2018
DOI: 10.1021/acs.chemmater.8b04299
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Enhancing the Plasmon Resonance Absorption of Multibranched Gold Nanoparticles in the Near-Infrared Region for Photothermal Cancer Therapy: Theoretical Predictions and Experimental Verification

Abstract: Multibranched gold nanoparticles (M-AuNPs) can serve as photothermal agents for near-infrared (NIR) photothermal therapy (PTT) of cancer, but a major shortcoming is that they tend to strongly scatter NIR light, causing a significant reduction in absorption. This work addresses this issue, based on theoretical simulations and experimental determinations, to enhance the absorption and reduce the scattering of these materials by screening their structural parameters. Our finite-difference time-domain simulations … Show more

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Cited by 40 publications
(28 citation statements)
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“…In the synthesis, DMF is a weak reducing agent for the reduction of Au 3+ to Au + ions, and thus, PVP behaved as both the reducing agent, to further reduce the generated Au + to Au 0 , and the stabilizing agent for the produced Au 0 . Moreover, PVP can guide the anisotropic growth of Au 0 on the surface of the Au seeds to produce M-AuNPs by preferentially adsorbing on the (111) faces of the Au seeds and inhibiting further deposition of Au 0 atoms on these faces . Therefore, the morphology of the M-AuNPs can be tailored by PVP and the concentrations of the Au seeds.…”
Section: Results and Discussionmentioning
confidence: 99%
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“…In the synthesis, DMF is a weak reducing agent for the reduction of Au 3+ to Au + ions, and thus, PVP behaved as both the reducing agent, to further reduce the generated Au + to Au 0 , and the stabilizing agent for the produced Au 0 . Moreover, PVP can guide the anisotropic growth of Au 0 on the surface of the Au seeds to produce M-AuNPs by preferentially adsorbing on the (111) faces of the Au seeds and inhibiting further deposition of Au 0 atoms on these faces . Therefore, the morphology of the M-AuNPs can be tailored by PVP and the concentrations of the Au seeds.…”
Section: Results and Discussionmentioning
confidence: 99%
“…M-AuNPs were synthesized by a seed-assisted growth method using poly­(vinylpyrrolidone) (PVP) and N , N -dimethylformamide (DMF) as reducing agents. , Au seeds, with a diameter of ∼15 nm, were synthesized by reducing AuCl 4 – with sodium citrate, according to a slightly modified published procedure . Typically, in a condenser-equipped round-bottom flask (250 mL), 100 mL of HAuCl 4 (0.01 wt %) was first heated to boiling under vigorous stirring, followed by the rapid introduction of sodium citrate (3 mL, 1 wt %), causing a color change from pale yellow to burgundy.…”
Section: Methodsmentioning
confidence: 99%
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“…Similarly, nanoliposomes possess a specific characteristic of carrying both hydrophobic and hydrophilic drugs due to their double lipid membrane ( 25 , 26 ). Metallic NPs can serve as theranostics by carrying anticancer drugs and taking advantage of surface plasmon resonance for photothermal therapy and imaging ( 27 , 28 ). On another approach, nanoliposomes were used to develop a synthetic vaccine particle carryng rapamycin (SVP-rapamycin), with the objective of inducing a tolerogenic immune profile to NPs ( 29 ).…”
Section: Strategies For Site-directed Cancer Therapy Using Nssmentioning
confidence: 99%
“…[ 10–12 ] A currently fast developing area in plasmonics is metal nanoparticles. They have great applications in sensing, [ 13 ] imaging, [ 14 ] catalysis, [ 14–17 ] biomedicine, [ 18,19 ] etc. In particular, asymmetric nanoparticles have unique optical properties, which are different from their normal symmetrical nanostructures.…”
Section: Introductionmentioning
confidence: 99%