Nanomaterial Properties: Size and Shape Dependencies

Guisbiers, Grégory; Mejía-Rosales, Sergio; Deepak, Francis Leonard

doi:10.1155/2012/180976

Cited by 110 publications

(52 citation statements)

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“…NMs are up to 10,000 times smaller in comparison to the width of a human hair, which makes them very valuable for all kinds of practical uses. NMs are simply defined as materials of ever-smaller length scales (<100 nm) which are used to impart altered or enhanced properties (Guisbiers et al 2012). There are two specific methods (Wong, Brough, and Ho 2009) that are used to produce NMs: (i) top-down method in which very small components are produced using larger parts of the material; (ii) bottom-up methodwhere the NMs are produced by processing molecule by molecule or atom by atom.…”

Section: Definition Of Nanowastementioning

confidence: 99%

Environmental Nanotechnology: Global Framework and Integrative Strategies of Nanowaste Management

Mishra

Tiwari

Arya

et al. 2020

Handbook of Environmental Materials Management

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Nanotechnology grabbed wide-reaching attention due to its incomparable and versatile uses and applications. Waste is emerging as the preeminent concern among researchers, industries, and other stakeholders. Although various attempts have already been done and are still improvising. Presently, the unpredictable interactions of nanomaterials (NMs) waste with other natural and synthetic components may lead to disastrous fallouts. This chapter will encapsulate the informative structure of nanomaterial-based wastes categorically and the possible, existing treatment technologies available. This chapter will also add a notable amount of knowledge of "Then, Now and Beyond" about the NMs wastes. The fate of the recovered wastes like reuse and reduce technology will also be discussed in this chapter. Nanotechnology is the most promising technology but the hidden facts are undiscussed or not discovered yet in the available literature. This also provokes the researchers to focus on the undiscovered part of NMs wastes and upgrading the existing technologies. NMs wastes are generated through the different phases like at the time of manufacturing of NMs, during the use and reuse of the NMs, or the waste generated after the end of the use of NMs/by-products out of production. This chapter will be helpful to know about the "cradle to grave" information about the NMs.

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Section: Definition Of Nanowastementioning

confidence: 99%

Environmental Nanotechnology: Global Framework and Integrative Strategies of Nanowaste Management

Mishra

Tiwari

Arya

et al. 2020

Handbook of Environmental Materials Management

View full text Add to dashboard Cite

show abstract

“…Properties that vary with size include the catalytic, ferromagnetic, and mechanical characteristics, colour, surface tension, phase change temperature, and latent heat [23,39]. For example, colloidal gold with particles smaller than 40 nm has a colour ranging from clear to yellow, between 40-100 nm it has a reddish hue, between 100-120 nm the colour becomes purple.…”

Section: Introductionmentioning

confidence: 99%

The Stefan problem with variable thermophysical properties and phase change temperature

Myers

Hennessy

Calvo-Schwarzwälder

2020

International Journal of Heat and Mass Transfer

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In this paper we formulate a Stefan problem appropriate when the thermophysical properties are distinct in each phase and the phase-change temperature is size or velocity dependent. Thermophysical properties invariably take different values in different material phases but this is often ignored for mathematical simplicity. Size and velocity dependent phase change temperatures are often found at very short length scales, such as nanoparticle melting or dendrite formation; velocity dependence occurs in the solidification of supercooled melts. To illustrate the method we show how the governing equations may be applied to a standard one-dimensional problem and also the melting of a spherically symmetric nanoparticle. Errors which have propagated through the literature are highlighted. By writing the system in non-dimensional form we are able to study the large Stefan number formulation and an energy-conserving one-phase reduction. The results from the various simplifications and assumptions are compared with those from a finite difference numerical scheme. Finally, we briefly discuss the failure of Fourier's law at very small length and time-scales and provide an alternative formulation which takes into account the finite time of travel of heat carriers (phonons) and the mean free distance between collisions. * tmyers@crm.cat 1 arXiv:1904.05698v1 [physics.comp-ph]

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“…Nanoscale materials have received considerable attention employing their unique properties and a wide range of applications relative to their bulk counterparts [1,2]. Nanomaterials can be classi ed into zero-, one-, and two-dimensional structures depending on the shape and size.…”

Section: Introductionmentioning

confidence: 99%

Boron Carbide Nanowires from Castor Oil for Optronic Applications: A Low-Temperature Greener Approach

Devi

Swapna

Sankararaman

2020

Preprint

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The development of one-dimensional nanostructures has revolutionized electronic and photonic industries because of their unique properties. The present paper reports the low-temperature green synthesis of boron carbide nanowires, of diameter 14 nm and length 750 nm, by the condensation method using castor oil as the carbon precursor. The nanowires synthesized exhibit beaded chain morphology, and bandgap energy of 2.08 eV revealed through the Tauc plot analysis. The structure of boron carbide nanowires is revealed by Fourier transform infrared spectroscopy and X-ray diffraction analyses. The photoluminescence study reveals the nanowire's blue light emission capability under ultraviolet excitation, which is substantiated by the CIE plot suggesting its potential in photonic applications.

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Nanomaterial Properties: Size and Shape Dependencies

Cited by 110 publications

References 0 publications

Environmental Nanotechnology: Global Framework and Integrative Strategies of Nanowaste Management

Environmental Nanotechnology: Global Framework and Integrative Strategies of Nanowaste Management

The Stefan problem with variable thermophysical properties and phase change temperature

Boron Carbide Nanowires from Castor Oil for Optronic Applications: A Low-Temperature Greener Approach

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