Photoluminescence from silver/carbon nanotubes composites

Barberio, M.; Barone, P.; Pingitore, V.; Bonanno, A.; Xu, F.

doi:10.1016/j.spmi.2013.02.004

Cited by 7 publications

(9 citation statements)

References 26 publications

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“…The results of both, the cross section and the concentration evolution suggest that in the first 30 s only the primary particles produced by LASiS are present as colloidal in the solution. When the concentration of the primary particles reaches saturation, an aggregation process starts, causing the formation in the solution of a particle cluster with bigger dimensions (with a process similar to what was observed for silver NPs in our previous work [20]). Morphological analysis of a droplet of solution taken at two different irradiation times (35 s and 120 s) confirms these results.…”

Section: Resultssupporting

confidence: 60%

Nanostructured target fabrication with metal and semiconductor nanoparticles

Barberio¹,

Antici²

2015

Mater. Res. Express

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The development of ultra-intense high-energy (≫1 J) short (<1 ps) laser pulses in the last decade has enabled the acceleration of high-energy short-pulse proton beams. A key parameter for enhancing the acceleration regime is the laser-to-target absorption, which heavily depends on the target structure and material. In this work, we present the realization of a nanostructured target with a sub-laser wavelength nano-layer in the front surface as a possible candidate for improving the absorption. The nanostructured film was realized by a simpler and cheaper method than using conventional lithographic techniques: A colloidal solution of metallic or semiconductor nanoparticles (NPs) was produced by laser ablation and, after a heating and sonication process, was spray-dried on the front surface of an aluminum target. The obtained nanostructured film with a thickness of 1 μm appears, at morphological and chemical analysis, uniformly nanostructured and distributed on the target surface without the presence of oxides or external contaminants. Finally, the size of the NPs can be tuned from tens to hundreds of nanometers simply by varying the growth parameters (i.e., irradiation time, fluence, and laser beam energy).

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Section: Resultssupporting

confidence: 60%

Nanostructured target fabrication with metal and semiconductor nanoparticles

Barberio¹,

Antici²

2015

Mater. Res. Express

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“…We attribute this behavior to great interaction between silver nanoparticles and oxygen. In our recent work [8] we demonstrate that silver nanoparticles exposed to atmospheric oxygen interact with oxygen to form silver oxide also in this case the exposure to O 2 leads, as well as the oxygen absorption on surface, to the formation of silver oxide on Ag/MWCNT (as indicated by the Ag 3d XPS lines). So, the physisorbed oxygen is desorbed at 45 K (as on MWCNT or copper) while the chemisorbed oxygen is desorbed at higher temperature of 50 K.…”

Section: Resultsmentioning

confidence: 71%

“…Recently we introduced a simple method to obtain composites based on carbon nanotubes doped with Ag nanoparticles [8]. We obtained that the Ag doping produces strong changes in electronic and optical properties of carbon nanotubes at very low nanoparticle concentration [8]. In this work we investigate the possibility to use these new materials as gas cryosorbers and demonstrate that the Ag doping improves the adsorption without changing the physical properties of chemical bonds between gas and surfaces.…”

Section: Introductionmentioning

confidence: 91%

“…So, the insertion of metallic nanoparticles in nanotube networks can lead to the formation of composites with very great surface area. Recently we introduced a simple method to obtain composites based on carbon nanotubes doped with Ag nanoparticles [8]. We obtained that the Ag doping produces strong changes in electronic and optical properties of carbon nanotubes at very low nanoparticle concentration [8].…”

Section: Introductionmentioning

confidence: 99%

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Adsorption of Molecular Gases on Silver/Carbon Nanotube Composites at Low Temperatures and Low Pressures

Barberio

Barone

Stranges

et al. 2014

Journal of Chemistry

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We present an experimental study adsorption of molecular gases (N2, H2, O2, CH4, C2H4, and C2H6) on multiwalled carbon nanotubes (MWCNTs) and MWCNT doped with Ag at low temperatures (35 K) and pressures (10−6 Torr) using the temperature programmed desorption technique. Our results show that the desorption kinetics is of the first order; furthermore comparative measurements indicate that Ag/MWCNTs have an adsorption capacity higher than that of a pure sample suggesting that these composites are good candidates as gas cryosorbers for applications in cryopumps or sensor of latest generation.

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“…9,10 To combine these two functions in a unique array becomes outstandingly necessary for the development of multifunction smart devices, enabling detection at long-distance and transfer in real time the moisture between inside and outside, thus preventing the formation of the hostile ambient. [13][14][15][16][17] However, the great potential of these fillers to provide multifunctions when accommodated in microarrays has not been explored fully yet. [13][14][15][16][17] However, the great potential of these fillers to provide multifunctions when accommodated in microarrays has not been explored fully yet.…”

Section: Introductionmentioning

confidence: 99%

Integrated carboxylic carbon nanotube pathways with membranes for voltage-activated humidity detection and microclimate regulation

et al. 2015

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This work describes some single walled carboxylic carbon nanotubes with outstanding transport properties when assembled in a 3D microarray working like a humidity membrane-sensor and an adjustable moisture regulator. Combined nano-assembly approaches are used to build up a better quality pathway through which assisted-charge and mass transport synchronically takes place. The structure-electrical response relationship is found, while controllable and tunable donor-acceptor interactions established at material interfaces are regarded as key factors for the accomplishment of charge transportation, enhanced electrical responses and adjustable moisture exchange. Raman and infrared spectroscopy provides indications about the fine structural and chemical features of the hybrid-composite membranes, resulting in perfect agreement with related morphology and electrical properties. Enhanced and modular electrical response to changes in the surrounding atmosphere is concerned with doping events, while assisted moisture regulation is discussed in relation to swelling and hopping actions. The electro-activated hybrid-composite membrane proposed in this work can be regarded as an attractive 'sense-to-act' precursor for smart long-distance monitoring systems with capability to adapt itself and provide local comfortable microenvironments.

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Photoluminescence from silver/carbon nanotubes composites

Cited by 7 publications

References 26 publications

Nanostructured target fabrication with metal and semiconductor nanoparticles

Nanostructured target fabrication with metal and semiconductor nanoparticles

Adsorption of Molecular Gases on Silver/Carbon Nanotube Composites at Low Temperatures and Low Pressures

Integrated carboxylic carbon nanotube pathways with membranes for voltage-activated humidity detection and microclimate regulation

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