<i>Surface Science: An Introduction</i>

Hudson, John B.; Diehl, Renee D.

doi:10.1119/1.16970

Cited by 73 publications

(54 citation statements)

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“…From kinetic theory, the impingement rate of nitrogen at atmospheric pressure and near room temperature is 3 Â 10 23 molecules/cm 2 /s. 31 For the graphene density of 38 carbon atoms/nm 2 , this corresponds to one molecular collision with each carbon atom every 10 ns. For a diameter d=0.7 nm nanotube, along the length of order l = 1 nm defining the exciton at any given instant, this corresponds to a collision with the surface area πdl = 2.2 nm 2 every 150 ps.…”

Section: Discussionmentioning

confidence: 99%

Photoinduced Band Gap Shift and Deep Levels in Luminescent Carbon Nanotubes

Finnie

Jacques

2012

ACS Nano

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Individual air-suspended single-walled carbon nanotubes are imaged both spatially and spectrally in photoluminescence. At low excitation power, photoluminescence is bright and stable with high quantum efficiency; however, higher power initially causes a gradual red shift and then more severe changes. Blinking, the loss of quantum efficiency, and the appearance of new deep levels are all seen and can be explained by the introduction of defects. We propose that optical excitation induces molecular deposition onto the nanotube by optically induced van der Waals interactions, leading to physisorption and ultimately chemisorption which severely degrades the luminescence.KEYWORDS: single-walled carbon nanotube . photoluminescence . exciton . quantum efficiency . band gap shift . van der Waals interaction ARTICLE FINNIE AND LEFEBVRE

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Section: Discussionmentioning

confidence: 99%

Photoinduced Band Gap Shift and Deep Levels in Luminescent Carbon Nanotubes

Finnie

Jacques

2012

ACS Nano

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“…3B shows the equilibrium differential deflection signal as a function of target concentration. These concentration-dependent data were fitted to the Langmuir adsorption isotherm model (14) to derive the thermodynamic surface-solution equilibrium constant, K Ϫ1 . The theory was developed originally to describe the reaction of gas-phase molecules on a metal surface but also can model solution-phase data.…”

Section: Figmentioning

confidence: 99%

Multiple label-free biodetection and quantitative DNA-binding assays on a nanomechanical cantilever array

McKendry

Zhang

Arntz

et al. 2002

Proc. Natl. Acad. Sci. U.S.A.

571

481

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We report a microarray of cantilevers to detect multiple unlabeled biomolecules simultaneously at nanomolar concentrations within minutes. Ligand-receptor binding interactions such as DNA hybridization or protein recognition occurring on microfabricated silicon cantilevers generate nanomechanical bending, which is detected optically in situ. Differential measurements including reference cantilevers on an array of eight sensors can sequence-specifically detect unlabeled DNA targets in 80-fold excess of nonmatching DNA as a background and discriminate 3 and 5 overhangs. Our experiments suggest that the nanomechanical motion originates from predominantly steric hindrance effects and depends on the concentration of DNA molecules in solution. We show that cantilever arrays can be used to investigate the thermodynamics of biomolecular interactions mechanically, and we have found that the specificity of the reaction on a cantilever is consistent with solution data. Hence cantilever arrays permit multiple binding assays in parallel and can detect femtomoles of DNA on the cantilever at a DNA concentration in solution of 75 nM.

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“…The ΓNano of LSnanop is related to the nanoparticle concentration (XNano) dependence of surface tension, γ. This relation is called the Gibbs adsorption formula [28], whose explicit form is written as follows:…”

Section: Shear Viscosity Of Lsnanopmentioning

confidence: 99%

The Promising Features of New Nano Liquid Metals—Liquid Sodium Containing Titanium Nanoparticles (LSnanop)

Itami

Saito

Ara

2015

Metals

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Abstract:A new kind of suspension liquid was developed by dispersing Ti nanoparticles (10 nm) in liquid Na, which was then determined by TEM (transmission electron microscopy) analysis. The volume fraction was estimated to be 0.0088 from the analyzed Ti concentration (2 at. %) and the densities of Ti and Na. This suspension liquid, Liquid Sodium containing nanoparticles of titanium (LSnanop), shows, despite only a small addition of Ti nanoparticles, many striking features, namely a negative deviation of 3.9% from the ideal solution for the atomic volume, an increase of 17% in surface tension, a decrease of 11% for the reaction heat to water, and the suppression of chemical reactivity to water and oxygen. The decrease in reaction heat to water seems to be derived from the existence of excess cohesive energy of LSnanop. The excess cohesive energy was discussed based on simple theoretical analyses, with particular emphasis on the screening effect. The suppression of reactivity is discussed with the relation to the decrease of heat of reaction to water or the excess cohesive energy, surface tension, the action as a plug of Ti oxide, negative adsorption on the surface of LSnanop, and percolation.

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Surface Science: An Introduction

Cited by 73 publications

References 0 publications

Photoinduced Band Gap Shift and Deep Levels in Luminescent Carbon Nanotubes

Photoinduced Band Gap Shift and Deep Levels in Luminescent Carbon Nanotubes

Multiple label-free biodetection and quantitative DNA-binding assays on a nanomechanical cantilever array

The Promising Features of New Nano Liquid Metals—Liquid Sodium Containing Titanium Nanoparticles (LSnanop)

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