Optical properties of magnetic-plasmonic nanoparticle multilayers

Brullot, Ward; Verbiest, Thierry

doi:10.1117/12.2060404

Cited by 3 publications

(2 citation statements)

References 21 publications

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“…One possibility is an increased intensity of the plasmon resonance in the NIR region (as can be observed in Figure 2 e), if one takes into account the 32% coupling efficiency. This increase has been reported in theoretical calculations on related systems with a layer-by-layer geometry [ 51 ]. As MgFe 2 O 4 is a known n-type semiconductor [ 52 ], another possibility is an efficient charge transfer from electrons in MgFe 2 O 4 to gold, due to the close proximity of the two nanoparticles.…”

Section: Resultssupporting

confidence: 68%

Elastic Liposomes Containing Calcium/Magnesium Ferrite Nanoparticles Coupled with Gold Nanorods for Application in Photothermal Therapy

Pacheco,

Barros,

Amorim

et al. 2024

Nanomaterials

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This work reports on the design, development, and characterization of novel magneto-plasmonic elastic liposomes (MPELs) of DPPC:SP80 (85:15) containing Mg0.75Ca0.25Fe2O4 nanoparticles coupled with gold nanorods, for topical application of photothermal therapy (PTT). Both magnetic and plasmonic components were characterized regarding their structural, morphological, magnetic and photothermal properties. The magnetic nanoparticles display a cubic shape and a size (major axis) of 37 ± 3 nm, while the longitudinal and transverse sizes of the nanorods are 46 ± 7 nm and 12 ± 1.6 nm, respectively. A new methodology was employed to couple the magnetic and plasmonic nanostructures, using cysteine as bridge. The potential for photothermia was evaluated for the magnetic nanoparticles, gold nanorods and the coupled magnetic/plasmonic nanoparticles, which demonstrated a maximum temperature variation of 28.9 °C, 33.6 °C and 37.2 °C, respectively, during a 30 min NIR-laser irradiation of 1 mg/mL dispersions. Using fluorescence anisotropy studies, a phase transition temperature (Tm) of 35 °C was estimated for MPELs, which ensures an enhanced fluidity crucial for effective crossing of the skin layers. The photothermal potential of this novel nanostructure corresponds to a specific absorption rate (SAR) of 616.9 W/g and a maximum temperature increase of 33.5 °C. These findings point to the development of thermoelastic nanocarriers with suitable features to act as photothermal hyperthermia agents.

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Section: Resultssupporting

confidence: 68%

Elastic Liposomes Containing Calcium/Magnesium Ferrite Nanoparticles Coupled with Gold Nanorods for Application in Photothermal Therapy

Pacheco,

Barros,

Amorim

et al. 2024

Nanomaterials

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“…Energy efficiency is a term accepted since the 1970s due to the oil crisis, seeking to promote policies for saving energy to avoid an economic crisis due to the high prices of fossil fuels [12], [13]. As a result, business models have emerged that seek a sustainable industry operation oriented to the circular and collaborative economy [14]. However, depending on the author, the term EE has various significances.…”

Section: Energy Management Systemsmentioning

confidence: 99%

Energy Management Systems in Latin American Industry: Case Study Colombia

Gallego

Ríos

García

et al. 2022

TecnoL.

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The increase in energy demand, mainly due to the dependence of industry and transport on fossil fuels, has led to the extensive use of these fuels and an increase in greenhouse gas emissions, generating a severe environmental concern in all countries. Then, the need for a proportionate consumption of energy resources and the decarbonization of the economy to leverage the reduction of emissions into the atmosphere becomes evident. Therefore, implementing Energy Management Systems (EnMS) within industries makes sense, seeking to promote energy's rational and efficient use. Consequently, this paper presents a bibliographic review on the integration of EnMS in the industry, highlighting the main barriers and motivators for its implementation, emphasizing the leading role that management has within companies in converting these programs into sustainable initiatives in an extended time horizon. In addition, an analysis of the Latin American panorama is presented, especially the Colombian one, on the integration of mechanisms to improve energy efficiency in industries. One of the main conclusions evidenced was the need to increase support at the regulatory level for energy efficiency programs in the industry. Currently, greater prominence is given to renewable energy sources, which are a fundamental step for the energy transition but must be complemented with the rational and efficient use of resources. Here, the industry has an essential role in representing the segment of users that more energy traditionally consumes.

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Broadband Nonreciprocal Quadrupolarization‐Induced Asymmetric Transmission (Q‐AT) in Plasmonic Nanoparticle Aggregates

2015

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Non-reciprocal asymmetric transmission, i.e., the dependence of optical transmittance on the direction of light propagation in the material, can be used in optical isolators or photonic circuits. Broadband asymmetric transmission is observed in near-field coupled aggregates of small plasmonic nanoparticles, even for unpolarized light. Non-reciprocity is demonstrated and, using a phenomenological model, induced electric quadrupole moments are identified as the root cause of the effect.

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Optical properties of magnetic-plasmonic nanoparticle multilayers

Cited by 3 publications

References 21 publications

Elastic Liposomes Containing Calcium/Magnesium Ferrite Nanoparticles Coupled with Gold Nanorods for Application in Photothermal Therapy

Elastic Liposomes Containing Calcium/Magnesium Ferrite Nanoparticles Coupled with Gold Nanorods for Application in Photothermal Therapy

Energy Management Systems in Latin American Industry: Case Study Colombia

Broadband Nonreciprocal Quadrupolarization‐Induced Asymmetric Transmission (Q‐AT) in Plasmonic Nanoparticle Aggregates

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