Gold nanoshell density variation with laser power for induced hyperthermia

Vera, Jerry; Bayazıtoğlu, Yıldız

doi:10.1016/j.ijheatmasstransfer.2008.06.036

Cited by 66 publications

(43 citation statements)

References 10 publications

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“…This more general case has been of particular interest for applications in biomedical imaging and for unconventional therapeutics, such as photothermal ablation of tumors. (20)(21)(22)(23)(24) To numerically solve this for the case of absorberscatterers, we simulate the fate of each incident photon passing through a random ensemble of particles. (25,26) In the limit of pure absorbers or pure scatterers this approach agrees with both the Beer-Lambert law and the diffusion approximation, respectively ( Figure S1, Supporting Information).…”

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confidence: 99%

Nanoparticles Heat through Light Localization

et al. 2014

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Aqueous solutions containing light-absorbing nanoparticles have recently been shown to produce steam at high efficiencies upon solar illumination, even when the temperature of the bulk fluid volume remains far below its boiling point. Here we show that this phenomenon is due to a collective effect mediated by multiple light scattering from the dispersed nanoparticles. Randomly positioned nanoparticles that both scatter and absorb light are able to concentrate light energy into mesoscale volumes near the illuminated surface of the liquid. The resulting light absorption creates intense localized heating and efficient vaporization of the surrounding liquid. Light trapping-induced localized heating provides the mechanism for low-temperature light-induced steam generation and is consistent with classical heat transfer.

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confidence: 99%

Nanoparticles Heat through Light Localization

et al. 2014

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“…According to Figure 3, the temperature profile has a "DC" level that can be found from calculating the first term of (9) making the temperature increment to be always higher than the initial temperature as expected, because the magnetic losses inside the MNP irradiate heat to the medium surrounding it, at all times [59,60].…”

Section: Resultsmentioning

confidence: 86%

“…In addition, these quantities were also proposed by Vera and Bayazitoglu [59], Chan et al [61], Huang [64], and Melancon et al [65] who proved their efficiency in inducing MH. Consequently, one can produce a significant global temperature increment inside a cell even if the local temperature increment of each particle is negligible as long as we heat many particles in the same volume of interest.…”

Section: Discussionmentioning

confidence: 82%

“…The mathematical models were received by solving the DHFE for different BC matching each MFP, using the FTs. Major work have been done in the past to solve the DHFE equation for a cosine-MF source as can be found in [36,37,49,59]. Keblinski et al [38] found that a laser source having a constant power of 1.4·10 −8 W heating a single MNP with a radius of 65 nm can cause a temperature change of 0.06 K at the particle surface.…”

Section: Discussionmentioning

confidence: 99%

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An Analytic Analysis of the Diffusive-Heat-Flow Equation for Different Magnetic Field Profiles for a Single Magnetic Nanoparticle

Dana

Gannot

2012

Journal of Atomic, Molecular, and Optical Physics

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This study analytically analyzes the changes in the temperature profile of a homogenous and isotropic medium having the same thermal parameters as a muscular tissue, due to the heat released by a single magnetic nanoparticle (MNP) to its surroundings when subject to different magnetic field profiles. Exploring the temperature behavior of a heated MNP can be very useful predicting the temperature increment of it immediate surroundings. Therefore, selecting the most effective magnetic field profile (MFP) in order to reach the necessary temperature for cancer therapy is crucial in hyperthermia treatments. In order to find the temperature profile caused by the heated MNP immobilized inside a homogenous medium, the 3D diffusive-heat-flow equation (DHFE) was solved for three different types of boundary conditions (BCs). The change in the BC is caused by the different MF profiles (MFP), which are analyzed in this article. The analytic expressions are suitable for describing the transient temperature response of the medium for each case. The analysis showed that the maximum temperature increment surrounding the MNP can be achieved by radiating periodic magnetic pulses (PMPs) on it, making this MFP more effective than the conventional cosine profile.

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“…For hyperthermia cancer treatment, a recent advance is to inject golden nanoparticles into the tumor region in order to heat it up quickly [23][24][25][26][27][28][29][30][31][32][33][34][35][36]. Bayazitoglu and her colleagues [23][24][25] developed a model that used the finite difference time domain (FDTD) to calculate the heat distribution of nanoshells on a single layer of human biological tissue at varying particle distribution densities in different host mediums.…”

Section: Introductionmentioning

confidence: 99%

Thermal analysis in a triple-layered skin structure with embedded vasculature, tumor, and gold nanoshells

Orndorff

Ponomarev

Dai

et al. 2017

International Journal of Heat and Mass Transfer

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a b s t r a c tObtaining accurate temperature distributions in living tissue related to hyperthermia skin cancer treatment without using an intruding sensor is a challenge. Here, we report a mathematical model that can accurately determine the temperature distribution in the tumor region and surrounding normal tissue. The model is based on a modified Pennes' equation for the bioheat transfer in a 3-D triple-layered skin structure embedded with a vascular countercurrent network and a tumor appearing in the subcutaneous region. The vascular network is designed based on the constructal theory of multi-scale tree-shaped heat exchangers. The tumor is injected with gold nanoshells in order to be heated quickly. The proposed model is implemented numerically using a stable finite difference scheme. The method is demonstrated and tested by an example.

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Gold nanoshell density variation with laser power for induced hyperthermia

Cited by 66 publications

References 10 publications

Nanoparticles Heat through Light Localization

Nanoparticles Heat through Light Localization

An Analytic Analysis of the Diffusive-Heat-Flow Equation for Different Magnetic Field Profiles for a Single Magnetic Nanoparticle

Thermal analysis in a triple-layered skin structure with embedded vasculature, tumor, and gold nanoshells

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