Morphology Dependence in Photothermal Heating of Gold Nanomaterials with Near-Infrared Laser

Alrahili, Mazen; Peroor, Renju; Savchuk, Viktoriia; McNear, Kelly; Pinchuk, Anatoliy O.

doi:10.1021/acs.jpcc.9b11821

Cited by 31 publications

(22 citation statements)

References 57 publications

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“…Recently, we investigated a set of nano-gold with different morphologies such as GNSs, GNRs, GNUs, and gold conjugates with IR dye attached to 20-nm GNSs. We found that AuNPC exhibit an enhanced ‘light to heat energy conversion efficiency (η)’ by a factor four than those in the unmodified gold nanospheres 19 .…”

Section: Introductionmentioning

confidence: 86%

Absorption cross section of gold nanoparticles based on NIR laser heating and thermodynamic calculations

Alrahili

Savchuk

McNear

et al. 2020

Sci Rep

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We present a method for measuring the optical absorption cross section ($$\sigma_{abs}$$ σ abs ) of gold nanoparticles (GNPs) based on optically heating the solution of GNPs with an 808 nm near-infrared (NIR) laser and measuring the temperature increase of the solution. We rely on the theoretical calculations based on the heat diffusion equations and experimental measurements based on the energy balance equations to measure the $$\sigma_{abs}$$ σ abs and the temperature distribution of single GNPs. Several morphologies, including gold nanospheres (GNSs), spherical gold nanoparticle conjugate (AuNPC), which are 20 nm GNSs surface-functionalized with an IR 808 dye, gold nanorods (GNRs), and gold nanourchins (GNUs), were studied. The study found that a single 20 nm GNS has the lowest $$\sigma_{abs}$$ σ abs and temperature distribution as compared to 100 nm GNUs. By increasing the size of GNSs from 20 to 30 nm, the magnitude of $$\sigma_{abs}$$ σ abs as well as temperature distribution increases by a factor of 5. The $$\sigma_{abs}$$ σ abs values of 20 and 30 nm GNSs calculated by Mie theory and the experimentally measured are in a good agreement. GNRs with equivalent radius ($$R_{eq}$$ R eq ) 9.16 nm show the second lowest $$\sigma_{abs}$$ σ abs . By increasing the $$R_{eq}$$ R eq by a factor of 2 to 19.2 nm, the measured $$\sigma_{abs}$$ σ abs and temperature distribution also increased by a factor of 2. We also estimated $$\sigma_{abs}$$ σ abs for GNUs with diameters at 80 and 100 nm, which also have higher $$\sigma_{abs}$$ σ abs values. This work confirms that we can use temperature to accurately measure the $$\sigma_{abs}$$ σ abs of a variety of GNPs in solution.

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Section: Introductionmentioning

confidence: 86%

Absorption cross section of gold nanoparticles based on NIR laser heating and thermodynamic calculations

Alrahili

Savchuk

McNear

et al. 2020

Sci Rep

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“…36 This further proves that the coupling effect brought by the gap between the particles can enhance its photothermal performance. Most of the existing studies focused on the photothermal performances of AuNPs dispersions and nanoparticle array patterned on at surfaces, [37][38][39][40][41] but few reported the heat generation capability of the gold nanoparticle arrays on the surface of other nanospheres for their potential photothermal application. 42 For multi-component core-shell gold nanomaterials, more attention has been paid on the photothermal conversion capability of the gold shell.…”

Section: Introductionmentioning

confidence: 99%

Photothermal conversion of SiO₂@Au nanoparticles mediated by surface morphology of gold cluster layer

Yang

Yan

et al. 2020

RSC Adv.

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“…The temperature elevation is more important in the case of GNR than GNU at the same concentration as already reported in other similar works. [51] The temperature elevation ΔT after 15 min versus concentration is reported in Figure 3. ΔT increases linearly with nanoparticles concentration and is highly dependent on the illumination wavelength compared to the LSPR position.…”

Section: Gnrs Heating Measurements Under Near-ir Illuminationmentioning

confidence: 99%

“…This phenomenon was recently demonstrated by Alrahili at al. [51] since GNRs absorb more light and quickly convert it to heat especially when the absorption matches with the laser wavelength. www.advancedsciencenews.com www.particle-journal.com…”

Section: Gnrs Heating Measurements Under Near-ir Illuminationmentioning

confidence: 99%

Size, Shape, and Wavelength Effect on Photothermal Heat Elevation of Gold Nanoparticles: Absorption Coefficient Experimental Measurement

Diallo

Tlemçani

Khan

et al. 2020

Part & Part Syst Charact

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Complex‐shaped nanoparticles as gold nanourchins (GNU) and nanorods (GNR) are very suitable agents in the case of photothermal therapy due to their photon‐heat conversion ability in the red and near‐infrared region (NIR). The quantification in heat generation of complex shaped nanostructures is an important key to predict the therapeutic effect of these nanoparticles. For that, the determination of the nanoparticles absorption cross section (σAbs) responsible for the heat generation is one of the important steps before any application. Although it is obvious to determine σAbs for spheres via Mie's theory, in the case of complex structures like GNU or GNR, this parameter is difficult to model. In this work, a new methodology is used to determine experimentally σAbs for both GNU and GNR. Experimental measurements of the photothermal properties of 100 nm size GNU and two different sizes of GNRs are studied regarding different parameters such as concentration, laser excitation wavelength, and exposure time. By using the heat transfer theory, the temperature elevation in the nanoparticles solutions is converted to temperature elevation at the nanoparticles surface and σAbs values are then calculated for both GNU and GNR in the NIR spectral region.

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Morphology Dependence in Photothermal Heating of Gold Nanomaterials with Near-Infrared Laser

Cited by 31 publications

References 57 publications

Absorption cross section of gold nanoparticles based on NIR laser heating and thermodynamic calculations

Absorption cross section of gold nanoparticles based on NIR laser heating and thermodynamic calculations

Photothermal conversion of SiO₂@Au nanoparticles mediated by surface morphology of gold cluster layer

Size, Shape, and Wavelength Effect on Photothermal Heat Elevation of Gold Nanoparticles: Absorption Coefficient Experimental Measurement

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Morphology Dependence in Photothermal Heating of Gold Nanomaterials with Near-Infrared Laser

Cited by 31 publications

References 57 publications

Absorption cross section of gold nanoparticles based on NIR laser heating and thermodynamic calculations

Absorption cross section of gold nanoparticles based on NIR laser heating and thermodynamic calculations

Photothermal conversion of SiO2@Au nanoparticles mediated by surface morphology of gold cluster layer

Size, Shape, and Wavelength Effect on Photothermal Heat Elevation of Gold Nanoparticles: Absorption Coefficient Experimental Measurement

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Photothermal conversion of SiO₂@Au nanoparticles mediated by surface morphology of gold cluster layer