Ultrafast dynamics in unaligned MWCNTs decorated with metal nanoparticles

Manzoni, Giulia; Ponzoni, Stefano; Galimberti, Gianluca; Scarselli, Manuela; Pulci, Olivia; Camilli, Luca; Matthes, Lars; Castrucci, P.; Pagliara, Stefania

doi:10.1088/0957-4484/27/23/235704

Cited by 1 publication

(1 citation statement)

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“…A nonlinear absorption coefficient and nonlinear refractive index are strongly dependent on the NP concentration in the solutions and the duration of pulses [ 44 ]. In addition, a fast photoresponse is characteristic in CNT-decorated samples [ 45 ].…”

Section: Resultsmentioning

confidence: 99%

Navigation of Silver/Carbon Nanoantennas in Organic Fluids Explored by a Two-Wave Mixing

et al. 2020

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Within this work are analyzed third-order nonlinear optical properties with a potential influence on the dynamic mechanics exhibited by metal/carbon nanofluids. The nanofluids were integrated by multiwall carbon nanotubes decorated with Ag nanoparticles suspended in ethanol or in acetone. Optical third-order nonlinearities were experimentally explored by vectorial two-wave mixing experiments with a Nd-YAG laser system emitting nanosecond pulses at a 532 nm wavelength. An optically induced birefringence in the metal/organic samples seems to be responsible for a significant modification in density and compressibility modulus in the nanosystems. The measured nonlinear refractive index was associated with a thermal process together with changes in density, compressibility modulus and speed of sound in the samples. Nanofluid diffusivity was studied to characterize the dynamic concentration gradients related to the precipitation of nanostructures in the liquid solutions. The evolution of the nanoparticle density suspended in the nanofluids was considered as a temporal-resolved probabilistic system. It is stated that the incorporation of Ag nanoparticles in carbon nanotubes produces strong mechanical changes in carbon-based nanofluids. According to numerical simulations and optical evaluations, immediate applications for developing dynamic nanoantennas optical logic gates and quantum-controlled metal/carbon systems can be contemplated.

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Section: Resultsmentioning

confidence: 99%