and photons make them particularly attractive as potential building blocks for nanoscale optoelectronic devices, highly quantum efficient lasers and non-linear optical converters. It is generally accepted that the low dimensional structures (where the size in one direction is equivalent to or smaller than the de Broglie wavelength) are useful materials for investigating the dependence of electrical and thermal transport or mechanical properties on the dimensionality and quantum confinement. Nanomaterials also play an important role as functional units in fabricating the electromechanical devices. Semiconductor nanostructures of different materials and shapes are investigated due to their size dependent electronic properties observable at dimensions comparable to or less than Bohr radius of exciton in these materials. Especially various oxides and sulphides have generated interests in variety of applications. In this paper, the recent progress in various nanostructures, paradigms in implementation and technology hurdles in implementing nanostructures are discussed

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Metal chalcogenide quantum dots: biotechnological synthesis and applications

RSC Advances ◽

10.1039/c6ra08447h ◽

2016 ◽

Vol 6 (47) ◽

pp. 41477-41495 ◽

Cited By ~ 50

Author(s):

J. Mal ◽

Y. V. Nancharaiah ◽

E. D. van Hullebusch ◽

P. N. L. Lens

Keyword(s):

Quantum Dots ◽

Quantum Confinement ◽

Metal Sulfide ◽

Metal Chalcogenide ◽

Size Dependent

Metal chalcogenide (metal sulfide, selenide and telluride) quantum dots (QDs) have attracted considerable attention due to their quantum confinement and size-dependent photoemission characteristics.

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